UNIVERSITY OF CENTRAL FLORIDA
FACILITIES OPERATIONS
STANDARD OPERATING PROCEDURE
Subject: Contactor Replacement
FO-SOP-M05
Rev. 1
Page: 1 of 3
Last Modified: 5/04/2015
Approved by: Duane Siemen 4/14/2015
PROCEDURE:
Contactor Replacement Guide
INTENDED AUDIENCE:
FO Maintenance Personnel
PURPOSE:
Provide guidance for the selection and replacement of defective
contactors with an equivalent Allen Bradley contactor.
1) Motor Contactor Summary
When any brand of motor contactor fails, it can be replaced with an Allen Bradley contactor
that has the correct Horsepower, operational current and coil voltage rating. This is the
preferred avenue to follow when a contactor fails, especially in an emergency situation and
when the failed component is obsolete. A new overload module may also need to be installed
in conjunction with the contactor and must be selected and adjusted based on the full load amp
rating of the motor. Allen Bradley 100 series contactors have been added to stock for the
purpose of becoming the preferred contactor replacement part.
a) Important items to consider when selecting a replacement contactor:
 Horsepower of the motor.
 Rated Operational Current of the contactor.
 Coil voltage (120V or 24V).
 Full load amperage of the motor. The correct Overload relay must be installed.
 If the defective contactor is not DIN rail mounted, a short piece of 35mm wide DIN
rail (Allen Bradley #199DR1) will need to be installed for mounting the new
contactor.
b) How to read an Allen Bradley 100 series part number:
Example: 100-C43D10
 100-C = The Allen Bradley catalog number
 43 = Rated Operational Current (in this case 43 amps)
 D = coil voltage (D = 120v and KJ = 24v)
 10 = Auxiliary contacts, 1 N.O. and 0 N.C.
c) Overload Relay selection information: The overload relay module can only be used
with the associated contactor as listed in the table below. These are solid state
overloads and must be selected so that the full load amperage value on the motor
nameplate falls within the value range of the relay.
d) Contactor selection chart: Check the motor nameplate for the horsepower and full
load amps. Verify the coil voltage of the defective contactor. Use the chart below and
UNIVERSITY OF CENTRAL FLORIDA
FACILITIES OPERATIONS
STANDARD OPERATING PROCEDURE
FO-SOP-M05
Page: 2 of 3
Last Modified: 4/14/2015
Approved by: Duane Siemen 4/14/2015
Subject: Contactor Replacement
match the motor information and coil voltage to select the correct Allen Bradley
contactor for installation. When the contactor is selected, follow the row to the last two
columns on the right to select the correct overload relay. Remember to set the dial to
the amperage based on the motor nameplate amps.
Rated
Operational
Current
Motor
HP
Coil
Volts
100-C23D10
23A
1 - 15
120V
1
0
100-C23KJ10
23A
1 - 15
24V
1
0
100-C43D10
43A
16 - 30
120V
1
0
100-C43KJ10
100-C85D10
43A
85A
16 - 30
31 - 60
24V
120V
1
1
0
0
100-C85KJ10
100-C97D10
100-C97KJ10
85A
97A
97A
31 - 60
61 - 75
61 - 75
24V
120V
24V
1
1
1
0
0
0
Contactor Part
#
Contacts
N.O.
N.C.
OL Part #
193-EECB
193-EEEB
193-EECB
Current
Range
1A - 5A
5.4A - 27A
1A - 5A
193-EEEB
5.4A - 27A
193-EEFD
9A - 45A
193-EEGE
18A - 90A
193-EEVE
60A - 120A
2) Definite Purpose Contactor Summary
Definite purpose contactors are ideal for heating, air conditioning, refrigeration, data
processing and food service equipment. Compact 1 and 2 pole contactors are available
along with full size 2, 3, and 4 pole devices. When any brand of contactor fails, it can be
replaced with an Allen Bradley contactor that has the correct specifications as the one
being removed. This is the preferred avenue to follow in an emergency situation and when
the failed component is obsolete. There are new Allen Bradley Contactors currently in
stock that should be used as replacements when needed.
a) How to read an Allen Bradley 400 series part number:
Example: 400-DP25NJ1-B
 400 = Allen Bradley catalog number
 DP = Type, (Definite Purpose Contactor)
 25 = Max continuous amp rating
 N = No enclosure
UNIVERSITY OF CENTRAL FLORIDA
FACILITIES OPERATIONS
STANDARD OPERATING PROCEDURE
Page: 3 of 3
Last Modified: 4/14/2015
Approved by: Duane Siemen 4/14/2015
Subject: Contactor Replacement



FO-SOP-M05
J = Nominal coil voltage, (D is 120V and J is 24V)
1 = number of poles
B = Modifications, (Box lug in 2nd position)
b) Definite Purpose Contactor Selection Table:
The table below shows 4 definite purpose contactors that have been added to stock. The
first column shows the Allen Bradley part number and the last column is the part number of
the contactor that it can be used in place of. Compare the properties of the defective
contactor with those in the table to select the correct new contactor.
Note: the number in the last column is NOT the only contactor that the Allen Bradley
can replace.
Rated
Operational
Current
Coil
Voltage
Line
Voltage
400-DP25NJ1-B
25A
24V
600Vmax
400-DP25ND3
25A
120V
600Vmax
# of Poles
1 / with
shunt
3
400-DP40NJ3
40A
24V
600Vmax
3
Allen Bradley
Contactor Part #
100 Contactor Auxiliary Contact Block
Contacts
Allen Bradley P/N
N.O.
N.C.
100-FA20
2
0
100-FA11
1
1
100-FA02
0
2
>>>END OF PROCEDURE
Replaces
Honeywell
DP1025A5005/U
Eaton C25DND325A
Eaton C25DNF340T and
C25DNF240T