RECTRON
SEMICONDUCTOR
TECHNICAL SPECIFICATION
FM4735
THRU
FM4763
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)
FM4735
FM4736
FM4737
FM4738
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
2001-6
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)
FM4739
FM4740
FM4741
FM4742
FM4743
FM4744
FM4745
FM4746
FM4747
FM4748
FM4749
FM4750
FM4751
FM4752
FM4753
FM4754
FM4755
FM4756
FM4757
FM4758
FM4759
FM4760
FM4761
FM4762
FM4763
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)
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
MAXIMUM
F O RWA R D
V O LTA G E
at 200mA
V
F
(Volts)
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
2001-6
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
NOTES : 1. Standard voltage tolerance is 10%, Suffix “A” : + 5%
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 ( FM4735 THRU FM4763 )
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 FM4763
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
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