ABB 1SVR730840R0400 Current Monitoring Relay - CE
Part Number: 1SVR730840R0400
Quick Summary
Current Monitoring Relay ABB 1SVR730840R0400 is a single-phase monitor for protecting circuits and motors in industrial automation. It helps operators reduce nuisance trips caused by transient currents through adjustable hysteresis and a selectable tripping delay. Certified to CE, UL/CSA, and UKCA standards, it supports compliant installations across global markets. With a 24-240 V AC/DC control supply and 2 SPDT outputs, it enables compact, reliable protection in motor control panels. The device leverages RMS current measurement and an open-circuit principle to detect faults accurately, delivering predictable response while simplifying maintenance and compliance documentation. This combination supports improved uptime and safer, more predictable electrical systems.
Product Information
Extended Description
1SVR730840R0400 ABB: The CM-SRS.21S 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 and works according to the open-circuit principle. The CM-SRS.21S is configurable for over- or undercurrent monitoring. The hysteresis is adjustable within a range of 3 to 30 % of the threshold value and the tripping delay is 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 screw connection technology with double-chamber cage connection 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
4016779852241
Minimum Order Quantity
1 piece
Customs Tariff Number
85364900
Data Sheet, Technical Information
Data sheet - CM-SRS.2P; CM-SRS.2S Current monitoring relays, 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
0.152 kg
Function
Over- or undercurrent monitoring
Measuring Range
3 ... 30 mA | 10 ... 100 mA | 0.1 ... 1 A
Time Range
0 s or 0.1 ... 30 s tripping delay (ON)
Rated Control Supply Voltage (Us)
24 ... 240 V AC/DC
Output
2 c/o (SPDT) contacts
Terminal Type
Screw 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 10 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 1x 0.5 ... 2.5 mm² | Flexible with Ferrule 2x 0.5 ... 1.5 mm² | Flexible with Insulated Ferrule 1x 0.5 ... 2.5 mm² | Flexible with Insulated Ferrule 2x 0.5 ... 1.5 mm² | Flexible 1x 0.5 ... 2.5 mm² | Flexible 2x 0.5 ... 1.5 mm² | Rigid 1x 0.5 ... 4 mm² | Rigid 2x 0.5 ... 2.5 mm²
Tightening Torque
0.6 ... 0.8 N·m
Wire Stripping Length
8 mm
Recommended Screw Driver
0.8 x 4 | 4.5 | Pozidriv 1
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 1x 18-14 AWG | Flexible 2x 18-16 AWG | Rigid 1x 20-12 AWG | Rigid 2x 20-14 AWG
Tightening Torque UL/CSA
7.08 in·lb
Pilot Duty UL/CSA
B300
Flammability According to UL94
V-0
Ambient Air Temperature
Operation -20 ... +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
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
0.174 kg
Package Level 1 EAN
4016779852241
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)
2712312
E-Number (Norway)
4188058
E-Number (Sweden)
3860627
Feature → Business Impact → Application. Feature: Control supply range 24-240 V AC/DC; Business Impact: simplifies global deployment by supporting both AC and DC control circuits and reducing the number of SKUs; Application: ideal for panel-based machines and line equipment powered from either mains type. Feature → RMS current measurement with three ranges: 3-30 mA, 10-100 mA, 0.1-1 A; Business Impact: delivers accurate fault detection across diverse loads, cutting nuisance trips; Application: motor protection, coil monitoring, and distributed power buses. Feature → 2 c/o SPDT outputs; Business Impact: enables direct interlocking, signaling, and fail-safe control without extra modules; Application: machine safety circuits and control panels. Feature → Adjustable hysteresis (3–30% of threshold) and tripping delay (0 s to 30 s); Business Impact: reduces chatter and improves selectivity, lowering unnecessary trips; Application: high-inertia motors and processes with variable loads. Feature → Screw terminals with double-chamber cage connection and DIN rail mounting options TH35-15/TH35-7.5; Business Impact: simplifies installation and maintenance while ensuring secure, vibration-resistant connections; Application: standard panel assemblies and compact control cabinets. Feature → Robust environmental and compliance specs: IP50 housing, -20 to +60 °C operation, CE/UL/CSA/UKCA and related certifications; Business Impact: supports safe, compliant operation in harsh environments and across global sites; Application: industrial automation in manufacturing and processing plants.
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FAQs
The CM-SRS.21S supports DIN-rail mounting (TH35-15 or TH35-7.5) and screw-terminal connections. Use the screw terminals for input, output, and supply connections, then snap the unit onto a standard 35 mm rail. This layout reduces wiring complexity and simplifies serviceability in compact control panels.
Measuring ranges are 3-30 mA, 10-100 mA, and 0.1-1 A with RMS measurement. Select a range that comfortably exceeds the normal running current of the monitored circuit, providing margin for startup surges. The device’s open-circuit principle ensures accurate detection across these ranges while minimizing false trips.
Yes. The CM-SRS.21S is designed for single-phase protection and works with 24-240 V AC/DC control voltage, making it compatible with a broad range of motors and control circuits. Its SPDT outputs can interlock or signal safety circuits, and RMS sensing helps handle typical motor startup transients reliably.
The relay carries CE, UL/CSA, and UKCA certifications among others. These standards support regulatory compliance across Europe and North America, ensure electrical safety and EMC performance, and facilitate cross-border installations in industrial environments. Certification alignment helps minimize compliance risk during audits and panel approvals.
Maintenance is minimized by robust construction, screw-terminal reliability, and a sealable cover option that prevents unauthorized changes. ROI comes from reduced nuisance trips, shorter downtime, and easier compliance reporting, plus the compact DIN-rail footprint that saves panel space and wiring time in motor-control and power-distribution installations.