1SMAF4728A THRU 1SMAF4777A
Zener Voltage - 3.3 to 330 Volts
Peak Pulse Power - 1.0 W
SURFACE MOUNT ZENER DIODE
Features
SMAF
Small plastic package suitable for surface mounted design.
0.106(2.70)
0.094(2.40)
0.063 (1.60)
0.051 (1.30)
Mechanical Data
0.146(3.70)
0.130(3.30)
Case : JEDEC SMAF Molded plastic body
Terminals : Solder plated, solderable per MIL-STD-750,Method 2026
Polarity : Polarity symbol marking on body
Mounting Position : Any
Weight : 0.002ounce, 0.07grams
0.047(1.20)
0.035(0.90)
0.008(0.20)
0.005(0.12)
0.047(1.20)
0.031(0.80)
0.193(4.90)
0.173(4.40)
Maximum Ratings And Electrical Characteristics
Dimensions in inches and (millimeters)
Ratings at 25 C ambient temperature unless otherwise specified.
SYMBOLS
VALUE
UNITS
Power Dissipation at T L =75 C,
PD
1.0
W
Forward Voltage at I F =200mA
VF
1.2
V
Junction Temperature Range
TJ
-55 to + 150
O
C
-55 to + 150
O
C
MDD Catalog Number
O
Storage Temperature Range
TS
Fig.1 Maximum Continuous Power Derating
1.2
Power Dissipation ( W )
1.0
0.8
0.6
0.4
0.2
P.C.B. mounted on
0.2 X 0.2" (5 X 5 mm) copper areas pads.
0.0
25
50
75
100
125
150
175
T L ,Lead Temperature (°C)
The cruve graph is for reference only
DN:T20518A0
http://www.microdiode.com
Rev:2020A0
Page :1
1SMAF4728A THRU 1SMAF4777A
Zener Voltage - 3.3 to 330 Volts
Peak Pulse Power - 1.0 W
Ratings And Characteristic Curves
Characteristics at Ta = 25°C
Zener Voltage Range
Type
Marking
Min(V)
Nom(V)
1SMAF4728A
728A
3.10
3.3
1SMAF4729A
729A
3.40
1SMAF4730A
730A
1SMAF4731A
Dynamic
Impedance
(1)
V ZT(at I ZT)
Reverse Current
Admissible
Zener Current
I ZT
Z ZT(at I ZT)
IR
at V R
Max(V)
(mA)
Max (Ω)
Max(μA)
(V)
I ZM (mA)
3.50
75
10
100
1
285
3.6
3.80
69
10
100
1
263
3.70
3.9
4.10
64
9.0
50
1
243
731A
4.06
4.3
4.56
58
9.0
25
1
219
1SMAF4732A
732A
4.50
4.7
4.93
53
8.0
10
1
203
1SMAF4733A
733A
4.84
5.1
5.36
49
7.0
10
1
186
1SMAF4734A
734A
5.32
5.6
5.92
45
5.0
10
2
170
1SMAF4735A
735A
5.86
6.2
6.51
41
2.0
10
3
154
1SMAF4736A
736A
6.46
6.8
7.18
37
3.5
10
4
140
1SMAF4737A
737A
7.12
7.5
7.88
34
4.0
10
5
127
1SMAF4738A
738A
7.79
8.2
8.67
31
4.5
10
6
116
1SMAF4739A
739A
8.60
9.1
9.59
28
5.0
10
7
104
95
1SMAF4740A
740A
9.50
10
10.5
25
7.0
10
7
1SMAF4741A
741A
10.4
11
11.6
23
8.0
5
8
86
1SMAF4742A
742A
11.4
12
12.6
21
9.0
5
9
79
1SMAF4743A
743A
12.4
13
14.1
19
10
5
10
71
1SMAF4744A
744A
13.8
15
15.8
17
14
5
11
63
58
1SMAF4745A
745A
15.2
16
17.1
16
16
5
12
1SMAF4746A
746A
16.8
18
19.2
14
20
5
13
52
1SMAF4747A
747A
19.0
20
21.2
13
22
5
15
47
1SMAF4748A
748A
20.8
22
23.3
12
23
5
17
43
1SMAF4749A
749A
22.8
24
26.0
11
25
5
18
38
35
1SMAF4750A
750A
25.3
27
28.9
9.5
35
5
21
1SMAF4751A
751A
28.2
30
32.0
8.5
40
5
23
31
1SMAF4752A
752A
31.3
33
34.9
7.5
45
5
25
28
1SMAF4753A
753A
34.2
36
37.9
7.0
50
5
27
26
1SMAF4754A
754A
37.2
39
41.5
6.5
60
5
30
24
1SMAF4755A
755A
40.9
43
45.6
6.0
70
1
32
22
1SMAF4756A
756A
44.9
47
49.8
5.5
80
1
35
20
18
1SMAF4757A
757A
48.6
51
54.0
5.0
95
1
38
1SMAF4758A
758A
53.6
56
58.8
4.5
110
1
42
17
1SMAF4759A
759A
58.9
62
65.6
4.0
125
1
47
15
1SMAF4760A
760A
64.6
68
71.7
3.7
150
