1N957B-1 1N992B-1
Qualified Levels*:
JAN, JANTX, and
Silicon 500 mW Zener Diodes
Available on
JANTXV
commercial
Qualified per MIL-PRF-19500/117
versions
DESCRIPTION
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 feature an internal metallurgical bond and are available in
military qualified and commercial RoHS compliant versions. Military qualified versions are
available on the 1N962B-1 through 1N992B-1 range of part numbers.
Important: For the latest information, visit our website 1N957B-1 1N992B-1
MECHANICAL and PACKAGING
CASE: Hermetically sealed axial-lead glass DO-35 (DO-204 AH) package.
TERMINALS: Tin-lead (Sn/Pb) or RoHS compliant annealed matte-tin plating (on commercial grade only). Solderable per MIL-
STD-750, method 2026.
MARKING: Part number.
POLARITY: Cathode indicated by band. Diode to be operated with the banded end positive with respect to the opposite end for
Zener regulation.
TAPE & REEL option: Standard per EIA-296 (add TR suffix to part number). Consult factory for quantities.
WEIGHT: 0.2 grams
See Package Dimensions on last page.
PART NOMENCLATURE
1N957B-1 1N961B-1 only:
1N957 B -1 (e3)
JEDEC type number RoHS Compliance
(see Electrical Characteristics e3 = RoHS compliant
table) Blank = non-RoHS compliant
Zener Voltage Tolerance
Metallurgically Bonded
B = 5%
C = 2%
D = 1%
1N962B-1 1N992B-1 only:
JAN 1N962 B -1 (e3)
Reliability Level RoHS Compliance
JAN = JAN level e3 = RoHS compliant (available
JANTX = JANTX level on commercial grade only)
JANTXV = JANTXV level Blank = non-RoHS compliant
Blank = Commercial
Metallurgically Bonded
JEDEC type number
(see Electrical Characteristics
table)
Zener Voltage Tolerance
B = 5%
C = 2%
D = 1%
T4-LDS-0287, Rev. 1 (121795) 2012 Microsemi Corporation Page 2 of 8