Overview
The Panasonic ERZV20D751 is a compact, high-performance zinc oxide (ZNR) transient/surge absorber varistor rated for 750V nominal voltage. Part of Panasonic’s proven ZNR series, this component delivers 7.5kA maximum peak surge current capacity in a standard 20mm disc package, making it well-suited for suppressing voltage transients in industrial AC and DC circuits rated up to 460V AC / 615V DC.
Key Features
- 750V nominal varistor voltage (675–825V operating range)
- 7.5kA peak surge current at 8/20µs waveform
- 1.24kV maximum clamping voltage
- 20mm disc case—compact, through-hole mounting
- Wide operating temperature range: −40°C to +85°C
- Zinc oxide (ZNR) non-linear resistor type for reliable transient absorption
- Multiple international safety certifications (UL1449, VDE, CSA, CQC)
Technical Specifications
The ERZV20D751 is engineered to absorb high-energy transients in a single event or repeated surges with minimal leakage current. Peak energy dissipation reaches 420J (10/1000µs pulse), ensuring effective voltage clamping when connected across 460V AC (3-phase, line–line or line–ground) or 615V DC supply circuits.
Typical Applications
- Three-phase AC 380V/460V power line protection (line–line and line–ground)
- DC voltage clamping in industrial motor drives and power supplies
- Surge absorption in control circuits and switchgear
- Transient protection for sensitive electronic components and I/O modules
- Industrial automation systems requiring voltage spikes/notch suppression
Compatibility & Replacements
Compatible With
- AC 380V / 460V three-phase power systems
- DC 500V / 615V nominal supply circuits
- Standard through-hole PCB layouts with 20mm disc spacing
- Any circuit requiring 750V ±13% nominal voltage clamping
Replaces / Drop-In Replacement For
The ERZV20D751 is a direct replacement for varistors specified to the same performance envelope (750V nominal, 7.5kA surge). If the original circuit specification calls for a ZNR varistor with equivalent clamping voltage (1.24kV) and surge current, this unit is compatible. Verify exact pinout and package fit before substitution.
Works With
- Panasonic ZNR series varistor families (ERZV10D751, ERZV14D751, ERZV20D751)
- Standard lead-free PCB soldering (RoHS-compliant)
- Industrial circuit boards requiring IEC 61051 or UL1449 rated components
