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Q4040J7TP

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Littelfuse Thyristors (SCR)/Modules, TO-218-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Q4040J7TP

Littelfuse · Thyristors (SCR)/Modules · TO-218-3

Q4040J7TP from Littelfuse, in a TO-218-3. 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 MT1 passive Main terminal 1, to which all device voltages and gate-trigger polarities are referenced (Figure 1); the datasheet gives no separate pin-number marking for this terminal.
2 MT2 passive Main terminal 2, the bidirectional switched terminal; the device is rated for VDRM/VRRM of 400 V for this 400 V variant and IT(RMS) of 40 A at TC = 75 °C.
3 Gate input Gate trigger input for Qxx40J7 (100 mA max IGT in quadrants I-III, 2.0 V max VGT at VD = 12 V); peak gate current is limited to 4 A (tp = 20 µs, TJ = 125 °C) and average gate power to 0.5 W.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package TO-218-3
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
Gate trigger current (I-II-III) IGT 100 mA VD = 12V, RL = 60 Ω, I, II, III 2
Gate trigger voltage (ALL quadrants) VGT 2 V VD = 12V, RL = 60 Ω, I, II, III 2
Gate non-trigger voltage VGD 0.2 V VD = VDRM, RL = 3.3 kΩ, TJ = 125°C, I, II, III 2
Holding current IH 100 mA IT = 400mA 2
Critical rate of rise of off-state voltage (400V) dv/dt 700 V/μs VD = VDRM, Gate Open, TJ = 125°C, 400V 2
Critical rate of rise of off-state voltage at commutation (dv/dt)c 50 V/µs (di/dt)c = 21.6 A/ms, TJ = 125°C 2
On-state voltage VTM 1.8 V ITM = 56.6A, tp = 380 µs, TJ = 25°C 3
Peak off-state current IDRM 20 µA VD = VDRM / VRRM, TJ = 25°C, 400-1000V 3
Peak off-state current IDRM 5 mA VD = VDRM / VRRM, TJ = 125°C, 400-800V 3
RMS on-state current (full sine wave) IT(RMS) 40 A TC = 75 °C 2
Peak non-repetitive surge on-state current ITSM 335 A Full cycle, TJ initial = 25°C; f = 50 Hz, t = 20 ms 2
Peak non-repetitive surge on-state current ITSM 400 A Full cycle, TJ initial = 25°C; f = 60 Hz, t = 16.7 ms 2
I2t value for fusing I2t 664 A2s tp = 8.3 ms 2
Critical rate of rise of on-state current di/dt 150 A/µs f = 120 Hz; TJ = 125 °C; IG = 2 x IGT, tr ≤ 100 ns 2
Peak gate trigger current IGTM 4 A tp = 20 µs; TJ = 125 °C 2
Average gate power dissipation PG(AV) 0.5 W TJ = 125 °C 2
Storage temperature range Tstg -40 150 °C 2
Operating junction temperature range TJ -40 125 °C 2
Thermal resistance, junction to case (AC) RθJ-C 0.95 °C/W Junction to case (AC), Qxx40J7 3

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 Lead Bend MIL-STD-750, M-2036 Cond E Terminal Finish 100% Matte Tin-plated. 6

CAD (KiCad official)

  • Symbol: Q4040J7TP
  • Footprint: Package_TO_SOT_THT:TO-218-3_Vertical
  • 3D model: TO-218-3 (KiCad packages3D, STEP)
  • 3D model files: q4040j7tp-etched.step / q4040j7tp-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); q4040j7tp.step / q4040j7tp.glb are the bare package body.

Provenance

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

  • Datasheet: Littelfuse datasheet (8 pp, sha256 bc762ef3ea031978, retrieved 2026-10-19, 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