RU Series
RU Series — General Purpose Relays
Key features of the RU series include:
• Non-polarized LED indicator standard
• Solder-free construction (spot welded, no solder points, lead-free)
• No internal wires
• Mechanical flag indicator standard
• Manual latching lever with color coding for AC or DC coil
• Available without latching lever (or with momentary check button)
• Snap-on marking plate standard
• Cadmium-free contacts - RoHS compliant
• Color coded coils for visual distinction
• Contact rating 6A: 4PDT
10A: DPDT
Relays
E
Contact Material
RU2
RU4
Relays
Specifications
Contact Resistance
Minimum
Applicable Load
Operating Time
Release Time
Maximum
Continuous Applied
Voltage
(AC/DC) at 20°C
Minimum
Operating Voltage
(AC/DC) at 20°C
Drop-Out Voltage
(AC) at 20°C
Drop-Out Voltage
(DC) at 20°C
Power Consumption
AgSnOIn (silver tin oxide
AuAg/Ag (gold-silver alloy
indium)
on silver)
50 m
Ω
maximum
24VDC, 5mA
(reference value)
1V DC, 1mA (standard)
1V DC, 0.1mA (bifurcated)
UL Recognized
File No. E66043, Vol 8, sec. 1
Vol 8, sec. 2
B020813332451
20 msec maximum
20 msec maximum
110%
CSA Certified
File No. LR35144-135844
80%
30%
10%
1.1-1.4VA (AC); 0.9-1.0W (DC)
Between contact and coil:
Between contact and coil:
2,500VAC, 1 minute
2,500VAC, 1 minute
Between poles:
Between poles:
2,500VAC, 1 minute
2,000VAC, 1 minute
Dielectric Strength
Between contacts of the
Between contacts of the
same pole:
same pole:
1,000VAC, 1 minute
1,000VAC, 1 minute
1,800 operations/hr
Frequency Response
Operating extremes:
10 to 55Hz,
Amplitude 1.0 mm p-p
Vibration Resistance
Damage limits: 10 to 55Hz,
Amplitude 1.0 mm p-p
Operating extremes:
150 m/s
2
(15G)
Shock Resistance
Damage limits:
1,000 m/s
2
(100G)
Mechanical:
AC: 20,000,000 operations
minimum
DC: 30,000,000 operations
Life Expectancy
minimum
Electrical:
see electrical life curve
IP40
Degree of Protection
-55 to +70°C (no freezing)
Operating Temperature
35g
Weight
Ordering Information
Consult factory for other voltages.
Basic Part No.
Coil Voltage:
RU 4
# of Contacts
2 = DPDT
4 = 4PDT
42 = 4PDT bifurcated
contacts
S – ( ) – D12
Option*
(Blank) = with latching check
button
C = without check button
M = momentary check button
D = surge suppression diode (DC coils only)
Coil Voltage Code**
D12 = 12V DC
D24 = 24V DC
D110 = 110V DC
A24 = 24V AC
A110 = 110-120V AC
A220 = 220-240V AC
1. *All come with bi-polar LED, mechanical flag indica-
tor, marking plate.
2. **Contact IDEC for other voltages.
E-8
www.idec.com
USA: (800) 262-IDEC or (408) 747-0550, Canada: (888) 317-IDEC
Relays
Part Numbers
Part Numbers: RU Series with Options
Termination
Standard
Bifurcated
RU Series
Contact
Configuration
DPDT
4PDT
4PDT
Standard
RU2S
RU4S
RU42S
Without
Latching Lever
RU2S-C
RU4S-C
RU42S-C
With Momentary
Check Button
RU2S-M
RU4S-M
RU42S-M
With Diode*
RU2S-D
RU4S-D
RU42S-D
*DC coils only.
S: Solder/plugin
Part Numbers: Sockets
Relays
Spring Clamp
DIN Rail Mount
SU2S-11L
Standard DIN
Rail Mount
SM2S-05
Finger-Safe DIN
Rail Mount
SM2S-05C
Panel Mount PC Mount
Springs & Clips (optional)
Part Number
SFA-101①
SFA-202
➁
SY4S-02F1
➂
SFA-301①
SFA-302
➁
SY4S-51F1
➂
Use With
use with SY4S-05, -05C
SM2S-05, -05C
SU4S-11L, SU2S-11L
use with SY4S-51, -61
RU2S
SY4S-51
RU4S
SU4S-11L
SY4S-05
SY4S-05C
SY4S-61
SY4S-62
E
Relays
See Section F for details on sockets. All DIN rail mount
sockets shown above can be mounted using DIN rail BNDN1000.
①
Top latch
➁
Side latch
➂
Pullover spring
Part Numbers: Marking Strip
Item
Part Number
RU Marking Strip
RU9Z-P①PN10,
Quantity
10 pieces per package
Marking Strip Color Code
Color
Code
Color Code
Yellow*
Green
Amber
Y
G
A
Blue
White
S
W
*yellow marking
strip standard on
all RU relays.
In place of
①,
insert color code
from chart at right.
Ratings
Coil Ratings
Rated Voltage Voltage Code
24V
AC
110-120V
220-240V
12V
DC
24V
110V
A24
A110
A220
D12
D24
D110
Coil Tape
Colors
white
dark blue
red
yellow*
green
yellow*
Rated Current ±15%
at 20°C
37.5mA
8.4mA
4.2mA
83.3mA
41.7mA
9.1mA
Coil Resistance
±10% at 20°C
164
Ω
4,550
Ω
18,230Ω
160
Ω
605
Ω
12, 100
Ω
Inrush
Current
60mA
14mA
7mA
Inductance
Energizing
1.8H
36H
144H
De-Energizing
0.96H
22H
87H
N/A
*Voltage printed in black.
