1N957B Series
500 mW DO-35 Hermetically
Sealed Glass Zener Voltage
Regulators
This is a complete series of 500 mW Zener diodes with limits and
excellent operating characteristics that reflect the superior capabilities
of silicon–oxide passivated junctions. All this in an axial–lead
hermetically sealed glass package that offers protection in all common
environmental conditions.
http://onsemi.com
Cathode
Anode
Specification Features:
• Zener Voltage Range – 6.8 V to 75 V
• ESD Rating of Class 3 (>16 KV) per Human Body Model
• DO–204AH (DO–35) Package – Smaller than Conventional
DO–204AA Package
• Double Slug Type Construction
• Metallurgical Bonded Construction
AXIAL LEAD
CASE 299
GLASS
Mechanical Characteristics:
CASE: Double slug type, hermetically sealed glass
FINISH: All external surfaces are corrosion resistant and leads are
readily solderable
MAXIMUM LEAD TEMPERATURE FOR SOLDERING PURPOSES:
230°C, 1/16″ from the case for 10 seconds
POLARITY: Cathode indicated by polarity band
MOUNTING POSITION: Any
MARKING DIAGRAM
L
1N
9x
xB
YWW
L
= Assembly Location
1N9xxB = Device Code
= (See Table Next Page)
= Year
= Work Week
MAXIMUM RATINGS (Note 1.)
Y
WW
Rating
Symbol
Value
Unit
Max. Steady State Power Dissipation
P
D
500
mW
@ T ≤ 75°C, Lead Length = 3/8″
Derate above 75°C
L
ORDERING INFORMATION
4.0
mW/°C
°C
Device
Package
Axial Lead
Axial Lead
Axial Lead
Axial Lead
Axial Lead
Axial Lead
Axial Lead
Axial Lead
Shipping
Operating and Storage
Temperature Range
T , T
–65 to
+200
J
stg
1N9xxB
3000 Units/Box
5000/Tape & Reel
5000/Tape & Reel
3000/Ammo Pack
5000/Ammo Pack
5000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
1. Some part number series have lower JEDEC registered ratings.
1N9xxBRL
1N9xxBRL2 *
1N9xxBRA1
1N9xxBTA
1N9xxBTA2 *
{
1N9xxBRR1
1N9xxBRR2
}
* The “2” suffix refers to 26 mm tape spacing.
{
Polarity band up with cathode lead off first
Polarity band down with cathode lead off first
}
Semiconductor Components Industries, LLC, 2001
1
Publication Order Number:
May, 2001 – Rev. 1
1N957B/D