Is there a pin-compatible replacement for SMD0805-010-33V?

Yes, several 0805 package PTC fuses are pin-compatible. However, their electrical parameters, especially hold and trip currents, differ and must be carefully reviewed.

What risks should I check before replacing SMD0805-010-33V?

Verify the substitute's hold current (Ih) and trip current (It). A higher hold current provides less overcurrent protection. Also ensure the maximum voltage (Vmax) is at least 33V.

SMD0805-010-33V Alternatives, Datasheet & Cross Reference | TECHFUSE

Finding a substitute for the TECHFUSE SMD0805-010-33V PTC fuse requires matching its 33V rating, 0805 package, and 100mA hold current. Alternatives exist but may have different current ratings requiring review.

AI replacement insight

Electrical riskmedium

Hold/trip current mismatch requires circuit analysis.

Package risklow

Candidates share the common 0805 package.

Can it be replaced directly?

No direct drop-in replacement with identical key parameters was found. Available alternatives have a higher hold current, which reduces the level of overcurrent protection.

Best replacement path

First, try to source the original part. If unavailable, evaluate parametric alternatives like SMD0805-020C-33V, ensuring the circuit can tolerate the higher 200mA hold current.

Main risk

The primary risk is using a substitute with a higher hold current (e.g., 200mA vs 100mA), which may fail to protect the downstream circuit from overcurrent conditions.

Recommended alternatives

A 0805 PTC fuse with same voltage but higher hold and trip currents. Requires engineering review.

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Alternative comparison matrix

Feature / factor	SMD0805-010-33V	BSMD0805-020-33V	SMD0805-020C-33V	Compatibility / risk
Package	0805	0805	0805	0805 — Same 2-pin 0805 package.; SMD0805-020C-33V: Same 2-pin 0805 package.
Voltage	33V	33V	33V	33V — Maximum voltage rating matches.; SMD0805-020C-33V: Maximum voltage rating matches.
Current	0.3A	0.5A	0.5A	0.5A — Trip current is higher.; SMD0805-020C-33V: Trip current is higher.
Resistance	1.0Ω	0.5Ω	0.5Ω	0.5Ω — Initial resistance is lower.; SMD0805-020C-33V: Initial resistance is lower.

Application & sourcing insights

Questions & answers

No perfect drop-in is identified. Candidates like BNstar SMD0805-020C-33V match the package and voltage but have a higher 200mA hold current, requiring circuit analysis before use.