1
52
14
1SMAF4761A
761A
71.2
75
78.8
3.3
175
1
56
12
1SMAF4762A
762A
77.9
82
87.0
3.0
200
1
62
11
1SMAF4763A
763A
86.0
91
96.0
2.8
250
1
69
10
9.5
1SMAF4764A
764A
95.0
100
105
2.5
350
1
76
1SMAF4765A
765A
104
110
116
2.3
450
1
84
8.6
1SMAF4766A
766A
114
120
127
2.0
550
1
91
7.8
1SMAF4767A
767A
125
135
142
1.9
700
1
100
7.0
1SMAF4768A
768A
140
150
157
1.7
900
1
110
6.3
1SMAF4769A
769A
155
165
172
1.6
1100
1
120
5.8
1SMAF4770A
770A
170
180
191
1.4
1200
1
135
5.2
4.7
1SMAF4771A
771A
189
200
211
1.2
1400
1
150
1SMAF4772A
772A
209
220
231
1.0
1600
1
165
4.3
1SMAF4773A
773A
229
240
251
1.0
1800
1
180
3.9
1SMAF4774A
774A
249
260
271
1.0
2000
1
190
3.7
775A
269
280
291
1.0
2100
1
205
3.4
776A
289
300
315
1.0
2300
1
230
3.1
777A
313
330
346
1.0
2500
1
250
2.8
1SMAF4775A
1SMAF4776A
1SMAF4777A
(1) V ZT is tested with pulses (20 ms)
http://www.microdiode.com
Rev:2020A0
Page :2
1SMAF4728A THRU 1SMAF4777A
Zener Voltage - 3.3 to 330 Volts
Peak Pulse Power - 1.0 W
Packing information
P0
unit:mm
P1
d
E
Item
F
B
A
Symbol
Tolerance
A
B
C
d
D
D1
D2
E
F
P
P0
P1
T
W
W1
0.1
0.1
0.1
0.05
2.0
min
0.5
0.1
0.1
0.1
0.1
0.1
0.1
0.3
1.0
SMAF
W
Carrier width
Carrier length
Carrier depth
Sprocket hole
7" Reel outside diameter
7" Reel inner diameter
Feed hole diameter
Sprocket hole position
Punch hole position
Punch hole pitch
Sprocket hole pitch
Embossment center
Overall tape thickness
Tape width
Reel width
P
D2
T
D1
C
W1
D
2.80
4.75
1.42
1.50
178.00
54.40
13.00
1.75
5.05
4.00
4.00
2.00
0.30
8.00
12.30
Note:Devices are packed in accor dance with EIA standar RS-481-A and specifications listed above.
Reel packing
PACKAGE
SMAF
REEL SIZE
7"
REEL
(pcs)
COMPONENT
SPACING
(m/m)
BOX
(pcs)
INNER
BOX
(m/m)
REEL
DIA,
(m/m)
CARTON
SIZE
(m/m)
CARTON
(pcs)
APPROX.
GROSS WEIGHT
(kg)
3,000
4.0
6,000
210*208*203
178
400*265*400
120,000
10.0
Suggested Pad Layout
Symbol
Unit (mm)
Unit (inch)
A
1.8
0.071
B
1.6
3.8
0.150
D
2.2
0.087
E
5.4
0.213
C
0.063
Important Notice and Disclaimer
Microdiode Electronics (Jiangsu) reserves the right to make changes to this document and its products and
specifications at any time without notice. Customers should obtain and confirm the latest product information and
specifications before final design,purchase or use.
Microdiode Electronics (Jiangsu) makes no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, not does Microdiode Electronics (Jiangsu) assume any liability for application
assistance or customer product design. Microdiode Electronics (Jiangsu) does not warrant or accept any liability with
products which are purchased or used for any unintended or unauthorized application.
No license is granted by implication or otherwise under any intellectual property rights of Microdiode
Electronics (Jiangsu).
Microdiode Electronics (Jiangsu) products are not authorized for use as critical components in life support
devices or systems without express written approval of Microdiode Electronics (Jiangsu).
http://www.microdiode.com
Rev:2020A0
Page :5
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