What risks should I check before replacing SS1200?

Verify the replacement has the same SMA (DO-214AC) package, a voltage rating of at least 200V, and a current rating of at least 1A. Also check forward voltage (Vf) if power efficiency is critical.

SS1200 Alternatives, Datasheet & Cross Reference | Microdiode Semiconductor (Shenzhen) Co., Ltd.

SS1200 is a 200V, 1A Schottky diode in a common SMA package. Finding a replacement involves matching the package, voltage, and current ratings. Several options are available, with SS120A being a strong candidate for direct replacement.

AI replacement insight

Package riskhigh

Several candidates are in SMB or other packages, requiring a PCB change.

Electrical risklow

Most candidates meet or exceed voltage/current ratings. Check Vf for efficiency-critical designs.

Can it be replaced directly?

Direct replacement for SS1200 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

SS120A from Yangjie is a strong candidate, matching key electrical parameters and the SMA package.

Main risk

The main risk is using a part with a different package (e.g., SMB instead of SMA) or a lower voltage rating, which requires a board redesign or can cause device failure.

Recommended alternatives

A strong alternative with matching package, voltage, current, and diode type.

View details

Alternative comparison matrix

Feature / factor	SS1200	SS120A	SS5200B	Compatibility / risk
Package	DO-214AC, SMA	DO-214AC (SMA)	DO-214AA, SMB	DO-214AC (SMA) / DO-214AA, SMB — Package is physically compatible.; SS5200B: Not a drop-in replacement, requires PCB layout change.
Voltage	200V	200V	200V	200V — Reverse voltage rating matches.; SS5200B: Reverse voltage rating matches.
Current	1A	1A	5A	1A / 5A — Average rectified current matches.; SS5200B: Higher current rating is a safe upgrade.
Vf	0.9V @ 1A	0.9V @ 1A	-	0.9V @ 1A — Forward voltage is identical, ensuring similar efficiency.
Temperature	-55°C to +150°C	-55°C to +150°C	-	-55°C to +150°C — Operating temperature range matches.

Application & sourcing insights

Questions & answers

Verified drop-in options for SS1200 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.