component

SMCJ188A

Public Made by Adom

by adom

UMW TVS, SMC. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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SMCJ188A

UMW · TVS · SMC

SMCJ188A from UMW, in a SMC. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Cathode passive Cathode terminal of the unidirectional SMCJ188A TVS diode, marked by the color band on the case; VWM 188V, VBR 209V min to 231V max, VC 328V at IPPM 4.60A.
2 Anode passive Anode terminal of the unidirectional SMCJ188A TVS diode, the end opposite the color band, with 1500W peak pulse power (10/1000µs) capability.

Key specifications

Parameter Value
Manufacturer UMW
Package SMC
Category Circuit Protection
Pins 2

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Breakdown Voltage (min) VBR 209 231 V at IT = 1.0 mA 3
Test Current IT 1 mA 3
Working Peak Reverse Voltage VWM 188 V 3
Maximum Reverse Leakage IR 5 µA at VWM 3
Maximum Peak Pulse Surge Current IPPM 4.6 A 3
Maximum Clamping Voltage VC 328 V at IPPM 3
Peak Pulse Power Dissipation PPPM 1500 W Minimum 1500; non-repetitive, 1ms 1
Peak Forward Surge Current IFSM 200 A per Fig. 5 1
Maximum Instantaneous Forward Voltage VF 3.5 V at 50.0A, unidirectional only 1
Junction and Storage Temperature Range TJ,TSTG -55 150 °C 1
Thermal Resistance, Junction to Ambient RθJA 75 °C/W Mounted on minimum recommended pad layout 1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper (2) Mounted on 0.31 x 0.31” (8.0 x 8.0mm) copper pads to each terminal. 1

CAD (KiCad official)

  • Symbol: SMCJ188A
  • Footprint: Diode_SMD:D_SMC
  • 3D model: SMC (KiCad packages3D, STEP)
  • 3D model files: smcj188a-etched.step / smcj188a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smcj188a.step / smcj188a.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: UMW datasheet (7 pp, sha256 887bcda70cdf8617, retrieved 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF