Product Introduction
The BSB C8P-30A high voltage DC contactor is a 30A high voltage DC contactor designed for photovoltaic (PV) and energy storage systems (ESS). With ceramic-sealed construction, this contactor is ideal for use in high-voltage applications requiring reliable, long-lasting performance. Rated for up to 1500VDC, the C8P-30A is perfect for auxiliary switching, battery management, and load disconnection circuits, providing efficient power distribution with a low contact resistance of ≤5 mΩ.
Product Features
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High Voltage Capability: Supports up to 1500VDC, making it suitable for large-scale PV and ESS applications.
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Ceramic Sealed Design: Offers exceptional insulation and long-term stability in demanding environmental conditions.
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Current Rating: Rated for 30A continuous current and 200A max breaking capacity at 1000VDC.
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Quick Switching: Operate time ≤30ms, release time ≤10ms, with bounce time ≤5ms for reliable switching.
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Mounting Options: Available with QC or PCB termination and optional mounting boss.
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Wide Temperature Range: Operates between -40°C to +85°C, suitable for extreme environmental conditions.
Typical Applications
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PV Inverter Auxiliary Switching
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Energy Storage System (ESS) BMS Protection
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Solar String Protection Circuits
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Battery Disconnects for Photovoltaic Arrays
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Low-Voltage Power Distribution in ESS
Summary of Technical Parameters
| Parameter | Value |
|---|---|
| Rated Current | 30A (≥6 mm² wire) |
| Working Voltage Range | 12–1500VDC |
| Max Breaking Current | 200A @ 1000VDC (1 op) |
| Contact Type | SPST-NO (1 Form A) |
| Contact Resistance | ≤5 mΩ @ 30A |
| Operate Time | ≤30 ms |
| Release Time | ≤10 ms |
| Bounce Time | ≤5 ms |
| Electrical Life | 15,000 ops @ 1000V 10A |
| 20,000 ops @ 1500V 20A (making only) | |
| Mechanical Life | 200,000 ops |
| Coil Voltage | 12VDC or 24VDC |
| Coil Resistance | 56Ω / 224Ω (±7%) |
| Rated Power Consumption | Approx. 2.6W |
| Dielectric Strength | 3000VAC between contacts |
| 4000VAC between coil and contacts | |
| Insulation Resistance | ≥1000 MΩ @ 1000VDC |
| Vibration Resistance | 49 m/s² (10–55Hz) |
| Shock Resistance | Functional: 98 m/s², Destructive: 490 m/s² |
| Operating Temperature | -40°C to +85°C |
| Mounting Orientation | Vertical |
| Weight | Approx. 156g ±15g |
Dimensional Drawing & Wiring Diagram
Plug-in type with mounting feet
Welded type
Wiring Diagram
FAQs About The BSBC8P-30A High Voltage DC Contactor
Q1: Can this relay be used for PV string disconnects?
A1: Yes, the C8P-30A is ideal for solar string protection and auxiliary switching in photovoltaic arrays, supporting up to 1500VDC.
Q2: Is the C8P-30A high voltage DC contactor suitable for continuous high-current switching?
A2: Yes, with a continuous rating of 30A, it is designed for reliable, long-lasting operation in photovoltaic and energy storage systems.
Q3: What is the maximum current it can handle during operation?
A3: The C8P-30A can handle up to 200A in a single operation, ensuring safe and efficient operation in high-power applications.
Q4: How many installation methods are available for this product?
A4: This product offers plug-in and welded installation methods.
Precautions for Use
Please observe the following precautions when using the C8P-30A high voltage DC contactor to ensure reliable operation and avoid damage:
Mechanical Installation
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Use flat washers and spring washers when installing to prevent loosening.
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When using M5 screws, tighten them with a torque of 3N·m~4N·m to ensure the washer thickness and strength are sufficient; otherwise, it may cause deformation and damage to the casing.
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Maximum allowable pulling force for terminals:
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Load terminals: 49N
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Coil terminals: 49N
Exceeding these limits may cause damage to the terminals.
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Wiring Guidelines
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Use wires with a cross-sectional area ≥6 mm² for connections. Improper wire size may cause abnormal heating at the terminals.
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Polarity: The contactor is designed for non-polarity wiring for both the coil and load terminals, simplifying installation.
Soldering Parameters
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Manual Soldering: 380±20°C for 3–5 seconds.
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Wave Soldering: 265±5°C for 3–5 seconds.
Surge Protection & Capacitive Loads
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When using the contactor in inductive loads (L/R ≥1ms), surge absorption measures (such as varistors or TVS diodes) should be implemented in parallel to protect the contactor and prevent performance degradation.
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For capacitive loads, ensure to implement pre-charge circuits and control the closing pressure difference to ≤20V to prevent contact fusion.
Environmental Conditions
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The contactor should not be exposed to corrosive gases or direct sunlight during storage.
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Maximum allowable temperature for contact:
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130°C for continuous operation
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180°C for short-time operation.
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Storage temperature: -40°C to +85°C with humidity of 5% to 85% RH.
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Operational temperature range: -40°C to +85°C.
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Storage duration: 12 months (original packaging).
Usage in Harsh Environments
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Avoid installing the contactor near strong magnetic fields (e.g., transformers, magnets), as this can affect the contactor’s electrical and switching performance.
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Do not install near heating objects (e.g., fuses, resistors), as this could cause overheating at the contact ends.
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Grease or foreign matter should not be attached to the terminal leads. Ensure connections are clean and use only the recommended wire sizes to avoid overheating.
Post-Fall Considerations
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If the contactor falls, it should not be used again due to potential internal damage, even if external damage is not visible.