Schneider Electric RUZC3M Socket for RUMC3 Relays

RUZC3M relay socket: what it is

RUZC3M is a 10 A mixed-contact socket for three-pole RUM relays. In the Schneider Electric Harmony Electromechanical Relays range it belongs to the RUZ socket line, and the datasheet records the compatible relay as: Plug-in relay RUM with 3 C/O contact, Plug-in relay RE48A with 2 C/O contact.

A socket like this is the part of a relay installation that outlasts relays: it carries the wiring, takes the clip-in relay and lets a failed relay be swapped without touching a single conductor. Sockets in this family look alike, so check the part number against the relay series and contact count before ordering.

Seven Star LLC supplies RUZC3M in Oman and the GCC as an independent industrial supplier in Muscat; the datasheet we hold is dated 8 Nov 2026.

Typical use of RUZC3M in Oman and the GCC

Typical uses are universal relay duty with three changeover contacts, such as interposing between control circuits and larger contactors. Such panels are found in power stations, desalination plants, oil and gas facilities and building services across Oman, usually in air-conditioned rooms or sealed cabinets.

The datasheet limits operation to -40–55 °C and lists pollution degree 3 and overvoltage category III; heat build-up in sun-exposed enclosures and dust ingress through poor cable entries are the practical risks to design around.

Information to send with an RFQ

To quote correctly we need:

• Part number RUZC3M and the quantity.
• The relay part number that will sit in the socket.
• Wire size, ferrule use and panel or rail mounting.
• Delivery location in Oman or the GCC and any project reference.

Installation and maintenance notes

RUZC3M can be fixed by panel screws or clipped onto a 35 mm symmetrical rail. The listed ambient range is -40–55 °C for operation and -40–85 °C for storage; IP20 on the socket means it belongs inside an enclosure.

Good practice is to identify each socket on the panel drawing, retorque terminals after the first thermal cycle, and inspect for discoloured terminals at routine shutdowns. A failed relay is replaced by unplugging it; the socket stays wired, which keeps downtime short.

Socket family comparison

Relays and parts that go with RUZC3M

The datasheet also lists the RE48A timing relay with 2 C/O contact as compatible, which makes the socket useful in panels that mix universal relays and timers. A separate-contact alternative for RUMC3 relays is RUZSC3M.

For reference, the compatibility entry in the RUZC3M datasheet reads: Plug-in relay RUM with 3 C/O contact, Plug-in relay RE48A with 2 C/O contact. Where a project needs a time function, the RUW101MW multifunction timer module lists sockets of the RPZ and RUZ lines as compatible; check its own datasheet for the exact sockets that apply.

RUZC3M technical specifications

Selection and ordering checklist for RUZC3M

Confirm the following before you order RUZC3M:

• The relay type and contact count must match: this socket is for 3 C/O RUM relays.
• Current: the datasheet gives 10 A conventional free-air thermal current and operational voltage < 250 V.
• Width on the rail: 38 mm; net weight 0.054 kg.
• Wire sizes and whether ferrules are fitted, against the terminal table above.
• Packaging: the datasheet shows a sale quantity of 10, so confirm how many you need.

Wiring and terminal details

The datasheet lists these conductor sizes for this unit: Connector, 1 × 0.25–1 × 2.5 mm² (22 AWG–14 AWG) flexible with cable end Connector, 2 × 0.25–2 × 1 mm² (22 AWG–17 AWG) flexible with cable end Connector, 1 × 0.5–1 × 2.5 mm² (20 AWG–14 AWG) solid without cable end Connector, 2 × 0.5–2 × 1.5 mm² (20 AWG–16 AWG) solid without cable end. Tighten to the value stated, which is < 1 N.m for M3.5 screw(s), and use ferrules on stranded wire in line with the flexible-with-cable-end entries.

The contact terminal arrangement is described as mixed and the pin shape as cylindrical. That pin shape must match the relay, so the cylindrical pin shape means flat-pin relays from other ranges do not belong in this socket.

Documents and quotation

The datasheet for this unit is attached to this page (document dated 8 Nov 2026). Please treat it as the reference for every figure above, and tell us if your project specification asks for anything the datasheet does not state.

Send the part number, quantity, required delivery point and any project reference through the quotation form or by email. Seven Star LLC is an independent industrial supplier based in Muscat, serving customers across Oman and the GCC, and we reply with availability and lead time for this exact part number.