CONTACTS
Arrangement
SPST (1 Form A, 1 Form B)
SPDT (1 Form C)
Ratings
Resistive load:
Max. switched power: 480 W or 5540 VA
Max. switched current: 20 A
Max. switched voltage: 150* VDC or 380 VAC
*
Note: If switching voltage is greater than 30 VDC, special
precautions must be taken. Please contact the factory.
Rated Load
20 A at 277 VAC N.O. resistive, 50k cycles
UL, CUR
16 A at 240 VAC general use, 100k cycles
12 A at 277 VAC N.O. resistive., 100k cycles
20 A at
24 VDC resistive
1 HP 240 VAC
TV-8 120 VAC N.O. (silver tin oxide only)
TV
16 A at 30 VDC, 250 VAC resistive, 100k cycles
13 A at 420 VAC resistive, 100k cycles (1 Form A)
Material
Silver cadmium oxide (silver tin oxide available)
Resistance
< 50 milliohms initially
(24 V, 1 A voltage drop method)
AZ755
7/8/02W
20 AMP MINIATURE
POWER RELAY
FEATURES
Dielectric strength 5000 Vrms
Low cost
Epoxy sealed version available
20 Amp switching -- single pole contacts
Isolation spacing greater than 8mm
UL Class B insulation system standard, Class F available
UL, CUR file E44211
TV file R9659060
GENERAL DATA
Life Expectancy
Minimum operations
Mechanical
5 x 10
6
Electrical
5 x 10
4
at 16 A 240 VAC Res.
2 x 10
4
at 20 A 277 VAC Res.
Operate Time (typical)
8 ms at nominal coil voltage
Release Time (typical)
5 ms at nominal coil voltage
(with no coil suppression)
Dielectric Strength
5000 Vrms coil to contact
(at sea level for 1 min.) 1000 Vrms between open contacts
Insulation
1000 megohms min. at 20C
Resistance
500 VDC 50% RH
Dropout
Greater than 10% of nominal coil voltage
Ambient Temperature
At nominal coil voltage
Operating
-40C (-40F) to 90C (194F)
Storage
-40C (-40F) to 130C (266F)
Vibration
0.062" DA at 1055 Hz
Shock
10 g
Enclosure
P.B.T. polyester
Terminals
Tinned copper alloy, P. C.
Max. Solder Temp.
270C (518F)
Max. Solder Time
5 seconds
Max. Solvent Temp.
80C (176F)
Max. Immersion Time
30 Seconds
Weight
18.5 grams
COIL
Power
At Pickup Voltage
270 mW
(typical)
Max. Continuous
Dissipation
1.9 W at 20C (68F) ambient
Temperature Rise
34C (61F) at nominal coil voltage
Temperature
Max. 130C (266F)
NOTES
1. All values at 20C (68F).
2. Relay may pull in with less than "Must Operate" value.
3. Specifications subject to change without notice.
MECHANICAL DATA
Form A and C
Form A
WIRING DIAGRAM
PC BOARD LAYOUT
Form C
4
3
5
6
8
1
8
7
6
5
1
2
3
4
1.14
(29)
.160
.015
(4.2
.4)
1.06
(26.8)
.51
(13)
0.015
(0.38)
.08
(2.1)
(Form B & C only)
.590
(15)
.197
(5)
.197
(5)
.295 (7.5)
.05 DIA. (1.3)
(6 places Form A & B)
(8 places Form C)
Terminal No.
1,2,4,5,7,8
3,6
Dimensions Tol.: 0.005 (0.13)
0.018 (0.457) x 0.038 (0.965)
0.011 (0.279) x 0.038 (0.965)
Viewed toward terminals
Viewed toward terminals
(Form A and C only)
Form B
8
1
7
6
2 3
.500
(12.7)
1.22
(30.9)
1.28
(32.5)
.177
(4.5)
MAX
.354
(9.0)
.366
(9.3)
.125 DIA
(0.5)
.197
(5.0)
.295
(7.5)
.590 (15)
.197
(5.0)
.059 DIA
(1.5)
.118
(3.0)
.414
(10.5)
HARDWARE
RETAINING CLIP
Viewed toward terminals
.661 [16.79]
1.385 [35.19]
.895 [22.73]
ST484-U1
ST482-3
AZ755
7/8/02W
Dimensions in inches with metric equivalents in parentheses. Tolerance: .010"
RELAY ORDERING DATA
COIL SPECIFICATIONS
ORDER NUMBER*
Nominal Coil
Must Operate
Max. Continuous
Coil
Form A
Form C
VDC
VDC
VDC
Resistance
(SPST)
(SPDT)
5
3.6
9.4
47 10%
AZ7551A5D
AZ7551C5D
6
4.3
11.4
69 10%
AZ7551A6D
AZ7551C6D
9
6.5
17.4
155 10%
AZ7551A9D
AZ7551C9D
12
8.6
22.8
275 10%
AZ7551A12D
AZ7551C12D
18
13.0
27.9
620 10%
AZ7551A18D
AZ7551C18D
24
17.3
45.7
1100 15%
AZ7551A24D
AZ7551C24D
48
34.6
89.0
4400 15%
AZ7551A48D
AZ7551C48D
60
43.2
115.3
6880 15%
AZ7551A60D
AZ7551C60D
110**
79.3
170.5
22900 15%
AZ7551A110D
AZ7551C110D
*Add suffix "E" for epoxy sealed version, suffix "A" for AgSnO (silver tin oxide) contacts. Substitute "1B" in place of "1A" or "1C" to indicate 1 Form B
contact arrangement. Add suffix "F" for Class F.
**110V coil not TV approved.
HARDWARE ORDERING DATA
DESCRIPTION
ORDER NUMBER
DESCRIPTION
ORDER NUMBER
Socket
ST484U1
Retainer
ST4823
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