T4-LDS-0287, Rev. 1 (121795) ©2012 Microsemi Corporation Page 1 of 8
Availa ble on
commercial
versions
Silicon 500 mW Zener Diodes
Qualified per MIL-PRF-19500/117
JAN, JANTX, and
JANTXV
The popular 1N957B-1 through 1N992B-1 series of 0.5 watt Zener voltage regulators provides
a selection from 6.8 to 200 volts in a standard 5%, 2% and 1% tolerance versions. These
axial-leaded glass DO-35 Zeners feat ure an internal metal lurg ic al bond and are available in
military qualified and commercial RoHS compliant versions. Milit ary qualified ver si ons are
available on the 1N962B-1 through 1N992B-1 range of part numbers.
DO-35 (DO-204AH)
Package
Also available in:
DO-213AA package
(MELF surface mount)
1N957BUR-1 –
1N992BUR-1
Important: For the latest information, visit our website http://www.microsemi.com.
• JEDEC registered 1N957B to 1N 992B number series.
• Interna l meta llurg ic al bond.
• *JAN, JANTX, and JANTXV qualifications are available per MIL-PRF-19500/117 for part numbers
1N962B-1 thru 1N992B-1.
• Upscreening is available in reference to MIL-PRF-19500 for the range of 1N957B-1 through
1N961B-1.
(See part nomenclature for all available options.)
• RoHS compliant versions available ( co mme rci al grade only ).
• Regulates voltage over a broad operating current and temperature range.
• Extensive selection from 6.8 to 200 V.
• Standard voltage tolerance is ± 5% with optional tighter tolerances of ± 2% or 1%.
• Flexible axial-lea d mount ing te rmina ls.
• Non-sensitive to ESD per MIL-STD-750 method 1020.
• Minimal capacitance.
• Inherently radiation hard as described in M icros emi MicroNote 050.
MSC – Lawrence
6 Lake Street,
Lawrence, MA 01841
Tel: 1-800-446-1158 or
(978) 620-2600
Fax: (978) 689-0803
MSC – Ireland
Gort Road Business Park,
Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044
Fax: +353 (0) 65 6822298
Website:
www.microsemi.com
Parameters/Test Conditions
Operating and Storage Temperature
Thermal Resi stan ce Jun cti on-to-Lead
@ .375 inch (9.53 m m) lead length fr om body
ӨJL
Thermal Resi stan ce Jun cti on-to-Ambient when
mounted on PCB
(1)
ӨJA
Steady-State Power Dissipation
@ TL = +50°C .375 inch (9.53 mm) from body (2)
@ TA = 55°C mounted on PCB
PD
0.5
W
F
1N957 – 1N985
VF
1.1
V
Solder Temperature @ 10 s
NOTES: 1. See figures 1 and 2 for derating curves. TA = +75°C on an FR4 PC board with 1 oz copper
metalization.
2. Both ends of case or diode body to heat sink at L = .375 inch (9.53 mm). Derate IZ to 0.0 mA at
+175°C.