Datasheet

UNISONIC TECHNOLOGIES CO., LTD
1N4745A
DIODE
ZENER DIODE

DESCRIPTION
The UTC 1N4745A is a zener diode, it uses UTC’s advanced
technology to provide customers with low inductance and low reverse
leakage, etc.
The UTC 1N4745A is suitable for use in stabilizing and clipping
with high power rating.

FEATURES
DO-41
* Low reverse leakage
* Low inductance
* Glass passivated chip

SYMBOL

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
1N4745AL-Z41-R
1N4745AG-Z41-R
Note: Pin Assignment: A: Anode
K: Cathode
Package
DO-41
Pin Assignment
1
2
K
A
Packing
Tape Reel
1N4745AL-Z41-B

(1)Packing Type
(1) B: Tape Box, R: Tape Reel
(2)Package Type
(2) Z41: DO-41
(3)Green Package
(3) L: Lead Free, G: Halogen Free and Lead Free
MARKING
Cathode Band for uni-directional Only
1N4745A
L: Lead Free
G: Halogen Free
Date Code
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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QW-R601-211.B
1N4745A

DIODE
ABSOLUTE MAXIMUM RATINGS (TA=25°C unless otherwise noted)
PARAMETER
SYMBOL
RATINGS
UNIT
Forward Voltage at IF=200mA
VF
1.2
V
DC Power Dissipation at TL=50°C (Note 2)
PD
1
W
Junction Temperature
TJ
-55~+175
°C
Storage Temperature
TSTG
-55~+175
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. TL=Lead temperature at 3/8 " (9.5mm) from body.
3. Valid provided that leads are kept at ambient temperature at a distance of 10 mm from case.

THERMAL DATA
PARAMETER
Junction to Ambient Air (Note 3)

SYMBOL
θJA
RATINGS
170
UNIT
°C/W
ELECTRICAL CHARACTERISTICS(Cont.)
PART NUMBER
1N4745A
Nominal Zener
Voltage
VZ @ IZT
(V)
16
IZT
(mA)
15.5
Maximum Zener Impedance
ZZT @ IZT ZZK @ IZK
(Ω)
(Ω)
16
700
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
IZK
(mA)
0.25
Maximum Maximum
Maximum Reverse
DC Zener Surge
Leakage Current
Current Current
IR @ VR
IZM
IRM
(μA)
(V)
(mA)
(mApK)
0.1
12.2
57
285
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1N4745A
Temperature Coefficient, θVz (mV/℃)
TYPICAL CHARACTERISTICS
Maximum Power
Dissipation, PD (W)

DIODE
Typical Thermal Resistance vs. Lead Length
175
Maximum Surge Power
100
150
Rectangular Waveform
TJ=25 Prior to Initial Pulse
5% Duty
Cycle
125
16V Non-Repetitive
100
10
75
50
10% Duty
Cycle
20% Duty
Cycle
25
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Lead Length to Heatsink , L (inches)
1
0.01
0.1
1
10
100
Pulse Width, PW, (s)
1000
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R601-211.B
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