DS26002 Rev. 7 - 2
1 of 2
www.diodes.com
1N4933-1N4937
© Diodes Incorporated
1N4933 - 1N4937
1.0A FAST RECOVERY RECTIFIER
Features
• Diffused Junction
• Fast Switching for High Efficiency
• High Current Capability and Low Forward Voltage Drop
• Surge Overload Rating to 30A Peak
• Low Reverse Leakage Current
• Lead Free Finish, RoHS Compliant (Note 4)
Mechanical Data
• Case: DO-41
• Case Material: Molded Plastic. UL Flammability Classification Rating
94V-0
• Moisture Sensitivity: Level 1 per J-STD-020D
• Terminals: Finish - Bright Tin. Plated Leads Solderable per MIL-
STD-202, Method 208
• Polarity: Cathode Band
• Mounting Position: Any
• Ordering Information: See Page 2
• Marking: Type Number
• 0.35 grams (approximate)
Dim DO-41 Plastic
Min Max
A 25.40 ⎯
B 4.06 5.21
C 0.71 0.864
D 2.00 2.72
All Dimensions in mm
Maximum Ratings and Electrical Characteristics @TA = 25°C unless otherwise specified
Single phase, half wave, 60Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
Characteristic Symbol 1N4933 1N4934 1N4935 1N4936 1N4937 Unit
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage (Note 5)
VRRM
VRWM
VR 50 100 200 400 600 V
RMS Reverse Voltage VR(RMS) 35 70 140 280 420 V
Average Rectified Output Current (Note 1) @ TA = 75°C IO 1.0 A
Non-Repetitive Peak Forward Surge Current 8.3ms
Single Half Sine-Wave Superimposed on Rated Load IFSM 30 A
Forward Voltage Drop @ IF = 1.0A VFM 1.2 V
Peak Reverse Current @TA = 25°C
at Rated DC Blocking Voltage (Note 5) @ TA = 100°C IRM 5.0
100 μA
Reverse Recovery Time (Note 3) trr 200 ns
Typical Total Capacitance (Note 2) CT 15 pF
Typical Thermal Resistance Junction to Ambient RθJA 100 °C/W
Operating and Storage Temperature Range TJ, TSTG -65 to +150 °C
Notes: 1. Leads maintained at ambient temperature at a distance of 9.5mm from the case.
2. Measured at 1.0MHz and applied reverse voltage of 4.0V DC.
3. Measured with IF = 0.5A, IR = 1A, Irr = 0.25A.
4. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.
5. Short duration pulse test used to minimize self-heating effect.
DS26002 Rev. 7 - 2
2 of 2
www.diodes.com
1N4933-1N4937
© Diodes Incorporated
025 50 75 100 125 150 175
0.2
0.4
0.6
0.8
1.0
0
I, AVE
R
A
G
E
F
O
R
WA
R
D
R
E
C
T
I
F
IED
C
U
R
R
EN
T
(A)
(AV)
T , A MBIENT T EMPERATURE (ºC)
Fig. 1 Forward Current Derating Curve
A
PC Board Mounted
9.5mm Lead Lengths
0.6 0.8 1.0 1.2 1.4 1.6
0.01
0.1
1.0
10
20
V , INSTANTANEOUS FORW ARD VOLTAGE (V)
Fig. 2 T ypical Forward Characteristics
F
I, INS
T
AN
T
ANE
O
U
S F
O
R
WA
R
D
C
U
R
R
EN
T
(A)
F
T = 25°C
Pulse Width = 300µs
j
110
100
0
NUMBER OF CYCLES A T 6 0 Hz
Fig. 3 Max Non-Repetitive Peak Forward Surge Current
I,
P
EAK F
O
R
WA
R
D S
U
R
G
E
C
U
R
R
EN
T
(A)
FSM
10
20
30
Pulse Width
8.3ms Single Half
Sine-Wave
110100
1
10
100
C
T
O
T
AL
C
A
P
A
C
I
T
AN
C
E (p
F
)
T
V , DC REVERSE VOLTAGE (V)
Fig. 4 T ypical Total Capacitance
R
Ordering Information (Note 6)
Device Packaging Shipping
1N4933-T DO-41 5K/Tape & Reel, 13-inch
1N4934-T DO-41 5K/Tape & Reel, 13-inch
1N4935-T DO-41 5K/Tape & Reel, 13-inch
1N4936-T DO-41 5K/Tape & Reel, 13-inch
1N4937-T DO-41 5K/Tape & Reel, 13-inch
Notes: 6. For packaging details, visit our website at http://www.diodes.com/datasheets/ap02008.pdf.
IMPORTANT NOTICE
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without further notice to any product herein. Diodes Incorporated does not assume an y liability arising out of the application or use of any product
described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall
assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website,
harmless against all damages. LIFE SUPPORT
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written
approval of the President of Diodes Incorporated.
