RECTRON
SEMICONDUCTOR
TECHNICAL SPECIFICATION
FM4735W
THRU
FM4763W
SURFACE MOUNT
GLASS PASSIVATED ZENER SILICON RECTIFIER
VOLTAGE RANGE - 6.2 TO 91.0 Volts Steady State Power- 1.0 Watt
FEATURES
*
*
*
*
Plastic package has underwriters laboratory
Excellent clamping capability
Low zener impedance
Low regulation factor
MECHANICAL DATA
* Epoxy : Device has UL flammability classification 94V-0
0.067 (1.70)
0.051 (1.29)
0.180(4.57)
0.160(4.06)
SMA
0.110 (2.79)
0.086 (2.18)
Ratings at 25
o
C ambient temperature unless otherwise specified.
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25 C ambient temperature unless otherwise specified.
o
0.091 (2.31)
0.067 (1.70)
0.059 (1.50)
0.035 (0.89)
0.209 (5.31)
0.185 (4.70)
0.012 (0.305)
0.006 (0.152)
0.008 (0.203)
0.004 (0.102)
Dimensions in inches and (millimeters)
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICE
MAXIMUM RATINGS
(At T
A
= 25 C unless otherwise noted)
o
TYPE
NOMINAL
ZENER
V O LTA G E
at I
ZT
V
Z
(NOTE 1)
TEST
CURRENT
I
ZT
(mA)
41.0
37.0
34.0
31.0
MAXIMUM DYNAMIC
IMPEDANCE
Z
ZT
at
I
ZT
(Ohms)
2.0
3.5
4.0
4.5
Z
ZK
at
(Ohms)
700
700
700
700
(NOTE
1)
I
ZK
MAXIMUM DC REVERSE
LEAKAGE CURRENT
I
R
(uA)
50.0
10.0
10.0
10.0
V
R
(Volts)
3.0
4.0
5.0
6.0
MAXIMUM
SURGE
CURRENT
(NOTE 2)
I
RM
(Volts)
FM4735W
FM4736W
FM4737W
FM4738W
6.2
6.8
7.5
8.2
(mA)
1.0
1.0
0.5
0.5
(mApk)
730.0
660.0
605.0
550.0
MAXIMUM
F O RWA R D
V O LTA G E
at 200mA
V
F
(Volts)
1.2
1.2
1.2
1.2
2004-8
TYPE
NOMINAL
ZENER
V O LTA G E
at I
ZT
V
Z
(NOTE 1)
MAXIMUM DYNAMIC
TEST
CURRENT
I
ZT
(mA)
IMPEDANCE
MAXIMUM DC REVERSE
LEAKAGE CURRENT
MAXIMUM
SURGE
CURRENT
(NOTE 2)
I
RM
(Volts)
FM4739W
FM4740W
FM4741W
FM4742W
FM4743W
FM4744W
FM4745W
FM4746W
FM4747W
FM4748W
FM4749W
FM4750W
FM4751W
FM4752W
FM4753W
FM4754W
FM4755W
FM4756W
FM4757W
FM4758W
FM4759W
FM4760W
FM4761W
FM4762W
FM4763W
9.1
10
11
12
13
15
16
18
20
22
24
27
30
33
36
39
43
47
51
56
62
68
75
82
91
Z
ZT
at
I
ZT
(Ohms)
5.0
7.0
8.0
9.0
10.0
14.0
16.0
20.0
22.0
23.0
25.0
35.0
40.0
45.0
50.0
60.0
70.0
80.0
95.0
110.0
125.0
150.0
175.0
200.0
250.0
Z
ZK
at
(Ohms)
700
700
700
700
700
700
700
750
750
750
750
750
1000
1000
1000
1000
1500
1500
1500
2000
2000
2000
2000
3000
3000
(NOTE 1)
I
ZK
(mA)
0.5
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
I
R
(uA)
10.0
10.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
V
R
(Volts)
7.0
7.6
8.4
9.1
9.9
11.4
12.2
13.7
15.2
16.7
18.2
20.6
22.8
25.1
27.4
29.7
32.7
35.8
38.8
42.6
47.1
51.7
56.0
62.2
69.2
(mApk)
MAXIMUM
F O RWA R D
V O LTA G E
at 200mA
V
F
(Volts)
28.0
25.0
23.0
21.0
19.0
17.0
15.5
14.0
12.5
11.5
10.5
9.5
8.5
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.7
3.3
3.0
2.0
500.0
454.0
414.0
380.0
344.0
305.0
285.0
250.0
225.0
205.0
190.0
170.0
150.0
135.0
125.0
115.0
110.0
95.0
90.0
80.0
70.0
65.0
60.0
55.0
50.0
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
2004-8
NOTES : 1. Standard voltage tolerance is 20%, Suffix “A” : + 10%
2. Surge current is a non-repetitive, 8.3ms pulse width square wave or equivalent sine-wave superimposed on
IZT
per JEDEC Method
3. Maximum steady state power dissipation is 1.0 watt at T
T
=75
o
C
RATING AND CHARACTERISTIC CURVES ( FM4735W THRU FM4763W )
FIG. 1 - MAXIMUM CONTINUOUS
POWER DISSIPATION
FIG. 2 - TYPICAL ZENER IMPEDANCE
P
M
(AV), AVERAGE POWER
DISSIPATION, WATTS
1.0
0.75
0.5
Zz, DYNAMIC ZENER IMPEDANCE,
OHMS
60 Hz
RESISTIVE OR
INDUCTIVE LOAD
1,000
100
10
0.25
P.C.B.MOUNTED ON
0.31 X 0.31 X 0.08" (8 X 8 X 2mm)
COPPER AREAS PADS
0
25
50
75
100 125
150
TERMINALS TEMPERATURE,
175
1
0.5
10
100
I
ZT
, ZENER TEST CURRENT, mA
500
FIG. 3 - TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS FOR FM4763W
10
FIG. 4 - TYPICAL REVERSE CHARACTERISTICS
10
INSTANTANEOUS FORWARD CURRENT,
AMPERES
INSTANTANEOUS REVERSE CURRENT,
MICROAMMPERES
1
PULSE WIDTH=300uS
1% DUTY CYCLE
1
T
J
= 100
T
J
= 25
0.1
0.1
T
J
= 25
0.01
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0.01
0
20
40
60
80
100
INSTANTANEOUS FORWARD VOLTAGE,
VOLTS
PERCENT OF RATED ZENER VOLTAGE, %
Vz, TEMPERATURE COEFFICIENT,
mV/
FIG. 5 - TYPICAL TEMPERATURE COEFFICIENTS
110
90
TESTED at RATED IZT
70
50
30
10
0
0
10 20 30 40 50 60 70 80 90 100
Vz, ZENER VOLTAGE, VOLTS
RECTRON
ADI Reference Circuit
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