LS e-Mobility Solutions: High-Voltage DC Relays – Powering the shift to a fully electric future.
As electrification expands across automotive, transport, energy storage, and charging infrastructure, reliable high-voltage switching is essential. LS e-Mobility offer a full range of High-Voltage DC (HVDC) relays built for safe, efficient, and durable power control in demanding environments. Engineered for next-gen electric platforms, their range HVDC relays deliver precise, high-performance switching for currents and voltages from 400V up to 1kV.
Key Features
- High breaking capacity for safe DC interruption
- Optimized arc management for extended life
- Compact, lightweight designs for tight spaces
- Low contact resistance for better efficiency
- Hermetically sealed options for harsh conditions
- Fast, reliable switching
- Built to global automotive and industrial standards
Applications
- Battery Electric Vehicles (BEV)
- Hybrid and commercial vehicles
- EV charging infrastructure (AC & DC fast charging)
- Energy storage systems (ESS)
- Renewable energy integration
- Industrial high-voltage DC systems
- Power distribution and protection platforms
The GER and GER-M ranges of HVDC relays are designed for evolving high-voltage architectures, ensuring durability, thermal stability and seamless integration into modern battery systems and power distribution units.
Global Quality & Support
Decades of expertise in power electronics and rigorous testing ensure every relay meets electrical, mechanical and environmental standards. LS e-Mobility provides reliability from prototype to mass production.
Whether you’re designing & building EV platforms, upgrading charging networks, designing energy storage systems or photovoltaic green energy systems, LS e-Mobility delivers the performance, safety and engineering support to keep projects moving forward.
| Features |  |  |  |  |  |
|---|---|---|---|---|---|
| Series | GER-10ST | GER-20ST | GER-40ST | GER-100ST | GER-150ST |
| Description | The GER-10ST DC Relay is a compact, single-pole, normally open high-voltage DC relay designed for dependable low-current switching in high-energy systems. Rated for up to 10 A at 500 VDC and typically driven by a 12 VDC control coil, it provides stable electrical performance with low contact voltage drop and efficient power consumption. Engineered primarily for pre-charge and auxiliary switching duties, the GER-10ST is well suited to electric vehicle platforms, battery energy storage systems (ESS), DC power converters, and industrial power electronics. Its robust insulation design and fast operate/release characteristics enable safe, repeatable control of capacitive loads, helping to limit inrush current, protect main contactors, and enhance overall system reliability. | The GER-20ST DC Relay is a compact, single-pole, normally open high-voltage DC relay designed for reliable switching of moderate DC loads in high-energy applications. Rated for up to 20 A at high DC voltage levels and available with a 12 VDC control coil, it provides stable contact performance, low power consumption, and consistent operation in electrically demanding environments. Developed for pre-charge and auxiliary control circuits, the GER-20ST is well suited to electric vehicles, battery energy storage systems (ESS), DC link management in inverters, and industrial power equipment. Its design supports controlled energisation of capacitive loads, helping to reduce inrush current, protect primary contactors, and improve overall system durability and safety. | The GER-40ST DC Relay is a compact, single-pole, normally open high-voltage DC relay designed for dependable switching of higher current loads in electrified power systems. Built for pre-charge and auxiliary control applications, it enables controlled energisation of DC circuits, helping to limit inrush current and protect primary contactors and sensitive power electronics. Well suited to electric vehicles, energy storage systems (ESS), UPS equipment, and industrial DC installations, the GER-40ST delivers robust, repeatable performance in