component
SM4185T9RL
Public Made by Adomby adom
SPS MOSFETs, TO-252. 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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README
markdownSM4185T9RL
SPS · MOSFETs · TO-252
SM4185T9RL from SPS, in a TO-252. 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 | G | input | Gate; gate-source voltage limit is ±20 V, with a threshold of -1.0 to -2.2 V at ID = -250µA. |
| 2 | D | passive | Drain (center lead, shown connected to the drain tab); drain-source voltage rating is -40 V and continuous drain current is -40 A at TC=25°C. |
| 3 | S | passive | Source of the P-channel MOSFET; continuous body-diode source current is -40 A at TC=25°C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | SPS |
| Package | TO-252 |
| 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 |
|---|---|---|---|---|---|---|---|
| Drain-Source Voltage | VDS | -40 | V | TA = 25°C | 1 | ||
| Gate-Source Voltage | VGS | -20 | 20 | V | TA = 25°C | 1 | |
| Continuous Drain Current | ID | -40 | A | TC=25°C | 1 | ||
| Continuous Drain Current | ID | -22 | A | TC=100°C | 1 | ||
| Pulsed Drain Current | IDM | -140 | A | Repetitive rating, pulse width limited by TJ(MAX)=150°C | 1 | ||
| Single Pulse Avalanche Energy | EAS | 57.8 | mJ | VDD=-25V, VGS=-10V, L=0.1mH, IAS=-34A | 1 | ||
| Total Power Dissipation | PD | 40.3 | W | TC=25°C | 1 | ||
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 | 150 | °C | 1 | ||
| Thermal Resistance Junction-to-Ambient | RθJA | 66 | °C/W | 1 inch2 FR-4 board with 2OZ copper | 1 | ||
| Thermal Resistance Junction-to-Case | RθJC | 3.1 | °C/W | 1 | |||
| Drain-Source Breakdown Voltage | V(BR)DSS | -40 | V | VGS = 0V, ID = -250µA | 2 | ||
| Gate-body Leakage current | IGSS | -100 | 100 | nA | VDS = 0V, VGS = ±20V | 2 | |
| Zero Gate Voltage Drain Current | IDSS | -1 | µA | VDS = -40V, VGS = 0V, TJ=25℃ | 2 | ||
| Zero Gate Voltage Drain Current | IDSS | -100 | µA | VDS = -40V, VGS = 0V, TJ=100℃ | 2 | ||
| Gate-Threshold Voltage | VGS(th) | -1 | -1.5 | -2.2 | V | VDS = VGS, ID = -250µA | 2 |
| Drain-Source On-Resistance | RDS(on) | 13.5 | 19 | mΩ | VGS = -10V, ID = -20A | 2 | |
| Drain-Source On-Resistance | RDS(on) | 19.5 | 25 | mΩ | VGS = -4.5V, ID = -15A | 2 | |
| Diode Forward Voltage | VSD | -1.2 | V | IS = -20A, VGS = 0V | 2 | ||
| Continuous Source Current | IS | -40 | A | TC=25°C | 2 | ||
| Forward Transconductance | gfs | 44 | S | VDS = -10V, ID = -20A | 2 | ||
| Input Capacitance | Ciss | 2525 | pF | VDS = -20V, VGS =0V, f =1MHz | 2 | ||
| Output Capacitance | Coss | 190 | pF | VDS = -20V, VGS =0V, f =1MHz | 2 | ||
| Reverse Transfer Capacitance | Crss | 172 | pF | VDS = -20V, VGS =0V, f =1MHz | 2 | ||
| Gate Resistance | Rg | 10 | Ω | f =1MHz | 2 | ||
| Total Gate Charge | Qg | 35 | nC | VGS = -10V,VDS = -20V, ID= -20A | 2 | ||
| Gate-Source Charge | Qgs | 5.5 | nC | VGS = -10V,VDS = -20V, ID= -20A | 2 | ||
| Gate-Drain Charge | Qgd | 8 | nC | VGS = -10V,VDS = -20V, ID= -20A | 2 | ||
| Turn-On Delay Time | td(on) | 14.5 | ns | VGS = -10V, VDD = -20V, RG = 3Ω, ID= -20A | 2 | ||
| Rise Time | tr | 20.2 | ns | VGS = -10V, VDD = -20V, RG = 3Ω, ID= -20A | 2 | ||
| Turn-Off Delay Time | td(off) | 32 | ns | VGS = -10V, VDD = -20V, RG = 3Ω, ID= -20A | 2 | ||
| Fall Time | tf | 10 | ns | VGS = -10V, VDD = -20V, RG = 3Ω, ID= -20A | 2 |
CAD (KiCad official)
- Symbol:
SM4185T9RL - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files:
sm4185t9rl-etched.step/sm4185t9rl-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sm4185t9rl.step/sm4185t9rl.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: SPS datasheet (6 pp, sha256
8e1320e771bfa688, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).