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Siemens 3RN2012-1BA30 Thermistor Motor Protection Relay with Auto Reset

Siemens 3RN2012-1BA30 Thermistor Motor Protection Relay with 2 C/O contacts and auto reset.

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ManufacturerSiemens

Part number3RN2012-1BA30

Enclosure 22.5 mm

Terminals Screw

Contacts 2 Changeover

Supply Voltage (Us) 24 V AC/DC

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CAGE: 9NK75

Thermistor motor protection Manual, auto, and remote reset 22.5mm width Screw terminals ATEX certified Wire-break and short-circuit monitoring

Product description

The Siemens 3RN2012-1BA30 is a robust thermistor motor protection relay designed for standard evaluation units. It features a compact 22.5mm enclosure with convenient screw terminals and provides 2 changeover contacts. This relay operates on 24V AC/DC and offers multiple reset options: manual, automatic, and remote. It is ATEX approved and includes two LEDs to indicate ready or tripped status.

This relay is essential for safeguarding motors in demanding industrial environments, offering features like wire-break monitoring, short-circuit monitoring, and non-volatile memory. Its auto-reset capability simplifies operation and reduces downtime in applications where immediate restart after a fault is permissible.

Stanlo Automation, a trusted veteran-owned surplus parts distributor, offers the Siemens 3RN2012-1BA30. We ensure reliable, high-quality components and provide excellent customer support, making us your go-to source for industrial automation needs.

Technical specifications

Enclosure	22.5 mm
Terminals	Screw
Contacts	2 Changeover
Supply Voltage (Us)	24 V AC/DC
Reset	Manual/Auto/Remote
LEDs	Ready/Tripped
Monitoring	Wire-break, Short-circuit
Memory	Non-volatile
Approvals	ATEX

Common applications

Motor control centers

Manufacturing equipment

Material handling systems

Food processing machinery

Water/wastewater treatment

Industrial automation

Compatible systems

Designed for use with standard PTC thermistor sensors and compatible with various Siemens motor protection configurations.

Also known as

Siemens 3RN2012-1BA30 Siemens auto reset motor relay

Replaces / compatible with

Replaces older Siemens thermistor relays with manual reset, offering enhanced auto-reset functionality. Compatible with standard thermistor sensor configurations.

Technical note

Expert tip

The auto-reset function is often used in applications where continuous operation is prioritized, but requires careful consideration of safety interlocks.

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Frequently asked questions

What types of reset functions are available on the Siemens 3RN2012-1BA30 relay?

The Siemens 3RN2012-1BA30 features manual, automatic, and remote reset options, providing flexibility for different operational requirements and safety protocols.