RS Better World
Siemens Monitoring Relay, 3 Phase, DPDT, DIN Rail, 5mA to 5A
- RS Stock No.:
- 149-166
- Mfr. Part No.:
- 3UG5618-1CR20
- Manufacturer:
- Siemens
Subtotal (1 unit)*
SGD698.07
(exc. GST)
SGD760.90
(inc. GST)
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Temporarily out of stock
- 1 unit(s) shipping from 02 July 2026
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Units | Per unit |
|---|---|
| 1 + | SGD698.07 |
*price indicative
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- RS Stock No.:
- 149-166
- Mfr. Part No.:
- 3UG5618-1CR20
- Manufacturer:
- Siemens
Specifications
Technical data sheets
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Siemens | |
| Product Type | Monitoring Relay | |
| Electrical Phase | 3 | |
| Contact Configuration | DPDT | |
| Mount Type | DIN Rail | |
| Minimum Current Sensed | 5mA | |
| Maximum Current Sensed | 5A | |
| Power Consumption | 2W | |
| Terminal Type | Screw | |
| IP Rating | IP20 | |
| Time Delay | 0.1 to 30 s | |
| Minimum Operating Temperature | -25°C | |
| Supply AC Voltage | 120, 690V ac | |
| Relay Contact Current | 3A | |
| Maximum Operating Temperature | 60°C | |
| Series | 3UG5 | |
| Width | 22.5mm | |
| Standards/Approvals | RoHS, EAC, UL, CCC, IEC 60664 | |
| Length | 90mm | |
| Height | 100mm | |
| Better World Product | Yes | |
| Better World Claim | Concentrated or Compact Solution | |
| Select all | ||
|---|---|---|
Brand Siemens | ||
Product Type Monitoring Relay | ||
Electrical Phase 3 | ||
Contact Configuration DPDT | ||
Mount Type DIN Rail | ||
Minimum Current Sensed 5mA | ||
Maximum Current Sensed 5A | ||
Power Consumption 2W | ||
Terminal Type Screw | ||
IP Rating IP20 | ||
Time Delay 0.1 to 30 s | ||
Minimum Operating Temperature -25°C | ||
Supply AC Voltage 120, 690V ac | ||
Relay Contact Current 3A | ||
Maximum Operating Temperature 60°C | ||
Series 3UG5 | ||
Width 22.5mm | ||
Standards/Approvals RoHS, EAC, UL, CCC, IEC 60664 | ||
Length 90mm | ||
Height 100mm | ||
Better World Product Yes | ||
Better World Claim Concentrated or Compact Solution | ||
- COO (Country of Origin):
- DE
Siemens 3UG5 Series Monitoring Relay, 120 to 400V Supply AC Voltage, 0.1 to 30 s Time Delay - 3UG5618-1CR20
This monitoring relay is a Compact DIN-rail device for three-phase line surveillance, providing automatic correction of rotation direction and detection of phase failure, sequence and asymmetry in industrial control systems. It monitors frequency Plus three-phase overvoltage and undervoltage windows and can operate with or without a NEUTRAL conductor, making it suitable for motor protection and network supervision across a wide AC voltage range.
Features & Benefits
• Measures three-phase voltages 90–760 V to protect equipment from supply faults
• Detects overvoltage and undervoltage across three phases for system stability
• Auto-corrects phase sequence to maintain correct motor rotation direction
• Adjustable response and OFF-delay 0.1–30 s to prevent nuisance tripping
• Two changeover contacts provide switching at up to 3A for control circuits
• Galvanic isolation between inputs and outputs to reduce interference risk
• Detects overvoltage and undervoltage across three phases for system stability
• Auto-corrects phase sequence to maintain correct motor rotation direction
• Adjustable response and OFF-delay 0.1–30 s to prevent nuisance tripping
• Two changeover contacts provide switching at up to 3A for control circuits
• Galvanic isolation between inputs and outputs to reduce interference risk
**Applications**
• Suitable for motor protection in conveyor and pump control panels
• Ideal for monitoring incoming supply to distribution boards
• Used for frequency-sensitive equipment protection in production lines
• Can be used for phase-sequence supervision in three-phase inverter systems
• Ideal for monitoring incoming supply to distribution boards
• Used for frequency-sensitive equipment protection in production lines
• Can be used for phase-sequence supervision in three-phase inverter systems
What supply voltage range can the unit monitor for control supply?
It accepts an AC control supply across a broad band from 120 to 690 V at both 50Hz and 60Hz with defined operating range factors.
How does it cope with brief mains interruptions?
The device provides a minimum buffering time of 20ms to ride through short power disturbances before signalling a fault.
What connection types and conductor sizes are supported?
Screw terminals accept solid or stranded conductors from 0.5 to 4 mm² with a stripped length of 10 mm and a recommended tightening torque of 0.6–0.8 N·m.
What mechanical and electrical endurance can be expected from the switching elements?
Typical mechanical life is around 10,000,000 cycles and electrical endurance at AC-15/230 V is about 100,000 operations.
What environmental limits apply during normal operation?
It is rated for operation from −25°C to +60°C, with a maximum installation altitude of 2000m and relative humidity up to 70%.
Related links
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