This document provides specifications for the 1N4148 small signal fast switching diode. It includes key features such as being silicon epitaxial planar diodes that are electrically equivalent to 1N914 diodes. The document discusses mechanical data, absolute maximum ratings, thermal characteristics, electrical characteristics, typical characteristics, and package dimensions. It is a technical specification sheet that concisely summarizes the important details and parameters of the 1N4148 diode.

1. 1N4148
Vishay Semiconductors
Small Signal Fast Switching Diodes
Features
• Silicon epitaxial planar diodes
• Electrically equivalent diodes:
1N4148 - 1N914
• Compliant to RoHS Directive 2002/95/EC
and in accordance to WEEE 2002/96/EC
• Halogen-free according to IEC 61249-2-21
definition
Applications 94 9367
• Extreme fast switches
Mechanical Data
Case: DO-35
Weight: approx. 105 mg
Cathode band color: black
Packaging codes/options:
TR/10K per 13" reel (52 mm tape), 50K/box
TAP/10K per ammopack (52 mm tape), 50K/box
Parts Table
Part Ordering code Type marking Remarks
1N4148 1N4148-TAP or 1N4148-TR V4148 Ammopack/tape and reel
Absolute Maximum Ratings
Tamb = 25 °C, unless otherwise specified
Parameter Test condition Symbol Value Unit
Repetitive peak reverse voltage VRRM 100 V
Reverse voltage VR 75 V
Peak forward surge current tp = 1 µs IFSM 2 A
Repetitive peak forward current IFRM 500 mA
Forward continuous current IF 300 mA
Average forward current VR = 0 IFAV 150 mA
l = 4 mm, TL = 45 °C Ptot 440 mW
Power dissipation
l = 4 mm, TL  25 °C Ptot 500 mW
Thermal Characteristics
Tamb = 25 °C, unless otherwise specified
Parameter Test condition Symbol Value Unit
Thermal resistance junction to ambient air l = 4 mm, TL = constant RthJA 350 K/W
Junction temperature Tj 175 °C
Storage temperature range Tstg - 65 to + 150 °C
Document Number 81857 For technical questions within your region, please contact one of the following: www.vishay.com
Rev. 1.3, 29-Oct-10 DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com 1

2. 1N4148
Vishay Semiconductors
Electrical Characteristics
Tamb = 25 °C, unless otherwise specified
Parameter Test condition Symbol Min. Typ. Max. Unit
Forward voltage IF = 10 mA VF 1000 mV
VR = 20 V IR 25 nA
Reverse current VR = 20 V, Tj = 150 °C IR 50 µA
VR = 75 V IR 5 µA
IR = 100 µA, tp/T = 0.01,
Breakdown voltage V(BR) 100 V
tp = 0.3 ms
Diode capacitance VR = 0, f = 1 MHz, VHF = 50 mV CD 4 pF
Rectification efficiency VHF = 2 V, f = 100 MHz r 45 %
IF = IR = 10 mA, iR = 1 mA trr 8 ns
Reverse recovery time IF = 10 mA, VR = 6 V,
trr 4 ns
iR = 0.1 x IR, RL = 100 
Typical Characteristics
Tamb = 25 °C, unless otherwise specified
1.2 1000
1.0 I F = 100 mA
IR- Reverse Current (nA)
VF - Forward Voltage (V)
Tj = 25 °C
0.8 100
10 mA
0.6
1 mA Scattering Limit
0.4 10
0.1 mA
0.2
0 1
- 30 0 30 60 90 120 1 10 100
94 9169 Tj - Junction Temperature (°C) 94 9098 VR- Reverse Voltage (V)
Figure 1. Forward Voltage vs. Junction Temperature Figure 3. Reverse Current vs. Reverse Voltage
1000
1N4148
IF - Forward Current (mA)
100
Scattering Limit
10
1
TJ = 25 °C
0.1
0 0.4 0.8 1.2 1.6 2.0
94 9170 VF - Forward Voltage (V)
Figure 2. Forward Current vs. Forward Voltage
www.vishay.com For technical questions within your region, please contact one of the following: Document Number 81857
2 DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com Rev. 1.3, 29-Oct-10

3. 1N4148
Vishay Semiconductors
Package Dimensions in millimeters (inches): DO-35_02
1.75 (0.069)
1.5 (0.059)
Cathode identification
0.55 (0.022) max.
25.4 (1.000) min. 3.4 (0.134) max. 25.4 (1.000) min.
Document no.: 6.560-5004.12-4
Created - Date: 17. March 2008
21145
Document Number 81857 For technical questions within your region, please contact one of the following: www.vishay.com
Rev. 1.3, 29-Oct-10 DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com 3

4. Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
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(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
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Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1