In today’s increasingly electrified world, protecting equipment from overvoltage surges caused by lightning or switching operations is essential. MUTAI’s Surge Protective Devices (SPD), including both Type 1 and Type 2, are designed to safeguard your electrical systems and ensure uninterrupted operation across a wide range of voltage environments.
Type 1 SPD – Heavy-Duty Protection for Direct Lightning Strikes
MUTAI’s T1 Series SPD is engineered to handle high-energy surges, particularly from direct lightning strikes. Designed for robust environments such as industrial sites, substations, and commercial power distribution systems.
Key Technical Highlights:
-
Rated Discharge Current (8/20μs): Up to 50kA
-
Max Discharge Current (8/20μs): Up to 200kA
-
Impulse Current (10/350μs): 15kA to 50kA
-
Voltage Protection Level: ≤2.0kV / ≤3.0kV
-
Response Time: ≤100ns
-
Operating Temperature: -40℃ to +80℃
-
Material: Flame-retardant nylon
-
Ingress Protection: IP20
-
Wiring Capacity: 6–35mm²
It provides exceptional energy absorption, fast response, and a high level of protection with wide operating voltage support (220/385V).
Type 2 SPD – Secondary Protection for Electrical Equipment
The T2 Series SPD offers downstream surge protection ideal for residential, commercial, and sensitive electronic equipment. Designed for indirect lightning effects and switching surges.
Key Technical Highlights:
-
Standard Discharge Current (8/20μs): 5kA – 60kA
-
Max Discharge Current: Up to 100kA
-
Voltage Protection Level (Up): As low as 1.5kV
-
Working Voltage Range: 275V–440V
-
Leakage Current: <20µA
-
Response Time: <25ns
This series ensures effective protection of low-voltage systems by clamping voltage surges before they reach sensitive loads.
Installation Requirements
-
Mounting: Standard 35mm DIN rail
-
Connection: High-quality copper wires, max total connection length <0.5m
-
Wire Range: Soft wire 2.5–16mm² / Hard wire 2.5–25mm²
-
Protection Coordination: Must work with miniature circuit breakers or fuses
-
Earth Connection: Ground wire section area ≥4mm²
Proper installation and grounding are critical to ensure optimal protection performance.
Post time: Jul-11-2025
