Product Introduction
The BSB C8P-400A high voltage DC contactor is a rugged, high-performance 400A high voltage DC contactor engineered for 1500VDC photovoltaic (PV) and energy storage applications. Featuring a ceramic-sealed, gas-filled contact chamber, it offers arc-free operation, ultra-low contact resistance, and high overload capacity. With built-in auxiliary contact and anti-short circuit protection, it is ideal for switching critical high-current DC circuits in large-scale renewable energy systems.
Product Features
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1500VDC Rated Voltage: Supports 400A continuous current for modern PV and ESS architectures.
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Gas-Filled Ceramic Sealing: Ensures high dielectric strength, arc suppression, and long-term insulation.
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Peak Breaking Capability: Up to 2000A at 1000VDC for one-time emergency shutdown.
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Overload Tolerance: Handles 600A for 30s, 900A for 10s, 2000A for 100ms.
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Built-in Auxiliary Contact: SPST-NO (1 Form A) for status feedback or control loops.
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Anti-Short Circuit Rated: 8000A @ 5ms with no explosion or fire.
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Dual-Coil Design: Energy-efficient operation with 36W pull-in and 6W holding power.
Typical Applications
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String disconnection in 1500V solar inverters
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Battery protection in large-scale BESS systems
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High-voltage switching in renewable energy containers
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Pre-charge control for industrial PV + ESS
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Smart grid DC disconnect and emergency isolation
Summary of Technical Parameters
| Parameter | Value |
|---|---|
| Rated Current | 350A (≥120 mm² wire) |
| Rated Voltage | 12–1500VDC |
| Max Breaking Current | 2000A @ 1000VDC (1 operation) |
| Contact Type | SPST-NO (1 Form A) |
| Auxiliary Contact | SPST-NO (1 Form A), 6VDC 0.1A |
| Contact Resistance | ≤0.3 mΩ @ 350A |
| Electrical Life | 30,000 ops @ 350A 20VDC (make) 5,000 ops @ 350A 50VDC (break) 1,000 ops @ 350A 1000VDC (break) 500 ops @ 350A 1500VDC (break) |
| Mechanical Life | 200,000 operations |
| Coil Voltage Options | 12VDC / 24VDC |
| Coil Resistance | 16Ω / 64Ω ±7% |
| Rated Power Consumption | 36W (pull-in), 6W (holding) |
| Auxiliary Contact Rating | 6VDC 0.1A |
| Dielectric Strength | 4000VAC (coil to contact, main to auxiliary) |
| Insulation Resistance | ≥1000 MΩ @ 1500VDC |
| Operate / Release Time | ≤30ms / ≤10ms |
| Bounce Time | ≤5ms |
| Vibration | 49 m/s² @ 10–55Hz |
| Shock | 98 m/s² functional, 490 m/s² destructive |
| Operating Temperature | -40°C to +85°C |
| Max Contact Temperature | 130°C continuous / 180°C short-time |
| Mounting Orientation | Vertical |
| Weight | Approx. 400g ±15g |
Dimensional Drawing & Wiring Diagram
FAQs About The BSBC8P-400A High Voltage DC Contactor
Q1: Is the C8P-400A high voltage DC contactor suitable for continuous operation at 1500VDC?
A1: Yes, it is rated for full 1500VDC operation with excellent electrical insulation and arc protection.
Q2: Does this contactor have polarity?
A2: The load and auxiliary contacts are non-polar, while the coil has polarity and must be connected correctly.
Q3: What are the overload and short-circuit ratings?
A3:
– 600A for 30s
– 900A for 10s
– 2000A for 100ms
– Anti-short circuit rating: 8000A @ 5ms with no fire/explosion
Precautions for Use
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Use flat and spring washers for secure installation.
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Torque requirements:
– Load terminal (M6): 6–8 N·m
– Mounting (M5): 3–4 N·m -
For inductive loads (L/R ≥1ms), install TVS or varistor to protect electrical life.
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For capacitive loads, use a pre-charge circuit and control closing voltage drop to ≤20V to prevent contact sticking.
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For models without economizer, avoid using diodes for coil suppression. Use TVS or varistor to ensure quick release.
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Do not exceed –40°C to +85°C operating temp. Internal gas pressure may rise and affect performance.
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Avoid strong magnetic fields, heat sources (e.g., fuses, shunts), and contact grease or debris.
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Do not reuse the contactor after drops or impact.
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Store in cool, dry, non-corrosive environments, out of direct sunlight. Shelf life: 12 months.