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SLD40-018

Littelfuse · TVS · P600

SLD40-018 from Littelfuse, in a P600. 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 A1 passive Bi-directional TVS terminal with no polarity (SLD40-018): reverse standoff voltage 40 V, breakdown 44.4-49.1 V at 10 mA, maximum clamping voltage 64.5 V at 79.1 A.
2 A2 passive Second bi-directional TVS terminal with no polarity and no cathode band (SLD40-018): interchangeable with the other lead, 2200 W peak pulse power at 10 µs x 150 ms.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package P600
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 44.4 49.1 V @ IT = 5.0 mA 2
Reverse Stand off Voltage VR 40 V 2
Maximum Reverse Leakage IR 10 µA @ VR 2
Maximum Peak Pulse Current Ipp 79.1 A 10μs x 1000μs exponential wave 2
Maximum Clamping Voltage VC 64.5 V @ IPP 2
Test Current IT 5 mA 2
Peak Pulse Power Dissipation PPPM 2200 W 10ms x 150ms Test Waveform 1
Peak Pulse Power Dissipation PPPM 5000 W 10μs x 1000μs Test Waveform 1
Steady State Power Dissipation PD 8 W on Infinite Heat Sink at TL=75ºC (Fig. 6) 1
Peak Forward Surge Current IFSM 600 A 8.3ms Single Half Sine Wave 1
Operating Junction and Storage Temperature Range TJ, TSTG -55 175 °C 1
Thermal Resistance Junction to Lead RθJL 8 °C/W Typical 1
Thermal Resistance Junction to Ambient RθJA 40 °C/W Typical 1
Breakdown Voltage Temperature Coefficient αT 0.1 % VBR @ TJ = VBR@25°C x (1+αT x (TJ-25)), typical value 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 tin • Matte tin lead-free plated • Halogen free and RoHS 1

CAD (KiCad official)

  • Symbol: SLD40-018
  • Footprint: Diode_THT:D_P600_R-6_P20.00mm_Horizontal
  • 3D model: P600 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Littelfuse datasheet (5 pp, sha256 426d6c0ce0bdd466, retrieved 2026-10-26, 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