1N4148

Part: Microsemi 1N4148-1

Type: Glass Axial Switching Diode

Description: A JEDEC registered switching/signal diode featuring internal metallurgical bonded construction, very fast switching speeds, low capacitance, and hermetically sealed in a double-plug DO-35 package.

Operating Conditions:

• Supply voltage: Up to 75 V (Working Peak Reverse Voltage)
• Operating temperature: -65 to +175 °C
• Average Rectified Current: 200 mA @ TA = 75 °C

Absolute Maximum Ratings:

• Max supply voltage: 100 V (Breakdown Voltage)
• Max continuous current: 200 mA (Average Rectified Current @ TA = 75 °C)
• Max junction/storage temperature: +175 °C

Key Specs:

• Forward Voltage (VF1): 0.8 V @ IF = 10 mA
• Forward Voltage (VF2): 1.2 V @ IF = 100 mA
• Reverse Recovery Time (trr): 5 ns (IF = IR = 10 mA, RL = 100 Ohms)
• Reverse Current (IR1): 25 nA @ 20 V
• Reverse Current (IR2): 0.5 μA @ 75 V
• Capacitance (C): 4.0 pF @ VR = 0 V, f = 1 MHz
• Capacitance (C): 2.8 pF @ VR = 1.5 V, f = 1 MHz

Features:

• Popular JEDEC registered 1N4148 number.
• Hermetically sealed glass construction.
• Metallurgically bonded.
• Double plug construction.
• Very low capacitance.
• Very fast switching speeds with minimal reverse recovery times.
• JAN, JANTX, and JANTXV qualifications are available per MIL-PRF-19500/116.

Applications:

• High frequency data lines.
• RS-232 & RS-422 interface networks.
• Ethernet 10 base T.
• Low capacitance steering or blocking.
• LAN.
• Computers.

Package:

• DO-35 (DO-204AH)
• DO-213AA
• UB (surface mount)
• UB2 (2-Pin surface mount)
• UBC (Ceramic Lid surface mount)

• Popular JEDEC registered 1N4148 number.
• Hermetically sealed glass construction.
• Metallurgically bonded.
• Double plug construction.
• Very low capacitance.
• Very fast switching speeds with minimal reverse recovery times.
• JAN, JANTX, and JANTXV qualifications are available per MIL-PRF-19500/116.
• MSP screening is also available in reference to MIL-PRF-19500 (JANS). (See part nomenclature for all available options.)
• RoHS compliant version available (commercial grade only).

• High frequency data lines.
• Small size for high density mounting using flexible thru-hole leads (see package illustration).
• RS-232 & RS-422 interface networks.
• Ethernet 10 base T.
• Low capacitance steering or blocking.
• LAN.
• Computers.

1N4148 Pinout

Package: DO-35 (DO-204AH) — 2-pin axial glass diode package

Notes

• DO-35 package: Hermetically sealed glass axial package with flexible thru-hole leads.
• Polarity: Cathode is indicated by a band on the glass body.
• Lead length: Typically 0.375 inch (9.35 mm) per MIL-PRF-19500/116.
• This is a 2-terminal switching/signal diode with very low capacitance and fast switching speeds.
• The 1N4148-1 variant shown in the datasheet is the military-grade (JAN/JANTX/JANTXV qualified) version; commercial variants (1N4148UB, 1N4148UB2, 1N4148UBC) use different surface-mount packages but have identical electrical characteristics.

• FORWARD VOLTAGE V F1 @ I F =10mA FORWARD VOLTAGE V F2 @ I F =100mA REVERSE RECOVERY TIME t rr (Note 1) FORWARD RECOVERY TIME t fr (Note 2) REVERSE CURRENT I R1 @20 V REVERSE CURRENT I R2 @75 V REVERSE CURRENT I R3 @20 V T A =150 o C REVERSE CURRENT I R4 @75 V T A =150 o C CAPACI- TANCE C (Note 3) CAPACI- TANCE C (Note 4)
• V V ns ns nA μ A μ A μ A pF pF
• 0.8 1.2 5 20 25 0.5 35 75 4.0 2.8

NOTE 1:

IF = IR = 10 mA, RL = 100 Ohms.

IF = 50 mA.

NOTE 2:

NOTE 3:

VR = 0 V, f = 1 MHz, VSIG = 50 mV (pk to pk).

NOTE 4:

VR = 1.5V, f = 1 MHz, VSIG = 50 mV (pk to pk).

NOTES: 1. Lead length = .375 inch (9.35 mm). See Figure 2 for thermal impedance curves.

1. TA = +75°C on printed circuit board (PCB), PCB = FR4 - .0625 inch (1.59 mm) 1-layer 1-Oz Cu, horizontal, in still air; pads for axial = .092 inch (2.34 mm) diameter, strip = .030 inch (0.76 mm) x 1 inch (25.4 mm) long, lead length L ≤ 0.187 inch (≤ 4.75 mm); RӨJA with a defined PCB thermal resistance condition included, is measured at IO = 200 mA.

2. See Figure 1 for derating.

Qualified Levels: JAN, JANTX, and JANTXV

DO-35 (DO-204AH) Package