Product Introduction
The BSBC8V-200B is a high-reliability 200A DC contactor built for electric vehicle (EV) applications. Rated for up to 1000VDC, this contactor features a ceramic-sealed, gas-filled structure that ensures safe, arc-free switching even under demanding electrical loads. Its compact size, robust overload capacity, and exceptional dielectric strength make it ideal for use in EV battery disconnect units, inverter switching, and pre-charge circuits.
Product Features
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200A Continuous Load at 1000VDC – Supports EV battery and inverter circuits
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Ceramic Sealed Housing – Provides superior arc suppression and insulation
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High Short-Circuit Withstand – 1000A @ 800VDC (1 operation), 1500A @ 800VDC (1 op, 1000V version)
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Overload Capacity –
– 250A for 15min
– 320A for 5min
– 600A for 30s
– 900A for 10s -
Fast Switching Time – Operate ≤30ms, Release ≤10ms, Bounce ≤5ms
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Auxiliary Contact – Not included in this version
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Non-Polar Coil – Simplifies electrical integration
Typical Applications
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EV Battery Disconnect Units (BDU)
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Inverter-side Isolation Relays
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DC Bus and Pre-Charge Circuits
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High Voltage Load Switching
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Energy Storage System Switching (HEV/PHEV)
Summary of Technical Parameters
| Parameter | Value |
|---|---|
| Model | BSBC8V-200B |
| Rated Current | 200A (≥60 mm² cable) |
| Rated Voltage | 12–1000VDC |
| Max Breaking Current | 1000A @ 800VDC / 1500A @ 800VDC (1 op) |
| Electrical Life | – 200A @ 22.5VDC: 25,000 ops – 200A @ 450VDC: 1000 ops – 200A @ 750VDC: 500 ops – 200A @ 1000VDC: 800 ops – 1000A @ 300VDC: 1 op |
| Mechanical Life | 200,000 operations |
| Coil Voltage | 12VDC / 24VDC (single coil) |
| Coil Resistance | 24Ω (12V) / 96Ω (24V) |
| Power Consumption | Approx. 6W |
| Operate / Release Time | ≤30ms / ≤10ms |
| Bounce Time | ≤5ms |
| Insulation Resistance | ≥1000 MΩ @ 1000VDC |
| Dielectric Strength | 3000VAC (contact-contact), 4000VAC (contact-coil) |
| Vibration Resistance | 49 m/s² (10–500Hz) |
| Shock Resistance | 196 m/s² (functional), 490 m/s² (destructive) |
| Operating Temperature | -40°C to +85°C |
| Mounting Orientation | Vertical |
| Weight | Approx. 350g ±15g |
Dimensional Drawing & Wiring Diagram
FAQs About The BSBC8V-200A DC Contactor For EV
Q1: Can the 200a EV contactor operate continuously at 1000VDC?
A1: Yes. It supports continuous switching at up to 1000VDC with 200A load capacity.
Q2: Is there a version with auxiliary contacts available?
A2: This standard model does not include auxiliary contacts, but a version with 1 Form A auxiliary contact is available upon request.
Precautions for Use
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Use spring + flat washers during mounting; torque for M6: 5–6 N·m, M5: 3–4 N·m
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Avoid strong magnetic fields and high-temperature surroundings
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For inductive loads, always add surge suppressors
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For capacitive loads, ensure pre-charge and voltage suppression
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Do not use diodes across coil – use TVS for optimal performance
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Operating temperature must be kept within –40°C to +85°C
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Do not reuse the contactor after drop impact
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Store in a cool, dry place with no corrosive gas, away from direct sunlight