Product Summary

The irf840a is a SMPS MOSFET. The applications of the irf840a include Switch Mode Power Supply (SMPS), Uninterruptable Power Supply, High speed power switching, Lead-Free.

Parametrics

irf840a absolute maximum ratings: (1)ID @ TC = 25℃ Continuous Drain Current, VGS @ 10V: 8.0 A; (2)ID @ TC = 100℃ Continuous Drain Current, VGS @ 10V: 5.1 A; (3)Pulsed Drain Current, IDM: 32 A; (4)PD @TC = 25℃ Power Dissipation: 125 W; (5)Linear Derating Factor: 1.0 W/℃; (6)Gate-to-Source Voltage, VGS: ±30 V; (7)Peak Diode Recovery dv/dt, dv/dt: 5.0 V/ns; (8)Operating Junction and Storage Temperature Range, TJ, TSTG: -55 to + 150℃; (9)Soldering Temperature, for 10 seconds: 300 (1.6mm from case)℃; (10)Mounting torqe, 6-32 or M3 screw: 10 lbf·in (1.1N·m).

Features

irf840a features: (1)Low Gate Charge Qg results in Simple Drive Requirement; (2)Improved Gate, Avalanche and dynamic dv/dt Ruggedness; (3)Fully Characterized Capacitance and Avalanche Voltage and Current; (4)Effective Coss Specified (See AN1001).

Diagrams

irf840a circuit diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
IRF840A
IRF840A
Vishay/Siliconix
MOSFET N-Chan 500V 8.0 Amp
Data Sheet
0-725: $1.91
725-1000: $1.84
1000-2000: $1.79
IRF840A, SiHF840A
IRF840A, SiHF840A
Other

Data Sheet
Negotiable 
IRF840ALPBF
IRF840ALPBF
Vishay/Siliconix
MOSFET N-Chan 500V 8.0 Amp
Data Sheet
0-1: $1.34
1-10: $1.18
10-100: $1.06
100-250: $0.99
IRF840APBF
IRF840APBF
Vishay/Siliconix
MOSFET N-Chan 500V 8.0 Amp
Data Sheet
0-1: $0.93
1-10: $0.74
10-100: $0.65
100-250: $0.57
IRF840AL
IRF840AL
Vishay/Siliconix
MOSFET N-Chan 500V 8.0 Amp
Data Sheet
Negotiable 
IRF840A_R4944
IRF840A_R4944
Fairchild Semiconductor
MOSFET TO-220AB
Data Sheet
Negotiable 
IRF840ASTRLPBF
IRF840ASTRLPBF
Vishay/Siliconix
MOSFET N-Chan 500V 8.0 Amp
Data Sheet
0-1: $1.76
1-10: $1.40
10-25: $1.34
25-100: $1.28
IRF840ASPBF
IRF840ASPBF
Vishay/Siliconix
MOSFET N-Chan 500V 8.0 Amp
Data Sheet
0-1: $1.12
1-10: $0.97
10-100: $0.86
100-250: $0.84