255 Series - Industrial Latching Relays
3PDT or 4PST, 10 Amp
File No. E13224
The 255 Series is a two coil latching version of the general purpose type 219 relay. When the
operate coil is momentarily energized, contacts transfer and remain so even after coil power is
removed. The second coil when momentarly energized, provides electrical reset of the contacts.
All contacts operate from a common armature to prevent contatct overlapping. Coils are rated for
continous duty. Both coils can be energized at the same time with no damage. The operate coil is
dominant
GENERAL SPECIFICATIONS (@ 25° C)
Contacts:
Contact Configuration
Contact Material
Contact Rating
120 / 240VAC Resistive
28VDC Resistive
Contact Resistance, Initial
Coil:
Coils Available
Nominal Coil Power
Input Voltage Tolerance - AC
Input Voltage Tolerance - DC
Drop out voltage
Duty
Timing:
Operate Time (max)
Release Time (max)
Up to 3PDT or 4PST
Silver Alloy Gold Diffused
10 Amp / 5 Amp
10 Amp
100 milliohms max @ 6VDC
AC and DC
4.9VA 1.8W
85% to 110% of nominal
80% to 110% of nominal
10% of nominal
Continuous
25mS
20mS
Operate
255 Wire Diagram
(Top View)
6
5
4
3
2
1
Dielectric Strength:
1500Vrms
Across Open Contacts
1500Vrms
Between Mutally Insulated Points
100 Megohms min @ 500VDC
Insulation Resistance
Temperature:
Operating
Storage
Life Expectancy:
Electrical (full load operations)
Mechanical (no load operations)
Miscellaneous:
Mounting Position
Mating Socket
Enclosure
Weight
-20 to 60°C (-4 to 140°F)
-40 to 105°C (-40 to 221°F)
Reset
8
7
9
10
11
12
255XBX (DPDT)
6
5
4
3
2
1
Operate
100,000
10,000,000
Any
27390D
Clear Polycarbonate
11.8oz (300 grams)
6
Reset
8
7
9
10
11
12
255ABX (1 N.O + DPDT)
Reset
5
4
3
2
1
6
5
4
3
2
1
Operate
Operate
Reset
8
7
8
9
10
11
12
7
9
10
11
12
255XCX (3PDT)
255BXB (2 N.O. + 2 N.C.)
4/7
www.struthers-dunn.com
(843) 664-3303
Latching / Sequencing Relays
10 - 100 Amp
Voltage
Make
Carry
Resistive Inductive
120VAC
30 Amp 10 Amp 10 Amp
3 Amp
240VAC
30 Amp 10 Amp
5 Amp
1 Amp
24VDC
30 Amp 10 Amp
10 Amp 5 Amp
28VDC
30 Amp 10 Amp 10 Amp
3 Amp
125VDC
30 Amp 10 Amp
0.5 Amp 0.1 Amp
For versions with suffix “69” permanent magnet blowouts
Voltage
Make
Carry
Resistive Inductive
125VDC (SM) 30 Amp 10 Amp 1.5 Amp 0.5 Amp
125VDC (DM) 30 Amp 10 Amp 4 Amp
1.5 Amp
250VDC (SM) 30 Amp 10 Amp
0.5 Amp 150 mAmp
250VDC (DM) 30 Amp 10 Amp 1.5 Amp 0.5 Amp
Note: SM = Single make
DM = Double make
255 Contact Load Specifications
Dimensions Shown in inches & (millimeters)
Outline Dimensions
3.72
(94.4)
4.52
(114.8)
1.44
(36.7)
6
5
4
3
2
1
2.63
(66.8)
Reset coil (1.4W)
Operate Coil (1.8W)
Nominal Resistance
Coil Power Resistance Coil Current
voltage ohms
(mA)
ohms
(mA)
±10%
±10%
6
21.0
286
15.5
385
12
85.0
141
63.5
189
24
300
80
250
96.0
115/125 8000
14.4
6200
20.0
DC relays, 1.8 Watts (2.5 Watts @ 125VDC)
DC Coil
Ordering Code
Series
255
255
XCX
P
Contact Arrangement
XBX (DPDT) - (2 form C)
XCX (3PDT) - (3 form C)
ABX (DPDT & 1 N.O. contact)
BXB (DPDT-N.O. & 2 form C)
Standard Features
Polycarbonate cover - CODE P
Optional Features
Permanent magnet blowout - CODE 69
Indicator lamp across both coils - CODE L
Manual actuator - CODE M
Coil Voltage
AC: 6, 12, 24, 120, 240 (Add VAC)
DC: 6, 12, 24, 48, 115-125 (Add VDC)
www.struthers-dunn.com
(843) 664-3303
12
11
10
9
8
7
Coil, 50/60HZ
Reset coil (3VA)
Operate Coil (5VA)
Nominal Resistance
Coil Power Resistance Coil Current
voltage ohms
(mA)
ohms
(mA)
±10%
±10%
6
3.0
840
1.10
800
12
14.5
256
4.20
410
24
52.0
150
15.5
200
120
1450
26.5
540
45.0
240
5000
4.8
1815
13.2
Current inrush on all AC coils is less than twice the listed milliam-
peres ratings as shown in the AC coil data table. *Currents shown
in table measured at 60Hz
Coil Specifications
*
AC
Optional manual
actuator
LM-
4/8
Section 4
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