C L A S S
GENERAL SPECIFICATIONS
389
SPECIFICATIONS CLASS 389 RELAYS
COIL
Pull-in voltage:
80% of nominal voltage or less. for DC coils.
85% of nominal voltage or less for AC coils.
10% of nominal voltage or more.
Dropout voltage:
Coil resistance:
Nominal power:
Maximum coil dissipation:
Duty:
± 10 % Measured at 25˚C
1.44 Watts for DC coils, 2VA to 3.5VA for AC coils
Capability of DC coils 2.5 Watts max.
Continuous
Insulation System:
Class "B" coil system. (130˚C per UL std. 1446).
CONTACTS
Contact material:
Contact Gap:
1/4" silver cadmium oxide, gold flashed.
.015 min. is standard.
Contact resistance:
50 Milliohms maximum initial resistance at rated current
TIMING
Operate time, (excluding bounce):
Release time, (excluding bounce):
20 milliseconds max.at nominal voltage.
20 milliseconds max.at nominal voltage.
DIELECTRIC STRENGTH
Insulation resistance:
1,000 Megohms min. @ 500 VDC
TEMPERATURE
Operating:
Storage:
-30˚C to +50˚C (AC), -30˚C to +65˚C (DC)
-30˚C to 100˚C
LIFE
Electrical:
Mechanical:
100,000 at rated load.
5 Million Operations no load
MISCELLANEOUS
Enclosure:
Operating Position:
Insulation material:
Terminals:
Clear Polycarbonate dust cover
Any
Molded plastic
1/4" x .032 Q.C. Terminals suitable for solder or Q.C. connectors,
also available with Printed Circuit terminals. (.090 x .032)
3.3 oz.. (94 g approx. with cover).
Weight:
The 300 series was developed as a 600 Volt relay that would accept 1/4" booted
terminals. Its extra spacing permits contact gaps to 2 millimeters when required.
This increases dielectric strength across open contacts to 2500 Volts RMS.
Consult factory for details or additional information.
ALSO
AVAILABLE
2.53
(64.29)
1.90Max.
(48.4)
1.41
(35.8)
OPTIONAL
TOP FLANGE COVER
IS AVAILABLE ON
SPECIAL ORDER.
1.40Max.
(35.5)
CONSULT FACTORY.
.500
(12.7)
PAGE 27
WEBSITE: www.magnecraft.com - EMAIL:info@magnecraft.com - FAX ON DEMAND 1-800/891-2957 - DOCUMENT 100