Is there a pin-compatible replacement for JK-MSMD150-24V?

The TECHFUSE mSMD150-33V shares the same 1812 package and 2-pin layout, making it a likely form-fit replacement. However, always verify the datasheet footprint before production.

What risks should I check before replacing JK-MSMD150-24V?

Verify the hold current (Ih), trip current (It), max voltage (Vmax), and max fault current (Imax). Also, compare the resistance and time-to-trip curves to ensure protection characteristics match your application's needs.

JK-MSMD150-24V Alternatives, Datasheet & Cross Reference | Jinrui Electronic Materials Co.

Finding a replacement for the JK-MSMD150-24V PTC fuse involves matching the 1812 package, 1.5A hold current, and 24V rating. Several alternatives exist with similar or improved characteristics.

AI replacement insight

Electrical riskmedium

Candidates may have different time-to-trip or resistance curves. Imax must be verified.

Package risklow

All viable candidates use the same 1812 package, but footprint should be confirmed.

Can it be replaced directly?

Yes, TECHFUSE mSMD150-33V is a strong functional alternative for JK-MSMD150-24V, matching the 1812 package, 1.5A hold current, and offering a higher 33V rating.

Best replacement path

The TECHFUSE mSMD150-33V is the strongest candidate, matching all key parameters with an improved voltage rating.

Main risk

The main risk when substituting PTC fuses is a mismatch in hold/trip currents or a lower max fault current (Imax), which could lead to circuit damage.

Recommended alternatives

A PTC fuse in the same 1812 package with matching hold current and a higher voltage rating.

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Alternative comparison matrix

Feature / factor	JK-MSMD150-24V	mSMD150-33V	SMD1812-150C-33V	Compatibility / risk
Package	1812	1812	1812	1812 — Same EIA package size.; SMD1812-150C-33V: Same EIA package size.
Current	100A	100A	50A	100A / 50A — Max Fault Current (Imax) matches.; SMD1812-150C-33V: Lower max fault current is a critical downgrade.
Voltage	24V	33V	33V	33V — Higher max voltage provides more safety margin.; SMD1812-150C-33V: Higher max voltage provides more safety margin.
Resistance	0.160 Ω	0.160 Ω	0.180 Ω	0.160 Ω / 0.180 Ω — Max post-trip resistance (R1max) matches.; SMD1812-150C-33V: Slightly higher resistance may affect circuit behavior.

Application & sourcing insights

Questions & answers

The TECHFUSE mSMD150-33V is an excellent alternative, offering the same 1.5A hold current and 1812 package with a higher voltage rating of 33V.