AC SPD Surge Protective Device 1–4 Pole 275V 385V 20–60KA
AC SPD Surge Protective Device 1–4 Pole 275V 385V 20–60KA
AC Surge Protective Device (SPD) – 1 to 4 Pole | 275V & 385V | 20KA to 60KA
Shield your home or commercial electrical system from lightning strikes and instantaneous voltage spikes with this robust AC Surge Protective Device (SPD). Designed to IEC/EN 61643-1 standards, this compact DIN-rail mounted surge arrester offers fast, dependable overvoltage clamping for single-phase and three-phase power distribution systems (AC 50/60Hz, 230/400V). Available in Class B, C, and D protection levels with 1, 2, 3, or 4-pole configurations to suit your specific installation needs.
Made in Mainland China.
Key Features
- Multiple Protection Classes: Choose Class C (XH-C40), Class B (XH-B60), or Class D (XH-D20) depending on your application and installation zone.
- Wide Pole Selection: Available in 1P, 2P, 3P, and 4P (3P+N) configurations to cover L-PE and N-PE protection modes.
- High Discharge Capacity: Nominal discharge current up to 30KA (8/20μs); maximum discharge current up to 60KA depending on model.
- Ultra-Fast Response: Response time <25ns ensures transient spikes are clamped almost instantaneously.
- Low Voltage Protection Level: Voltage protection level (Up) ≤1.8KV (Class C & D) and ≤2.2KV (Class B).
- Visual Status Indicator: Green = normal operation; Red = malfunction — easy at-a-glance monitoring without removing the unit.
- Flame-Retardant Outer Shell: Constructed from self-extinguishing, flame-retardant materials for added installation safety.
- Wide Operating Range: Functions reliably from -40°C to +80°C at relative humidity <95%, suitable for demanding environments.
- Max. Continuous Operating Voltage: Up to ~385VAC across all models.
- Leakage Current: ≤20μA — minimal interference with connected equipment.
Technical Specifications
| Parameter | XH-C40 (Class C) | XH-B60 (Class B) | XH-D20 (Class D) |
|---|---|---|---|
| Max. Continuous Operating Voltage (Uc) | ~385VAC | ~385VAC | ~385VAC |
| Nominal Discharge Current In (8/20μs) | 20KA | 30KA | 20KA |
| Max. Discharge Current Imax (8/20μs) | 40KA | 60KA | 10KA |
| Voltage Protection Level (Up) | ≤1.8KV | ≤2.2KV | ≤1.8KV |
| Response Time | <25ns | ||
| Leakage Current | ≤20μA | ||
| Operating Temperature | -40°C to +80°C | ||
| Relative Humidity | <95% | ||
| Protection Mode | L-PE, N-PE (1P, 2P, 3P, 3P+N) | ||
| Standard | IEC/EN 61643-1 | ||
| Outer Shell Material | Flame-retardant plastic | ||
Ideal Applications
- Residential homes and apartment distribution boards
- Commercial and light industrial electrical panels
- Single-phase and three-phase power control systems
- Protecting sensitive electronics, appliances, and equipment from transient overvoltage
- Areas prone to lightning activity or frequent grid-switching transients
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Frequently Asked Questions
Q: What is the difference between Class B, Class C, and Class D surge protective devices?
A: Class B (XH-B60) SPDs are designed for the main incoming service entrance and can handle the highest surge energies (up to 60KA max discharge). Class C (XH-C40) devices are suited for sub-distribution boards, handling surges up to 40KA. Class D (XH-D20) SPDs are installed close to sensitive equipment at the point of use, providing fine-level protection at up to 10KA. Using all three in sequence creates a layered overvoltage protection strategy for maximum equipment safety.
Q: Can this SPD be used on both single-phase and three-phase systems?
A: Yes. This surge protective device supports electric ratings of 230V (single-phase) and 400V (three-phase) at AC 50/60Hz. Simply select the appropriate pole count — 1P or 2P for single-phase applications, and 3P or 4P (3P+N) for three-phase power systems.
Q: How do I know if the SPD has activated or needs replacing?
A: The built-in visual status indicator makes it easy. A green indicator light means the device is functioning normally. A red indicator light signals a malfunction or end-of-life condition, letting you know it's time to replace the unit for continued overvoltage protection.
Q: Does this surge protective device fit standard DIN rail panels?
A: Yes. This compact SPD is designed for standard DIN rail installation, making it easy to integrate into residential, commercial, or light industrial electrical distribution panels without any special mounting hardware.