1N746A-1 – 1N759A-1,
1N4370A-1 – 1N4372A-1
Silicon 500 mW Zener Diodes
Qualified per MIL-PRF-19500/127
This popular series of 500 mW Zener voltage regulators provides a selection from 2.4 to 12
volts in a standard 5% tolerance as well as available tighter 2% and 1% tolerances. These
axial-leaded, glass DO-35 Zeners feature an internal metallurgical bond and are military
qualified to the JAN, JANTX, and JANTXV level. A RoHS compliant commercial grade only
version is also available.
JAN, JANTX, and
Important: For the latest information, visit our website http://www.microsemi.com.
• JEDEC registered 1N746 through 1N759A and 1N4370 through 1N4372A series.
• Standard voltage tolerance is ± 5% with optional tighter tolerances of ± 2% or 1%.
• Internal metallurgical bond.
• JAN, JANTX, and JANTXV qualifications are available per MIL-PRF-19500/127.
(See part nomenclature for all available options.)
• RoHS compliant versions available (commercial grade only).
APPLICATIONS / BENEFITS
• Regulates voltage over a broad range of temperature and current.
• Regulated voltage range from 2.4 to 12 V.
• Flexible axial-lead mounting terminals.
• Non-sensitive to ESD per MIL-STD-750 method 1020.
• Minimal capacitance.
• Inherently radiation hard as described in Microsemi MicroNote 050.
Also available in:
(MELF surface mount)
Operating and Storage Temperature
Thermal Resistance Junction-to-Lead
@ .375 inch (9.53 mm) lead length from body
Thermal Resistance Junction-to-Ambient when
mounted on PCB (1)
Average Rated Power Dissipation
@ TL = +50°C .375 inch (9.53 mm) from body (2)
@ TA = 55°C mounted on PCB
Forward Voltage @ IF = 200 mA
Solder Temperature @ 10 s
TJ and TSTG
-65 to +175
1. See Figures 1 and 2 for derating curves. TA = +75 °C on an FR4 PC board with 1 oz copper
2. The 0.5 W linearly derates starting at TL = 50 °C and goes to zero at 175 °C. For ambient TA
condition on a typical PC board, it linearly derates from 400 mW starting at 55 °C and goes to zero at
175 °C (see Figure 2).
MSC – Lawrence
6 Lake Street,
Lawrence, MA 01841
Tel: 1-800-446-1158 or
Fax: (978) 689-0803
MSC – Ireland
Gort Road Business Park,
Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044
Fax: +353 (0) 65 6822298
T4-LDS-0288, Rev. 1 (5/23/13)
©2013 Microsemi Corporation
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