Is there a pin-compatible replacement for mSMD110-24V?

FSMD110-33R shares the same 1812 package and pin configuration. While electrically very similar, it should be validated in your specific circuit before being considered a direct pin-to-pin replacement.

What risks should I check before replacing mSMD110-24V?

Verify the hold current (1.1A) and trip current (2.2A) are identical. Ensure the replacement's max voltage is ≥24V and max fault current is ≥100A. Also check the time-current curve and resistance values.

mSMD110-24V Alternatives, Datasheet & Cross Reference | TECHFUSE

Reviewing alternatives for the TECHFUSE mSMD110-24V, a 1.1A/24V PTC fuse in an 1812 package. Key considerations for substitutes are matching hold current, package size, and ensuring equal or greater voltage and max fault current ratings.

AI replacement insight

Electrical riskhigh

Mismatched hold current or lower max fault current can lead to circuit damage or component failure.

Package risklow

All reviewed candidates use the same 1812 package, ensuring physical compatibility.

Can it be replaced directly?

No verified direct drop-in replacement is available without engineering review. However, FSMD110-33R is a very close functional match.

Best replacement path

FSMD110-33R by FUZETEC is a strong functional alternative, matching key electricals and offering a higher voltage rating.

Main risk

The primary risk is using a part with an incorrect hold current (Ih), which compromises circuit protection. A lower max fault current (Imax) is also a critical safety risk.

Recommended alternatives

Strong functional alternative with matching 1.1A hold current, 1812 package, and a higher 33V voltage rating.

View details

Alternative comparison matrix

Feature / factor	mSMD110-24V	FSMD110-33R	SMD1812-110C-33V	Compatibility / risk
Package	1812	1812	1812	1812 — Form factor matches.; SMD1812-110C-33V: Form factor matches.
Voltage	24V	33V	33V	33V — Higher voltage rating provides increased safety margin.; SMD1812-110C-33V: Higher voltage rating is a safe upgrade.
Current	1.1A	1.1A	1.1A	1.1A — Hold current matches target specification.; SMD1812-110C-33V: Hold current matches target specification.
Max Fault Current	100A	100A	40A	100A / 40A — Maximum fault current rating matches.; SMD1812-110C-33V: Significantly lower rating poses a safety risk in high-fault-current circuits.
Resistance	0.250Ω	0.200Ω	-	0.200Ω — Post-trip resistance (R1max) is slightly lower, which is acceptable.

Application & sourcing insights

Questions & answers

FSMD110-33R from FUZETEC is a strong candidate. It matches the 1.1A hold current and 1812 package, with a higher 33V voltage rating for added safety margin.