BOM / RFQ

3RB2045-1EW1 - Siemens

MPN3RB2045-1EW1

Overload relay 25...100 A For motor protection Size S3, Class 10 Stand-alone installation Main circuit: Straight-through transformer Auxiliary circuit: Screw terminal Manual RESET!!! Phased-out product!!! Successor is SIRIUS 3RB3 Preferred successor type is >>3RB2046-1EW1<<

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

Specifications

3RB2045-1EW1 — Identification
Parameter	Value
Product brand name	SIRIUS
Product designation	solid-state overload relay
Combinable contactor sizes	S3

3RB2045-1EW1 — Protection & Trip
Parameter	Value
Trip class	CLASS 10E

3RB2045-1EW1 — Electrical (main circuit)
Parameter	Value
Poles (main circuit)	3
Rated surge withstand voltage	8 kV
Main current circuit	straight-through transformers

3RB2045-1EW1 — Auxiliary contacts
Parameter	Value
Auxiliary contacts: NO	1
Auxiliary contacts: NC	1
Auxiliary switch short-circuit protection (required fuse)	fuse gL/gG: 6 A
Switching current at 24 V	2 A
Switching current at 60 V	0.55 A
Switching current at 110 V	0.3 A
Switching current at 120 V	4 A
Switching current at 125 V	0.3 A
Switching current at 220 V	0.11 A
Switching current at 230 V	3 A

3RB2045-1EW1 — Connection & Mounting
Parameter	Value
Mounting position	any
Conductor cross-section: solid	0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)
Conductor cross-section: finely stranded with ferrule	0.5 ... 2.5 mm², 2x (0.5 ... 1.5 mm²)

3RB2045-1EW1 — Environmental
Parameter	Value
Operating temperature	-25 ... +60 °C
Storage temperature	-40 ... +80 °C
Transport temperature	-40 ... +80 °C
Relative humidity, operating	100 %
Shock resistance	15g / 11 ms