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LR7843-VB

Public Made by Adom

by adom

VBsemi Elec MOSFETs, TO-252. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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LR7843-VB

VBsemi Elec · MOSFETs · TO-252

LR7843-VB from VBsemi Elec, 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 of the N-channel MOSFET; gate-source voltage is rated at ±20 V maximum, with threshold of 1.5 to 2.5 V at ID = 250 µA.
2 D passive Drain of the N-channel MOSFET (also the mounting tab); VDS is rated at 30 V with continuous current up to 120 A at TC = 25 °C (package limited to 90 A).
3 S passive Source of the N-channel MOSFET; continuous source-drain body diode current is 90 A at TC = 25 °C.

Key specifications

Parameter Value
Manufacturer VBsemi Elec
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 30 V TA = 25 °C 1
Gate-Source Voltage VGS -20 20 V TA = 25 °C 1
Pulsed Drain Current IDM 200 A TA = 25 °C 1
Continuous Drain Current ID 120 A TC = 25 °C, TJ = 175 °C 1
Continuous Drain Current ID 98 A TC = 70 °C, TJ = 175 °C 1
Single Pulse Avalanche Energy EAS 94.8 mJ L = 0.1 mH 1
Maximum Power Dissipation PD 250 W TC = 25 °C 1
Maximum Power Dissipation PD 175 W TC = 70 °C 1
Operating Junction and Storage Temperature Range TJ, Tstg -55 175 °C 1
Junction-to-Ambient Thermal Resistance RthJA 32 40 °C/W t ≤ 10 sec 1
Junction-to-Case Thermal Resistance RthJC 0.5 0.6 °C/W Steady State 1
Drain-Source Breakdown Voltage VDS 30 V VGS = 0 V, ID = 250 µA 2
VDS Temperature Coefficient ΔVDS/TJ 35 mV/°C ID = 250 µA 2
VGS(th) Temperature Coefficient ΔVGS(th)/TJ -7.5 mV/°C ID = 250 µA 2
Gate-Source Threshold Voltage VGS(th) 1.5 2.5 V VDS = VGS, ID = 250 µA 2
Gate-Source Leakage IGSS -100 100 nA VDS = 0 V, VGS = ± 20 V 2
Zero Gate Voltage Drain Current IDSS 1 µA VDS = 30 V, VGS = 0 V 2
Zero Gate Voltage Drain Current IDSS 10 µA VDS = 30 V, VGS = 0 V, TJ = 55 °C 2
On-State Drain Current ID(on) 90 A VDS ≥ 5 V, VGS = 10 V 2
Drain-Source On-State Resistance RDS(on) 0.0023 Ω VGS = 10 V, ID = 38.8 A 2
Drain-Source On-State Resistance RDS(on) 0.0032 Ω VGS = 4.5 V, ID = 37 A 2
Forward Transconductance gfs 160 S VDS = 15 V, ID = 38.8 A 2
Input Capacitance Ciss 6201 pF VDS = 15 V, VGS = 0 V, f = 1 MHz 2
Output Capacitance Coss 1725 pF VDS = 15 V, VGS = 0 V, f = 1 MHz 2
Reverse Transfer Capacitance Crss 970 pF VDS = 15 V, VGS = 0 V, f = 1 MHz 2
Total Gate Charge Qg 171 257 nC VDS = 15 V, VGS = 10 V, ID = 38.8 A 2
Total Gate Charge Qg 81.5 123 nC VDS = 15 V, VGS = 4.5 V, ID = 28.8 A 2
Gate-Source Charge Qgs 34 nC 2
Gate-Drain Charge Qgd 29 nC 2
Gate Resistance Rg 1.4 2.1 Ω f = 1 MHz 2
Turn-On Delay Time td(on) 18 27 ns VDD = 15 V, RL = 0.625 Ω, VGEN = 10 V, Rg = 1 Ω 2
Rise Time tr 11 17 ns VDD = 15 V, RL = 0.625 Ω, VGEN = 10 V, Rg = 1 Ω 2
Turn-Off Delay Time td(off) 70 105 ns VDD = 15 V, RL = 0.625 Ω, VGEN = 10 V, Rg = 1 Ω 2
Fall Time tf 10 15 ns VDD = 15 V, RL = 0.625 Ω, VGEN = 10 V, Rg = 1 Ω 2
Turn-On Delay Time td(on) 55 83 ns VDD = 15 V, RL = 0.67 Ω, VGEN = 4.5 V, Rg = 1 Ω 2
Rise Time tr 180 270 ns VDD = 15 V, RL = 0.67 Ω, VGEN = 4.5 V, Rg = 1 Ω 2
Turn-Off Delay Time td(off) 55 83 ns VDD = 15 V, RL = 0.67 Ω, VGEN = 4.5 V, Rg = 1 Ω 2
Fall Time tf 12 18 ns VDD = 15 V, RL = 0.67 Ω, VGEN = 4.5 V, Rg = 1 Ω 2
Continuous Source-Drain Diode Current IS 120 A TC = 25 °C 2
Pulse Diode Forward Current ISM 120 A 2
Body Diode Voltage VSD 0.8 1.2 V IS = 22 A 2
Body Diode Reverse Recovery Time trr 52 78 ns IF = 20 A, di/dt = 100 A/µs, TJ = 25 °C 2
Body Diode Reverse Recovery Charge Qrr 70.2 105 nC IF = 20 A, di/dt = 100 A/µs, TJ = 25 °C 2
Reverse Recovery Fall Time ta 27 ns IF = 20 A, di/dt = 100 A/µs, TJ = 25 °C 2
Reverse Recovery Rise Time tb 25 ns IF = 20 A, di/dt = 100 A/µs, TJ = 25 °C 2

CAD (KiCad official)

  • Symbol: LR7843-VB
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)
  • 3D model files: lr7843-vb-etched.step / lr7843-vb-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lr7843-vb.step / lr7843-vb.glb are the bare package body.

Provenance

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

  • Datasheet: VBsemi Elec datasheet (7 pp, sha256 8e22e75c54cac5ff, retrieved 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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