Alternatives to Diotec Semiconductor KBU8M-E4/51
Diotec Semiconductor KBU8M-E4/51 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 KBU8M-E4/51Diotec Semiconductor |  KBU8M-M3/PVishay General Semiconductor - Diodes Division | KBU8M-M3/AVishay General Semiconductor - Diodes Division | +6more | |
|---|---|---|---|---|
| FFF Compatibility | Direct drop-in pinout (-, ~, ~, +) and lead spacing in the exact same KBU package.Identical physical dimensions and mounting footprint.Meets or exceeds all electrical characteristics, including a slightly lower maximum forward voltage of 0.98 V compared to the original 1.0 V. | Direct drop-in pinout (-, ~, ~, +) and lead spacing in the exact same KBU package.Identical physical dimensions and mounting footprint.Meets or exceeds all electrical characteristics, including a slightly lower maximum forward voltage of 0.98 V compared to the original 1.0 V. | ||
 AI Summary | KBU8M-E4/51 by Diotec Semiconductor: Bridge Rectifier Single Phase Standard 1 kV Through Hole KBU. | This is the manufacturer's recommended direct active replacement for the obsolete original part. It comes in tube packaging and updates the material set to modern green standards (halogen-free and RoHS-compliant) while matching all physical and electrical parameters.
| This part is identical to the KBU8M-M3/P alternative, but it is supplied in anti-static PVC tray packaging instead of tubes. It is a direct drop-in replacement that meets all performance and safety requirements.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Non-stock | In stock | Non-stock | |
| REACH | REACH | REACH | Unknown | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Bridge Rectifier Single Phase Standard 1 kV Through Hole KBU | Bridge Rectifier Single Phase Standard 1 kV Through Hole KBU | Bridge Rectifier Single Phase Standard 1 kV Through Hole KBU | |
| Manufacturer | Diotec Semiconductor | Vishay General Semiconductor - Diodes Division | Vishay General Semiconductor - Diodes Division | |
| Type | Diodes | Diodes | Diodes | |
| Datasheet | Open | Open | Open | |
| Lead Time | 10 weeks | 17 weeks | 15 weeks | |
| Country of Origin | CN | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.10.0080 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Diode Type | Single Phase | - | - | |
| Technology | Standard | - | - | |
| Mounting Type | Through Hole | - | - | |
| Package / Case | 4-SIP, KBU | - | - | |
| Operating Temperature | -50°C ~ 150°C (TJ) | - | - | |
| Supplier Device Package | KBU | - | - | |
| Voltage - Peak Reverse (Max) | 1 kV | - | - | |
| Current - Reverse Leakage @ Vr | 10 µA @ 1000 V | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 KBU8Bonsemi | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Diotec Semiconductor KBU8M-E4/51 is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the Diotec Semiconductor KBU8M-E4/51 are the KBU8M-M3/P (Vishay General Semiconductor - Diodes Division) and the KBU8M-M3/A (Vishay General Semiconductor - Diodes Division), out of 8 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the KBU8M-E4/51 are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The KBU8M-E4/51 (Diotec 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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