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Best Alternatives to RL1812A560K

Package: 1812RUILONCircuit ProtectionVaristor Voltage: 54V ~ 67.5VMax Allowable Voltage (AC): 35VMax Allowable Voltage (DC): 45VMax Clamping Voltage: 148VMax Energy (10/1000μs): 1.5J

Finding a substitute for the RL1812A560K varistor involves matching the 1812 package, 800A surge current, and ~54V varistor voltage. The best options are typically within the same manufacturer series to ensure similar performance characteristics.

AI replacement insight

Package risklow

All reviewed candidates use the same 1812 surface-mount package, ensuring form-fit compatibility.

Electrical riskmedium

Key parameters like varistor voltage and surge current must be closely matched. Several candidates were rejected for incompatible voltages.

Can it be replaced directly?

Direct replacement for RL1812A560K should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

RL1812A470K is the strongest candidate, offering pin compatibility and improved clamping voltage with only a minor difference in allowable voltage to verify.

Main risk

The primary risk is electrical mismatch. Candidates may have incorrect voltage ratings leading to circuit malfunction, or lower surge current ratings leading to premature failure.

Recommended alternatives

2
RL1812A470K package
RL1812A470K

RUILON

Needs validationlow risk

Strong alternative with same package, surge current, and better clamping voltage. Requires review of slightly lower allowable voltage.

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Alternative comparison matrix

Feature / factorRL1812A560KRL1812A470KFPV453215E480PKTAlt 3Compatibility / risk
Package1812181218121812 — Same package and pin count.; FPV453215E480PKT: Same package and pin count.
Voltage35V AC / 45V DC30V AC / 38V DC34V AC / 48V DC30V AC / 38V DC / 34V AC / 48V DC — Slightly lower max allowable voltage. Verify against circuit operating voltage.; FPV453215E480PKT: Max allowable voltages are very close to target.
Current800A800A500A800A / 500A — Peak surge current rating is identical.; FPV453215E480PKT: Significantly lower peak surge current rating.
Power1.5J-2.5J2.5J — Higher energy absorption capability is an upgrade.

Application & sourcing insights

Questions & answers

Verified drop-in options for RL1812A560K are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.