山东晶导微电子有限公司
Jingdao Microelectronics
Silicon Planar Zener Diodes
1SMAF4728A THRU 1SMAF4777A
PINNING
FEATURES
• Total power dissipation: Max. 1 W.
• Wide zener reverse voltage range 3.3V to 330V.
• Small plastic package suitable for surface mounted design.
PIN
1
2
DESCRIPTION
Cathode
Anode
MECHANICAL DATA
• Case: SMAF
• Terminals: Solderable per MIL-STD-750, Method 2026
• A pprox. Weight: 27mg 0.00095oz
1
2
Simplified outline SMAF and symbol
Absolute Maximum Ratings And Characteristics
（
Ta = 25
°C）
Parameter
Power Dissipation at T
c
=75
°C
Forward Voltage at I
F
= 200 mA
Junction Temperature Range
Storage Temperature Range
Symbol
P
D
V
F
T
J
T
S
Value
1
1.2
- 55 to + 150
- 55 to + 150
Unit
W
V
°C
°C
Fig.1 Maximum Continuous Power Derating
1.2
1.0
Power Dissipation (
W
)
0.8
0.6
0.4
0.2
0.0
25
50
75
100
125
150
175
T
c
,Case Temperature (
°C)
2016.10
SMAF-W-1SMAF4777A-1W
Page 1 of 3
山东晶导微电子有限公司
Jingdao Microelectronics
1SMAF4728A THRU 1SMAF4777A
PACKAGE OUTLINE
Plastic surface mounted package; 2 leads
SMAF
∠ALL
ROUND
∠ALL
ROUND
C
H
E
A
V M
A
E
D
A
g
g
pad
Top View
Bottom View
UNIT
mm
max
min
mil
max
min
A
1.2
0.9
47
35
C
0.20
0.12
7.9
4.7
D
3.7
3.3
146
130
E
2.7
2.4
106
94
e
1.6
1.3
63
51
g
1.2
0.8
47
31
pad
E
e
H
E
∠
4.9
4.4
7°
193
173
The recommended mounting pad size
1.6
(63)
2.2
(86)
1.6
(63)
mm
Unit
：
(mil)
2016.10
www.sdjingdao.com
1.8
(71)
Page 3 of 3
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