SERIES KC
ENGINEERING DATA SHEET
RELAY - NONLATCH
3 PDT, 25 AMP
All welded construction
Contact arrangement
Qualified to
3 PDT configuration in one inch
cube
MIL-PRF-6106
PRINCIPLE TECHNICAL CHARACTERISTICS
Contacts rated at
Weight
Dimensions
28 Vdc; 115 Vac, 400 Hz, 1Ø
and 115/200 Vac, 400 Hz 3Ø
0.188lb max
1.01in x 1.01in x 1.00in
Hermetically sealed, corrosion resistant metal can.
Detail specifications and ordering data appear on the following
pages.
APPLICATION NOTES:
101
102
103E
007
APPLICABLE SOCKET:
SO-1057-8912
CONTACT ELECTRICAL CHARACTERISTICS
Contact rating
per pole and load
type [1]
Resistive [2]
Inductive [3]
Motor
Lamp
Overload
Rupture
Circuit Breaker
Compatible [10]
Load current in Amps
@28 Vdc
25
12
10
5
40
60
-
@115 Vac 400
Hz
25
15
10
5
80
100
-
@115/200 Vac, 400 Hz, 3Ø
25
15
10
5
80
100
-
@115/200 Vac, 60 Hz, 3Ø [9]
2.5
2.5
2
1
N/A
N/A
Featuring
LEACH
©
power and control solutions
www.esterline.com
AMERICAS
6900 Orangethorpe Ave.
P.O. Box 5032
Buena Park, CA 90622
.
.
Tel: (01) 714-736-7599
Fax: (01) 714-670-1145
EUROPE
2 Rue Goethe
57430 Sarralbe
France
.
.
Tel: (33) 3 87 97 31 01
Fax: (33) 3 87 97 96 86
ASIA
Units 602-603 6/F Lakeside 1
No.8 Science Park West Avenue
Phase Two, Hong Kong Science Park
Pak Shek Kok, Tai Po, N.T.
Hong Kong
Tel: (852) 2 191 3830
Fax: (852) 2 389 5803
Data sheets are for initial product selection and comparison. Contact Esterline Power Systems prior to choosing a component.
Date of issue: 07/10
- 150 -
Page 1 of 4
COIL CHARACTERISTICS (Vdc)
CODE
Nominal operating voltage
Maximum operating voltage
Maximum pickup voltage
- Cold coil at +125° C
- During high temp test at +125° C
- During continuous current test at +125° C
Maximum drop-out voltage
Coil resistance
Ω
±10% at +25° C except types "C"
and "V" +20%, -10%
18
19.8
22.5
7
290
9
9.9
11.25
4.5
70
4.5
5
5.7
2.5
18
36
38
42
14
890
18
19.8
22.5
7
290
9
9.9
A
28
29
B
12
14.5
C
6
7.3
M
48
50
N [7]
28
29
12
SERIES KC
R [7]
14.5
V [7]
6
7.3
4.5
5
5.7
2.5
18
11.25
4.5
70
GENERAL CHARACTERISTICS
Temperature range
Minimum operating cycles (life) at rated load
Minimum operating cycles (life) at 25% rated load
Dielectric strength at sea level
- All circuits to ground and circuit to circuit
- Coil to ground
Dielectric strength at altitude 80,000 ft
Insulation resistance
- Initial (500 Vdc)
- After environmental tests (500 Vdc)
Sinusoidal vibration (A and D mounting)
Sinusoidal vibration (J mounting)
Random vibration
- Applicable specification
- Method
- Test condition - A and D mounting
- Test condition - G and J mounting
- Duration
Shock (A, D and W mounting)
Shock (J mounting)
Maximum contact opening time under vibration and shock
Operate time at nominal voltage@25°C
Release time at nominal voltage@25°C
Contact make bounce at nominal voltage@25°C
Contact release break bounce at nominal voltage@25°C
MIL-STD-202
214
1G (0.4G
2
/Hz, 50 to 2000 Hz)
1E (0.2G
2
/Hz, 50 to 2000 Hz)
15 minutes each plane
200G / 6 ms
100G / 6 ms
10 µs
15 ms max
15 ms max
1 ms max
0.1 ms max [8]
100 M
Ω
min
50 M
Ω
min
0.12DA / 10 to 70 Hz
30G / 70 to 3000 Hz
0.12DA / 10 to 57 Hz
20G /57 to 3000 Hz
1250 Vrms
1000 Vrms
500 Vrms [4]
-70°C to +125°C
50,000 [3]
200,000
Weight maximum
0.188lb
Unless otherwise noted, the specified temperature range applies to all relay characteristics.
