Product Introduction
The BSBC8V-100B is a 100A DC contactor engineered specifically for electric vehicle (EV) applications, designed to handle up to 1000VDC with ceramic-sealed reliability. With robust arc suppression and gas-filled insulation, this contactor ensures stable performance and high safety standards for EV battery disconnect units (BDUs), inverter circuits, and DC bus applications.
Product Features
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100A Continuous Current, 1000VDC Rated – Reliable high-current switching for EV applications.
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Ceramic Sealed Structure – Offers superior insulation, arc suppression, and protection against dust and moisture.
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Short Circuit Tolerance – Up to 1000A breaking at 300VDC, ideal for high-power EV protection.
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Fast Switching Performance – Operate time ≤30ms, release time ≤10ms, bounce ≤5ms.
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Auxiliary Contact Optional – For feedback control (additional customization available).
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Overload Tolerance –
– 130A for 8 hours
– 240A for 30 minutes
– 600A for 1 second
Typical Applications
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Battery Disconnect Units (BDU) for EV battery systems
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Inverter isolation for traction motors and DC bus systems
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Pre-charge control and discharge circuit protection
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Fast charging protection and battery pack switching
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High-voltage load isolation in hybrid and fully electric vehicles
Summary of Technical Parameters
| Parameter | Value |
|---|---|
| Model | BSBC8V-100B |
| Rated Current | 100A (≥35 mm² wire) |
| Rated Voltage | 12–1000VDC |
| Max Breaking Current | 1000A @ 300VDC (1 op) |
| Electrical Life | – 100A @ 22.5VDC (making): 25,000 ops – 100A @ 450VDC (breaking): 1,000 ops – 100A @ 1000VDC (breaking): 1,000 ops – 1000A @ 300VDC (breaking): 1 op |
| Mechanical Life | 200,000 operations |
| Coil Voltage Options | 12VDC / 24VDC |
| Coil Resistance | 24Ω (12V) / 96Ω (24V) |
| Power Consumption | Approx. 6W |
| Operate / Release Time | ≤30ms / ≤10ms |
| Bounce Time | ≤5ms |
| Contact Resistance | ≤0.5 mΩ |
| Insulation Resistance | ≥1000 MΩ @ 1000VDC |
| Dielectric Strength | 3000VAC (coil-to-contact and contacts) |
| Shock Resistance | 196 m/s² (off), 588 m/s² (on) |
| Vibration | 49 m/s² (10–55Hz) |
| Mounting | Vertical |
| Weight | Approx. 350g ±15g |
Dimensional Drawing & Wiring Diagram
FAQs About The BSBC8V-100A DC Contactor For EV
Q1: Can the BSBC8V-100B handle continuous 1000VDC operation?
A1: Yes, it is rated for continuous 1000VDC operation with 100A current handling capacity.
Q2: Does this model include an auxiliary contact?
A2: The standard BSBC8V-100B does not include an auxiliary contact, but custom versions can be provided with auxiliary contacts.
Q3: How does the contactor handle inductive or capacitive loads?
A3:
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For inductive loads (L/R ≥ 1ms), install TVS or varistors for surge protection.
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For capacitive loads, use a pre-charge circuit to limit voltage differences and prevent contact welding.
Precautions for Use
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Installation:
– Use flat washers and spring washers to prevent loosening.
– Recommended torque for M6 load terminals: 5–6 N·m; M5 mounting screws: 3–4 N·m
– Ensure proper copper bar thickness to avoid thread damage. -
Inductive Load Protection:
– Use TVS diodes or varistors for inductive loads (L/R ≥1ms).
– For capacitive loads, use pre-charge circuits to prevent contact welding. -
Coil Protection:
– For non-economizer models, install TVS or varistor to suppress coil reverse EMF.
– Do not use diodes, as they increase release time and reduce performance. -
Environmental Considerations:
– Operating temperature: –40°C to +85°C
– Store in a dry environment with 5%–85% RH to avoid condensation and corrosive gases. -
Handling and Storage:
– Do not reuse the contactor if dropped or damaged.
– Store in original packaging, and protect from direct sunlight.