demanding environments where safe and reliable high-voltage switching is required. | The GER‑100ST DC Relay is a robust, single‑pole, normally‑open high‑voltage DC relay engineered for dependable switching of higher current DC loads. Rated for up to 100 A at 500 VDC and available with 12 VDC or 24 VDC control coils, it delivers stable contact performance and reliable operation across demanding electrical systems. Designed for pre‑charge control and auxiliary switching in electrified power applications, the GER‑100ST is ideal for use in electric vehicles, battery energy storage systems (ESS), renewable power installations, UPS equipment, and other high‑voltage DC environments. Its SPST‑NO configuration and proven mechanical durability support safe, repeatable engagement of DC circuits. | The GER‑150ST DC Relay is a robust, compact, single‑pole high‑voltage DC relay designed for dependable switching of substantial DC loads. Rated for up to 150 A at 500 VDC with a 12 VDC control coil, it delivers reliable performance across demanding electrical systems. Engineered for pre‑charge and auxiliary control functions, the GER‑150ST is ideal for use in electric vehicles, energy storage systems (ESS), DC fast chargers, UPS equipment, and other high‑voltage DC applications. Its SPST‑NO contact configuration and durable construction support safe, repeatable engagement of DC circuits, helping to protect main contactors and downstream power electronics. |
| Supplier | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions |
| Contact Arrangement | SPST-NO | SPST-NO | SPST-NO | SPST-NO | SPST-NO |
| Load Polarity | Uni-directional | Uni-directional | Uni-directional | Uni-directional | Uni-directional |
| Rated Operating Voltage | 500VDC | 500VDC | 500VDC | 500VDC | 500VDC |
| Continuous Carry Current | 10A | 20A | 40A | 100A | 150A |
| Coil Type | Single Coil | Single Coil | Single Coil | Single Coil | Single Coil |
| Coil Voltage | 12VDC | 12VDC | 12VDC & 24VDC | 12VDC | 12VDC |
| AUX Contacts: | N-A | N-A | N-A | N-A | N-A |
| Power Consumption | 3.0W | 3.0W | 3.2W | 6.5W | 6.5W |
| Mechanical Life | ≥ 200,000 cycles | ≥ 200,000 cycles | ≥ 200,000 cycles | ≥ 200,000 cycles | ≥ 200,000 cycles |
| Mounting | Bottom | Bottom | Bottom | Bottom | Bottom & Side |
| Ambient Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
| Humidity | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. |
| Approx. Weight | 80g | 85g | 146g | 330g | 330g |
| Dimensions (W x D x H) mm | 56 x 28 x 44 mm | 56 x 28 x 44 mm | 67 x 35 x 47mm | 76 x 39 x 64 mm | 76 x 39 x 64 mm |
| Certification | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing |
| Datasheet | Download | Download | Download | Download | Download |
| Enquire | Enquire | Enquire | Enquire | Enquire | Enquire |
| Features |  |  |  |  | |
| Series | GER-200ST | GER-200ST SLIM | GER-250ST | GER-400ST | GER-M10ST |
| Description | The GER‑200ST DC Relay is a rugged, high‑voltage DC switching relay designed for dependable control of higher DC loads. Rated for 200 A continuous at up to 500 VDC with a 12 VDC control coil option, it delivers strong contact performance and reliable operation in demanding electrical environments. Engineered for pre‑charge and auxiliary switching duties, the GER‑200ST is ideal for use in electric vehicles, energy storage systems (ESS), DC power converters, and UPS equipment. Its SPST‑NO contact configuration and robust construction support safe, repeatable engagement of high‑current DC circuits, helping protect primary contactors and downstream power electronics. | The GER‑200ST SLIM DC Relay from LS Electric is a compact, single-pole, normally open high-voltage DC relay designed for reliable 200 A / 450 VDC switching in space constrained systems. Ideal for electric vehicles, battery energy storage systems (ESS), and DC power applications, it provides controlled pre‑charge and auxiliary switching, fast operate/release times, robust insulation, and durable mechanical performance all in a slimmer footprint than standard high current relays. | The GER‑250ST DC Relay from LS Electric