New Original Siemens 3RN1010-2CM00 Thermistor motor protection relay
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New Original Siemens 3RN1010-2CM00 SIRIUS Thermistor Motor Protection Relay Full English Introduction
1. Product Overview
The 3RN1010-2CM00 is an original Siemens SIRIUS series compact thermistor motor protection relay, designed for real-time winding temperature monitoring and overheat protection of three-phase industrial motors equipped with Type A PTC thermistor sensors embedded inside motor windings. It operates on closed-circuit monitoring principle and supports automatic reset mode, adopting standard DIN rail mounting structure with 22.5mm slim housing width.
This relay provides comprehensive fault detection including PTC sensor wire break, sensor short-circuit and motor over-temperature. It is widely matched with asynchronous motors, servo motors, fan motors, pump motors and compressor motors applied in packaging machinery, textile equipment, HVAC systems, metal processing machines and logistics conveying lines. The product complies with IEC 60947, VDE 0660 standards and ATEX explosion-proof certification, suitable for both general workshop and hazardous gas/dust working environments. New original units feature consistent electrical performance, full RoHS compliance and stable long-term continuous operation.
2. Main Core Functions
- Real-time temperature monitoring of motor windings via built-in PTC thermistor signal evaluation circuit
- Automatic tripping output when PTC resistance exceeds over-temperature threshold to cut motor control circuit
- Automatic reset function after temperature drops back to safe range without manual operation
- Built-in wire break and short-circuit detection for PTC sensor wiring to avoid blind monitoring failure
- Dual LED status indicators to display normal ready state and over-temperature tripped state separately
- Integrated test button for on-site quick function verification without heating the actual motor
- 1 changeover contact (1NO + 1NC) for signal feedback or main circuit interlock control
- Galvanic isolation between sensor circuit and control power circuit to prevent signal interference
- Closed-circuit self-monitoring design, triggers alarm when control supply voltage loses power
- Slim DIN rail installation, compatible with standard electrical cabinet internal layout
3. Core Electrical Technical Specifications
Table 1 Main Technical Parameters
表格
| Parameter Item | Specification of 3RN1010-2CM00 |
|---|---|
| Model Code | 3RN1010-2CM00 |
| Product Series | SIRIUS 3RN1 Thermistor Motor Protection Relay |
| Compatible Sensor | Type A PTC thermistor (DIN 44081 standard) |
| Rated Control Supply Voltage Us | 24 V AC/DC |
| Reset Mode | Automatic Reset |
| Output Contact Type | 1 SPDT (1 Normally Open + 1 Normally Closed) |
| Rated Contact Current | 5 A (AC-15, 230 V) |
| PTC Detection Range | 150 Ω (normal) ~ 3000 Ω (trip threshold) |
| Sensor Circuit Fault Detection | Wire break & short-circuit monitoring |
| Status Indicator | 2 LED lights (READY green, TRIPPED red) |
| Housing Width | 22.5 mm |
| Mounting Standard | 35 mm DIN rail mounting |
| Protection Grade | IP20 (front panel, finger-safe touch protection) |
| Operating Ambient Temperature | -20 ℃ ~ +60 ℃ |
| Compliance Standards | IEC 60947-5-1, VDE 0660-303, ATEX, CE, RoHS |
| Mechanical Service Life | 10 million switching cycles |
| Electrical Endurance | 100,000 switching cycles under AC-15 load |
4. Product Dimensions & Weight Data
Table 2 Dimension and Weight Information
表格
| Item | Exact Data |
|---|---|
| Overall Housing Height | 99 mm |
| Overall Housing Depth | 110 mm |
| Housing Width | 22.5 mm |
| Single Unit Net Weight | 0.132 kg |
| Single Original Packing Gross Weight | 0.175 kg |
| Terminal Type | Screw-type wiring terminals |
| Installation Orientation | Horizontal / vertical universal DIN rail mounting |
| Single Package Outer Size | 112 mm × 30 mm × 105 mm |
5. Key Technical Features
- Compact 22.5mm slim body design, greatly saves internal cabinet installation space for multi-relay layout
- High-precision PTC signal evaluation circuit, stable temperature threshold without drift under long-term operation
- Dual LED visual status feedback, maintenance staff can quickly judge motor fault type without measuring tools
- Integrated test button, convenient batch equipment inspection and regular maintenance verification
- Closed-circuit self-checking structure, automatically identifies broken sensor lines to avoid hidden overheating risks
- Galvanic isolation between sensor loop and control power loop, anti-electromagnetic interference for complex industrial cabinet environments
- Standard screw terminals with clear DIN standard labeling, reduce wiring error rate during on-site assembly
- ATEX certified explosion-proof performance, applicable to chemical, mining and other hazardous area motor protection
- Original Siemens industrial-grade plastic housing, anti-aging and dust-resistant for long-term workshop service
- Unified SIRIUS series mechanical dimensions, easy spare parts stock management and model replacement
6. Ten Similar Functional Siemens Thermistor Motor Protection Relay Models (3RN Series)
All listed products belong to Siemens original SIRIUS 3RN series PTC thermistor motor protection relays, supporting motor winding temperature monitoring, sensor line fault detection and DIN rail installation, with different voltage, reset mode and contact configurations for alternative selection:
- 3RN1010-1CB00
- 3RN1010-2BB00
- 3RN1013-1BW01
- 3RN2010-1CA30
- 3RN2010-2CA30
- 3RN2011-1BW30
- 3RN2012-1BA30
- 3RN2013-2GW30
- 3RN1062-1CW00
- 3RN2000-1AW30
WHO WE ARE
About us
Located in Kunshan, China, Atifts Technology Co., Ltd. is a well-known enterprise specializing in electronic components distribution. We specialize in the sales of global brands of industrial automation components, with a wealth of experience in foreign product agents, and many of the world's leading manufacturers such as Keens, Schneider, SMC, ABB, Siemens, and other world-renowned manufacturers to establish a long-term and stable relations of cooperation.
Atifts Technology Co., Ltd. @ 2024
Over the years, we have always adhered to the "pioneering, pragmatic, standardized, innovative" management philosophy, and constantly promote the close integration of products and market demand. We firmly believe that only by constantly exploring new market areas, doing a good job in every detail, standardizing business processes, and continuously innovating products and services can we ensure that our products are more adaptable to market changes and meet the diversified needs of our customers.
Since the founding of the company, we have always adhered to the core concept of "survival by quality", and are committed to providing customers with high-quality electronic components. At the same time, we take specialized R & D manufacturing as the goal, market-oriented development strategy to ensure that our products are always in the forefront of the industry.
With excellent product quality, professional technical service and good market reputation, Kunshan Autofits Technology Co.,Ltd. has won the trust and support of our customers. We look forward to working with more partners hand in hand, to achieve long-term win-win relationship, and jointly promote the prosperity of the electronic components industry.
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