ABB CM-SFS.21P Current Monitoring Relay - UL 508 CE Certified
Part Number: 1SVR740760R0400
Quick Summary
CM-SFS.21P current monitoring relay protects single-phase circuits by window monitoring in automation panels. This addresses nuisance trips and undetected overcurrents that disrupt production and shorten equipment life. Key certifications such as UL/CSA, CE, and UKCA help ensure global compliance in diverse environments while maintaining safety standards. With a 24-240 VAC/DC supply and flexible output configurations, it integrates smoothly into existing control architectures. The solution leverages Easy Connect technology and DIN rail mounting for fast, reliable installation, making it a practical choice for modern automation cabinets and Panel building projects.
Product Information
Extended Description
1SVR740760R0400 ABB: The CM-SFS.21P is a single-functional current monitoring relay from the CM single-phase monitors range. This monitoring relay operates with a rated control supply voltage of 24 - 240 V AC / DC and has a 2 c/o (SPDT) output with contacts rated at 250 V / 4 A. It provides a RMS measuring principle for DC and AC currents with 3 measuring ranges: 3-30 mA, 10-100 mA and 0.1-1 A. The CM-SFS.21P offers window (over- and undercurrent) monitoring as well as selection of ON- or OFF-delay, open- or closed-circuit operating principle, with or without latching function. The output contacts can be configured as 1x2 c/o (SPDT) (common signal) or 2x1 c/o (SPDT) (separate signal for minimum and maximum thresholds) operation. The hysteresis is fixed at 5 % of the threshold value. The tripping delay and the start-up delay are adjustable over a range of instantaneous to 30 s (0, 0.1-30 s). 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.
Country of Origin
Germany (DE)
Lead Time
0 day
Made To Order
No
Warranty Return
Product under warranty must be returned
Product Sales Status
Active
Quote Only
No
Stocked At Warehouses
AETAD009EXPU
Country of Origin
Germany (DE)
Lead Time
0 day
Made To Order
No
Warranty Return
Product under warranty must be returned
Product Sales Status
Active
Quote Only
No
Stocked At Warehouses
BRABB008EXPU
Country of Origin
Germany (DE)
Lead Time
0 day
Made To Order
No
Warranty Return
Product under warranty must be returned
Product Sales Status
Active
Quote Only
No
Stocked At Warehouses
CHSEC006EXPU
Lead Time
160 day
Warranty Return
Product under warranty must be returned
Stocked At Warehouses
CZABB004EXPU
Country of Origin
Germany (DE)
Made To Order
No
Product Sales Status
Active
Quote Only
No
EAN
4016779852371
Minimum Order Quantity
1 piece
Customs Tariff Number
85364900
Data Sheet, Technical Information
Data sheet - CM-SFS.2P; CM-SFS.2S Current window monitoring relay, single-phase AC/DC
Instructions and Manuals
Instruction Sheet / Manual - CM-SxS Single-phase current monitoring relays | Installation instructions - CM-SxS Single-phase current monitoring 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
0.139 kg
Function
Over- and undercurrent monitoring
Measuring Range
3 ... 30 mA | 10 ... 100 mA | 0.1 ... 1 A
Time Range
0 s or 0.1 ... 30 s start-up delay | 0 s or 0.1 ... 30 s tripping delay (ON or OFF)
Rated Control Supply Voltage (Us)
24 ... 240 V AC/DC
Output
2 x 1 c/o or 1 x 2 c/o contacts; operating principle selectable
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)
Measuring Circuit / Output Circuit 6 kV | Output Circuit 1 / Output Circuit 2 4 kV | Supply Circuit / Measuring Circuit 6 kV | Supply Circuit / Output Circuit 4 kV
Rated Insulation Voltage (Ui)
Measuring Circuit / Output Circuit 600 V | Output Circuit 1 / Output Circuit 2 250 V | Supply Circuit / Measuring Circuit 600 V | Supply Circuit / Output Circuit 250 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 with Ferrule 2x 0.5 ... 1.5 mm² | Flexible with Insulated Ferrule 2x 0.5 ... 1.5 mm² | Flexible 2x 0.5 ... 1.5 mm² | Rigid 2x 0.5 ... 1.5 mm²
Wire Stripping Length
8 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 60255-27 | IEC/EN 61000-6-2 | IEC/EN 61000-6-3 | UL 508
Maximum Operating Voltage UL/CSA
Output Circuit 300 V AC
Contact Rating UL/CSA
B300
Connecting Capacity UL/CSA
Flexible 2x 18-16 AWG | Rigid 2x 20-16 AWG
Pilot Duty UL/CSA
B300
Ambient Air Temperature
Operation -20 ... +60 °C | Storage -40 ... +85 °C
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
Toxic Substances Control Act - TSCA
Toxic Substances Control Act (TSCA) declaration for Electronic Relays and Controls
CB Certificate
