Product Introduction
The BSB C8P-250A high voltage DC contactor is a high-capacity 250A high voltage DC contactor designed for use in photovoltaic (PV) and energy storage systems (ESS). Built with a ceramic-sealed structure and gas-insulated chamber, it delivers exceptional performance under harsh operating conditions. With a continuous operating voltage of up to 1500VDC and a peak breaking capability of 2000A, the C8P-250A is ideal for critical disconnection applications where electrical safety and reliability are paramount.
Product Features
-
1500VDC High Voltage Capability: Supports 250A continuous load in PV and ESS systems.
-
Gas-Sealed Ceramic Chamber: Offers arc-free switching, dust protection, and long service life.
-
Short-Term Overload Tolerance: 600A for 30s, 900A for 10s, 2000A for 100ms.
-
Fast Response Time: Operate time ≤30ms, release time ≤10ms, bounce ≤5ms.
-
Auxiliary Contact Option: Built-in 1 Form A auxiliary contact for feedback and safety loops.
-
Wide Environmental Range: Operates from -40°C to +85°C with full sealing and vibration/shock resistance.
-
RoHS Compliant: Eco-safe and meets global compliance standards.
Typical Applications
-
High-voltage combiner box disconnection
-
1500V PV inverter string protection
-
Battery energy storage system (BESS) circuit switching
-
Solar hybrid systems with smart battery interfaces
-
Industrial-grade DC circuit protection for rail/telecom
Summary of Technical Parameters
| Parameter | Value |
|---|---|
| Rated Current | 250A (recommended cable ≥80 mm²) |
| Rated Voltage | 12–1500VDC |
| Max Breaking Current | 2000A @ 1000VDC (1 operation) |
| Contact Type | SPST-NO (1 Form A) |
| Contact Resistance | ≤0.3 mΩ @ 250A |
| Electrical Life | 100,000 ops @ 250A 20VDC (make only) 15,000 ops @ 250A 50VDC (break only) 1,000 ops @ 250A 1000VDC (break only) 1,000 ops @ 250A 1500VDC (break only) 1 op @ 1000A 1500VDC (break only) |
| Mechanical Life | 200,000 operations |
| Coil Voltage | 12VDC / 24VDC (dual-coil structure) |
| Coil Power Consumption | 36W (pull-in), 6W (holding) |
| Auxiliary Contact | 1 Form A (SPST-NO), 6VDC / 0.1A |
| Auxiliary Contact Resistance | ≤120 mΩ |
| Dielectric Strength | 4000VAC (coil to contact, contact to case) |
| Insulation Resistance | ≥1000 MΩ @ 1500VDC |
| Operate / Release Time | ≤30 ms / ≤10 ms |
| Bounce Time | ≤5 ms |
| Operating Temperature | –40°C to +85°C |
| Max Contact Temperature | 130°C continuous / 180°C short-time |
| Vibration Resistance | 49 m/s² (10–55Hz) |
| Shock Resistance | Functional: 98 m/s² Destructive: 490 m/s² |
| Mounting Orientation | Vertical |
| Weight | Approx. 400g ±15g |
Dimensional Drawing & Wiring Diagram
FAQs About The BSBC8P-250A High Voltage DC Contactor
Q1: Can the C8P-250A high voltage DC contactor operate at 1500VDC continuously?
A1: Yes. It is rated for continuous operation up to 1500VDC with safe insulation and arc control.
Q2: Is this contactor suitable for use in BESS and PV hybrid systems?
A2: Absolutely. It supports both energy storage system disconnection and solar inverter protection.
Q3: Does the C8P-250A have polarity requirements?
A3: The load and auxiliary terminals are non-polar, while the coil is polarity-sensitive. Please observe correct coil wiring.
Precautions for Use
Installation and Mounting
-
Use flat and spring washers to prevent terminal loosening.
-
Recommended torque:
– Load terminals (M6 bolts): 6–8 N·m
– Body mounting (M5 screws): 3–4 N·m -
Ensure copper bar flatness and thickness match recommended specs to avoid thread stripping.
Electrical Protection
-
For inductive loads (L/R ≥ 1ms), install parallel surge suppressors (TVS or varistors) to extend service life.
-
For capacitive loads, implement pre-charge control, and keep closing voltage difference ≤20V to prevent contact welding.
-
For non-economizer models, avoid using diodes for coil protection—use TVS or varistor instead.
Thermal & Environmental Guidelines
-
The contactor’s internal chamber is gas-filled. Do not exceed -40°C to +85°C range, or internal insulation may degrade.
-
Avoid installing near fuses, resistors, or other heat-generating components.
-
Prevent installation near strong magnetic fields, which may affect electrical performance.
Clean Handling
-
Keep terminal pads free of grease or debris to avoid abnormal heat rise.
-
Do not reuse the contactor if it has been dropped.
Storage
-
Store at –40°C to +85°C, 5%–85% RH.
-
Keep away from corrosive gas and direct sunlight.
-
Shelf life: 12 months in original packaging.