MS27751K
TABLE II. Rated contact load (amperes per pole) (case grounded).
Type of load |
Life opera ting cycle s x 103 |
28 V dc |
115 V ac, 1 phase |
115/200 V ac, 3 phase 2/ |
See appro priate notes |
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Main |
Aux 1/ |
Main |
Aux 1/ |
Main |
Aux |
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NO |
NC |
NO |
NC |
400 Hz |
60 Hz |
400 Hz |
60 Hz |
400 Hz |
60 Hz |
400 Hz |
60 Hz |
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Resistive |
50 |
50 |
50 |
3 |
3 |
60 |
3 |
60 |
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Inductive |
20 |
20 |
20 |
3 |
3 |
3 |
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Inductive |
50 |
2 |
2 |
60 |
2 |
60 |
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Motor |
50 |
20 |
20 |
40 |
40 |
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Lamp |
50 |
10 |
10 |
1 |
1 |
15 |
1 |
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Transfer, load |
10 |
12.5/ 60 |
12.5/ 60 |
3/ |
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Mechanical life reduced current |
200 |
7 |
7 |
1 |
1 |
14 |
1 |
14 |
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Mixed loads |
60 |
1 |
1 |
5 |
5 |
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1/ Applicable to -5 through -10 and -15 through -20.
2/ Absence of value indicates relay is not rated for 3 phase application.
3/ Transfer load indicates relay is suitable for transfer between unsynchronized ac power supplies of rating indicated:
12.5 amperes -1 through -10 and -21; 60 amperes -11 through -20.
Application notes:
1. Examination of product, external parts, shall be performed in accordance with MIL-PRF-6106, except that the case
temperature shall be limited to 150°C maximum.
2. Strength of terminals shall be performed in accordance with MIL-PRF-6106, except that test shall be performed at room ambient temperature only.
TABLE III. Operating characteristics.
1/ PIN MS 27751- |
Coil data |
Time - (milliseconds maximum) |
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Coil |
Nominal |
Max |
Max pick-up voltage |
Hold vol- tage 4 |
Drop out volt- age 4/ |
Oper -ate 5/ |
Rel- ease 6/ |
Contact Bounce |
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Volts 3/ |
Freq Hz |
n Res |
Volts 3/ |
Amp at 25°C |
Rated 4/ |
High temp test |
Cont cur- rent test |
Main |
Aux 2/ |
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NO |
NC |
NO |
NC |
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-1, -3, -5 -7, -9, -11, -13 -15, -17 -19, -21 7/ |
X1,X2 |
28 |
dc |
200 |
29 |
.160 |
18 |
20 |
21 |
7.0 |
1.5 |
50 |
25 |
3 |
3 |
4 |
4 |
|
-2, -4, -6 -8, -10 -12, -14 -16, -18 -20 7/ |
X1,X2 |
115 |
400 8/ |
--- |
124 |
.100 |
90 |
95 |
100 |
35 |
5.0 |
50 |
80 |
3 |
3 |
4 |
4 |
1/ Contact transfer time at rated voltage is 1.8 milliseconds minimum for -11 through -20.
2/ Applicable to -5 through -10 and -15 through -20.
3/ Caution: The use of any coil voltage less than the rated coil voltage will compromise the operation of the relay.
4/ Over the temperature range.
5/ with rated coil voltage.
6/ From rated coil voltage.
7/ Applicable to -21 only. coil suppression (transient voltage back EMF) shall be 42 V dc max.
8/ Will operate on 115 V ac, 60 Hz with slightly higher coil current.
6
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