Is there a pin-compatible replacement for 1SMA5929A?

BZG03C15 shares the same 2-pin DO-214AC (SMA) package and is likely pin-compatible. However, you must verify its electrical characteristics, like Zener impedance, for your specific circuit.

What risks should I check before replacing 1SMA5929A?

Verify the Zener voltage is exactly 15V. Check that the power rating is at least 1.5W. Also, compare the Zener impedance and reverse leakage current from the datasheets to ensure circuit stability.

1SMA5929A Alternatives, Datasheet & Cross Reference | Shenzhen SLKOR Micro Semicon Co., Ltd.

Find and compare replacements for the 1SMA5929A, a 15V, 1.5W Zener diode in a DO-214AC (SMA) package. Review key parametric differences like voltage and power before selection.

AI replacement insight

Electrical riskhigh

Zener voltage is critical for regulation; deviations require redesign.

Package risklow

DO-214AC (SMA) is a standard package, ensuring physical compatibility.

Can it be replaced directly?

No exact drop-in replacement has been identified. BZG03C15 is a strong candidate but has a higher power rating. All alternatives require engineering review.

Best replacement path

BZG03C15 offers the same 15V rating with a higher 3W power dissipation, making it a robust upgrade.

Main risk

The primary risk is mismatch in Zener voltage. Candidates with different voltages will not function correctly without circuit redesign.

Recommended alternatives

Matches 15V Zener voltage and package, with a higher 3W power rating for increased robustness.

View details

Alternative comparison matrix

Feature / factor	1SMA5929A	BZG03C15	1SMA5928A	Compatibility / risk
Package	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA) — Form and fit match.; 1SMA5928A: Form and fit match.
Voltage	15.0V	15.0V	13.0V	15.0V / 13.0V — Nominal Zener voltage matches.; 1SMA5928A: Lower Zener voltage is a critical deviation.
Power	1.5W	3.0W	1.5W	3.0W / 1.5W — Higher power rating provides more thermal margin.; 1SMA5928A: Power rating matches.
Zener Impedance	9 Ω	5 Ω	-	5 Ω — Lower impedance may improve regulation. Verify from datasheet.

Application & sourcing insights

Questions & answers

BZG03C15 is a strong candidate, offering the same 15V Zener voltage and package with an increased 3W power rating. This upgrade may improve reliability but requires thermal consideration.