The RM4U voltage measurement relay from Schneider Electric is designed for industrial measurement and control, offering precise voltage measurement capabilities.
Product ModelRM4UA01B
Product ID33719
Stock on Request
Last updated: 8/29/2026
Key Features
1
FeaturePrecise voltage measurement for industrial applications
2
FeatureOvervoltage or undervoltage detection for reliable operation
3
FeatureCompact design for easy integration into control systems
4
FeatureHigh accuracy and reliability in a robust package
5
FeatureSuitable for a wide range of AC voltage measurements
Technical Specifications
Detailed engineering parameters based on manufacturer documentation
Specifications may be subject to change without notice
Parameter
Value
Parameter
Value
Range of Product
Harmony Relay
Relay Type
Voltage measurement relay
Product or Component Type
Industrial measurement and control relays
Relay name
RM4U
Relay monitored parameters
Overvoltage or undervoltage detection
time delay
Without
Contacts type and composition
1 C/O
Maximum switching voltage
440 V AC
operating voltage tolerance
0.85...1.1 Uc
Power consumption in VA
2 VA AC
Output contacts
1 C/O
Hysteresis
5...30 % adjustable voltage threshold setting
Internal input resistance
43000 Ohm6600 Ohm71000 Ohm
Permissible continuous overload
80 V20 V60 V
Permissible non repetitive overload
100 A <= 1 s25 A <= 1 s80 A <= 1 s
Switching threshold drift
<= 0.06 % per degree centigrade depending permissible ambient air temperature<= 0.5 % within the supply voltage range (0.85...1.1 Un)
Setting accuracy of time delay
10 P
Quality labels
CE
Setting accuracy of the switching threshold
+/-5 %
Operating position
Any position without derating
Overvoltage category
III IEC 60664-1
[Ui] rated insulation voltage
500 V IEC
Supply disconnection value
> 0.1 Uc
Connections - terminals
Screw terminals, 2 x 1.5 mm²flexible with cable endScrew terminals, 2 x 2.5 mm²flexible without cable end
[Ie] rated operational current
2 A 158 °F (70 °C) 24 V DC-13 IEC 60947-5-1/19912 A 158 °F (70 °C) 24 V DC-13 VDE 06603 A 158 °F (70 °C) 115 V AC-15 IEC 60947-5-1/19913 A 158 °F (70 °C) 115 V AC-15 VDE 06603 A 158 °F (70 °C) 24 V AC-15 IEC 60947-5-1/19913 A 158 °F (70 °C) 24 V AC-15 VDE 06603 A 158 °F (70 °C) 250 V AC-15 IEC 60947-5-1/19913 A 158 °F (70 °C) 250 V AC-15 VDE 06600.1 A 158 °F (70 °C) 250 V DC-13 IEC 60947-5-1/19910.1 A 158 °F (70 °C) 250 V DC-13 VDE 06600.3 A 158 °F (70 °C) 115 V DC-13 IEC 60947-5-1/19910.3 A 158 °F (70 °C) 115 V DC-13 VDE 0660
Tightening torque
5.3...9.7 lbf.in (0.6...1.1 N.m)
Mechanical durability
30000000 cycles
[Ith] conventional free air thermal current
8 A
Switching capacity in mA
10 mA 12 V
Contacts material
90/10 silver nickel contacts
Number of cables
2
Width
0.9 in (22.5 mm)
Height
3.07 in (78 mm)
Depth
3.1 in (80 mm)
Terminals description ISO n°1
(A1-A2)CO(C-B1-B2-B3)CO(15-16-18)OC
Output relay state
Tripped if A measured > A set
9 mm pitches
2.5
Net Weight
0.370 lb(US) (0.168 kg)
Electromagnetic compatibility
Electrostatic discharge - test level: 6 kV level 3 (contact discharge) conforming to IEC 61000-4-2Electrostatic discharge - test level: 8 kV level 3 (air discharge) conforming to IEC 61000-4-2
Ambient air temperature for operation
-4...149 °F (-20...65 °C)
Vibration resistance
0.35 ms 10...55 Hz)IEC 60068-2-6
Shock resistance
15 gn 11 ms IEC 60068-2-27
Standards
EN/IEC 60255-6
Product Certifications
GLULCSA
Ambient Air Temperature for Storage
-40...185 °F (-40...85 °C)
Relative humidity
15...85 % 3K3 IEC 60721-3-3
IP degree of protection
IP20 IEC 60529 terminals)IP50 IEC 60529 casing)
Pollution degree
3 IEC 60664-1
Directives
73/23/EEC - low voltage directive89/336/EEC - electromagnetic compatibility
