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Siemens 5TT5900 — Contactors

Siemens SENTRON 5TT5900 Auxiliary Current Switch, 2 NO, 230

MPN5TT5900

Siemens SENTRON auxiliary current switch, 5TT5900, 2 NO contacts, 230 V AC, 71 mm depth, 54 mm width.

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

Specifications

5TT5900 — Mechanical
ParameterValue
Width54 mm
Depth71 mm
5TT5900 — Other specifications
ParameterValue
Rated value230 V
Product extensionAuxiliary current switch
Design of the productMountable
Number of CO contacts0
Number of NC contacts0
Number of NO contacts2
Number of fault signal contacts0

Product details

The Siemens SENTRON 5TT5900 is an auxiliary current switch designed to mount onto the 5TT573, 5TT574, and 5TT575 series main switches. It adds two normally open (NO) contacts rated for 230 V AC, giving you a dry-contact status signal or a remote switching capability off the main switch's position.

The 5TT5900 is a mountable extension, not a standalone device — it clips onto the side of the compatible main switch. It measures 71 mm deep and 54 mm wide, so it adds that much to the overall footprint of the switch assembly on the DIN rail. The 2 NO contacts are the only switching elements; there are no NC or changeover contacts in this block.

Frequently asked questions

What are the key ratings for the 5TT5900?

The 5TT5900 provides 2 normally open (NO) contacts rated for 230 V AC. It is a mountable auxiliary switch with a depth of 71 mm and a width of 54 mm.

Will the 5TT5900 fit a panel designed for the 5SL4363-7?

No, these are different classes of device. The 5TT5900 is an auxiliary current switch that mounts onto specific main switches (5TT573/574/575). The 5SL4363-7 is a miniature circuit breaker with a different footprint and function. They are not direct drop-in replacements.

MPN
5TT5900