component

SMCJ188CA

Public Made by Adom

by adom

UMW TVS, SMC. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

componentcircuit protectionsmcj188cafactory-2.0.0extractor-text

Changed since verified SMCJ188CA

by Ray · last 30 Oct 2026 · 1 record · files changed since
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier lcsc, 2 pinschanged since
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: SMCJ188CA · SMC · 2 pins
  • ✓copper: 2 copper pads, none touching another net
  • ✓datasheet: all 2 pin names found in the 7-page datasheet
  • •distributor (warn): no ['digikey'] number
  • ✓family: D_SMC
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-2odd_kj9/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.5)
  • ✓pads: 2 pins = 2 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 2 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files! smcj188ca.kicad_sym✓ smcj188ca.kicad_mod✓ smcj188ca.step
Spot something wrong? Report it as an issue Propose a fix Records are signed by members of adom.
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Ray Publish 0.1.0 253662a 8d ago

SMCJ188CA

UMW · TVS · SMC

SMCJ188CA 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 K passive Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint.
2 A passive Anode.

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 for Breakdown Voltage 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; non-repetitive current pulse, 10/1000 µs, TA=25°C 1
Peak Forward Surge Current IFSM 200 A per Fig. 5; mounted on 8.0 x 8.0mm copper pads 1
Junction and Storage Temperature Range TJ,TSTG -55 150 °C 1
Typical 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: SMCJ188CA
  • Footprint: Diode_SMD:D_SMC
  • 3D model: SMC (KiCad packages3D, STEP)
  • 3D model files: smcj188ca-etched.step / smcj188ca-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smcj188ca.step / smcj188ca.glb are the bare package body.

Provenance

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

  • Datasheet: UMW datasheet (7 pp, sha256 18a13b92c208d36f, retrieved 2026-10-30, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary cathode-band convention (convention), consensus off (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