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Junction Box

Junction Box

Automotive junction boxes come in two types: those using mechanical relays and those using MOSFETs as semiconductor relays.
To meet the needs of mechanical-relay drive applications, Toshiba has developed the SSM3K337R, a MOSFET in a small package (with 85% of the mounting area of the predecessor) that has active clamping circuitry for inductive loads. Toshiba also offers power MOSFETs in DPAK+ and TO-220SM (W) packages suitable for semiconductor relay applications.

System Block Diagram

System Block Diagram

Recommended Products

Block Type Package Part Number Polarity/Generation Feature
Mechanical Relay MOSFET SOT23F SSM3K337R Active Clamp Nch 38 V/2 A, 0.28Ω@4.5 V
UFM SSM3H137TU Nch + ZD 34 V/2 A, 0.28Ω@4.5 V
MOSFET + ZD PS8 TPCP8R01 60 V/2 A, 0.44Ω@4.0 V, VZ = 43 V
Semicon. Relay MOSFET DPAK+ TK100S04N1L Nch / VIII 40 V/100 A, 2.3 mΩ, Tch = 175°C
IPD PS-8 TPD7104AF BiCD process 1 ch high side Nch MOSFET Gate drive.
Power Supply Regulators SSOP20 TB9005FNG Single output (external transistors required), LDO (5 V), Watchdog timer, Topr: -40 to 125°C
SSOP16 TB9021FNG Single output (with integrated output transistors), LDO (5 V, 200 mA), Window-Watchdog timer, Topr: -40 to 125°C
BipTr New PW-Mold TTA005 PNP -50 V/-5 A/hFE 200 min
TTB002 -60V/-6A/hFE 100 min

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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.
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