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S8X5ECS

Public Made by Adom

by adom

Littelfuse TRIACs, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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S8X5ECS

Littelfuse · TRIACs · TO-92

S8X5ECS from Littelfuse, in a TO-92. 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 Gate input Sensitive gate for direct microprocessor interface, with IGT of 20 to 100 µA and minimum peak reverse gate voltage VGRM of 8 V.
2 Anode passive Center anode main terminal of the TO-92 package (code EC), rated for repetitive blocking voltage VDRM/VRRM up to 800 V.
3 Cathode passive Main cathode terminal carrying the on-state current, rated at RMS on-state current IT(RMS) of 0.5 A with TJ from -40 to 125 °C.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package TO-92
Category Triode/MOS Tube/Transistor
Pins 3

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
DC Gate Trigger Current IGT 20 100 μA VD = 6V RL = 100 Ω 2
DC Gate Trigger Voltage VGT 0.8 V VD = 6V RL = 100 Ω 2
Peak Reverse Gate Voltage VGRM 8 V IRG = 10μA 2
Holding Current IH 3 mA RGK = 1 KΩ Initial Current = 20mA 2
Critical Rate-of-Rise of Off-State Voltage dv/dt 40 V/μs TJ = 125°C VD = 67% of VDRM Exp. Waveform RGK = 1 kΩ 2
Gate Non-Trigger Voltage VGD 0.2 V VD = 1/2 VDRM RGK = 1 kΩ TJ = 125°C 2
Turn-Off Time tq 35 μs IT = 0.5A 2
Peak On-State Voltage VTM 1.8 V 0.5A device ITM = 4A tp = 380 μs 2
Threshold Voltage VT0 1.03 V 2
Dynamic Resistance RD 106 mΩ 2
Off-State Current, Peak Repetitive IDRM / IRRM 3 μA TJ = 25°C 2
Off-State Current, Peak Repetitive IDRM / IRRM 500 μA TJ = 125°C 2
Storage junction temperature range Tstg -40 150 °C 1
Operating junction temperature range TJ -40 125 °C 1
RMS on-state current (full sine wave) IT(RMS) 0.5 A TC = 85°C 1
Average on-state current IT(AV) 0.3 A TC = 85°C 1
Non repetitive surge peak on-state current ITSM 10 A Sine half wave, TJ initial = 25°C F = 50Hz 1
Non repetitive surge peak on-state current ITSM 12 A Sine half wave, TJ initial = 25°C F = 60Hz 1
I2t Value for fusing I2t 0.5 A2s tp = 10 ms F = 50 Hz 1
Critical rate of rise of on-state current di/dt 80 A/µs IG = 10mA TJ = 125°C 1
Peak Gate Current IGM 0.5 A tp = 20 μs TJ = 125°C 1
Average gate power dissipation PG(AV) 0.2 W TJ = 125°C 1
Peak repetitive off-state voltage VDRM/VRRM 800 V 1
Non-repetitive direct surge peak off-state voltage VDSM 1250 V tp = 50 μs 1
Non-repetitive reverse surge peak off-state voltage VRSM 900 V tp = 50 μs 1
Junction to case (AC) Rth(JC) 35 °C/W IT = 0.8A (RMS) 2
Junction to ambient Rth(j-a) 150 °C/W IT = 0.8A (RMS) 2

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 Terminal Finish 100% Matte Tin-plated. Body Material UL Recognized compound meeting flammability 5

CAD (KiCad official)

  • Symbol: S8X5ECS
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: s8x5ecs-etched.step / s8x5ecs-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); s8x5ecs.step / s8x5ecs.glb are the bare package body.

Provenance

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

  • Datasheet: Littelfuse datasheet (6 pp, sha256 f57b2d91d9172dd4, retrieved 2026-10-29, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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