BLF861A
Download datasheet
This product has been discontinued.
Click here for discontinuation information.
The replacement is: BLF984P
The replacement is: BLF984P
UHF power LDMOS transistor
Silicon N-channel enhancement mode lateral D-MOS push-pull transistor in a SOT540A package with ceramic cap. The common source is connected to the mounting flange.
Features and benefits
- High power gain
- Easy power control
- Excellent ruggedness
- Designed to withstand abrupt load mismatch errors
- Source on underside eliminates DC isolators; reducing common mode inductance
- Designed for broadband operation (UHF band)
- Internal input and output matching
Applications
- Communication transmitter applications in the UHF frequency range
Parametrics
| Symbol | Parameter | Conditions | Min | Typ/Nom | Max | Unit |
|---|---|---|---|---|---|---|
| frange | frequency range | 470 | 860 | MHz | ||
| PL(1dB) | nominal output power at 1 dB gain compression | 150 | W | |||
| Gp | power gain | PL = 150 W; VDS = 32 V | 13.5 | 14 | dB | |
| ηD | drain efficiency | PL = 150 W; VDS = 32 V; f = 860 Hz; IDq = 1000 mA | 50 | 60 | % | |
| PL | output power | 150 | W |
Package / Packing
All type numbers in the table below are discontinued.
| Type number |
Package type, (Package outline) |
Outline version | Packing | Product status | Marking |
Orderable part number, (Ordering code (12NC)) |
|---|---|---|---|---|---|---|
| BLF861A | SOT540 (SOT540A) |
sot540a_po | Bulk Pack | Withdrawn | Standard Marking |
BLF861A,112 (934056499112) |
Discontinuation information
| Type number | 12NC | OPN | LTB date | LTD date | Replacement | DN notice | Product status |
|---|---|---|---|---|---|---|---|
| BLF861A | 934056499112 | BLF861A,112 | 2014-03-31 | 2014-06-30 | BLF984P | 201306022DN | Withdrawn |
Pinning info
| Pin | Symbol | Description | Simplified outline | Graphic symbol |
|---|---|---|---|---|
| 1 | D1 | drain1 |
|
|
| 2 | D2 | drain2 | ||
| 3 | G1 | gate1 | ||
| 4 | G2 | gate2 | ||
| 5 | S | source |
Documentation
| Title | Type | Date | |
|---|---|---|---|
| UHF power LDMOS 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 | 2026-04-17 | |
| RF power application reports for ISM, broadcast, navigation and safety radio applications | Brochure | 2026-04-17 | |
| Packages for RF power transistors | Leaflet | 2026-04-17 |
No documentation available.