Is there a pin-compatible replacement for SS24B?

Yes, several parts like SS54SMB, SS36B, and SS26B use the same DO-214AA (SMB) package and are considered pin-compatible. However, electrical parameters like forward voltage vary, requiring engineering review.

What risks should I check before replacing SS24B?

The main risk is increased power loss due to higher forward voltage (Vf). Compare the candidate's Vf at your operating current to the SS24B's 0.55V. Also, verify the temperature range and any differences in dynamic characteristics.

SS24B Alternatives, Datasheet & Cross Reference | Microdiode Semiconductor (Shenzhen) Co., Ltd.

The SS24B is a 40V, 2A Schottky diode in a DO-214AA (SMB) package. When seeking replacements, focus on matching the package and ensuring voltage and current ratings are equal or greater, while paying close attention to forward voltage (Vf) to manage efficiency.

AI replacement insight

Electrical riskmedium

Forward voltage (Vf) mismatch is common and impacts efficiency and heat.

Package risklow

The DO-214AA (SMB) package is standardized, making physical replacement straightforward.

Can it be replaced directly?

While several parts are pin-compatible, no exact drop-in replacement exists across all parameters. SS54SMB is the closest functional upgrade, offering better current handling in the same package.

Best replacement path

Upgrade to SS54SMB for a higher current rating or SS36B for higher voltage and current margins.

Main risk

Increased power dissipation from candidates with a higher forward voltage (Vf), which can lead to thermal issues.

Recommended alternatives

A form-fit compatible Schottky diode with a higher current rating (5A) and wider temperature range.

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Alternative comparison matrix

Feature / factor	SS24B	SS54SMB	SS36B	SS26B	Compatibility / risk
Package	DO-214AA (SMB)	DO-214AA (SMB)	DO-214AA (SMB)	DO-214AA (SMB)	DO-214AA (SMB) — Same package ensures form-fit compatibility.; SS36B: Same package ensures form-fit compatibility.; SS26B: Same package ensures form-fit compatibility.
Voltage	40V	40V	60V	60V	40V / 60V — Voltage rating is identical.; SS36B: Higher voltage rating provides more design margin.; SS26B: Higher voltage rating provides more design margin.
Current	2A	5A	3A	2A	5A / 3A / 2A — Higher current rating provides more design margin.; SS36B: Higher current rating provides more margin.; SS26B: Current rating is identical.
Temperature	-50°C to +125°C	-55°C to +150°C	-	-	-55°C to +150°C — Wider operating temperature range.
Vf	0.55V @ 2A	0.55V @ 5A	0.7V @ 3A	0.7V @ 2A	0.55V @ 5A / 0.7V @ 3A / 0.7V @ 2A — Vf at 2A is not specified but likely lower, which is favorable. Review datasheet.; SS36B: Forward voltage is higher, which will increase power loss. Verify thermal impact.; SS26B: Significantly higher forward voltage will increase power loss by ~27%.

Application & sourcing insights

Questions & answers

SS54SMB is a strong alternative, offering a higher current rating (5A) in the same package. SS36B is also a good upgrade option with higher voltage and current. Always verify datasheet specifics for your application.