Metal Oxide Varistor 240V 1.8KA DISC 20mm 20K241U
The Metal Oxide Varistor 240V 1.8KA Disc 20mm 20K241U is a ZNR-series zinc-oxide surge absorber in a 20mm radial disc package, engineered to clamp transient overvoltages and protect sensitive electronics in mains and power-rail systems with fast response and robust energy handling capacity.
Features
- ZNR zinc-oxide varistor construction for reliable transient clamping performance.
- Nominal varistor voltage approximately 240V (typical specification range 216V–264V).
- Peak surge current capability 1.8kA for an 8/20µs waveform.
- Compact 20mm disc form factor with radial through-hole leads for PCB mounting.
- Bidirectional operation suitable for AC and DC applications.
- Fast response time for effective suppression of lightning and switching transients.
- Wide operating temperature range and stable ceramic construction for long service life.
- Conforms to international safety and performance standards and is RoHS compliant.
Specifications
| Parameter | Value |
|---|---|
| Nominal Varistor Voltage | 240V (216V–264V) |
| Maximum Surge Current(8/20µs) | 1.8kA |
| Clamping Voltage(8/20µs,typical) | 395V |
| Maximum Allowable AC Voltage (ACrms) | 150V |
| Disc Diameter | 20mm |
| Bidirectional | Yes |
| Operating Temperature Range | −40°Cto+85°C |
| Capacitance @ 1kHz(typ) | 380pF |
| Package Style | Radial through-hole |
Applications
- Surge and lightning protection for mains AC input stages.
- Transient suppression in solar inverters and PV combiner boxes.
- Protection of industrial control equipment and motor drives.
- Line protection for telecom, networking, and consumer electronics.
- EMI/RFI mitigation and transient suppression on distribution and power modules.
Package Contents
- 1x Metal Oxide Varistor 240V 1.8KA DISC 20mm 20K241U.
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