This product is not recommended for design-in.
The recommended type is: BLS9G2731LS-400

LDMOS S-band radar power transistor

400 W LDMOS power transistor for S-band radar applications in the frequency range from 2.7 GHz to 3.1 GHz.

Features and benefits

  • High efficiency
  • Excellent ruggedness
  • Designed for S-band operation
  • Excellent thermal stability
  • Easy power control
  • Integrated dual sided ESD protection enables excellent off-state isolation
  • High flexibility with respect to pulse formats
  • Internally matched for ease of use
  • Compliant to Directive 2002/95/EC, regarding Restriction of Hazardous Substances (RoHS)


  • S-band radar applications in the frequent range 2.7 GHz to 3.1 GHz


All documentation

All documents

Design tool

RF Power Lifetime Calculator


LDMOS S-band radar power transistor



Symbol Parameter Conditions Min Typ/Nom Max Unit
frange frequency range 2700 3100 MHz
PL(1dB) nominal output power at 1 dB gain compression 400 W
Test signal: Pulsed RF
Gp power gain PL = 400 W; VDS = 32 V [0] 10.3 13 dB
RLin input return loss PL = 400 W; VDS = 32 V [0] -8 dB
ηD drain efficiency PL = 400 W; VDS = 32 V [0] 43 47 %
Pdroop(pulse) pulse droop power PL = 400 W [0] 0 0.5 dB
tr rise time PL = 400 W [0] 5 50 ns
tf fall time PL = 400 W; VDS = 32 V [0] 5 50 ns

Package / Packing

All type numbers in the table below are not recommended for design-in.

Type number Package Outline version Reflow-/Wave
Packing Product status Marking Orderable part number,
(Ordering code (12NC))
BLS8G2731LS-400P SOT539B
sot539b_po Bulk Pack Active Standard Marking BLS8G2731LS-400PU
(9340 682 22112)

Pinning info

Pin Symbol Description Simplified outline Graphic symbol
1 D1 drain1
2 D2 drain2
3 G1 gate1
4 G2 gate2
5 S source


All type numbers in the table below are not recommended for design-in.

Type number Orderable part number Chemical content RoHS / RHF Leadfree conversion date MSL MSL LF
Quality and reliability disclaimer

Ordering & availability

Type number Ordering code (12NC) Orderable part number Distributor Buy online Samples
BLS8G2731LS-400P 9340 682 22112 BLS8G2731LS-400PU DigiKey Buy Not available

Design support

Title Type Date
PCB Design BLS8G2731L(S)-400P (Data sheet) Design support 2015-05-29