Surge Protection Module

Product Specifications

Technical details and manufacturing context for Surge Protection Module

Definition

This surge protection module is a component used in electrical equipment manufacturing, specifically designed to limit transient voltage spikes in electrical circuits. It is typically integrated into power strips, outlets, or power distribution units to safeguard connected electronic devices from damage caused by power surges or lightning-induced transients. The module operates by detecting overvoltage conditions and diverting excess energy to the ground line, thereby clamping the voltage to a safe level.

The module employs metal oxide varistors (MOVs), gas discharge tubes (GDTs), or transient voltage suppression (TVS) diodes as its core protective elements. Under normal operating voltage, these components exhibit high resistance, but when the voltage exceeds a safe threshold, they become conductive and shunt the excess energy to ground. This action limits the voltage across the protected circuit to a level that the connected equipment can withstand.

Key parameters for this module include a nominal voltage of 230 V AC (per IEC 60038), a maximum continuous operating voltage of 275 V AC, a nominal discharge current of 20 kA (8/20 µs waveform), and a maximum discharge current of 40 kA (per IEC 61643-11). The voltage protection level is ≤1.5 kV at nominal discharge current, and the response time is ≤25 ns. The module operates within a temperature range of -40°C to 85°C, has a degree of protection of IP20, and is rated for 50/60 Hz systems. Leakage current at maximum continuous operating voltage is ≤1 mA. The dimensions are 36×90×65 mm (W×H×D) and it weighs 150 g, fitting standard DIN rail enclosures (DIN 43880).

These specifications serve as reference ranges for directory purposes; actual values must be confirmed with the legal manufacturer or supplier for the specific model and application. The module is not waterproof and should be installed in a dry, indoor environment. Regular inspection for signs of overheating or degradation is recommended, and the module should be replaced after a significant surge event or if it fails to provide protection.

Working Principle

The surge protection module uses nonlinear components such as metal oxide varistors (MOVs), gas discharge tubes (GDTs), or transient voltage suppression (TVS) diodes. Under normal voltage, these components have high impedance, allowing normal circuit operation. When a transient overvoltage occurs, the impedance drops sharply, conducting excess current to the ground line. This clamps the voltage to a safe level, protecting downstream equipment. The response time is typically ≤25 ns, ensuring rapid diversion of surge energy.

Common Materials

Metal Oxide Varistor (MOV), Printed Circuit Board (PCB), Plastic Housing, Copper Conductors

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Voltage	230 V AC	Standard mains voltage for single-phase systemsIEC 60038
Maximum Continuous Operating Voltage	275 V AC	Above this, the module may overheatIEC 61643-11
Nominal Discharge Current	20 kA	8/20 µs waveform, per IECIEC 61643-11
Maximum Discharge Current	40 kA	One-time surge capabilityIEC 61643-11
Voltage Protection Level	≤1.5 kV	At In, must be lower than equipment withstandIEC 61643-11
Response Time	≤25 ns	Faster than typical MOVsIEC 61643-11
Operating Temperature Range	-40–85 °C	Exceeding may degrade MOV clampingIEC 60068-2-1
Degree of Protection	IP20	Finger-safe, not waterproofIEC 60529
Rated Frequency	50/60 Hz	Compatible with global mainsIEC 60038
Leakage Current	≤1 mA	At Uc, ensures low standby power lossIEC 61643-11
Dimensions (W×H×D)	36×90×65 mm	Fits standard DIN rail enclosuresDIN 43880
Weight	150 g	Lightweight for easy mounting

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Metal Oxide Varistor (MOV) Part
Primary voltage-clamping element that becomes conductive during overvoltage events

Material: Zinc oxide with metal electrodes
Thermal Fuse Part
Disconnects the MOV from the circuit if it overheats from repeated surges

Material: Fusible alloy
Indicator LED Part
Visual status indicator showing protection circuit functionality

Material: Semiconductor (LED chip), plastic lens
Gas Discharge Tube Optional
Handles the high-energy part of a surge; used ahead of or instead of the MOV.
TVS Diode Optional
Clamps fast, low-energy transients on signal or low-voltage lines.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Power Strip/Outlet

View system integration details

Manufacturers of Surge Protection Module

Manufacturer profiles associated with Surge Protection Module.

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Frequently Asked Questions

What is the nominal voltage of this surge protection module?

The nominal voltage is 230 V AC for single-phase systems, per IEC 60038. This is the standard mains voltage for which the module is designed.

What is the maximum discharge current?

The maximum discharge current is 40 kA (one-time surge capability), per IEC 61643-11. The nominal discharge current is 20 kA with an 8/20 µs waveform.

What is the response time?

The response time is ≤25 ns, which is faster than typical MOVs, ensuring rapid clamping of transient voltages.

What is the degree of protection?

The degree of protection is IP20, meaning it is finger-safe but not waterproof. It should be installed in a dry indoor environment.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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current:	Up to 20kA surge current
voltage:	Up to 1000V AC/DC
temperature:	-40°C to +85°C
response time:	<1 nanosecond

Product Specifications

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