Product Introduction
The BSB C8P-300A high voltage DC contactor is a high-performance 300A high voltage DC contactor designed for use in advanced photovoltaic (PV) and energy storage systems (ESS). Featuring a ceramic-sealed, gas-filled design, it ensures reliable arc suppression and extended endurance in high-voltage, high-current switching environments. With a 1500VDC voltage rating, integrated auxiliary contact, and short-term overload capacity up to 2000A, the C8P-300A is ideal for demanding grid-scale and commercial energy applications.
Product Features
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Rated for 1500VDC: Meets the voltage needs of modern PV and ESS applications.
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300A Continuous Load: Supports heavy current applications with excellent thermal performance.
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Ceramic Gas-Sealed Design: Ensures arc-free operation, dust resistance, and long electrical life.
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Built-in Auxiliary Contact: 1 Form A for real-time switching feedback.
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Short-Term Overload Ready:
– 450A for 300s
– 600A for 120s
– 900A for 30s
– 2000A for 100ms -
Fast Switching: Operate time ≤30ms, release time ≤10ms, bounce ≤5ms.
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RoHS Compliant
Typical Applications
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1500V photovoltaic inverter disconnect
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BESS container-level main circuit switching
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String-level circuit protection in hybrid PV + storage systems
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High-current solar combiner box switching
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Auxiliary relay control in industrial DC circuits
Summary of Technical Parameters
| Parameter | Value |
|---|---|
| Rated Current | 300A (≥100 mm² wire) |
| Rated Voltage | 12–1500VDC |
| Max Breaking Current | 2000A @ 1000VDC (1 op) |
| Contact Type | SPST-NO (1 Form A) |
| Auxiliary Contact | SPST-NO (1 Form A), 6VDC 0.1A |
| Contact Resistance | ≤0.3 mΩ @ 300A |
| Electrical Life | – 20VDC making: 75,000 ops – 50VDC breaking: 15,000 ops – 1000VDC breaking: 1,000 ops – 1500VDC breaking: 500 ops – 1500VDC breaking @ 1000A: 1 op |
| Mechanical Life | 200,000 operations |
| Coil Voltage | 12VDC / 24VDC (dual coil) |
| Power Consumption | 36W (pull-in), 6W (holding) |
| Insulation Resistance | ≥1000 MΩ @ 1500VDC |
| Dielectric Strength | 4000VAC (main, coil, auxiliary paths) |
| Operate / Release Time | ≤30ms / ≤10ms |
| Bounce Time | ≤5ms |
| Vibration | 49 m/s² @ 10–55Hz |
| Shock | 98 m/s² functional / 490 m/s² destructive |
| Max Contact Temp | 130°C continuous / 180°C short-time |
| Mounting | Vertical |
| Weight | Approx. 400g ±15g |
Dimensional Drawing & Wiring Diagram
FAQs About The BSBC8P-300A High Voltage DC Contactor
Q1: What is the rated voltage and current of the C8P-300A high voltage DC contactor?
A1: It is rated for 300A continuous current and up to 1500VDC voltage.
Q2: Does the product include an auxiliary contact?
A2: Yes, it comes with 1 Form A (SPST-NO) auxiliary contact for real-time status feedback.
Q3: Is the coil polarized?
A3: Yes, the coil has polarity and must be connected correctly. The main load and auxiliary terminals are non-polar.
Q4: What is the overload tolerance of this contactor?
A4:
– 450A for 300s
– 600A for 120s
– 900A for 30s
– 2000A for 100ms
Q5: Can the C8P-300A be used in outdoor or harsh environments?
A5: Yes, its ceramic sealed structure provides excellent resistance to moisture, dust, and gas contamination.
Precautions for Use
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Use flat and spring washers during installation to avoid loosening.
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Torque recommendations:
– Load terminals (M6 bolts): 6–8 N·m
– Mounting screws (M5): 3–4 N·m -
Avoid strong magnetic fields (e.g., transformers, magnets), which may affect performance.
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Keep contact terminals clean. Do not allow grease or foreign matter on terminal pads.
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Do not reuse contactor if dropped.
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For inductive loads (L/R ≥1ms), install TVS or varistor in parallel to protect contact life.
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For capacitive loads, use a pre-charge circuit and limit closing voltage diff ≤20V.
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Do not use diodes across coil; use TVS/varistor instead for proper release behavior.
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Operating environment: –40°C to +85°C, 5–85% RH, no condensation or icing.
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Storage: 12 months, avoid corrosive gas and direct sunlight.