Contact Ratings (Standard)
Voltage
Resistive
30V DC
DPDT
4PDT
DPDT
4PDT
DPDT
4PDT
DPDT
4PDT
10A
6A
0.6A
0.4A
10A
6A
10A
6A
Inductive
5A
3A
0.3A
0.2A
5A
3A
5A
3A
Contact Ratings (Bifurcated)
Voltage
Resistive
30V DC
110V DC
120V DC
250V DC
4PDT
4PDT
4PDT
4PDT
3A
–
3A
3A
Inductive
1.5A
–
0.8A
0.8A
110V DC
120V AC
240V AC
www.idec.com
USA: (800) 262-IDEC or (408) 747-0550, Canada: (888) 317-IDEC
E-9
RU Series
Internal Circuit*
Relays
RU2S-D with Diode
(1)12
(4)42
(5)14
(9)11
(8)44
(12)41
RU2S Standard
(1)12
(4)42
(5)14
(9)11
(8)44
(12)41
RU4S/RU42S Standard
(1)12 (2)22
(3)32 (4)42
(5)14 (6)24
(7)34 (8)44
RU4S-D/RU42S-D with Diode
(1)12 (2)22
(3)32 (4)42
(5)14 (6)24
(7)34 (8)44
(9)11 (10)21 (11)31 (12)41
(9)11 (10)21 (11)31 (12)41
(13)A1
(14)A2
(13)A1
(14)A2
(13)A1
(14)A2
(13)A1
(14)A2
Over 24V AC/DC
(1)12
(4)42
Over 24V DC
(1)12
(4)42
Over 24V AC/DC
(1)12 (2)22
(3)32 (4)42
Over 24V DC
(1)12 (2)22
(3)32 (4)42
(5)14
(9)11
(8)44
(12)41
(5)14
(9)11
(8)44
(12)41
(5)14 (6)24
(7)34 (8)44
(5)14 (6)24
(7)34 (8)44
(9)11 (10)21 (11)31 (12)41
(9)11 (10)21 (11)31 (12)41
(13)A1
(14)A2
(13)A1
(14)A2
(13)A1
(14)A2
(13)A1
(14)A2
24V AC/DC or less
24V DC or less
24V AC/DC or less
24V DC or less
Image as viewed from bottom of relay. Refer to socket for exact
wiring layout (Section F)
.
Numbers not in parenthesis follow international system
of labeling terminals.
E
Relays
Electrical Life Curves
RU2 (Resistive Load)
AC250V
DC30V
DC110V
RU4 (Resistive Load)
AC250V
DC30V
DC110V
RU42 (Resistive Load)
AC250V
DC30V
DC110V
1000
500
(x 10,000 operations)
1000
500
(x 10,000 operations)
(x 10,000 operations)
500
100
50
100
50
100
50
10
10
10
1
0.1
0.5 1
5 10
1
1
0.1
0.5 1
3 6
Load Current (A)
0.02
0.1
0.5 1
3 6
Load Current (A)
Load Current (A)
RU2 (Inductive Load)
AC250V DC30V
DC110V
RU4 (Inductive Load)
AC250V
DC30V
DC110V
RU42 (Inductive Load)
AC250V
DC30V
DC110V
1000
500
(x 10,000 operations)
1000
500
(x 10,000 operations)
(x 10,000 operations)
500
100
50
100
50
100
50
10
AC COS =0.3
DC L/R=7ms
10
AC COS =0.3
DC L/R=7ms
10
AC COS =0.3
DC L/R=7ms
1
1
1
0.1
0.5 1
3
6
Load Current (A)
0.1
0.5 1
5 10
0.02
0.1
0.5 1
3 6
Load Current (A)
Load Current (A)
E-10
www.idec.com
USA: (800) 262-IDEC or (408) 747-0550, Canada: (888) 317-IDEC
Relays
Dimensions are in mm.
RU Series
Maximum Switching Capacity
RU2 (Maximum Load)
AC resistive
AC inductive
(cos ø = 0.3)
10
5
Load Current (A)
DC resistive
1
0.1
DC inductive
L/R = 7 ms
10
30
100 250 500
Load Voltage(V)
RU4 (Maximum Load)
AC
resistive
AC
inductive
RU42 (Maximum Load)
AC
resistive
AC
inductive
(cos ø = 0.3)
(cos ø = 0.3)
6
E
Relays
Load Current (A)
Load Current (A)
6
3
1
DC
resistive
0.1
DC
inductive
3
1
DC
resistive
DC
inductive
L/R = 7 ms
L/R = 7 ms
0.1
10
30
100 250 500
10
30
100 250 500
Load Voltage(V)
Load Voltage(V)
Dimensions & Mounting Hole Layouts
RU2
Dimensions
RU4/RU42
Dimensions
35.0
35.0
Marking Plate
Removal Slot
Marking Plate
Removal Slot
6.4
0.5
14
12
4
8
2.6
4
1.2 ◊ 2.2 Hole
21.0
1.2 ◊ 2.2 Hole
21.0
10
2
6
11
3
7
13
1
5
9
27.5
27.5
Marking plate removal slot is provided only on one side.
Insert a flat screwdriver into the slot to remove the marking plate.
Marking plate removal slot is provided only on one side.
Insert a flat screwdriver into the slot to remove the marking plate.
13
1
5
9
14
12
8
6.4
0.5
2.6
Dimensions are in mm.
www.idec.com
USA: (800) 262-IDEC or (408) 747-0550, Canada: (888) 317-IDEC
E-11
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