T531
ENGINEERING DATA SHEET
TIME DELAY RELAY
3 PDT, 25 AMP
Time delay relay on operate or on release
Fixed or adjustable timing delay
Contact arrangement
Power supply
3 PDT
28 Vdc
PRINCIPLE TECHNICAL CHARACTERISTICS
Contacts rated at
Weight
Dimensions of case
25 Amps / 28 Vdc
<0.265lb
1.73in x 1.54in x 1.02in max
APPLICABLE SOCKET:
SO-1058-8913
Hermetically sealed corrosion protected metal can (mounting flange tin
plated)
CONTACT ELECTRICAL CHARACTERISTICS
Minimum operating cycles
50,000 cycles
10,000 cycles
50,000 cycles
50,000 cycles
50 cycles
Contact rating per
pole and load type
on resistive load
on inductive load (L/R=5ms)
on motor load
on lamp load
resistive overload
Load Current in Amps
@28Vdc
25
12
10
5
50
NUMBERING SYSTEM
T531 - A E - 1001 - B
Basic series designation__________________________|
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|
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1-Types Of Operation (A,B,D,U,W)__________________________| |
|
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2-Temperature range and timing accuracy (E,L,M,J,K,N)_______|
|
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3-Timing range (4 digits)________________________________________|
|
4-Mounting style and terminal types (B,C,D)[3]__________________________|
North America
6900 Orangethorpe Ave.
P.O. Box 5032
Buena Park, CA 90622 USA
Europe, SA
2 Rue Goethe
57430 Sarralbe
France
Tel: (33) 3 87 97 98 97
Fax: (33) 3 87 97 84 04
Asia-Pacific Ltd.
20/F Shing Hing Commercial Bldg.
21-27 Wing Kut Street
Central, Hong Kong
Tel: (852) 2 191 2886
Fax: (852) 2 389 5803
www.leachintl.com
Tel: (01) 714-736-7599
Fax: (01) 714-670-1145
Data sheets are for initial product selection and comparison. Contact Leach International prior to choosing a component.
Date of issue:
9/07
- 66 -
Page 1 of 4
TYPES OF OPERATION
28 V
CODE A : TIME DELAY ON OPERATE,
FIXED TIME
0 V
TIME
CODE B : TIME DELAY ON OPERATE,
OUTPUT
ADJUSTABLE WITH EXTERNAL RESISTOR
DE-ENERGIZED
T531
POWER SUPPLY
ENERGIZED
28 V
0 V
CODE D : TIME DELAY ON RELEASE,
POSITIVE CONTROL, FIXED TIME
CONTROL
POWER SUPPLY
ENERGIZED
OUTPUT
DE-
TIME
ENERGIZED
CODE U : TIME DELAY ON RELEASE,
FIXED TIME
CODE W : TIME DELAY ON RELEASE,
28 V
0 V
POWER SUPPLY
TIME
ADJUSTABLE WITH EXTERNAL RESISTOR OUTPUT
ENERGIZED
DE-ENERGIZED
TEMPERATURE RANGE AND TIMING ACCURACY
Code
E
L [4]
M [4]
J [4]
K [4]
N [4]
Temperature
-55° C to +85° C
-55° C to +85° C
-55° C to +85° C
-55° C to +125° C
-55° C to +100° C
-55° C to +100° C
Accuracy
±10%
±5%
±3%
±10%
±5%
±3%
Limitations
±10 ms below 200 ms
not below 500 ms
not below 1 s
±10 ms below 200ms
not below 500 ms
not below 1 s
Date of issue:
9/07
- 67 -
Page 2 of 4
MOUNTING STYLES AND TERMINAL TYPES
16
26 MAX
3.8
3.8
±0.13
±0.1
+0.1
11
-0.15
T531
7.6
-0.1
23.8
MAX
+0.15
1.27
44 MAX
35.5
36.7
±0.13
+0.1
7.6
-0.15
1
35.5
36.7
44 MAX
1.27
±0.1
+0.03
5.9
-0.1
Ø1
-0.03
+0.07
+0.15
15.9
Ø1
-0.03
+0.07
Ø2.4
-0.1
+0.04
Ø1.6
-0.05
3.8
23.8
MAX
39
MAX
B
C
1
D
15.9
15.9
1.3
6.3
±0.1
7
Ø2.4
-0.1
+0.01
9.5 7.6
4
±0.15
SILICON GASKET
SHORE
A 15-30
SOLDER HOOKS
Dimensions in mm
Tolerances unless otherwise specified ±0.25 mm
GOLD PLATED PINS
SOLDER HOOKS
SCHEMATIC DIAGRAM/TERMINAL LAYOUT
TIME DELAY ON OPERATE
OR ON RELEASE
1
RX
Y1
X2
B
+
-
2
3
TIME DELAY ON RELEASE WITH
POSITIVE CONTROL VOLTAGE (Y1)
C
1
Y1
X2
B
+
-
2
3
C
TD
X1
+
-
TD
X1
+
-
A
Y2
A
RX : EXTERNAL RESISTOR
Y2
TIMING RANGE
ADJUSTABLE
Code 1001:
Code 1002:
Code 1003:
Code 1004:
(For operation code B, F and W)
0.1 to 1 second
Rx = (T / to -1) x 100kohm
1 to 10 seconds
10 to 100 seconds
100 to 1000 seconds
where Rx in kohms T: desired time in seconds,
to: time measured with Rx = 0.
