What risks should I check before replacing JK30-200?

When replacing the JK30-200, you must verify the substitute has the same or higher voltage rating (30V), and identical hold (2A) and trip (4A) currents. Also check secondary parameters like time-to-trip, power dissipation, and resistance to ensure similar circuit behavior.

JK30-200 Alternatives, Datasheet & Cross Reference | Jinrui Electronic Materials Co.

JK30-200 is a 30V, 2A hold current PTC resettable fuse in a radial leaded package. Finding a replacement requires matching voltage, hold/trip currents, and physical dimensions for proper circuit protection.

AI replacement insight

Electrical riskhigh

Using a part with incorrect current ratings will compromise circuit protection.

Package risklow

Radial leaded packages are common, but lead spacing should be confirmed.

Can it be replaced directly?

Direct replacement for JK30-200 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The best replacement path is finding a PTC fuse with identical 30V voltage, 2A hold current, and 4A trip current ratings in the same radial leaded package, such as the RUILON RL30-200.

Main risk

The main risk is using a substitute with a higher hold or trip current, which would fail to protect the downstream circuit under the intended fault conditions.

Recommended alternatives

A strong alternative with matching voltage, hold/trip currents, and package. Minor parametric differences require review.

View details

Alternative comparison matrix

Feature / factor	JK30-200	RL30-200	RL30-300	Compatibility / risk
Package	Radial Leaded, 2-pin	Radial Leaded, 2-pin	Radial Leaded, 2-pin	Radial Leaded, 2-pin — Form and fit match.; RL30-300: Form and fit match.
Voltage	30.0V	30.0V	30.0V	30.0V — Maximum voltage rating matches.; RL30-300: Maximum voltage rating matches.
Current	4.0A	4.0A	6.0A	4.0A / 6.0A — Trip current (Itrip) matches.; RL30-300: Trip current is 50% higher, reducing protection.
Power	1.2W	1.5W	-	1.5W — Slightly higher power dissipation, may affect thermal characteristics.

Application & sourcing insights

Questions & answers

Verified drop-in options for JK30-200 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.