DC Contactor Relay 50A/100A/250A 12–900V Normally Open | EV4025A
DC Contactor Relay 50A/100A/250A 12–900V Normally Open | EV4025A
EV4005A / EV4010A / EV4025A High Voltage DC Contactor Relay
Meet the EV4005A, EV4010A, and EV4025A series of high-voltage DC contactors — engineered for demanding automotive, EV, energy storage, and industrial switching applications. Available in 50A, 100A, and 250A ratings with a wide operating voltage range of 12–900VDC, these relays deliver reliable, long-lasting performance in sealed, compact form factors.
Key Features
- Epoxy Seal Construction: Fully sealed coils and contacts resist oxidation and contamination, ensuring consistent performance even in harsh environments.
- Wide Voltage Range: Rated for 12–900VDC operation, compatible with a broad spectrum of EV, solar, battery, and industrial DC systems.
- Three Current Ratings: Choose 50A (EV4005A), 100A (EV4010A), or 250A (EV4025A) to match your exact circuit requirements.
- 10× Overload Disconnect Capability: Built to handle surge currents up to 10 times the rated load for added protection and safety.
- Built-In Coil Energy Saver: Reduces coil power consumption during hold state, minimizing heat generation and extending component life.
- Optional Auxiliary Contact: Enables easy real-time monitoring of main contact status for advanced system integration.
- 300,000-Cycle Mechanical Life: Designed for high-duty-cycle applications with exceptional longevity.
Technical Specifications
| Parameter | Details |
|---|---|
| Models | EV4005A / EV4010A / EV4025A |
| Rated Breaking Current | 50A / 100A / 250A |
| Operating Voltage | 12–900VDC |
| Contact Form | Normally Open (Bridge Type) |
| Auxiliary Contact | Normally Open (Optional) |
| Mechanical Life | 300,000 cycles |
| Sealing | Epoxy Sealed |
| Country of Origin | Made in China |
What's in the Box
- 1× DC Contactor Relay (model selected at purchase)
Important Notes
- Due to screen calibration differences, actual product color may vary slightly from images.
- Please allow a tolerance of 1mm–1cm due to manual measurement.
Resources & Safety Standards
For guidance on safe electrical installation and wiring practices, refer to the OSHA Electrical Safety Standards. Proper installation by a qualified electrician is always recommended for high-voltage DC systems.
Frequently Asked Questions
Q: What is the difference between the EV4005A, EV4010A, and EV4025A DC contactors?
A: The models differ in their rated breaking current: the EV4005A is rated for 50A, the EV4010A for 100A, and the EV4025A for 250A. All three share the same 12–900VDC operating voltage range, epoxy seal construction, and normally open contact configuration. Choose the model that matches your circuit's maximum current demands.
Q: Can this DC contactor relay be used in electric vehicle (EV) battery systems?
A: Yes. These relays are specifically designed for high-voltage DC applications including EV battery management, solar energy storage, and automotive DC systems. The wide 12–900VDC range and high current ratings make them well-suited for EV main circuit switching, battery isolation, and pre-charge circuit applications.
Q: What does the built-in coil energy saver do?
A: Once the relay is energized and the contacts are closed, the built-in coil energy saver automatically reduces the holding current to the coil. This lowers power consumption, reduces heat buildup around the coil, and extends the overall service life of the contactor.
Q: Is the auxiliary contact included with the relay?
A: The auxiliary contact is an optional feature. Check the product variant or listing details to confirm whether the version you are purchasing includes it. The auxiliary contact (normally open type) provides a secondary signal output for monitoring the status of the main contact in your control system.