Is there a pin-compatible replacement for SQT1.00M?

While parts like SQT2.00M share the same package and pinout, no direct pin-compatible replacement with a 1.0A rating has been identified. All candidates require electrical parameter review, especially the current rating.

What risks should I check before replacing SQT1.00M?

The primary risk is the current rating. Using a fuse with a higher rating (e.g., 2.0A or 2.5A) will not protect the circuit from overcurrent events at the original 1.0A level, potentially leading to damage. Always verify the new fuse's I²t value and time-current curve.

SQT1.00M Alternatives, Datasheet & Cross Reference | TLC Electronic

SQT1.00M is a 1A/300V time-lag through-hole fuse. Alternatives exist with similar packages but different current ratings, requiring careful review of circuit protection needs.

AI replacement insight

Electrical riskhigh

All candidates have higher current ratings (2.0A-2.5A vs 1.0A), which will not protect the circuit as intended.

Package risklow

Candidates have a similar square through-hole form factor, but dimensions should be verified.

Can it be replaced directly?

No direct 1-to-1 replacement has been found. All known alternatives have different current ratings.

Best replacement path

Use SQT2.00M from the same manufacturer if the circuit can tolerate a 2.0A fuse instead of 1.0A.

Main risk

Incorrect overcurrent protection due to higher current ratings in all available alternatives.

Recommended alternatives

Functional alternative from the same series with a higher 2.0A current rating; package is compatible.

View details

Alternative comparison matrix

Feature / factor	SQT1.00M	SQT2.00M	2010T2.5A250V	Compatibility / risk
Current	1.0A	2.0A	2.5A	2.0A / 2.5A — Candidate has 2x higher current rating, offering less protection.; 2010T2.5A250V: Candidate has 2.5x higher current rating, offering much less protection.
Voltage	300.0V	300.0V	250V/300V	300.0V / 250V/300V — matched; 2010T2.5A250V: Voltage rating is comparable.
Polarity Or Type	Time-Lag (Slow-Blow)	Time-Lag (Slow-Blow)	Time-Lag	Time-Lag (Slow-Blow) — matched; 2010T2.5A250V: matched
Package	Through Hole	Radial Lead	Through Hole	Radial Lead / Through Hole — Both are square through-hole packages with 5.08mm lead pitch.; 2010T2.5A250V: Both are square through-hole fuses; dimensional check needed.

Application & sourcing insights

Questions & answers

SQT2.00M from the same series is a functional alternative but has a higher 2.0A current rating. This will change the overcurrent protection level and must be verified for your application's safety requirements.