What risks should I check before replacing 1N457A?

Before replacing 1N457A, verify that the replacement's parameters are suitable. Key risks include differences in reverse recovery time (trr) for high-speed circuits and changes in diode capacitance (Ct) which can affect signal integrity or timing.

1N457A Alternatives, Datasheet & Cross Reference | onsemi

Find replacements for the 1N457A, a 70V 200mA small signal diode in a DO-35 package. Strong alternatives like the widely available 1N4148 series offer similar performance and higher voltage ratings for enhanced reliability.

AI replacement insight

Electrical risklow

Key specs of top candidates meet or exceed the target.

Package risklow

DO-35 is a standard axial package with consistent dimensions.

Sourcing risklow

The 1N4148 family is widely available from multiple vendors.

Can it be replaced directly?

Direct replacement for 1N457A should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Source a 1N4148-series diode from a reputable manufacturer like onsemi (1N4148TA) or STMicroelectronics (1N4148PF).

Main risk

The main risk is functional mismatch. Ensure the replacement's switching speed (trr) and capacitance are suitable for the circuit.

Recommended alternatives

A likely pin-compatible replacement from the same manufacturer with a higher voltage rating.

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Alternative comparison matrix

Feature / factor	1N457A	1N4148TA	1N4148PF	Compatibility / risk
Package	DO-35	DO-204AH (DO-35)	DO-35	DO-204AH (DO-35) — Form factor matches.; 1N4148PF: Form factor matches.
Voltage	70V	100V	100V	100V — Higher voltage provides more safety margin.; 1N4148PF: Higher voltage provides more safety margin.
Current	200mA	200mA	200mA	200mA — Average forward current matches.; 1N4148PF: Average forward current matches.
Trr	Not specified (implied fast)	4ns	4ns	4ns — Fast switching speed, typical for this class.; 1N4148PF: Fast switching speed, typical for this class.
Capacitance	8.0pF	4.0pF	-	4.0pF — Lower capacitance is often better but may affect timing.

Application & sourcing insights

Questions & answers

Verified drop-in options for 1N457A 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.