ABB CM-MSS.12S Thermistor Motor Protection Relay - 24 V AC/DC
Part Number: 1SVR740700R2100
Quick Summary
ABB CM-MSS.12S is a thermistor motor protection relay that safeguards small- to mid-size motors used in conveyors, pumps, and machine tools within automated production lines. Sudden motor overheating leads to unplanned downtime, reduced throughput, and costly repairs; CM-MSS.12S detects rising temps with a dedicated sensor circuit to stop damage early. CE, UKCA, UL/CSA, and other approvals help you meet global electrical safety and product documentation requirements, while IP50 housing supports rugged panel installations. Designed for DIN-rail mounting with screw terminals, it integrates easily into OEM and retrofit projects, delivering reliable protection and reduced maintenance. This combination of protection and ease of installation translates into higher machine uptime and lower lifecycle costs for your automation investments.
Product Information
Extended Description
1SVR740700R2100 ABB: The CM-MSS.13P belongs to the CM-MSS thermistor motor protection relay range. It operates with a rated control supply voltage of 110-130 V AC and 220-240 V AC and has a 1 c/o (SPDT) output with contacts rated at 250 V / 4 A. It features one sensor circuit to monitor PTC temperature sensors and works according to the closed-circuit principle. The relay will be reset automatically after the failure has been removed. A sealable transparent cover for protection against unauthorized changes is available as accessory. The device offers maintenance free Easy Connect Technology with push-in terminals.
EAN
4013614496592
Minimum Order Quantity
1 piece
Customs Tariff Number
85364900
Data Sheet, Technical Information
Data sheet - CM-MSS.12S/P and CM-MSS.13S/P with screw or push-in terminals
Instructions and Manuals
Instruction Sheet / Manual - CM-MSS Thermistor motor protection relays | Installation instructions - CM-MSS Thermistor motor protection relays
CAD Dimensional Drawing
Information - 2D and 3D files for CAD systems
Product Net Width
22.5 mm
Product Net Height
85.6 mm
Product Net Depth / Length
103.7 mm
Product Net Weight
0.147 kg
Function
1 sensor circuit | Auto reset
Rated Control Supply Voltage (Us)
110 ... 130 V AC | 220 ... 240 V AC
Rated Operational Voltage
Auxiliary Circuit 250 V AC
Rated Frequency (f)
Supply Circuit 50/60 Hz
Output
1 c/o (SPDT) contact
Terminal Type
Screwless Terminals
Rated Operational Current AC-12 (Ie)
(230 V) 4 A
Rated Operational Current AC-15 (Ie)
(230 V) 3 A
Rated Operational Current DC-12 (Ie)
(24 V) 4 A
Rated Operational Current DC-13 (Ie)
(24 V) 2 A
Minimum Switching Capacity
24 V | 10 mA
Rated Impulse Withstand Voltage (Uimp)
Output Circuit 1 / Output Circuit 2 4 kV | Output Circuit 4 kV
Rated Insulation Voltage (Ui)
Measuring Circuit / Output Circuit 300 V | Output Circuit 1 / Output Circuit 2 300 V | Supply Circuit / Measuring Circuit 300 V | Supply Circuit / Output Circuit 300 V
Degree of Protection
Housing IP50 | Terminals IP20
Overvoltage Category
III
Pollution Degree
3
Short-Circuit Protective Devices
Output Circuit NC - F Type Fuses 6 A | Output Circuit NO - F Type Fuses 10 A
Electrical Durability
AC-12 100000 cycle
Mechanical Durability
Nr. Operations 30000000 cycle
Connecting Capacity
Flexible 2x 0.5 ... 1.5 mm² | Rigid 2x 0.5 ... 1.5 mm²
Tightening Torque
Auxiliary Circuit 1 ... 1.2 N·m | Main Circuit 2.5 ... 2.7 N·m
Wire Stripping Length
