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XL1225

ALJ · Thyristors (SCR)/Modules · TO-92

XL1225 from ALJ, 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 KATHODE passive Cathode terminal of the XL1225 SCR; the datasheet rates the part for 400 V repetitive peak off-state voltage (VDRM/VRRM, RGK = 1 kΩ) and 0.8 A RMS on-state current at TC = 40°C.
2 GATE input Gate terminal used to trigger the SCR, with gate trigger current 200 µA and gate trigger voltage 0.8 V at VD = 7.0 V, and limits of 0.1 A peak gate current (10 µs max) and 150 mW peak gate power (20 ms max).
3 ANODE passive Anode terminal, the main current path of the SCR, which the datasheet rates for the same 400 V repetitive peak off-state voltage (RGK = 1 kΩ) and 0.8 A RMS on-state current.

Key specifications

Parameter Value
Manufacturer ALJ
Package TO-92
Category Transistors/Thyristors
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
Repetitive peak off-state voltages VDRM, VRRM 400 V Tj = 40 to 125°C (rgk = 1kΩ) 1
RMS on-state current IT(RMS) 0.8 A TC= 40°C 1
Average on-state current IT(AV) 0.5 V Half cycle = 180 TC=40°C 1
Peak Reverse Gate Voltage VGRM 1 A IGR = 10μA 1
Peak gate current IGM 0.1 A 10μs Max 1
Peak gate power PGM 150 mW 20ms Max 1
Junction Temperature Tj -40 125 °C 1
Storage Temperature Tstg -55 150 °C 1
Soldering Temperature TSLD 250 °C 6mm from case10s Max 1
Repetitive peak off-state current IDRM 0.1 mA VDRM (RGK = 1KΩ), Tj = 125°C 1
Repetitive peak off-state current IRRM 1 µA VDRM (RGK = 1KΩ), Tj = 25°C 1
Repetitive peak on-state voltage VT 1.4 V IT = 0.4A 1
Repetitive peak on-state voltage VT 2.2 V IT = 0.8A 1
On state threshold voltage VT(TO) 0.95 V Tj = 125°C 1
On state slope resistance Rt 600 m Tj = 125°C 1
Gate trigger current IGT 200 µA VD = 7.0V 1
Gate trigger voltage VGT 0.8 V VD = 7.0V 1
Holding current IH 5 mA RGK = 1KΩ 1
Latching current IL 6 mA RGK = 1KΩ 1

CAD (KiCad official)

  • Symbol: XL1225
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: xl1225-etched.step / xl1225-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); xl1225.step / xl1225.glb are the bare package body.

Provenance

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

  • Datasheet: ALJ datasheet (2 pp, sha256 d9483726769623f0, retrieved 2026-10-18, 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