STMicroelectronics STB40NF
STB40NF variants from STMicroelectronics
STB40NF Overview
What changes between part numbers, and what to check before you lock the BOM — MOSFETs.
Key Features
- Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
- 3 distinct suffix patternsExamples: 10LT4, 10T4, 20. Decode suffix meaning in the ordering notes under the variant table.
Target Applications
- MOSFETs — design-in and field replacement
- BOM scrub where only the base prefix is known but suffix is TBD
- Second-source checks when the original MPN is constrained
Ordering Variants
Compare 3 STB40NF part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.
| Part Number | Description | Manufacturer | Lifecycle | RoHS | Availability | Action |
|---|---|---|---|---|---|---|
| STB40NF10LT4 | 100V 40A N-CH MOSFET D2PAK, 33mR RdsOn | STMicroelectronics | Active | Compliant | In Stock | |
| STB40NF10T4 | 100V 50A N-CH MOSFET D2PAK Low Gate Charge | STMicroelectronics | Active | Compliant | In Stock | |
| STB40NF20 | 200V 40A N-Channel MOSFET D2PAK 45mR RdsOn | STMicroelectronics | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on STB40NF map to package, grade, and reel options.
How to Choose the Right STB40NF MOSFETs
Match the footprint first
Pull the exact package drawing for your MPN — base-number swaps fail most often at the footprint, not the schematic.
Electrical headroom
Compare voltage and current columns in the variant table. For STB40NF, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.
Temp grade letter matters
Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.
Copy the full MPN
Do not BOM only "STB40NF" — include the full suffix (e.g. 10LT4, 10T4, 20). RFQ with reel/tube preference and required date code.
Technical Specifications
Core parameters for STB40NF product family
Identity
Variant Parameters
Source STB40NF with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 3 ordering variants from STMicroelectronics. Our team supports active, EOL, and hard-to-find component sourcing.
- Original manufacturer parts with traceability options
- BOM upload and multi-line RFQ support
- Package, grade, and compliance verification
Frequently Asked Questions
Common technical questions about the STB40NF product family.