# FM3957 SemiConductor - CASE: TO99 MAKE: National Semiconductor

**Manufacturer:** National Semiconductor  
**MPN:** `FM3957`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | National Semiconductor |
| Manufacturer name | National Semiconductor |
| Manufacturer | National Semiconductor |
| keywords | Buy FM3957, FM3957, FM3957 SemiConductor |
| moq | 1 |
| MPN | FM3957 |
| multiple | 1 |
| originalCurrency | {'currency': 'GBP'} |
| qtyInStock | 0 |
| SKU | FM3957 |
| snippet | FM3957 SemiConductor - CASE: TO99 MAKE: National Semiconductor |
| Case | TO99 |
| Type | SemiConductor |
| @Vds (V) | 20 |
| Vbr DSS | 50 |
| Vbr GSS | 50- |
| Max PD (W) | 500m |
| Ciss Max (F) | 4.0p |
| Derate (Amb) (W/?C) | 2.8m |
| gfs Max | 4.0m |
| gfs Min | 1.0m |
| Idss Max (A) | 5.0m |
| Igss Max (A) | 100p |
| Vp Max | 4.5 |
| Oper Temp (?C) Max | 200 |
| Pinout Equivalence Number | 7-18 |
| Surface Mounted Yes/No | NO |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Little Diode | FM3957 |  |  | None | 1 |

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Structured data: `/python/html6/product/500/65500000/65541000/part_--FM3957---NationalSemiconductor--db919fc353.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp