R E C T R O N
S E M I C O N D U C T O R
TECHNICAL SPECIFICATION
FEATURES
* Plastic package has underwriters laboratory
* Excellent clamping capability
* Low zener impedance
* Low regulation factor
* Epoxy : Device has UL flammability classification 94V-0
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
o
C ambient temperature unless otherwise specified.
FM4735W
THRU
FM4763W
SMX
VOLTAGE RANGE - 6.2 TO 91.0 Volts Steady State Power- 1.0 Watt
SURFACE MOUNT ZENER SILICON RECTIFIER
Dimensions in inches and (millimeters)
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICE
Ratings at 25
o
C ambient temperature unless otherwise specified.
2001-6
T Y P E
N O M I N A L
Z E N E R
V O LTA G E
at I
ZT
V
Z
(NOTE 1)
(Volts)
T E S T
C U R R E N T
I
Z T
( m A )
M A X I M U M D Y N A M I C
I M P E D A N C E
Z
ZT
at
I
Z T
(Ohms)
Z
ZK
at
(Ohms)
(
NOTE 1)
I
Z K
( m A )
MAXIMUM DC REVERSE
L E A K A G E C U R R E N T
I
R
( u A )
V
R
(Volts)
M A X I M U M
SURGE
C U R R E N T
(NOTE 2)
I
R M
( m A p k )
M A X I M U M
F O RWA R D
V O LTA G E
at 200mA
V
F
(Volts)
FM4738W
FM4737W
FM4736W
FM4735W
6.2
6.8
7.5
8.2
41.0
37.0
34.0
31.0
4.5
4.0
3.5
2.0
700
700
700
700
1.0
1.0
0.5
0.5
50.0
10.0
10.0
10.0
3.0
4.0
5.0
6.0
730.0
660.0
605.0
550.0
1.2
1.2
1.2
MAXIMUM RATINGS (At T
A
= 25
o
C unless otherwise noted)
1.2
MECHANICAL DATA
.209 (5.31)
.185 (4.70)
.091 (2.31)
.067 (1.70)
.110 (2.79)
.086 (2.18)
.011 (0.28)
.007 (0.18)
.180 (4.57)
.160 (4.06)
.059 (1.50)
.035 (0.89)
.010 (0.25)
.008 (0.20)
.067 (1.70)
.051 (1.30)
FM4740W
FM4741W
FM4742W
FM4743W
FM4744W
FM4745W
FM4746W
FM4747W
FM4748W
FM4749W
FM4750W
FM4751W
FM4752W
FM4753W
FM4754W
FM4755W
FM4756W
FM4757W
FM4758W
FM4759W
FM4760W
FM4761W
FM4762W
FM4763W
FM4739W
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
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
250.0
200.0
175.0
150.0
125.0
110.0
95.0
80.0
70.0
60.0
50.0
45.0
40.0
35.0
25.0
23.0
22.0
20.0
16.0
14.0
10.0
9.0
8.0
7.0
5.0
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
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
10.0
10.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
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
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
T Y P E
N O M I N A L
Z E N E R
V O LTA G E
at I
ZT
V
Z
(NOTE 1)
(Volts)
T E S T
C U R R E N T
I
Z T
( m A )
M A X I M U M D Y N A M I C
I M P E D A N C E
Z
ZT
at
I
Z T
(Ohms)
Z
ZK
at
(Ohms)
(NOTE 1)
I
Z K
( m A )
MAXIMUM DC REVERSE
L E A K A G E C U R R E N T
I
R
( u A )
V
R
(Volts)
M A X I M U M
SURGE
C U R R E N T
(NOTE 2)
I
R M
( m A p k )
M A X I M U M
F O RWA R D
V O LTA G E
at 200mA
V
F
(Volts)
2001-6
1.2
NOTES :
2. Surge current is a non-repetitive, 8.3ms pulse width square wave or equivalent sine-wave superimposed on
IZT
per JEDEC Method
1. Standard voltage tolerance is 10%, Suffix "A" : + 5%
3. Maximum steady state power dissipation is 1.0 watt at T
T
=75
o
C
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
RECTRON
RATING AND CHARACTERISTIC CURVES ( FM4735W THRU FM4763W )
FIG. 1 - MAXIMUM CONTINUOUS
POWER DISSIPATION
FIG. 3 - TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS FOR FM4763W
FIG. 5 - TYPICAL TEMPERATURE COEFFICIENTS
FIG. 2 - TYPICAL ZENER IMPEDANCE
TERMINALS TEMPERATURE,
INSTANTANEOUS FORWARD VOLTAGE,
VOLTS
I
ZT
, ZENER TEST CURRENT, mA
P
M
(AV), AVERAGE POWER
DISSIPATION, WATTS
INSTANTANEOUS FORWARD CURRENT,
AMPERES
Zz, DYNAMIC ZENER IMPEDANCE,
OHMS
1.0
1,000
100
10
1
25
50
0.5
10
100
500
75
100
125
150
175
0.75
0.5
0.25
10
1
0.1
Vz, TEMPERATURE COEFFICIENT,
mV/
0
10
30
50
70
90
110
0.4
0.6
0.8
1.0
1.2
Vz, ZENER VOLTAGE, VOLTS
0
10 20 30 40 50 60 70 80 90 100
1.4
1.6
0.01
0
60 Hz
RESISTIVE OR
INDUCTIVE LOAD
P.C.B.MOUNTED ON
0.31 X 0.31 X 0.08" (8 X 8 X 2mm)
COPPER AREAS PADS
PULSE WIDTH=300uS
1% DUTY CYCLE
TESTED at RATED IZT
T
J
= 25
FIG. 4 - TYPICAL REVERSE CHARACTERISTICS
PERCENT OF RATED ZENER VOLTAGE, %
INSTANTANEOUS REVERSE CURRENT,
MICROAMMPERES
10
1
0.1
0
20
40
60
80
100
0.01
T
J
= 100
T
J
= 25
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