The Metal Oxide Varistor 240V 6.5KA DISC 20mm 20D241K is a high-performance surge protection device using zinc-oxide ceramic technology. Designed for fast and reliable clamping of voltage transients (e.g., lightning, switching spikes), this radial, 20 mm disc component features a nominal varistor voltage of 240 V and can safely conduct peak surges up to 6.5 kA (8/20 µs). Its bidirectional design and compact form factor make it ideal for protecting power supplies, telecom equipment, and consumer electronics.
Features
- High-voltage surge protection up to 6.5 kA (8/20 µs).
- Nominal varistor voltage of 240 V with ±10 % tolerance (216 V–264 V range).
- Compact 20 mm disc design in through-hole format.
- Bidirectional operation for AC and DC transient clamping.
- Fast response time for efficient suppression of voltage spikes.
- RoHS compliant and UL-1449 recognized for safety.
- High energy absorption capability for reliable transient protection.
Specifications
| Parameter |
Value |
| Varistor Voltage (Typ.) |
240 V |
| Varistor Voltage (Min–Max) |
216 V – 264 V |
| Maximum AC Voltage (VRMS) |
150 V |
| Maximum DC Voltage (VDC) |
200 V |
| Peak Surge Current (8/20 µs) |
6.5 kA |
| Clamping Voltage (Typ.) |
395 V |
| Energy Rating |
72 J |
| Capacitance @1 kHz |
1500 pF |
| Operating Temp. Range |
–40 °C to +105 °C |
| Package Type |
Disc, 20 mm through-hole |

Applications
- Surge suppression in power supply circuits and line voltage protection.
- Transient voltage protection in telecom and networking equipment.
- EMI/RFI protection in consumer appliances and white goods.
- Over-voltage and lightning protection in industrial electronics.
Package Contents
- 1x Metal Oxide Varistor 240V 6.5 kA DISC 20 mm 20D241K.
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