8 mm | Auxiliary Circuit 9 mm | Main Circuit 12 mm
Mounting Position
1 ... 6
Mounting on DIN Rail
TH35-15 (35 x 15 mm Mounting Rail) acc. to IEC 60715 | TH35-7.5 (35 x 7.5 mm Mounting Rail) acc. to IEC 60715
Standards
CAN/CSA C22.2 No.14 | IEC/EN 63000 | IEC/EN 60947-5-1 | IEC/EN 60947-8 | UL 508
Maximum Operating Voltage UL/CSA
Output Circuit 300 V AC
Contact Rating UL/CSA
(NC:) Q600 | (NO:) Q600 | (NC:) B600 | (NO:) D300 | B300
Connecting Capacity UL/CSA
Flexible 2x 18-16 AWG | Rigid 2x 20-16 AWG
Connecting Capacity Main Circuit UL/CSA
Flexible 1/2x 18-10 AWG
Connecting Capacity Auxiliary Circuit UL/CSA
Flexible 1/2x 18-12 AWG
Pilot Duty UL/CSA
B300 | NC B600 | NC Q600 | NO D300 | NO Q600
Flammability According to UL94
V-0
Ambient Air Temperature
Operation -25 ... +60 °C | Storage -40 ... +85 °C
Maximum Operating Altitude Permissible
Without Derating 2000 m
Conflict Minerals Reporting Template (CMRT)
CMRT - Conflict Minerals Reporting Template
REACH Declaration
REACh Info for Electronic Relays and Controls
RoHS Information
RoHS Declaration of conformity for Electronic Relays and Controls
RoHS Status
Following EU Directive 2011/65/EU and Amendment 2015/863 July 22, 2019
SCIP
38f8a198-1a14-4779-b53a-df33c8088756 Germany (DE)
Simplified SCIP
9bfab677-4ed6-43a0-ab35-b006116ac8f0 Poland (PL) | 6316a0b2-d106-4194-aa9d-bfd99b2e57c5 Italy (IT) | 4b518675-566d-4928-950a-5671480ff608 Germany (DE) | 64ba0bff-cabb-45fc-9382-09ad1a965592 Netherlands (NL) | 1816ec0f-e136-4665-8504-bc0bf78a7e32 Croatia (HR) | 80ce10f6-f681-46c4-b542-0af66d564814 Greece (GR) | 38e86b46-5463-4659-8e28-4a5cde8ade3d Norway (NO) | 99854c0f-0b01-4fc8-ba34-9d1e333decb8 Portugal (PT) | b6e0919e-43e9-4dfd-950b-ec2a97b91b0a France (FR) | d0923066-f426-4914-8e7b-4822fb48478c Sweden (SE) | 876fbccb-e3dd-4a10-92bf-729ae60471ef Hungary (HU) | f8fca71a-ef39-4ebf-bc67-6f8d1fc2d1f2 Belgium (BE) | 171c5c64-2b8b-4f07-88f3-56b686cc6f77 Estonia (EE) | d924a6d2-7b74-4bc1-aced-067158bd82e9 Sweden (SE) | 584b69c8-481f-4310-a17b-907f8d2e1381 Hungary (HU) | c252d4fe-a174-4880-9aad-1a55224d15a7 Spain (ES) | d31a3c39-eaae-4bf5-bc11-f1366db633d4 Bulgaria (BG) | 3d136e20-e230-41f0-bab0-75b546a8203e Belgium (BE) | eff3db09-2a4d-4a06-bbf8-c3bfad4b2d88 Germany (DE) | 95db3e5d-dd12-4e00-96d5-093fa3e0058a France (FR) | e1df7cdb-079c-48bb-8ca7-8343cff89aa4 Poland (PL) | 2100883d-5881-43bf-9481-d56ce1910017 Czech Republic (CZ) | a122c546-4844-44a8-8630-44ae0ca7b638 Germany (DE) | 7839ba58-22ca-4230-9ac5-d8bc4f618b7b Denmark (DK) | 2f0cee45-4c56-4767-8d0d-2d14ecf04268 Poland (PL) | e6e84213-8b7c-43e1-bf32-250dbbad466b Finland (FI) | b778d9a9-4c8e-4f39-9f74-7014c5a43975 Germany (DE)
Toxic Substances Control Act - TSCA
Toxic Substances Control Act (TSCA) declaration for Electronic Relays and Controls
CB Certificate
CB_DK-40837-UL
CCC Certificate
CCC Certificate - Measuring and Monitoring Relays CM-PFS.x, CM-MSS.xxx, CM-MSS, CM-ENS, CM-ENS up/down
CQC Certificate
CQC Certificate, Measuring and Monitoring Relays, CM-PFS.x, CM-PFS, CM-MSS.xyz, CM-ENS, CM-ENS up/down, Made in Germany
cULus Certificate
cULus508_20140912-E140448
Declaration of Conformity - CCC
CCC Declaration of Conformity, Measuring and Monitoring Relays, CM-PFS.x, CM-PFS, CM-MSS.xyz, CM-ENS, CM-ENS up/down, Made in Germany
Declaration of Conformity - CE
EU Declaration of Conformity - CM-MSS.xxx thermistor motor protection relay
Declaration of Conformity - UKCA
UK Declaration of conformity - CM-MSS.xxx thermistor motor protection relay
