Alternatives to onsemi KBU8B
onsemi KBU8B and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 KBU8Bonsemi | KBU8BNavitas Semiconductor, Inc. | KBU8DNavitas Semiconductor, Inc. | +5more | |
|---|---|---|---|---|
| FFF Compatibility | The Navitas KBU8B utilizes the exact same through-hole KBU package with the identical pin spacing and pin configuration (+, AC, AC, -).The physical dimensions, housing height (~19.3 mm), length (~23.2 mm), and lead spacing are fully identical to the original onsemi part.All electrical ratings, including 100 V breakdown voltage, 8 A forward current, and 1 V forward voltage drop, match the target part exactly. | Uses the identical KBU package with identical pinout and spacing, requiring zero board changes.The structural body size and lead dimensions match the original KBU footprint exactly.Exceeds the 100 V reverse voltage rating with a 200 V capability while matching the 8 A current rating and other thermal specs. | ||
 AI Summary | KBU8B by onsemi: Bridge Rectifier Single Phase Standard 100 V Through Hole KBU. | This is a direct, active second-source replacement from Navitas Semiconductor in the exact same JEDEC KBU package. It provides an identical drop-in physical footprint, mechanical dimensions, and electrical ratings, making it the highest-confidence substitute.
| This is an active sibling variant from the same series featuring a 200 V reverse voltage rating. It acts as a direct drop-in replacement with an increased safety margin for electrical breakdown.
| |
| Lifecycle Status | Obsolete | Active | Unknown | |
| Market Availability | Discontinued | In stock | Unknown | |
| REACH | REACH | Unknown | Unknown | |
| RoHS | RoHS | Unknown | Unknown | |
| Description | Bridge Rectifier Single Phase Standard 100 V Through Hole KBU | Bridge Rectifier Single Phase Standard 100 V Through Hole KBU | This is an active sibling variant from the same series featuring a 200 V reverse voltage rating. It acts as a direct drop-in replacement wit | |
| Manufacturer | onsemi | Navitas Semiconductor, Inc. | Navitas Semiconductor, Inc. | |
| Type | Diodes | Diodes | Component | |
| Datasheet | Open | Open | N/A | |
| Lead Time | 15 weeks | 5 weeks | Unknown | |
| Country of Origin | - | - | - | |
| 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 | -55°C ~ 150°C (TJ) | - | - | |
| Supplier Device Package | KBU | - | - | |
| Voltage - Peak Reverse (Max) | 100 V | - | - | |
| Current - Reverse Leakage @ Vr | 10 µA @ 100 V | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 KBU8M-E4/51Diotec Semiconductor | Non-stock | Obsolete | 8Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi KBU8B 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 onsemi KBU8B are the KBU8B (Navitas Semiconductor, Inc.) and the KBU8D (Navitas Semiconductor, Inc.), out of 7 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 KBU8B 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 KBU8B (onsemi) 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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