PLC-RSC-12DC/21AU/MS General Purpose Relay Equivalent & Substitute Parts

Part Overview

The Phoenix Contact PLC-RSC-12DC/21AU/MS is a general purpose relay with SPDT (1 Form C) contact configuration and 12VDC coil voltage, designed for DIN rail mounting applications. This part is classified as obsolete, necessitating identification of active equivalent models to maintain system functionality and ensure continued availability for new installations and replacements.

The relay features a 6A contact rating, non-latching coil type, and integrated diode with lighted indicator. The obsolete status of the original part number 2909654 requires substitution with an active equivalent to support procurement and supply chain continuity.

Key Parameters

Parameter	Specification
Coil Voltage	12VDC
Contact Form	SPDT (1 Form C)
Contact Rating (Current)	6 A
Switching Voltage	250VAC, 250VDC - Max
Mounting Type	DIN Rail
Coil Type	Non Latching
Coil Current	15.3 mA
Operating Temperature Range	-40°C ~ 60°C
Contact Material	Silver Tin Oxide (AgSnO), Gold (Au)
Coil Resistance	784.314 Ohms

Substitute Part Grouping Explanation

Substitution of the obsolete PLC-RSC-12DC/21AU/MS (part number 2909654) is based on electrical and mechanical parameter equivalence within the PLC-RSC series. The substitute part must maintain identical specifications across the following critical parameters:

Coil voltage: 12VDC
Contact configuration: SPDT (1 Form C)
Contact current rating: 6 A
Switching voltage: 250VAC, 250VDC maximum
Mounting interface: DIN rail
Coil type: Non-latching
Coil current draw: 15.3 mA
Operating temperature range: -40°C to 60°C
Contact material composition: Silver Tin Oxide and Gold

The substitute part 2909671 satisfies all electrical and mechanical equivalence criteria, with the primary distinction being termination style (spring terminal versus screw terminal) and active product status with current compliance certifications.

Parameter Comparison

Parameter	PLC-RSC-12DC/21AU/MS (2909654)	PLC-RSC-12DC/21AU/MS (2909671)
Manufacturer	Phoenix Contact	Phoenix Contact
Series	PLC-RSC	PLC-RSC
Product Status	Obsolete	Active
Coil Voltage	12VDC	12VDC
Contact Form	SPDT (1 Form C)	SPDT (1 Form C)
Contact Rating (Current)	6 A	6 A
Switching Voltage	250VAC, 250VDC - Max	250VAC, 250VDC - Max
Coil Current	15.3 mA	15.3 mA
Coil Type	Non Latching	Non Latching
Features	Diode, Lighted Indicator, Socket Included	Diode, Lighted Indicator, Socket Included
Termination Style	Screw Terminal	Spring Terminal
Coil Resistance	784.314 Ohms	784.314 Ohms
Operating Temperature	-40°C ~ 60°C	-40°C ~ 60°C
Contact Material	Silver Tin Oxide (AgSnO), Gold (Au)	Silver Tin Oxide (AgSnO), Gold (Au)
Mounting Type	DIN Rail	DIN Rail
Must Operate Voltage	Not specified	9.7 VDC
RoHS Status	Not specified	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	Not specified	1 (Unlimited)
REACH Status	Not specified	REACH Affected
ECCN	EAR99	EAR99

Engineering Selection Recommendations

The substitute part number 2909671 is the manufacturer-recommended equivalent for the obsolete PLC-RSC-12DC/21AU/MS (2909654). Both parts maintain identical electrical and mechanical specifications, ensuring functional compatibility in existing circuit designs and applications.

The primary distinction between the two parts is termination style: the original part uses screw terminals, while the substitute uses spring terminals. This difference requires evaluation of the installation method and panel layout compatibility.

The substitute part 2909671 carries active product status with current compliance certifications including ROHS3 compliance and REACH affected status, ensuring regulatory alignment for new installations and long-term supply chain availability. The specified must-operate voltage of 9.7 VDC provides defined operational parameters for the active substitute.

Both parts share identical ECCN classification (EAR99), maintaining export control consistency.

Frequently Asked Questions (FAQ)

Q: Are the electrical specifications identical between part numbers 2909654 and 2909671?

A: Yes. Both parts maintain identical coil voltage (12VDC), contact configuration (SPDT), current rating (6A), switching voltage (250VAC/250VDC), coil current (15.3 mA), and operating temperature range (-40°C to 60°C).

Q: What is the primary difference between these two part numbers?

A: The termination style differs: part 2909654 uses screw terminals, while part 2909671 uses spring terminals. Both parts are DIN rail mounted with identical electrical performance.

Q: Why is part 2909654 listed as obsolete?

A: Part 2909654 has reached end-of-life status. Phoenix Contact recommends transitioning to part 2909671, which is the active equivalent with current compliance certifications.

Q: Can part 2909671 be used as a direct replacement in existing installations?

A: Electrical compatibility is confirmed. Terminal connection method must be evaluated based on the existing installation's wiring configuration. Spring terminals and screw terminals require different connection techniques.

Q: What compliance certifications does the substitute part carry?

A: Part 2909671 is ROHS3 compliant, REACH affected, and classified as EAR99 for export control purposes. Moisture sensitivity level is rated as 1 (unlimited).

Q: Is the coil resistance identical between both parts?

A: Yes. Both parts have a coil resistance of 784.314 Ohms, ensuring equivalent electrical behavior in control circuits.

Q: What is the must-operate voltage specification for the substitute part?

A: Part 2909671 specifies a must-operate voltage of 9.7 VDC, defining the minimum coil voltage required for reliable relay operation.

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