IRF840 Vishay, IRF840 Datasheet - Page 7

• Manufacturer Part Number: IRF840
• Description: MOSFET N-CH 500V 8A TO-220AB
• Manufacturer: Vishay
• Type: Power MOSFETr

Specifications of IRF840

• Fet Type: MOSFET N-Channel, Metal Oxide
• Fet Feature: Standard
• Rds On (max) @ Id, Vgs: 850 mOhm @ 4.8A, 10V
• Drain To Source Voltage (vdss): 500V
• Current - Continuous Drain (id) @ 25° C: 8A
• Vgs(th) (max) @ Id: 4V @ 250µA
• Gate Charge (qg) @ Vgs: 63nC @ 10V
• Input Capacitance (ciss) @ Vds: 1300pF @ 25V
• Power - Max: 125W
• Mounting Type: Through Hole
• Package / Case: TO-220-3 (Straight Leads)
• Number Of Elements: 1
• Polarity: N
• Channel Mode: Enhancement
• Drain-source On-res: 0.85Ohm
• Drain-source On-volt: 500V
• Gate-source Voltage (max): ±20V
• Drain Current (max): 8A
• Power Dissipation: 125W
• Output Power (max): Not RequiredW
• Frequency (max): Not RequiredMHz
• Noise Figure: Not RequireddB
• Power Gain: Not RequireddB
• Drain Efficiency: Not Required%
• Operating Temp Range: -55C to 150C
• Operating Temperature Classification: Military
• Mounting: Through Hole
• Pin Count: 3 +Tab
• Package Type: TO-220AB
• Configuration: Single
• Transistor Polarity: N-Channel
• Resistance Drain-source Rds (on): 0.85 Ohms
• Drain-source Breakdown Voltage: 500 V
• Gate-source Breakdown Voltage: +/- 20 V
• Continuous Drain Current: 8 A
• Maximum Operating Temperature: + 150 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *IRF840; IRF840IR

Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon
Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and
reliability data, see http://www.vishay.com/ppg?91065.
Document Number: 91065
S-81275-Rev. A, 16-Jun-08
Re-applied
voltage
Reverse
recovery
current
+
-
R
G
D.U.T.
*
Driver gate drive
D.U.T. I
D.U.T. V
Inductor current
V
GS
= 5 V for logic level devices
P.W.
SD
DS
waveform
waveform
Peak Diode Recovery dV/dt Test Circuit
Ripple ≤ 5 %
Body diode forward drop
Period
Body diode forward
+
-
Fig. 14 - For N-Channel
• dV/dt controlled by R
• Driver same type as D.U.T.
• I
• D.U.T. - device under test
SD
Diode recovery
current
controlled by duty factor "D"
Circuit layout considerations
dV/dt
• Low stray inductance
• Ground plane
• Low leakage inductance
current transformer
dI/dt
D =
-
G
Period
P.W.
+
V
V
I
SD
GS
DD
= 10 V*
+
IRF840A, SiHF840A
-
V
DD
Vishay Siliconix
www.vishay.com
7