What risks should I check before replacing 1SMA4735A?

Before replacing 1SMA4735A, check for differences in Zener voltage (Vz), power dissipation, Zener impedance (Zzt), and reverse leakage current (Ir). Also, confirm the package dimensions and thermal properties are suitable for your design.

1SMA4735A Alternatives, Datasheet & Cross Reference | Luguang Electronic Technology Co., Ltd.

1SMA4735A is a popular 6.2V, 1W Zener diode in a surface-mount SMA package, widely used for voltage regulation. This page reviews potential alternatives, including cross-vendor options and functional substitutes.

AI replacement insight

Electrical riskmedium

Mismatch in Zener voltage or impedance can cause circuit malfunction.

Package risklow

SMA (DO-214AC) is a standardized package, making physical replacement straightforward.

Sourcing risklow

This is a common Zener diode type with multiple manufacturers.

Can it be replaced directly?

Direct replacement for 1SMA4735A should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Cross-sourcing the same part number, 1SMA4735A, from other qualified vendors is the lowest-risk approach.

Main risk

The primary risk is substituting with a part that has a different Zener voltage, which will alter the circuit's voltage regulation point.

Recommended alternatives

A cross-vendor alternative with matching key electrical parameters and package.

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Alternative comparison matrix

Feature / factor	1SMA4735A	1SMA4735A	1SMA4736A	Compatibility / risk
Package	SMA (DO-214AC)	SMA	SMA (DO-214AC)	SMA / SMA (DO-214AC) — Form factor matches.; 1SMA4736A: Form factor matches.
Voltage	6.2V	6.2V	6.8V	6.2V / 6.8V — Nominal Zener voltage matches.; 1SMA4736A: Zener voltage is higher, requires circuit validation.
Power	1.0W	1.0W	1.0W	1.0W — Power dissipation matches.; 1SMA4736A: Power dissipation matches.
Impedance	2Ω	2Ω	3.5Ω	2Ω / 3.5Ω — Zener impedance matches.; 1SMA4736A: Zener impedance is higher, affecting regulation.
Manufacturer	LGE	GOODWORK	-	GOODWORK — Cross-vendor alternative.

Application & sourcing insights

Questions & answers

Verified drop-in options for 1SMA4735A are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.