SMAF4728A Datasheet, PDF (1/2 Pages) Dc Components – RECTIFIER SPECIALISTS

DC COMPONENTS CO., LTD. ^SMAF4728A
THRU
R
RECTIFIER SPECIALISTS
SMAF4777A
TECHNICAL SPECIFICATIONS OF SURFACE MOUNT ZENER DIODES
VOLTAGE RANGE - 3.3 to 330 Volts
POWER - 1.0 Watt
FEATURES
* Voltage Range:3.3V to 330V
* Low zener impedance
* Low regulation factor
* High reliability
* Glass passivated junction
SMAFL
MECHANICAL DATA
* Case: Molded plastic
* Epoxy: UL 94V-0 rate flame retardant
* Terminals:Solder plated, solderable per
MIL-STD-750, Method 2026
* Polarity: As marked
* Mounting position: Any
* Weight: 0.064 gram
.007(0.2)
.003(0.1)
.106(2.7)
.094(2.4)
.192(4.9)
.173(4.4)
.145(3.7)
.129(3.3)
.043(1.1)
.035(0.9)
.062(1.6)
.051(1.3)
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25 ^oC ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
Maximum Power Dissipation @TL=75^oC (Note 1)
Maximum forward voltage at IF=200mA
Maximum Thermal Resistance Junction to Ambient Air
Junction Temperature Range
Storage Temperature Range
NOTE: Suffix "A" indicates Zener Voltage Tolerance ± 5%
Fig. 1
POWER TEMPERATURE
DERATING CURVE
1.2
1
0.8
0.6
0.4
0.2
SYMBOL
Ptot
VF
RθJA
TJ
TSTG
REV-1,FEBRUARY,2015
0
50
100 150
AMBIENT TEMPERATURE, Ta(oC)
1
.047(1.2)
.031(0.8)
Dimensions in inches and (millimeters)
VALUE
1.0
1.2
170
-55 to +150
-55 to +150
UNITS
W
Volts
o_C/W
o_C
o_C
Fig. 2
TYPICAL THERMAL RESISTANCE
VERSUS LEAD LENGTH
175
150
125
100
75
50
25
0 0.2 0.4 0.6 0.8 1.0 1.2
Lead Length to Heatsink , L, (inches)
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