is a high voltage, single‑pole normally open DC switching relay rated for 250 A continuous at up to 500 VDC. It delivers reliable controlled switching for moderate high current DC loads with low contact voltage drop and predictable operate/release performance. Designed for pre‑charge and auxiliary switching duties, the GER‑250ST is well suited to electric vehicles, battery energy storage systems (ESS), DC power converters, and UPS installations where dependable high‑current DC control is required. | The GER‑400ST DC Relay from LS Electric is a high current, single pole normall open high voltage DC switching relay rated for up to 400 A continuous at 500 VDC. It delivers robust, repeatable performance with fast operate/release times and low contact voltage drop for dependable control of moderate high‑power DC circuits. Designed for pre‑charge and auxiliary switching applications, the GER‑400ST is well suited to electric vehicles, energy storage systems (ESS), DC power converters, and UPS installations where safe, controlled engagement of high‑current DC loads is required. | The GER‑M10ST DC Relay is a compact, single pole, normally open, high voltage DC relay designed for controlled switching of moderate DC loads. Rated for 10 A at up to 600 VDC with SPST‑NO contact configuration and available with 12 VDC or 24 VDC coil options, it delivers dependable operation in electrically demanding environments. Engineered for pre‑charge and auxiliary DC control functions, the GER‑M10ST is well suited to electric vehicles, battery energy storage systems (ESS), UPS equipment, and other high‑voltage DC applications where reliable, repeatable circuit engagement is required. |
| Supplier | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions |
| Contact Arrangement | SPST-NO | SPST-NO | SPST-NO | SPST-NO | SPST-NO |
| Load Polarity | Uni-directional | Uni-directional | Uni-directional | Uni-directional | Uni-directional |
| Rated Operating Voltage | 500VDC | 450VDC | 500VDC | 500VDC | 1000VDC |
| Continuous Carry Current | 200A | 200A | 250A | 400A | 10A |
| Coil Type | Single Coil | Single Coil | Dual Coil | Dual Coil | Single Coil |
| Coil Voltage | 12VDC | 12VDC & 24VDC | 12VDC & 24VDC | 12VDC & 24VDC | 12VDC & 24VDC |
| AUX Contacts: | N-A | N-A | N-A | N-A | N-A |
| Power Consumption | 6.5W | 6.5W | 4.0W | 4.0W | 2.0W |
| Mechanical Life | ≥ 200,000 cycles | ≥ 200,000 cycles | ≥ 200,000 cycles | ≥ 200,000 cycles | ≥ 200,000 cycles |
| Mounting | Bottom & Side | Bottom | Bottom | Bottom | Bottom |
| Ambient Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
| Humidity | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. |
| Approx. Weight | 330g | 300g | 500g | 700g | 80g |
| Dimensions (W x D x H) mm | 76 x 39 x 64 mm | 93 x 28 x 80 mm | 89 x 45 x 87 mm | 100 x 58 x 91 mm | 56 x 28 x 44 mm |
| Certification | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing |
| Datasheet | Download | Download | Download | Download | Download |
| Enquire | Enquire | Enquire | Enquire | Enquire | Enquire |
| Features |  |  |  |  |  |
| Series | GER-M20ST | GER-M40ST | GER-M100ST | GER-M150ST | GER-M250ST |
| Description | The GER‑M20ST DC Relay from LS Electric is a compact, single pole, normally open, high voltage DC relay designed for controlled switching of moderate DC loads. It is rated for 20 A continuous at up to 600 VDC and features an SPST‑NO contact arrangement with 12 VDC or 24 VDC coil options for flexible control. Built for pre‑charge and auxiliary switching functions in high‑voltage DC systems, the GER‑M20ST is suitable for electric vehicles, battery energy storage systems (ESS), UPS equipment, and other DC power applications where dependable, repeatable control of DC circuits is required. | The GER‑M40ST DC Relay is a compact, single pole, normally open, high‑voltage DC switching relay rated for 40 A continuous at up to 1000 VDC, with 12 VDC or 24 VDC coil options and SPST‑NO contact configuration. Designed for controlled pre‑charge and auxiliary switching in high‑voltage DC systems, the GER‑M40ST is ideal for electric vehicles, battery