Date of issue:
7/10
- 151 -
Page 2 of 4
NOTES
[1] Standard Intermediate current test applicable.
[2] For full rated load, max. temp. and altitude use no. 12 wire or larger.
Solder hook relays to be mounted to limit mounting bracket temp. to 160° C.
[3] DC inductive load 10,000 cycles, AC inductive load 20,000 cycles.
[4] 500 Vrms with silicone gasket compressed, 350 Vrms all other conditions.
5. Applicable military specification: MIL-PRF-83536.
6. Special models available: Dry circuit, high reliability testing, etc.
[7] "N, R & V" coils have back EMF suppression to - 42 volts maximum.
[8] Applies to "N, R & V" coils only.
[9] 60 Hz load life, 10,000 cycles.
10. Time current relay characteristics per MIL-PRF-6106.
11. Relay will not operate, but will not be damaged by application of reverse polarity to coil.
SERIES KC
NUMBERING SYSTEM
KC - A
4
A
Basic series designation__________________________|
|
|
|
1-Mounting Style (A,D,J,W)____________________________|
|
|
2-Terminal Types (1,2,4)__________________________________|
|
3-Coil Voltage see coil characteristics (A,B,C,M,N,R or V)____|
MOUNTING STYLES
.156
.040
1.000
1.015
1.000
1.396
FULL R
6 PLACES
1.015
1.015 .937
.150 TYP
.625
1.446
1.718 MAX
.312
1.015
MOUNTING STYLE A
1.396
FULL R
8 PLACES
MOUNTING STYLE D
1.015
.937
.150
TYP
.625
FOR USE WITH TRACK MOUNT
SYSTEM. NOTE: TRACK SYSTEM
NOT AVAILABLE FROM LEACH
1.025
MAX
1.446
.089
1.015
+
-
.005
.040
1.015
.097
+
.005 THK SILICONE
-
RUBBER GASKET
1.025 MAX
1.718 MAX
MOUNTING STYLE J
Date of issue:
07/10
- 152 -
MOUNTING STYLE W
Page 3 of 4
TERMINAL TYPES
SERIES KC
Standard Tolerance: .XX ±.03; .XXX ±.010 INCHES
Date of issue: 07/10
- 153 -
Page 4 of 4
Application notes
DERATING OF CONTACTS FOR DC VOLTAGES
ABOVE NOMINAL RATING
N°101
To establish a standard for the derating of relay contacts is, at best, a subjective practice. Limitations are governed by the type
of relay, contact gap, maximum voltage capabilities of the relay contact system, and the contact material.
The most common method is to derate the contacts by use of the Power Formula, using the known current and voltage.
This method is valid only for
Resistive Loads,
and is an approximation only; keeping in mind the limitations mentioned above.
Power = IE (Current x Voltage)
I
2
E
2
= 2/3 I
1
E
1
Example:
A designer is working with a 55 volt DC system and has a relay rated at 10 amps resistive at 28 volts DC.
What is the maximum current that can be switched at 55 Vdc.
I
1
= 10 Amperes
E
1
= 28 VDC
E
2
= 55 VDC
I
2
= ? (Current ratings at 55 VDC Resistive)
I
2
E
2
= 2 I
1
E
1
/3
I
2
= 2 I
1
E
1
/E
2
3
= 2 (10 x 28)/55 x 3
= 560/165
I
2
= 3.4 Amperes at 55VDC
In addition, the user should always be concerned about the following:
1. Derating contacts that are rated for less than 10 Amperes at nominal voltage.
2. Derating contacts for use in system voltages above 130 Volts DC
Date of issue: 6/00
- 14 -
Page 1 of 1
