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JVR10S821K87P50

820V MOV varistor, 10mm disc, 510VAC/670VDC, ±10%, UL/VDE approved, radial lead

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Manufacturer Part：

JVR10S821K87P50

Package：

10mm disc, radial lead, 7.5mm pitch

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Description

Product Overview

The JVR10S821K87P50 is a metal oxide varistor (MOV) from Joyin (JOYIN CO., LTD) designed for transient voltage surge suppression. With a nominal varistor voltage of 820 V at 1 mA, a 10 mm disc diameter, and a clamping voltage rating suitable for 510 V AC / 670 V DC maximum operating voltage, this device protects electronic circuits from overvoltage transients in power supplies, appliances, and industrial equipment.

Key Specifications

Varistor Voltage (V1mA) 820 V nominal (±10%)
Max Operating Voltage (AC) 510 Vrms
Max Operating Voltage (DC) 670 V
Max Clamping Voltage ~1350 V @ surge current
Disc Diameter 10 mm
Withstanding Surge Current (8/20 µs) ~1250 A
Energy (10/1000 µs) ~20 J
Operating Temperature -40°C to 85°C
Lead Style Vertical kink, 7.5 mm lead pitch
Tolerance K = ±10%

Features

  • 10 mm disc diameter for high energy absorption capability
  • Broad operating voltage range for 510 VAC / 670 VDC applications
  • Fast response time (<25 ns) for effective transient suppression
  • UL 1449 4th edition and VDE recognized
  • RoHS compliant and halogen-free
  • Symmetric V-I characteristics (bidirectional, no polarity)

Applications

  • Power supply transient voltage protection
  • Home appliance surge protection
  • Industrial equipment overvoltage suppression
  • Telecom power line surge protection
  • Smart meter and PLC equipment protection

The JVR10S821K87P50 from Joyin is a metal oxide varistor (MOV) with a nominal varistor voltage of 820 V (V1mA) and a tolerance of ±10%. Designed with a 10 mm disc diameter, it provides high energy absorption for protecting electronic circuits from transient overvoltage events. The device supports a maximum continuous operating voltage of 510 VAC / 670 VDC, making it suitable for high-voltage power supply input protection, industrial equipment, and smart metering applications. It features UL 1449 4th edition and VDE approvals, RoHS compliance, and halogen-free construction. The symmetric V-I characteristics provide bidirectional clamping without polarity concerns.

The JVR10S821K87P50 operates based on the nonlinear voltage-current characteristic of zinc oxide (ZnO) grain boundaries: (1) Normal Operation — at voltages below the varistor voltage (820 V), the MOV presents a very high impedance (megaohms), drawing negligible leakage current and appearing transparent to the circuit; (2) Transient Clamping — when a voltage transient exceeds the varistor voltage, the ZnO grain boundaries undergo avalanche breakdown, causing the MOV impedance to drop dramatically to a few ohms, clamping the voltage across its terminals; (3) Energy Absorption — the surge current flows through the MOV, converting the transient energy into heat; (4) Recovery — once the transient subsides and the voltage drops below the clamping threshold, the MOV returns to its high-impedance state. The 10 mm disc provides sufficient thermal mass to absorb repeated surge events without degradation.

Lead Function
Lead 1 Terminal 1 — connect across the line to be protected
Lead 2 Terminal 2 — connect to ground or return path
  • AC mains input protection on a 380 VAC 3-phase industrial power supply suppressing lightning-induced surges
  • Home appliance (washing machine, refrigerator) varistor across AC input for surge protection per IEC 61000-4-5
  • Smart meter power supply module protecting the metering IC from transient overvoltage
  • Telecom rectifier input protecting against power line surges and switching transients
  • Solar inverter DC bus overvoltage protection on 600 V DC rail
Model Manufacturer Key Difference
JVR10N821K Joyin Similar, straight lead variant
V10E820A Littelfuse Competitive 10 mm MOV, 820 V
ERZ-V10D821 Panasonic Equivalent 10 mm MOV from Panasonic
S10K820 EPCOS/TDK Standard 10 mm MOV, 820 V, SIOV series
TNR10V821K Nippon Chemi-Con 10 mm disc varistor, 820 V alternative
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Service & Packaging

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Contact Information

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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