energy storage systems (ESS), UPS equipment, and other DC power applications where dependable, repeatable engagement of DC circuits is required. | The GER‑M100ST DC Relay is a compact, single‑pole normally‑open high‑voltage DC switching relay rated for 100 A continuous at up to 1000 VDC, with 12 VDC or 24 VDC coil options and SPST‑NO contact configuration. It delivers reliable, repeatable performance with fast operate/release characteristics and robust insulation for demanding electrical environments. Designed for controlled pre‑charge and auxiliary switching in high‑voltage DC systems, the GER‑M100ST is well suited to electric vehicles, energy storage systems (ESS), DC power converters, UPS equipment, and other applications where safe, controlled engagement of moderate high‑current DC loads is required. | The GER‑M150ST DC Relay is a high voltage, single pole, normally‑open DC switching relay designed for reliable control of larger DC loads. It is rated for 150 A continuous at up to 1000 VDC, with SPST‑NO contacts and 12 VDC or 24 VDC coil options for flexible control. Optimised for pre‑charge and auxiliary switching functions in high voltage DC systems, the GER‑M150ST is ideal for electric vehicles, energy storage systems (ESS), UPS equipment, and other DC power applications where dependable, repeatable engagement of moderate high‑current DC circuits is required. | The GER‑M250ST DC Relay is a high voltage, single pole, normally‑open DC switching relay designed for robust auxiliary and pre‑charge control in demanding electrical systems. It is rated for 250 A continuous at up to 1000 VDC, with an SPST‑NO contact configuration and fast operate/release performance suitable for electrified power circuits. Optimised for use in electric vehicles, battery energy storage systems (ESS), DC power converters, and UPS installations, the GER‑M250ST delivers dependable, repeatable engagement of moderate high‑current DC loads while maintaining strong insulation resistance and mechanical durability across automotive and industrial environments. |
| Supplier | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions |
| Contact Arrangement | SPST-NO | SPST-NO | SPST-NO | SPST-NO | SPST-NO |
| Load Polarity | Uni-directional | Uni-directional | Uni-directional | Uni-directional | Uni-directional |
| Rated Operating Voltage | 1000VDC | 1000VDC | 1000VDC | 1000VDC | 1000VDC |
| Continuous Carry Current | 20A | 40A | 100A | 150A | 250A |
| Coil Type | Single Coil | Single Coil | Single Coil | Single Coil | Dual Coil (Internal Economizer) |
| Coil Voltage | 12VDC & 24VDC | 12VDC & 24VDC | 12VDC & 24VDC | 12VDC & 24VDC | 12VDC & 24VDC |
| AUX Contacts: | N-A | N-A | N-A | N-A | N-A |
| Power Consumption | 2.0W | 3.5W / 3.2W | 6.5W | 6.5W | 4.5W |
| Mechanical Life | ≥ 200,000 cycles | ≥ 200,000 cycles | ≥ 200,000 cycles | ≥ 200,000 cycles | ≥ 200,000 cycles |
| Mounting | Bottom | Bottom | Bottom | Bottom | Bottom |
| Ambient Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
| Humidity | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. |
| Approx. Weight | 85g | 145g | 330g | 330g | 500g |
| Dimensions (W x D x H) mm | 56 x 28 x 44 mm | 56 x 35 x 47 mm | 76 x 39 x 64 mm | 76 x 39 x 64 mm | 89 x 45 x 87 mm |
| Certification | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing |
| Datasheet | Download | Download | Download | Download | Download |
| Enquire | Enquire | Enquire | Enquire | Enquire | Enquire |
| Features |  |  |  |  |  |
| Series | GER-M250ST G2 | GER-M300ST G2 | GER-M400ST | GER-M400ST G2 | GER-M500ST-A |
