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53
HEAVY DUT Y RELAY
FEATURES
l High Performance
l Heavy duty up to 70Amps
l 6.3mm Flat terminals
l Suitable Couplers available
l Dual Contacts
APPLICATION
l A/C Blower
l A/C Compressor
l Engine Cooling Fan
l Radiator Fan
l Starter Motors
l Rear Window Defogger
l Battery Disconnection
TECHNICAL DATA FOR CONTACT SIDE :
Model : 53SO 53DO 53TO
Areas of Application
Contact Configuration : 1A 1A (Dual) 1A (Dual)
Contact Material : Silver Nickel Silver Nickel Silver Nickel / Tungsten*
Contact Rating at 25 C - 12VDC (Res.) : 40A 50A 70A
Electrical Life Operations Min. : 1 x 10 1 x 10 1 x 10
Mechanical Life Operations Min. : 1 x 10 1 x 10 1 x 10
Contact Voltage Drop at 10 A (Min) : 30mV 30mV 30mV
Maximum Switching Current
@ 12.8 VDC For 3 Sec.
*Dual Contact with Tungsten pre-contact / Silver nickel main contact
0
24VDC (Res.) : 20A 25A 35A
: 120A 150A 240A
RESISTIVE /INDUCTIVE/CAPACITIVE LOADS
5 5 5
6 6 6
GENERAL DATA FOR COIL SIDE
Nominal Coil Power : 1.92W (Approx)
Operating Power : 1.1W (Approx)
Operate Time** : 15 milli Seconds
Release Time** : 15 milli Seconds
** At nominal voltage without coil suppression (excluding bounce)
OPERATING CONDITIONS
Ambient Temperature : -25 C to +85 C
Maximum Temperature : 155 C
Dielectric Strength : 500VRMS
Insulation Resistance : 100 Meg. Ohms Min. At 500 VDC,
Vibration Resistance (without Change : 10-50Hz 4.4g (min)
in the switching state>10µS)
Shock Resistance (without Change : 30g, 8mS
in the switching state>10µS)
0 0
0
0
25 C RH 50
CIRCUIT DIAGRAM
*
R
30 85 86 87
30 85 86 87
* Parallel resistor or Diode Optional
Dual Contact
*
R
Singe Contact
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HOW TO ORDER
53 1 - 1A - 12 D 0 - XXX
COIL DATA
Product
Series
Specialities
If any
VDC
Nominal Voltage
0- No Resistor in
0-Without Bracket
1-With Bracket
Parallel to Coil
1 - With Resistor in
Parallel to Coil
S - Single Contact
D - Dual Contact
T - Dual Contact Heavy Duty
06 4.8 5.2 20
09 6.8 7.2 55
12 9.0 9.6 75
18 13.5 14.4 165
Nominal Coil Voltage
Contact Arrangement
1A - 1 Form A
(Refer Coil Data)
24 18.0 19.2 250
48 36.0 38.4 1100
***Lower pick-up Voltages available on request
DIMENSIONS
Relay without Bracket Relay with Bracket
28.0
28.0
25.5
33.0
Ø5.0
Pick-up
Version D
***Pick-up
Voltage VDC
Version T
Voltage VDC
without parallel
Coil Resistance
resistor in Ohms ±10%
28.0
19.0
4x0.8
8.4 8.4
2x0.8
4x6.30
85
87
86
10.35
17.9
30
MECHANICAL DATA
COVER RETENTION
Pull : 20KgF
Push : 20KgF
TERMINAL STRENGTH
Pull : 10KgF
11.5
28.0
46.0
25.5
4x0.8
4x6.30
2x0.8
AVAILABLE ON REQUEST
l High temperature winding wire
l Special coil resistance & pick-up
l For other custom solutions consult factory
8.0
11.5
Push : 10KgF
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DATA ON VARIOUS TESTS CONDUCTED FOR OPERATING CONDITIONS
TEST TEST CONDITION RESULT
Relay kept at 100 C
Coil Voltage : 14 VDC
0
*
Continuous Energisation test at
Extreme temperature Conditions
Thermal cycling
Shock Voltage
Load given : 25 A @ 12 VDC
Duration : 5 Sec. On, 5 Sec. OFF
No. of operation : 50000
The above test repeated at - 30 C for 50000
0
operations
Relay subjected to :-
0 0
-30 C to + 100 C in 2 Hrs. with coil ON
0
+100 C for 2 Hrs. with coil ON
0 0
+100 C to - 30 C in 2 Hrs. with 1 Hrs. Coil ON &
1 Hrs. Coil OFF
0
-30 C for t wo Hrs. with Coil ON
No. of Cycles : 3
Relay is subjected to :-
Max. Voltage : 100VDC
Shock Wave : Exponential Damping vibration
Time : 500 micro Sec.
Period : 30 Sec.
Test Time : 10 Hrs.
Relays successfully completed
100000 operations at given load
All operating parameters within
the specifications af ter test
Af ter the test, all operating parameters
of the relay are within specification.
Dropping Impact No change in operating
Jump Start
Corrosion Resistance No damage to relay par ts
Relays dropped from a height of 1 Meter to a
concrete floor
24 VDC for 1 minute conducting nominal current
0
at 23 C
5% Sodium Chloride solution
parameters of the relay.
Withstood successfully
applied to relay for 48 Hrs.
Water Resistance test
Horizontal Plane:23rev. / Min.
Water Pressure:0.03 Mpa
No water ingression inside the relay
Test time:10 Min
*Typical values for relays with 12 VDC coil. For higher severity please consult factory
All Parameters except the load given are same for 53 & 53PT Relays.
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