Example to determine Rx value for a T time of 5 seconds:
Choose code 1002; measure time with
Rx = 0 (for example : to = 1 s); calculate Rx = (5/1 - 1) x 100000
Theoretical resistance: Rx = 400 kohms
FIXED
The timing code consists of 4 digits. To determine this code, convert the value to milliseconds
value. Use the first 3 digits of this value and add a fourth digit to indicate the number of
zeros which must follow the three digits to show complete milliseconds value.
Examples: 250 ms --> Code 2500
300 s --> Code 3003
Date of issue:
9/07
- 68 -
Page 3 of 4
GENERAL CHARACTERISTICS
Operating Voltage
Recycle Time
Dielectric strength at sea level
- all pins connected together and can
- between open contacts
Dielectric strength at altitude 80,000 ft, all points
Initial insulation resistance at 500 Vdc
Sinusoidal vibration
Shock
Power loss protection
Undamaged against positive transients
Spike susceptibility
Self generated spikes
500 V / 50 Hz
500 V / 50 Hz
250 V / 50 Hz
greater than or equal to 500 M
Ω
20G / 10 to 2000 Hz
100G / 6 ms
0.5 ms max
+ 80 Vdc
± 600 Vdc
± 50 Vdc
18 to 32 Vdc (AIR norm 2021 E)
less than or equal to 50 ms
T531
NOTES
1. Relays with C mounting are compatible with socket families S 502, SF 502 ..
2. Isolation spacer pads for PCB mounting available on request.
3. For other mounting styles or terminal types, please contact the factory.
4. Codes L, M, K and N not available for adjustable timing.
Date of issue:
9/07
- 69 -
Page 4 of 4
ENGINEERING DATA SHEET
SO-1058-8913
RELAY SOCKET
25 AMP
BASIC SOCKET SERIES DESIGNATION FOR:
Series KCL and T531
DESIGNED TO THE STANDARDS AND REQUIREMENTS OF:
MIL-S-12883/54
SOCKET DRAWING
.630
.432
.06R MIN
4 PLACES
.19R MAX
4 PLACES
HARDWARE MOUNTING
MOUNTING DETAIL 3 PLACES
RELAY
SILICONE RUBBER
GASKET
.234
3
2
Y1
1
C
X2
X1
1.015
MAX
.625
.312
B
Y2
A
.093 MAX
PANEL
SOCKET
1.406
1.00
1.406
1.72
NO. 10-32 UNF-2A
3 PLACES
NO. 4-40 UNC-2A
3 PLACES
MOUNTING STUD
STAINLESS STEEL
3 PLACES
.312
.550
1.100
.093
.220
.890
1.07
.625
BOTTOM MOUNT-CLEARANCE
HOLE FOR .192 SCREW
TOP MOUNT-CLEARANCE
HOLE FOR .112 SCREW
1.160
.05 R
4 PLACES
MOUNTING DIMENSIONS
NO. 4-40 UNC-2A
3 PLACES
SUGGESTED MOUNTING
HOLE LAYOUT
GENERAL CHARACTERISTICS
1. Supplied with mounting hardware No. 12, 16 and 20 contacts, No. 12, 16 and 20 crimps.
2. Standard tolerances
3. Weight
4. Temperature range
North America
6900 Orangethorpe Ave.
P.O. Box 5032
Buena Park, CA 90622 USA
.xx ±.01; xxx ±.005
.120 lb. max
-70° C to +125° C
Europe, SA
2 Rue Goethe
57430 Sarralbe
France
Tel: (33) 3 87 97 98 97
Fax: (33) 3 87 97 84 04
Asia-Pacific Ltd.
20/F Shing Hing Commercial Bldg.
21-27 Wing Kut Street
Central, Hong Kong
Tel: (852) 2 191 2886
Fax: (852) 2 389 5803
www.leachintl.com
Tel: (01) 714-736-7599
Fax: (01) 714-670-1145
Data sheets are for initial product selection and comparison. Contact Leach International prior to choosing a component.
Date of issue: 3/06
- 16 -
Page 1 of 1
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