RM4JA31F
Product ID:33229
Updated: 2026/4/3
Key Features
- 1Detect currents from 0.3mA to 1A with high sensitivity. 2、Utilize DPDT contact configuration for versatile application use. 3、Set adjustable time delays from 0.05 to 30 seconds. 4、Monitor both overcurrent and undercurrent conditions reliably. 5、Ensure durability with 30 million operating cycle design.
Technical Specifications
Detailed engineering parameters
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Range of Product | Harmony Relay | Relay Type | Current measurement relay |
| Product or Component Type | Industrial measurement and control relays | Relay name | RM4J |
| Relay monitored parameters | Overcurrent or undercurrent detection | time delay | Adjustable 0.05...30 s |
| Maximum power consumption in VA | 3.3 VA AC | Measurement range | 0.3...30 mA current AC 50/60 Hz<br />0.3...30 mA current DC<br />10...100 mA current AC 50/60 Hz<br />10...100 mA current DC<br />100...1000 mA current AC 50/60 Hz<br />100...1000 mA current DC |
| Contacts type and composition | 2 C/O | Maximum switching voltage | 440 V AC |
| operating voltage tolerance | 0.85...1.1 Uc | Output contacts | 2 C/O |
| Maximum measuring cycle | 80 ms | Internal input resistance | 33 Ohm<br />10 Ohm<br />1 Ohm |
| Permissible continuous overload | 1.5 A<br />0.15 A<br />0.05 A | Permissible non repetitive overload | 5 A<br />0.2 A<br />0.5 A |
| Setting accuracy of the switching threshold | +/-5 % | Switching threshold drift | <= 0.06 % per degree centigrade depending permissible ambient air temperature<br /><= 0.5 % within the supply voltage range (0.85...1.1 Un) |
| Setting accuracy of time delay | 10 P | Time delay drift | <= 0.07 % per degree centigrade depending on temperature<br /><= 0.5 % within the supply voltage range (0.85...1.1 Un) |
| Hysteresis | 5…30 % adjustable current threshold setting | marking | CE : LVD 73/23/EEC<br />CE : EMC 89/336/EEC |
| Overvoltage category | III IEC 60664-1 | [Ui] rated insulation voltage | 500 V IEC |
| Supply disconnection value | > 0.1 Uc | Operating position | Any position without derating |
| Connections - terminals | Screw terminals, 2 x 1.5 mm²flexible with cable end<br />Screw terminals, 2 x 2.5 mm²flexible without cable end | 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 24 V DC-13 158 °F (70 °C) IEC 60947-5-1/1991<br />2 A 24 V DC-13 158 °F (70 °C) VDE 0660<br />3 A 115 V AC-15 158 °F (70 °C) IEC 60947-5-1/1991<br />3 A 115 V AC-15 158 °F (70 °C) VDE 0660<br />3 A 24 V AC-15 158 °F (70 °C) IEC 60947-5-1/1991<br />3 A 24 V AC-15 158 °F (70 °C) VDE 0660<br />3 A 250 V AC-15 158 °F (70 °C) IEC 60947-5-1/1991<br />3 A 250 V AC-15 158 °F (70 °C) VDE 0660<br />0.1 A 250 V DC-13 158 °F (70 °C) IEC 60947-5-1/1991<br />0.1 A 250 V DC-13 158 °F (70 °C) VDE 0660<br />0.3 A 115 V DC-13 158 °F (70 °C) IEC 60947-5-1/1991<br />0.3 A 115 V DC-13 158 °F (70 °C) VDE 0660 | Switching capacity in mA | 10 mA 12 V |
| Switching voltage | 250 V AC | Contacts material | 90/10 silver nickel contacts |
| Number of cables | 2 | Width | 0.9 in (23 mm) |
| Height | 3.07 in (78 mm) | Depth | 3.1 in (80 mm) |
| Terminals description ISO n°1 | (25-26-28)OC<br />(C-B1-B2-B3)CO<br />(A1-A2)CO<br />(15-16-18)OC | Output relay state | Tripped if A measured > A set<br />Tripped if V measured > V set |
| 9 mm pitches | 2.5 | Net Weight | 0.379 lb(US) (0.172 kg) |
| Electromagnetic compatibility | Electrostatic discharge - test level: 6 kV level 3 (contact discharge) conforming to IEC 61000-4-2<br />Electrostatic discharge - test level: 8 kV level 3 (air discharge) conforming to IEC 61000-4-2 | Standards | EN/IEC 60255-6 |
| Product Certifications | CSA<br />GL<br />UL | Ambient Air Temperature for Storage | -40…185 °F (-40…85 °C) |
| Ambient air temperature for operation | -4…149 °F (-20…65 °C) | Environmental characteristic | 3K3 |
| Relative humidity | 15…85 % IEC 60721-3-3 | Shock resistance | 15 gn 11 ms IEC 60255-21-1 |
| 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 level 3 IEC 61000-4-5 |
| Disturbance radiated/conducted | CISPR 22 - class A<br />CISPR 11 group 1 - class A |
Specifications may be subject to change without notice