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  Microsemi Electronic Components Datasheet  

1N959BUR-1 Datasheet

Silicon MELF 500mW Zener Diodes

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1N957BUR-1 – 1N992BUR-1
Available on
commercial
versions
Silicon MELF 500 mW Zener Diodes
Qualified per MIL-PRF-19500/117
DESCRIPTION
The popular 1N957BUR-1 through 1N992BUR-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 glass MELF DO-213AA Zeners feature an internal metallurgical bond and are available
in military qualified and commercial RoHS compliant versions. Military qualified versions are
available on the 1N962BUR-1 through 1N992BUR-1 range of part numbers.
Qualified Levels*:
JAN, JANTX, and
JANTXV
Important: For the latest information, visit our website http://www.microsemi.com.
FEATURES
JEDEC registered 1N957B to 1N992B number series.
Internal metallurgical bond.
*JAN, JANTX, and JANTXV qualifications are available per MIL-PRF-19500/117 for part numbers
1N962BUR-1 through 1N992BUR-1.
Upscreening is available in reference to MIL-PRF-19500 for the range of 1N957BUR-1 through
1N961BUR-1. (See part nomenclature for all available options.)
RoHS compliant versions available (commercial grade only).
APPLICATIONS / BENEFITS
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%.
Small size for high density mounting using the surface mount method (see package illustration).
Non-sensitive to ESD per MIL-STD-750 method 1020.
Minimal capacitance.
Inherently radiation hard as described in Microsemi MicroNote 050.
MAXIMUM RATINGS
Parameters/Test Conditions
Symbol
Value
Unit
Operating and Storage Temperature
Thermal Resistance Junction-to-End Cap
Thermal Resistance Junction-to-Ambient when
mounted on PCB (1)
TJ and TSTG
R ӨJEC
R ӨJA
-65 to +175
100
300
ºC
ºC/W
ºC/W
Steady-State Power Dissipation
@ TEC = +125°C (2)
@ TA = 55°C mounted on PCB
Forward Voltage @ IF = 200 mA
1N957UR – 1N985UR
1N986UR – 1N992UR
Solder Temperature @ 10 s
PD 0.5 W
0.4
VF 1.1 V
1.3
TSP 260 oC
NOTES: 1. See figure 1 for derating curves. TA = +75°C on an FR4 PC board with 1 oz copper metalization.
2. Derate to 0 at +175°C.
DO-213AA MELF
Package
Also available in:
DO-35 (DO-204AH)
package
(axial-leaded)
1N957B-1 –
1N992B-1
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
T4-LDS-0287-1, Rev. 1 (121795)
©2012 Microsemi Corporation
Page 1 of 6


  Microsemi Electronic Components Datasheet  

1N959BUR-1 Datasheet

Silicon MELF 500mW Zener Diodes

No Preview Available !

1N957BUR-1 – 1N992BUR-1
MECHANICAL and PACKAGING
CASE: Hermetically sealed glass case package.
TERMINALS: Tin/lead plated or RoHS compliant matte-tin (on commercial grade only) over copper clad steel. Solderable per
MIL-STD-750, method 2026.
POLARITY: Cathode end is banded.
MOUNTING: The axial coefficient of expansion (COE) of this device is approximately +6PPM/°C. The COE of the mounting
surface system should be selected to provide a suitable match with this device.
MARKING: Part number.
TAPE & REEL option: Standard per EIA-296. Consult factory for quantities.
WEIGHT: 0.04 grams.
See Package Dimensions on last page.
PART NOMENCLATURE
1N957BUR-1 – 1N961BUR-1 only:
JEDEC type number
(see Electrical Characteristics
table)
Zener Voltage Tolerance
B = 5%
C = 2%
D = 1%
1N957 B UR -1 (e3)
RoHS Compliance
e3 = RoHS compliant
Blank = non-RoHS compliant
Metallurgically Bonded
Surface Mount Package type
1N962BUR-1 – 1N992BUR-1 only:
JAN 1N962 B UR -1 (e3)
Reliability Level
JAN = JAN level
JANTX = JANTX level
JANTXV = JANTXV level
Blank = Commercial
JEDEC type number
(see Electrical Characteristics
table)
Zener Voltage Tolerance
B = 5%
C = 2%
D = 1%
RoHS Compliance
e3 = RoHS compliant (available
on commercial grade only)
Blank = non-RoHS compliant
Metallurgically Bonded
Surface Mount Package type
T4-LDS-0287-1, Rev. 1 (121795)
©2012 Microsemi Corporation
Page 2 of 6


Part Number 1N959BUR-1
Description Silicon MELF 500mW Zener Diodes
Maker Microsemi
Total Page 6 Pages
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