MS27418-1B

Manufacturer Part NumberMS27418-1B
DescriptionElectromechanical Relay 3PST-NO 25A 28VDC 160Ohm Stud Mount
ManufacturerLeach International
TypeHermetically Sealed Relay
MS27418-1B datasheet
 


Specifications of MS27418-1B

Contact Arrangement3PST-NOMountingStud Mount
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ENGINEERING DATA SHEET
APPLICATION NOTES:
101
102
103E
007
CONTACT ELECTRICAL CHARACTERISTICS
Contact rating per pole
and load type [1]
Resistive
Inductive [9]
Motor
Lamp
Overload
Rupture
©
Featuring
LEACH
power and control solutions
www.esterline.com
Data sheets are for initial product selection and comparison. Contact Esterline Power Systems prior to choosing a component.
Date of issue: 01/07
Hermetically sealed
Contact arrangement
Designed to the
performance standards of
PRINCIPLE TECHNICAL CHARACTERISTICS
Contacts rated at
Weight
Dimensions
Load current in Amps
@28 Vdc
@115 Vac
@115/200 Vac
400 Hz
400 Hz, 3 Ø
25
25
15
25
20
20
10
10
80
120
100
150
AMERICAS
6900 Orangethorpe Ave.
P.O. Box 5032
Buena Park, CA 90622
.
.
Tel: (01) 714-736-7599
Fax: (01) 714-670-1145
- 171 -
SERIES 9324
RELAY - NONLATCH
25 AMP, 3 PST/NO
3 PST/NO
MIL-PRF-6106
28 Vdc; 115 Vac 60 Hz/400 Hz, 1 Ø
115/200 Vac, 400 Hz, 3 Ø
115/200 Vac 60 Hz, 3 Ø
0.66 lb max
1.47in x 2.50in x 2.40in
@120/28 Vac
50/60 Hz, 1 & 3 Ø
25
25
25
25
20
12
10
10
120
N/A
150
N/A
EUROPE
ASIA
2 Rue Goethe
Units 602-603 6/F Lakeside 1
57430 Sarralbe
No.8 Science Park West Avenue
France
Phase Two, Hong Kong Science Park
.
Pak Shek Kok, Tai Po, N.T.
.
Hong Kong
Tel: (33) 3 87 97 31 01
Tel: (852) 2 191 3830
Fax: (33) 3 87 97 96 86
Fax: (852) 2 389 5803
@440 Vac 60 Hz
DELTA [2]
3.5
-
-
-
-
-
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MS27418-1B Summary of contents

  • Page 1

    ENGINEERING DATA SHEET APPLICATION NOTES: 101 102 103E 007 CONTACT ELECTRICAL CHARACTERISTICS Contact rating per pole and load type [1] Resistive Inductive [9] Motor Lamp Overload Rupture © Featuring LEACH power and control solutions www.esterline.com Data sheets are for initial ...

  • Page 2

    COIL CHARACTERISTICS (Vdc) COIL DATA Nominal operating voltage Maximum operating voltage Pick-up voltage, maximum at +125° C Drop-out voltage, maximum Coil resistance ±10% at +25° C Coil current max +25° C GENERAL CHARACTERISTICS Temperature range Minimum operating cycles ...

  • Page 3

    ... Release time is .015 sec max. @ 25°C & nominal 28 Vdc when suppressed coil is used. [9] Inductive load life is 20 percent of rated resistive load life. Date of issue: 01/07 28 VDC SUPPRESSED 28 VDC 9324-8214 9324-10314 MS27418-1B MS27418-1D 9324-7424 9324-10315 MS27418-2B MS27418-2D - 173 - SERIES 9324 115 VAC, 400 HZ ...

  • Page 4

    CONFIGURATION MOUNTING STYLE 1 1.680 MAX +.032 .375 -.000 1.187 .080 ±.002 DIA 1.531 MAX 1.531 MAX LETTERS AND NUMBERS ARE FOR REFERENCE ONLY AND DO NOT APPEAR ON HEADER MODEL NUMBER WEIGHT ...

  • Page 5

    MOUNTING DATA .59 1.187 ±.005 SUGGESTED MOUNTING HOLE LAYOUT FOR STUD MOUNTING Date of issue: 01/07 MOUNTING DATA 1.062 ±.005 .244 1.406 ±.005 DIA .59 1.187 ±.005 +.005 .152 DIA -.001 4 PLACES SUGGESTED MOUNTING HOLE LAYOUT - 175 - ...

  • Page 6

    Application notes DERATING OF CONTACTS FOR DC VOLTAGES 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 ...

  • Page 7

    ... Change in coil resistance due to change of ambient temperature can be calculated by the following formula. "Rule of Thumb" : For each 10°C change of temperature, coil resistance will change approximately 4%. 2. High and low temperature pick up voltage Date of issue: 6/00 RELAYS AND TEMPERATURE VARIATIONS Operating Current Voltage DOWN UP ...

  • Page 8

    Calculation of coil temperature rise when R initial and R final are known: Delta T = (234 Delta T = Temperature rise (° Initial temperature (°C) 1 ...

  • Page 9

    Application notes CURVES FOR DC VOLTAGES ABOVE NORMAL RATING: RESISTIVE LOAD ONLY Date of issue: 6/00 (without arc suppression N°103E Page ...

  • Page 10

    Application notes The inductive nature of relay coils allows them to create magnetic forces which are converted to mechanical movements to operate contact systems. When voltage is applied to a coil, the resulting current generates a magnetic flux, creating mechanical ...

  • Page 11

    Types of suppressors: Passive devices. The resistor capacitor circuit It eliminates the power dissipation problem, as well as fast voltage rises. With a proper match between coil and resistor, approximate capacitance value can be calculated from 0.02xT/R, where ...

  • Page 12

    ... At the opening time the current becomes constant as a result of practically zero opening speed. Due to this kind of behavior, this type of suppression must be avoided for power relays. For small relays which have to switch low currents of less than 0.2 A, degradation of life is not that significant and the method may be acceptable. ...

  • Page 13

    The diode + resistor network It eliminates the inconvenience of the resistor alone, explained above, and it limits the action of a single diode now preferred to used the diode + zener network. The diode + zener network ...