BLF521
Download datasheetThis device has been transferred from Ampleon to Rochester Electronics.
UHF power MOS transistor
Silicon N-channel enhancement mode vertical D-MOS transistor designed for communications transmitter applications in the UHF frequency range.
Features and benefits
- High power gain
- Easy power control
- Gold metallization
- Good thermal stability
- Withstands full load mismatch
- Designed for broadband operation.
Applications
- Transmitter applications in the UHF frequency range
Parametrics
| Symbol | Parameter | Conditions | Min | Typ/Nom | Max | Unit |
|---|---|---|---|---|---|---|
| frange | frequency range | 100 | 500 | MHz | ||
| PL(1dB) | nominal output power at 1 dB gain compression | 2 | W | |||
| Test signal: CW | ||||||
| Gp | power gain | PL = 2 W; VDS = 12.5 V | 10 | 13 | dB | |
| ηD | drain efficiency | VDS = 12.5 V; f = 500 MHz; IDq = 10 mA | 50 | 60 | % | |
Package / Packing
| Type number | Package | Outline version | Packing | Product status | Marking |
Orderable part number, (Ordering code (12NC)) |
|---|---|---|---|---|---|---|
| BLF521 | CRDB4 (SOT172D) |
sot172d_po | Bulk Pack | Transferred | Standard Marking |
BLF521,112 (9339 785 00112) |
Pinning info
| Pin | Symbol | Description | Simplified outline | Graphic symbol |
|---|---|---|---|---|
| 1 | S | source |
|
|
| 2 | G | gate | ||
| 3 | D | drain | ||
| 4 | S | source |
Ordering & availability
| Type number | Ordering code (12NC) | Orderable part number | Distributor | Buy online | Samples |
|---|---|---|---|---|---|
| BLF521 | 9339 785 00112 | BLF521,112 | Rochester Electronics | Buy | Not available |
Documentation
| Title | Type | Date | |
|---|---|---|---|
| UHF power MOS transistor | Data sheet | 2015-11-30 | |
| Mounting and soldering of RF transistors in air cavity packages | Application note | 2025-02-03 | |
| RF power solutions for ISM, broadcast, navigation and safety radio applications | Brochure | 2025-02-12 | |
| RF power application reports for ISM, broadcast, navigation and safety radio applications | Brochure | 2024-10-08 | |
| Packages for RF power transistors | Leaflet | 2024-10-25 |
Design support
| Title | Type | Date | |
|---|---|---|---|
| BLF521 12 5 V 10 mA S-parameter data | S-parameter | 2012-06-08 | |
| BLF521 6 25 V 10 mA S-parameter data | S-parameter | 2012-06-08 |