CB_DK-28255-UL
CQC Certificate
CQC Certificate, Relays, CM-SRS.., CM-SFS.., CM-ESS..,CM-EFS.., CM-TCS.., Made in Germany
cULus Certificate
cULus508_20120203-E140448
Declaration of Conformity - CCC
CCC Certificate, Relays, CM-SRS.., CM-SFS.., CM-ESS..,CM-EFS.., CM-TCS.., Made in Germany
Declaration of Conformity - CE
EU Declaration of Conformity - CM-ExS.xxx, CM-SxS.xxx Single-phase current and voltage monitoring relays
Declaration of Conformity - UKCA
UK Declaration of Conformity - CM-ExS.xxx, CM-SxS.xxx Single-phase current and voltage monitoring relays
DNV GL Certificate
DNV Certificate - Current monitoring relays CM-SFS.x and CM-SRS.x with screw or push-in terminals
EAC Certificate
EAC Certificate - Measuring and monitoring relays CM-xxS.xxx and CM-xxN.xxx range in the new housing
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
0.162 kg
Package Level 1 EAN
4016779852371
Object Classification Code
B
ETIM 7
EC001440 - Current monitoring relay
ETIM 8
EC001440 - Current monitoring relay
ETIM 9
EC001440 - Current monitoring relay
eClass
V11.0 : 27371802
UNSPSC
39122332
E-Number (Finland)
2712297
E-Number (Norway)
4188075
E-Number (Sweden)
3860640
Feature → Business Impact → Application: The CM-SFS.21P provides 2 c/o (SPDT) outputs or 1x2 c/o configuration, enabling precise signaling for minimum and maximum current thresholds, which reduces mis-trips and improves process reliability in motor control and lighting circuits. This translates to lower downtime and easier fault isolation in manufacturing lines and building automation projects. Application-wise, it is well-suited for single-phase loads up to 230 V AC, with configurable ON- or OFF-delay (0 s to 30 s) and optional latching, ideal for applications requiring defined hysteresis and stable control signals. Feature → Measured ranges (3-30 mA, 10-100 mA, 0.1-1 A) → Business Impact → Application: These ranges cover small to moderate loads, enabling precise monitoring of current windows to protect motors and feeders without nuisance trips in HVAC, pumps, and conveyor systems. Feature → 24-240 V AC/DC supply → Business Impact → Application: Universal supply compatibility simplifies retrofits and greenfield installs, reducing stocking complexity in electrical cabinets and warehouses. Feature → Easy Connect push-in terminals → Business Impact → Application: Fast, vibration-tolerant connections minimize wiring time and maintenance in harsh plant environments. Feature → DIN rail mounting (TH35) and compact footprint → Business Impact → Application: Space-efficient installations in crowded panels with straightforward integration into existing automation architectures.
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FAQs
Install on a TH35 DIN rail (TH35-15 or TH35-7.5) with Easy Connect push-in terminals. Connect 24-240 V AC/DC supply, wire the 2 x SPDT outputs for the chosen configuration (1x 2 c/o or 2x 1 c/o), and set the desired start-up and tripping delays (0 s to 30 s). Ensure proper clearance and secure mounting for vibration-prone environments; use the optional sealable cover for protection against tampering.
The CM-SFS.21P measures currents in three ranges: 3-30 mA, 10-100 mA, and 0.1-1 A with a fixed 5% hysteresis. It supports window monitoring (over- and undercurrent) and allows configuring ON- or OFF-delay. The device can operate with a 24-240 V AC/DC control supply and provides two SPDT outputs for flexible signaling.
Yes. The relay is designed for single-phase circuits typical in motor control and general automation. Its window monitoring capability, adjustable delays, and dual SPDT outputs support motor start/stop signaling, fault signaling, and safe shutdown logic. It’s compatible with DIN rail mounting and offers robust operation in cabinets with 230 V loads and standard control circuits.
The CM-SFS.21P carries CE and UKCA marks, UL/CSA compliance (UL 508 and cULus), and multiple declarations including CB and CCC certificates. It adheres to IEC/EN 63000, IEC/EN 60255-27, and related UL/CSA safety requirements, ensuring suitability for global panel and automation environments.
The device is maintenance-free aside from routine inspection, with push-in terminals and a sealable cover to prevent unauthorized changes. Its configurable delays and latching options reduce nuisance trips, lowering downtime and extending equipment life. Quick installation and DIN rail compatibility also minimize labor costs during commissioning and future panel expansions.