鈥?/div>
APPLICATIONS / BENEFITS
Regulates voltage over a broad operating
current and temperature range
Extensive selection from 6.8 to 200 V
Standard voltage tolerances are plus/minus 5%
with B suffix, 10 % with A suffix identification
Tight tolerances available in plus or minus 2%
or 1% with C or D suffix respectively
Flexible axial-lead mounting terminals
Nonsensitive to ESD per MIL-STD-750 Method
1020
Minimal capacitance (see Figure 3)
Inherently radiation hard as described in
Microsemi MicroNote 050
MAXIMUM RATINGS
鈥?/div>
Operating and Storage temperature: -65
潞
C to
+175
潞
C
鈥?/div>
Thermal Resistance: 250
潞
C/W junction to lead at 3/8
(10 mm) lead length from body, or 310
潞
C/W junction
to ambient when mounted on FR4 PC board (1 oz
Cu) with 4 mm
2
copper pads and track width 1 mm,
length 25 mm
鈥?/div>
Steady-State Power: 0.5 watts at T
L
< 50
o
C 3/8 inch
(10 mm) from body or 0.48 W at T
A
< 25
潞
C when
mounted on FR4 PC board as described for thermal
resistance above (also see Figure1)
鈥?/div>
Forward voltage @200 mA: 1.1 volts (maximum) for
1N957B 鈥?1N985B and 1.3 V for 1N985 鈥?1N992B
鈥?/div>
Solder Temperatures: 260
潞
C for 10 s (max)
MECHANICAL AND PACKAGING
鈥?/div>
鈥?/div>
鈥?/div>
CASE: Hermetically sealed axial-lead glass
DO-35 (DO-204AH) package
TERMINALS: Leads, tin-lead plated solderable
per MIL-STD-750, method 2026
POLARITY: Cathode indicated by band. Diode
to be operated with the banded end positive
with respect to the opposite end for Zener
regulation
MARKING: Part number
TAPE & REEL option: Standard per EIA-296
(add 鈥淭R鈥?suffix to part number)
WEIGHT: 0.2 grams
See package dimensions on last page
1N957B 鈥?992B
(DO-35)
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Copyright
铮?/div>
2003
10-31-2003 REV B
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
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