Alternatives to Taiwan Semiconductor BAT42W
Taiwan Semiconductor BAT42W and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 BAT42WTaiwan Semiconductor |  BAT42W RHGTaiwan Semiconductor Corporation |  BAT42W-7-FDiodes Incorporated | +3more | |
|---|---|---|---|---|
| FFF Compatibility | Both parts are housed in a standard 2-pin SOD-123 package with identical footprints and terminal dimensions. Pinout is confirmed as Pin 1: Cathode, Pin 2: Anode.The physical package shape, terminal dimensions, and mounting requirements are identical.All critical electrical specifications, including reverse voltage (30V), forward current (200mA), forward voltage (1V @ 200mA), and reverse recovery time (5ns), match or exceed the original part. | Both parts utilize the standard 2-pin SOD-123 package with identical terminal assignments (Pin 1: Cathode, Pin 2: Anode).The physical package outline, height, and land pattern conform to JEDEC SOD-123 standards.Matches all primary electrical and timing characteristics of the original diode, offering identical forward voltage and recovery profiles. | ||
 AI Summary | BAT42W by Taiwan Semiconductor: Diode 30 V 200mA Surface Mount SOD-123. | The BAT42W RHG is the direct, active, and fully RoHS/halogen-free compliant successor to the legacy BAT42W from the same manufacturer. It serves as a seamless drop-in replacement that eliminates lifecycle risk with zero design changes.
| The BAT42W-7-F is a highly reliable and active second-source option from Diodes Incorporated. It offers a perfect match in electrical ratings, package dimensions, and pinout configurations.
| |
| Lifecycle Status | NRND | Active | Active | |
| Market Availability | Non-stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Diode 30 V 200mA Surface Mount SOD-123 | Diode 30 V 200mA Surface Mount SOD-123 | Diode 30 V 200mA Surface Mount SOD-123 | |
| Manufacturer | Taiwan Semiconductor | Taiwan Semiconductor Corporation | Diodes Incorporated | |
| Type | Diodes | Diodes | Diodes | |
| Datasheet | Open | Open | Open | |
| Lead Time | 18 weeks | 30 weeks | 40 weeks | |
| Country of Origin | TW | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.10.0070 | - | - | |
| Moisture Sensitivity Level | - | - | - | |
| Speed | Small Signal =< 200mA (Io), Any Speed | - | - | |
| Technology | Schottky | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | SOD-123 | - | - | |
| Capacitance @ Vr, F | 10pF @ 1V, 1MHz | - | - |
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|---|---|---|---|
 BAT54onsemi | In stock | Active | 7Alternatives availableSee Alternatives |
 BAT54Sonsemi | In stock | Obsolete | 6Alternatives availableSee Alternatives |
| BAT54Consemi | In stock | Obsolete | 6Alternatives availableSee Alternatives |
 BAT54Aonsemi | In stock | Obsolete | 6Alternatives availableSee Alternatives |
| BAS28Nexperia | Non-stock | Active | 2Alternatives availableSee Alternatives |
 74ABT240PWNexperia | Non-stock | Obsolete | 4Alternatives availableSee Alternatives |
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Frequently asked questions
No. The Taiwan Semiconductor BAT42W is marked not-recommended-for-new-designs (NRND): it is still supplied for existing production but the manufacturer discourages new sockets. The qualified alternatives here are better long-term choices for a new design.
The closest qualified second sources for the Taiwan Semiconductor BAT42W are the BAT42W RHG (Taiwan Semiconductor Corporation) and the BAT42W-7-F (Diodes Incorporated), out of 5 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Yes. The leading alternatives to the BAT42W are fit-, form- and function-compatible — the same package and pinout with matching key electrical specifications — so they drop in without PCB changes. Always confirm the parameters critical to your design against the alternative's datasheet before committing.
The BAT42W (Taiwan Semiconductor) is a part in the Diodes category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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