| Description | The GER‑M250ST G2 DC Relay is a high voltage, single pole, normally‑open, DC switching relay designed for robust auxiliary and main switching in advanced electrified systems. It is rated for 250 A continuous at up to 1000 VDC, with SPST‑NO contacts, low contact voltage drop, and fast operate/release performance. Designed with enhanced durability and shock/vibration resistance, the GER‑M250ST G2 delivers dependable, repeatable switching across demanding environments such as electric vehicles, battery energy storage systems (ESS), DC power converters, and UPS installations where controlled engagement of high‑current DC circuits is required. | The GER‑M300ST G2 DC Relay is a high voltage, single pole, normally open DC switching relay designed for reliable control of substantial DC loads. It is rated for 300 A continuous at up to 1,000 VDC, with an SPST‑NO contact configuration, low contact voltage drop, and proven fast operate/release performance. Engineered for pre‑charge and auxiliary switching functions in high‑voltage DC systems, the GER‑M300ST G2 is ideal for electric vehicles, energy storage systems (ESS), DC power converters, UPS equipment, and other applications requiring dependable and repeatable engagement of moderate high‑current DC circuits. | The GER‑M400ST DC Relay is a high voltage, single pole, normally‑open DC switching relay designed for robust control of large DC loads. It is rated for 400 A continuous at up to 1000 VDC, with SPST‑NO contacts and fast operate/release performance suitable for demanding DC applications. Engineered for pre‑charge, auxiliary, and main switching functions in high‑voltage DC systems, the GER‑M400ST is ideal for electric vehicles, battery energy storage systems (ESS), DC power converters, UPS equipment, and other installations where dependable control of high‑current DC circuits is required. | The GER‑M400ST G2 DC Relay is a high voltage, single pole, normally‑open DC switching relay designed for dependable control of large DC loads. It is rated for 400 A continuous at up to 1000 VDC, with SPST‑NO contacts, low contact voltage drop, and fast operate/release performance ideal for demanding DC power systems. Engineered for pre‑charge, auxiliary, and DC link switching functions, the GER‑M400ST G2 is well suited to electric vehicles, energy storage systems (ESS), DC power converters, UPS equipment, and other applications requiring safe, repeatable engagement of high‑current DC circuits. | The GER‑M500ST‑A DC Relay is a high voltage, single pole, normally‑open automotive DC switching relay designed for robust control of large DC loads. It is rated for 500 A continuous at up to 1,000 VDC with SPST‑NO contacts and includes an auxiliary contact for enhanced monitoring or control functions. Engineered for primary pre‑charge, auxiliary switching, and high‑current DC control in demanding environments, the GER‑M500ST‑A is ideal for electric vehicles, energy storage systems (ESS), DC power converters, and UPS equipment. It delivers fast operate/release performance, strong insulation characteristics, and proven mechanical durability for safe, repeatable engagement of high‑power DC circuits. |
| Supplier | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions | LS e-Mobility Solutions |
| Contact Arrangement | SPST-NO | SPST-NO | SPST-NO | SPST-NO | SPST-NO |
| Load Polarity | Uni-directional | Bi-directional | Uni-directional | Bi-directional | Bi-directional |
| Rated Operating Voltage | 1000VDC | 1000VDC | 1000VDC | 1000VDC | 1000VDC |
| Continuous Carry Current | 250A | 300A | 400A | 400A | 500A |
| Coil Type | Single Coil | Single Coil | Dual Coil (Internal Economizer) | Dual Coil (Internal Economizer) | Single Coil |
| Coil Voltage | 12VDC & 24VDC | 12VDC & 24VDC | 12VDC & 24VDC | 12VDC | 12VDC |
| AUX Contacts: | N-A | N-A | N-A | N-A | Normally Open AUX |
| Power Consumption | 4.5W | 7.5W | 4.5W | 4.5W | |
| Mechanical Life | ≥ 200,000 cycles | ≥ 200,000 cycles | ≥ 200,000 cycles | ≥ 200,000 cycles | |
| Mounting | Bottom | Bottom & Side | Bottom | Bottom | Bottom |
| Ambient Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
| Humidity | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. | 5 ~ 95 % R.H. |
| Approx. Weight | 375g | 420g | 630g | 500g | |
| Dimensions (W x D x H) mm | 89.7 x 42.5 mm | 83 x 43 x 72 mm | 100 x 58 x 91 mm | 87 x 43 x 82 mm | 85 x 43 x 86mm |
| Certification | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing | Based on OEM Testing |
| Datasheet | Download | Download | Download | Download | Download |
| Enquire | Enquire | Enquire | Enquire | Enquire | Enquire |
