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1.5KE43CA-B

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Littelfuse ESD And Surge Protection (TVS/ESD), DO-201. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

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1.5KE43CA-B

Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-201

1.5KE43CA-B from Littelfuse, in a DO-201. 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 Littelfuse
Package DO-201
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 VBR VBR 40.9 45.2 V @ IT = 1 mA 2
Maximum Clamping Voltage VC 59.3 V @ Ipp = 25.6 A 2
Maximum Peak Pulse Current Ipp 25.6 A 2
Maximum Reverse Leakage Current IR 1 µA @ VR = 36.80 V 2
Reverse Stand-off Voltage VR 36.8 V Maximum voltage that can be applied to the TVS without operation (definition, p.3) 2
Peak Pulse Power Dissipation (Single Die Parts) PPPM 1500 W 10/1000 µs test waveform (Fig.4), Note 1, derated above TJ(initial)=25°C per Fig.3 1
Steady State Power Dissipation on Infinite Heat Sink PD 6.5 W at TL = 75°C 1
Operating Junction and Storage Temperature Range TJ, TSTG -55 175 °C 1
Typical Thermal Resistance Junction to Lead RθJL 15 °C/W 1
Typical Thermal Resistance Junction to Ambient RθJA 75 °C/W 1
Temperature Coefficient of VBR (αT) αT 0.1 % Typical value; VBR@TJ = VBR@25°C x (1+αT x (TJ-25)) 1

CAD (KiCad official)

  • Symbol: 1.5KE43CA-B
  • Footprint: Diode_THT:D_DO-201AD_P15.24mm_Horizontal
  • 3D model: DO-201 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Littelfuse datasheet (6 pp, sha256 4290e23a327d9203, retrieved 2026-10-15, 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