RM4UB35
Product ID:33279
Updated: 2026/4/3
Key Features
- 1Detect overvoltage and undervoltage with self-powered precision. 2、Adjust time delay from 0.1 to 10 seconds for control. 3、Handle robust loads with 8A at 250V AC switching. 4、Meet European standards with full CE compliance. 5、Receive added security from an 18-month warranty.
Technical Specifications
Detailed engineering parameters
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Range of Product | Zelio Control | Product or Component Type | Industrial measurement and control relays |
| Relay Type | Voltage control relay | Relay name | RM4U |
| Relay monitored parameters | Self-powered<br />Overvoltage and undervoltage detection | Time delay range | 0.1...10 s adjustable |
| Minimum switching current | 10 mA 12 V | Maximum switching current | 8 A 250 V AC |
| Electrical connection | 2 conductors cable 0.002 in² (1.5 mm²) flexible with cable end IEC 60947-1<br />2 conductors cable 0.004 in² (2.5 mm²) flexible without cable end IEC 60947-1 | Contacts type and composition | 2 C/O |
| Poles description | 1P | Maximum switching voltage | 440 V AC |
| [Us] rated supply voltage | 160...300 V AC | Supply voltage limits | 160…300 V AC |
| Control threshold undervoltage | 160…220 V 50/60 Hz | Control threshold overvoltage | 220...300 V |
| Output contacts | 2 C/O | Maximum measuring cycle | 80 ms |
| Setting accuracy of the switching threshold | +/-3 % | Switching threshold drift | <= 0.06 % per degree centigrade depending permissible ambient air temperature<br /><= 0.5 % within the measuring range |
| Setting accuracy of time delay | 10 P | Time delay drift | <= 0.07 % per degree centigrade depending on the rated operational temperature<br /><= 0.5 % within the measuring range |
| Hysteresis | 5 % fixed de-energisation threshold | [Ue] rated operational voltage | >= 160 V |
| Maximum permissible voltage | <= 300 V L1 and L3 | Marking | CE : LVD 73/23/EEC<br />CE : EMC 89/336/EEC |
| Overvoltage category | III IEC 60664-1 | Insulation resistance | > 500 MOhm 500 V DC IEC 60255-5 |
| [Ui] rated insulation voltage | 500 V IEC | Control circuit voltage limits | 0.85...1.1 Uc |
| Supply frequency | 50/60 Hz +/- 5 % | Supply disconnection value | > 0.1 Uc |
| Operating position | Any position without derating | 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 |
| [Ie] rated operational current | 2 A 158 °F (70 °C) 24 V DC-13 IEC 60947-5-1<br />2 A 158 °F (70 °C) 24 V DC-13 VDE 0660<br />3 A 158 °F (70 °C) 115 V AC-15 IEC 60947-5-1<br />3 A 158 °F (70 °C) 115 V AC-15 VDE 0660<br />3 A 158 °F (70 °C) 24 V AC-15 IEC 60947-5-1<br />3 A 158 °F (70 °C) 24 V AC-15 VDE 0660<br />3 A 158 °F (70 °C) 250 V AC-15 IEC 60947-5-1<br />3 A 158 °F (70 °C) 250 V AC-15 VDE 0660<br />0.1 A 158 °F (70 °C) 250 V DC-13 VDE 0660<br />0.3 A 158 °F (70 °C) 115 V DC-13 IEC 60947-5-1<br />0.3 A 158 °F (70 °C) 115 V DC-13 VDE 0660 | Switching voltage | 250 V AC |
| Contacts material | 90/10 silver nickel contacts | Number of cables | 2 |
| Height | 3.07 in (78 mm) | Width | 0.9 in (22.5 mm) |
| Depth | 3.1 in (80 mm) | Terminals description ISO n°1 | (15-16-18)OC |
| Output relay state | Tripped, fault present | 9 mm pitches | 2.5 |
| Net Weight | 0.24 lb(US) (0.11 kg) | Standards | EN/IEC 60255-6 |
| Product Certifications | UL<br />GL<br />CSA | Ambient Air Temperature for Storage | -40…185 °F (-40…85 °C) |
| Ambient Air Temperature for Operation | -4…149 °F (-20…65 °C) | Relative humidity | 15…85 % 3K3 IEC 60721-3-3 |
| Vibration resistance | 0.35 mm 10…55 Hz)IEC 60068-2-6 | Shock resistance | 15 gn 11 ms IEC 60068-2-27 |
| IP degree of protection | IP20 IEC 60529 terminals)<br />IP50 IEC 60529 casing) | Pollution degree | 3 IEC 60664-1 |
| Dielectric test voltage | 2.5 kV | Non-dissipating shock wave | 4.8 kV |
| Resistance to electrostatic discharge | 6 kV contact IEC 61000-4-2 level 3<br />8 kV air IEC 61000-4-2 level 3 | Resistance to electromagnetic fields | 9.1 V/m (10 V/m) IEC 61000-4-3 level 3 |
| Resistance to fast transients | 2 kV IEC 61000-4-4 level 3 | Protection against electric shocks | 2 kV IEC 61000-4-5 level 3 |
| Disturbance radiated/conducted | CISPR 22 - class A<br />CISPR 11 group 1 - class A |
Specifications may be subject to change without notice