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Best Alternatives to RL1812A470K

Package: 1812RUILONFabrication ProductsVaristor Voltage: 45.6V ~ 57VMax Allowable Voltage (AC): 30VMax Allowable Voltage (DC): 38VMax Energy (10/1000µs): 1.5JMax Clamping Voltage: 125V

RUILON RL1812A470K is a common 1812 surface-mount varistor. While several alternatives exist, careful matching of varistor voltage and surge current is critical for safe and effective circuit protection.

AI replacement insight

Electrical riskmedium

Varistor voltage must be compatible with the circuit's operating and absolute maximum voltages.

Package risklow

The 1812 package is standard, but substitutes should have their land patterns confirmed.

Can it be replaced directly?

Yes, RL1812A560K is a strong candidate for replacing RL1812A470K, as it shares the same package and key performance ratings.

Best replacement path

RL1812A560K from the same manufacturer series is a strong candidate, offering a slightly higher voltage rating.

Main risk

The primary risk is mismatching the varistor voltage, which can lead to either insufficient protection or nuisance tripping.

Recommended alternatives

2
RL1812A560K package
RL1812A560K

RUILON

Needs validationlow risk

A pin-compatible alternative from the same series with a higher voltage rating and identical surge current.

View details

Alternative comparison matrix

Feature / factorRL1812A470KRL1812A560KRL1812A390KAlt 3Compatibility / risk
Package1812181218121812 — Same form and fit.; RL1812A390K: Same form and fit.
Voltage38V45V30V45V / 30V — Higher max DC voltage provides more margin.; RL1812A390K: Lower max DC voltage reduces operating margin.
Current800A800A800A800A — Identical surge current rating.; RL1812A390K: Identical surge current rating.
Temperature-40°C ~ +85°C-40°C to +85°C--40°C to +85°C — Identical operating temperature range.

Application & sourcing insights

Questions & answers

Verified drop-in options for RL1812A470K 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.