SMA4949A Datasheet, PDF (1/2 Pages) PACELEADER INDUSTRIAL – SURFACE MOUNT ZENER TYPE

SMA4949A
SURFACE MOUNT ZENER TYPE
VOLTAGE 24V 2.0 Watts Surface Mount Zener Diode
SMA/DO-214AC
.055(1.40)
.062(1.60)
.098(2.50)
.114(2.90)
.078(2.00)
.096(2.44)
.157(4.00)
.181(4.60)
.006(.152)
.012(.305)
.030(0.76)
.060(1.52)
.004(.102)
.008(.203)
.188(4.80)
.208(5.28)
Dimensions in inches and (millimeters)
FEATURES
For surface mounted applications
2.0 W power dissipation
Ideally suited for automated assembly processes
MECHANICAL DATA
Case: Molded plastic
Epoxy: UL 94V-0 rate flame retardant
Terminals:Solderable per MIL-STD-750 method 2026
Polarity: Cathode band
Mounting position: Any
MAXIMUM RATINGS (at TA=25^oC unless otherwise noted)
Rating 25℃ ambient temperature unless otherwise specified.
Single phase half wave, 60Hz, resistive or inductive load.
For capacitive load, derate current by 20％.
CHARACTERISTICS
Zener Current(see page1)
Forward Voltage @ IF=200mA
Max. Steady State Power Dissipation @
TL=100℃,Lead Length=1mm
SYMBOLS
IZM
VF
Pd
VALUE
Pd / Vz
1.2
2
Typical Thermal Resistnace(Note1)
Operating Temperature Range
Storage Temperature Range
RthjL
Rthja
TJ
TSTG
20
80
-55 to +150
-55 to +150
NOTES:
1. Thermal Resistance Junction to Lead/Ambient.
2. The type number listed have a standard tolerance on the nominal zener voltage of ± 5%
UNIT
mA
Volts
W
℃/W
℃
℃
Nominal Zener Voltage
ZENER 2W
SERIES VZ@IZT
IZT
(V)
(mA)
SMA4949
24
20.8
Maximum Zener
ZZT@IZ
(Ω)
13
ZZK@IZ
(Ω)
750
IZK
(mA)
0.25
Maximum Reverse
Leakage Current
IR@VR
(uA)
(V)
0.5
18.2
Maximum DC
Zener Current
IZM
(mA)
76
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