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SMWB Series
MIL-STD-981, MIL-T-55631

Wideband RF Transformer

FEATURES

  • Low EMI Radiation

  • Low Thermal Expansion permits mounting on most substrate materials

  • Custom Designs: Other electrical configurations and performance characteristics are available in various sizes and package types

SPECIFICATIONS

  • Frequency Response: 500 kHz to 350 MHz

  • Power Rating: 250 mW

  • Operating Temperature Range: -55°C to 125°C

  • Temperature Rise (at 90°C): 35°C

  • Dielectric Withstanding Voltage: 300 VAC

  • Moisture, Shock, and Immersion Resistant

  • Terminals meets solderability per MIL-STD-202, Method 208

  • Welded Connections, Transfer Molded Package

  • Outgassing meets NASA spec  SP-R-0022A: TML < 1% 

  • Meets the requirements of MIL-T-55631 and MIL-STD-981, class S or class B
    Class S parts are intended for critical flight and mission-essential ground support applications and any application that is critical to safety.
    Class B parts are for use in non-flight and non-mission-essential ground support applications.

    Part or Identifying Number (PIN):
    SMWBxxxxS: MIL-STD-981, Class S
    SMWBxxxxB: MIL-STD-981, Class B

ELECTRICAL CHARACTERISTICS

Configuration

Impedance
Ratio
Pri : Sec

Max

Insertion

Loss @50

MHz (dB)

Part

Number

Max
VSWR

@50 MHz

Min Brandwidth (MHz)

0.5 db

(Ripple)

3 dB Points

SMWB1000 Series

SMWB2000 Series

SMWB1010

SMWB1015

SMWB1020

SMWB1040

SMWB1016

SMWB3000 Series

SMWB2010

SMWB2015

SMWB2020

SMWB2040

SMWB2016

SMWB3010

SMWB3015

SMWB3020

SMWB3040

SMWB3016

1 : 1

1 : 1.5

1 : 1.6

1 : 2

1 : 4

1 : 1

1 : 1.5

1 : 2

1 : 4

1 : 1.6

1 : 1

1 : 1.5

1 : 2

1 : 4

1 : 1.6

0.9

1.7

1.3

1.1

1.5*

0.7

1.5

1.1

0.9

1.2*

0.7

1.5

1.1

0.9

1.2*

1.35

1.65

1.40

1.25

1.95*

1.30

1.60

1.35

1.20

1.70*

1.30

1.60

1.35

1.20

1.70*

12 - 35

3.0 - 85

8.0 - 70

4.0 - 130

7.0 - 100

12 - 25

12 - 35

2.0 - 150

2.0 - 150

2.0 - 100

2.0 - 100

6.0 - 90

6.0 - 90

5.0 - 130

5.0 - 130

1.2 - 350

4.0 - 170

0.9 - 200

1.0 - 250

2.5 - 110

1.0 - 390

3.0 - 200

0.5 - 230

0.8 - 300

2.0 - 140

1.0 - 390

3.0 - 200

0.5 - 230

0.8 - 300

2.0 - 140

*Measured at 15 MHz