component
S8X5ECS
Public Made by Adomby adom
Littelfuse TRIACs, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownS8X5ECS
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);s8x5ecs.step/s8x5ecs.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).