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Siemens 3UG5461-1AA40 — Process / Temperature Controllers

Siemens 3UG5461-1AA40 SIRIUS DC Load Monitoring Relay, ±8 A,

MPN3UG5461-1AA40
NRND

Siemens SIRIUS DC load monitoring relay, 3UG5461-1AA40, measurable current -8…+8 A, PROFINET IO, adjustable voltage 0…800 V, 22.5 mm width.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3UG5461-1AA40 — Identification
ParameterValue
Product functionDC load monitoring relay
Product designationDC load monitoring relay
Product line / brand nameSIRIUS
3UG5461-1AA40 — Communication
ParameterValue
Electrical connection typescrew-type terminals
3UG5461-1AA40 — Environmental
ParameterValue
Ingress protection (IP rating), wiredIP20
Installation altitude, max.2 000 m
3UG5461-1AA40 — Mechanical
ParameterValue
Fastening methodscrew and snap-on mounting onto 35 mm DIN rail
Mounting positionany
Width22.5 mm
Height100 mm
Depth141.6 mm
Conductor cross-section, solid1x (0.5 ... 4 mm²), 2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded (with ferrule)2x (0,5 ... 1,5 mm²), 1x (0,5 ... 4 mm²)
Mounting clearance, top50 mm
Mounting clearance, rear0 mm
Mounting clearance, side3 mm
Mounting clearance, front0 mm

Product details

The Siemens SIRIUS 3UG5461-1AA40 is a DC load monitoring relay designed to supervise DC circuits for overcurrent, undercurrent, overvoltage, and undervoltage conditions, with a measurable current range of -8 to +8 A and an adjustable voltage range of 0 to 800 V. It communicates via PROFINET IO (conformity class A), making it a drop-in for modern networked control systems without needing a separate analog input card — the relay reports thresholds and trip status directly over the fieldbus.

It carries EMC compliance to IEC 60947-1, IEC 61000-6-2, and IEC 61000-6-4, which covers industrial immunity and emission requirements for CE-marked panels.

Frequently asked questions

What is the mounting footprint?

It snaps onto a 35 mm DIN rail (screw and snap-on mounting) and occupies 22.5 mm width, 100 mm height, and 141.6 mm depth. Clearance: 50 mm above and below, 3 mm at the sides, 0 mm forward and backward.

What wire sizes does the terminal accept?

Solid wire: 1x (0.5 to 4 mm²) or 2x (0.5 to 2.5 mm²). Stranded: same ranges. Strip length is not specified but standard for spring-cage terminals.

MPN
3UG5461-1AA40