IRF3205 Reference Tables, Pins & Specifications

Pin reference

Signal names, electrical functions and connection guidance

TO-220AB

Physical pin numbers3 pins

Scroll within the table to see all columns and rows.

IRF3205 pin functions and connections
Signal	Type	Function & connection
G	Gate	Insulated control terminal that must be charged and discharged. Connection guidance Use a gate driver, series resistor and gate-to-source pull-down. Threshold is 2–4 V at only 250 µA. The 8 mΩ maximum on-resistance is specified at 10 V gate drive and 62 A, not at 3.3 V logic.
D	Drain	Connects to the controlled load in a low-side N-channel switch. Connection guidance Place the load between its positive supply and drain pin 2. The exposed metal tab is drain. The body diode has its cathode at drain.
S	Source	Return terminal and reference for gate voltage. Connection guidance Connect to common ground in the pictured low-side circuit. The body diode has its anode at source. Keep the driver return close to this terminal.

Two manufacturer-hosted references

Manufacturer-referenced values5 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Through-hole	IRF3205PbF · TO-220AB	Rev. 2.1 · 21 July 2026
Surface-mount	IRF3205SPbF · D2PAK	PD95106 · 11 March 2004
Physical terminals	G1 · D2 · S3	Tab and thermal pad are electrically drain
Gate drive	RDS(on) specified at 10 V	No guaranteed 3.3 V / 5 V on-resistance in these references
Mounting	Through-hole or surface-mount as selected	Do not surface-mount the TO-220 leads as if they were D2PAK

Review exact orderable availability separately from this reference.

Case temperature and pulse conditions matter

Manufacturer-referenced values8 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Drain-source breakdown	55 V minimum	VGS 0 V; ID 250 µA
Continuous current at 25 / 100°C case	110 / 80 A	VGS 10 V; apply package limit and SOA
Package current limit	75 A	110 A is calculated from junction temperature; package limit remains binding
Pulsed drain current	390 A	Pulse width limited by junction temperature
Case-cooled power	200 W	Case at 25°C
Power derating	1.3 W/°C	Above 25°C case temperature
Gate-source limit	±20 V	Absolute maximum
Junction / storage	−55 to +175°C	Absolute ranges

Do not combine individual maximum ratings into one operating point.

25°C; pulse ≤400 µs and duty ≤2% where specified

Manufacturer-referenced values6 parameters

Scroll within the table to see all columns and rows.

Temperature-dependent resistance must be considered in a real load stage.

Explicit driver and load test conditions

Manufacturer-referenced values4 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Qg / Qgs / Qgd	146 / 35 / 54 nC maximum	ID 62 A; VDS 44 V; VGS 10 V
Delay-on / rise / delay-off / fall	14 / 101 / 50 / 65 ns typical	VDD 28 V; ID 62 A; RG 4.5 Ω; VGS 10 V
Ciss / Coss / Crss	3247 / 781 / 211 pF typical	VGS 0 V; VDS 25 V; 1 MHz
Drive requirement	Source and sink gate charge	A threshold voltage does not describe gate-drive current

Different gate resistance and load conditions produce different switching waveforms.

Selected references use separate ambient conditions

Manufacturer-referenced values8 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Body diode	Anode source; cathode drain	Intrinsic reverse-current path
Forward drop	1.3 V maximum	IS 62 A; VGS 0 V; TJ 25°C
Recovery time typical / maximum	69 / 104 ns	IF 62 A; di/dt 100 A/µs
Recovery charge typical / maximum	143 / 215 nC	Same recovery conditions
Junction-to-case	0.75°C/W maximum	Both selected references
TO-220 junction-to-ambient	62°C/W maximum	Manufacturer reference condition
D2PAK junction-to-ambient	40°C/W maximum	Mounted on 1-inch-square FR-4 / G-10 PCB
Case-to-sink	0.50°C/W typical	TO-220 flat, greased interface

A case-cooled power rating is not a free-air rating.

Illustrative constant-resistance model

Manufacturer-referenced values7 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Load / source return	100 Ω, at least 3 W / common ground	Supply to drain; source to ground
Gate driver	0 / 12 V push-pull output	100 Ω series gate resistor; 100 kΩ gate-source pull-down
Steady gate voltage	About 11.99 V	Divider included; ideal driver and negligible leakage
Channel resistance	8 mΩ	Teaching model using the published 25°C maximum test point
Load current / channel drop	119.99 mA / 0.96 mV	12/(100+RDS); I × RDS
Channel / load loss	0.115 mW / 1.440 W	I²R; switching and hot-resistance losses omitted
Inductive load	Needs its own flyback path	The pictured resistor is not an inductive load

These are calculated values, not measured or live simulation readings.