DNV GL Certificate
DNV GL Certificate Thermistor motor protection relays
Package Level 1 Units
box 1 piece
Package Level 1 Width
97 mm
Package Level 1 Depth / Length
30 mm
Package Level 1 Height
109 mm
Package Level 1 Gross Weight
0.171 kg
Package Level 1 EAN
4013614496592
Object Classification Code
B
ETIM 7
EC002568 - Relay for thermistor protection (PTC)
ETIM 8
EC002568 - Relay for thermistor protection (PTC)
ETIM 9
EC002568 - Relay for thermistor protection (PTC)
eClass
V11.0 : 27371503
UNSPSC
39122331
E-Number (Finland)
2712396
E-Number (Norway)
4188165
E-Number (Sweden)
3860715
Feature: 24 V AC/DC control voltage and a single SPDT output. Business Impact: Enables flexible interfacing with drive controllers and reliable switching, reducing wiring errors and panel footprint. Application: Ideal for 230 V motor circuits and 24 V control networks in conveyors, pumps, and machine tools. Feature: One sensor circuit for monitoring PTC temperature sensors with auto reset. Business Impact: Early fault detection minimizes overheating risk and unplanned downtime; auto reset speeds recovery after a fault. Application: Thermistor-based motor protection in OEM drives and retrofit projects. Feature: Auto reset with sealable cover accessory. Business Impact: Improves maintenance efficiency and prevents tampering of protection settings. Application: Control panels in automation lines requiring secure, automatic fault recovery. Feature: Screw terminals and versatile conductor connections (0.5–4 mm² rigid, 0.5–2.5 mm² flexible). Business Impact: Simplifies wiring, reduces installation time, and supports mixed wiring schemes. Application: Installation in compact control boxes on DIN rails. Feature: Compact DIN rail mounting (TH35-15 or TH35-7.5), 22.5 mm width, IP50 housing. Business Impact: Enables dense panel layouts and rugged operation in industrial environments. Application: OEMs delivering space-efficient motor protection relays in automated lines.
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FAQs
The CM-MSS.12S is designed for TH35-15 or TH35-7.5 DIN rails. Mount it securely, connect the screw terminals with conductors 0.5–4 mm² (rigid) or 0.5–2.5 mm² (flexible), and tighten to 0.6–0.8 N·m. Ensure the ambient temperature and panel clearance meet installation specs for reliable operation.
Control supply voltage is 24 V AC/DC. Output is 1 c/o SPDT with ratings up to 4 A at 230 V AC (and 3 A for AC-15). The device also supports a 250 V auxiliary circuit and operates at 50/60 Hz, enabling straightforward integration with standard motor controllers.
CM-MSS.12S monitors motor temperature via a PTC sensor circuit. If a fault is detected, the relay opens the circuit to protect the motor and automatically resets once the fault condition is cleared, reducing manual intervention and downtime in demanding automation environments.
The device carries CE and UKCA declarations, UL/CSA approvals, and compliance with IEC/EN 60947-5-1 and 60947-8. Additional certifications and declarations ensure global eligibility and safe integration into multinational automation projects.
Ideal for conveyors, pumps, and machine tools where motor protection and quick fault recovery are critical. Its compact DIN-rail form factor, robust IP50 housing, and screw-terminal connectivity support OEM builds and retrofits, delivering lowered maintenance costs and improved equipment uptime in continuous production lines.