Omron A16-CTM Equivalent & Substitute Parts

Part Overview

The Omron A16-CTM is a configurable switch body component in the A16 series, designed as a round momentary pushbutton for panel-mount applications. This part functions as the base housing unit requiring separate contact blocks, illumination sources, and lenses for complete assembly. The A16-CTM is classified as obsolete, necessitating identification of active substitute components from the compatible M16 series to maintain system functionality and ensure continued availability for new installations and replacements.

Key Parameters

Parameter	Value
Manufacturer Part Number	A16-CTM
Manufacturer	Omron Automation and Safety
Series	A16
Product Type	Configurable Switch Body Pushbutton, Round
Actuator Type	Pushbutton, Momentary
Panel Cutout Dimensions	16mm (Round)
Product Status	Obsolete
RoHS Compliance	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute components for the A16-CTM are drawn from the Omron M16 series illumination source family. Substitution is determined by compatibility within the A16/M16 compatible series designation and matching panel cutout geometry. The M16 series illumination sources function as the required illumination component for the A16-CTM assembly.

Substitutes are grouped by two primary parameters:

Lamp Color: Green or Red variants
Operating Voltage: 110V AC/DC or 220V AC/DC

All substitute parts maintain the same lens style (round with flat top), ingress protection rating (IP40), and RoHS compliance status as the base component. Panel cutout dimensions vary between round (16.00mm) and square (18.00mm x 18.00mm) configurations depending on the specific illumination source model.

Parameter Comparison

Parameter	A16-CTM	M16-TG-T1	M16-TG-T1-S	M16-TG-T2-S	M16-TR-T1	M16-TR-T1-S	M16-TR-T2-S
Manufacturer	Omron	Omron	Omron	Omron	Omron	Omron	Omron
Series	A16	M16	M16	M16	M16	M16	M16
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Type	Switch Body	LED Indicator	LED Indicator	LED Indicator	LED Indicator	LED Indicator	LED Indicator
Lamp Color	N/A	Green	Green	Green	Red	Red	Red
Voltage Rating	N/A	110V	110V	220V	110V	110V	220V
Ratings	N/A	AC/DC	AC/DC	AC/DC	AC	AC/DC	AC/DC
Lens Style	N/A	Round with Flat Top	Round with Flat Top	Round with Flat Top	Round with Flat Top	Round with Flat Top	Round with Flat Top
Ingress Protection	N/A	IP40	IP40	IP40	IP40	IP40	IP40
RoHS Compliance	RoHS Compliant	N/A	N/A	N/A	RoHS Compliant	N/A	N/A

Engineering Selection Recommendations

Selection of substitute illumination sources for the A16-CTM assembly is determined by system voltage requirements and operational environment specifications.

For 110V AC/DC Systems:

M16-TG-T1 or M16-TG-T1-S (Green indicator)
M16-TR-T1 or M16-TR-T1-S (Red indicator)

M16-TR-T1 is the manufacturer-recommended primary substitute, maintaining RoHS compliance and MSL 1 rating consistent with the A16-CTM base component.

For 220V AC/DC Systems:

M16-TG-T2-S (Green indicator)
M16-TR-T2-S (Red indicator)

All substitute parts maintain active product status, ensuring long-term availability and supply chain continuity. Selection between quick-connect termination (M16-TG-T1, M16-TR-T1) and standard termination variants (-S suffix) depends on panel assembly requirements and connector compatibility specifications.

Frequently Asked Questions (FAQ)

Q: Why is the A16-CTM classified as obsolete? A: The A16-CTM is an older configurable switch body component. The M16 series represents the current active product line for equivalent functionality within the Omron A16/M16 compatible series designation.

Q: What determines compatibility between the A16-CTM and M16 series substitutes? A: Compatibility is established through the A16/M16 compatible series designation and matching panel cutout geometry. The M16 series illumination sources function as the illumination component required for A16-CTM assembly completion.

Q: Can M16-TR-T1 and M16-TR-T1-S be used interchangeably? A: Both parts provide equivalent red LED indicator functionality at 110V. The primary difference is termination style: M16-TR-T1 features quick-connect termination (0.110" / 2.8mm), while M16-TR-T1-S uses standard termination. Selection depends on panel assembly connector requirements.

Q: What is the difference between 110V and 220V variants? A: M16 series indicators are available in 110V and 220V voltage ratings. Selection must match the system operating voltage. 110V variants include M16-TG-T1, M16-TG-T1-S, M16-TR-T1, and M16-TR-T1-S. 220V variants are M16-TG-T2-S and M16-TR-T2-S.

Q: Are all substitute parts RoHS compliant? A: M16-TR-T1 explicitly maintains RoHS compliance and MSL 1 rating. RoHS status for other M16 variants is not specified in available documentation. Verify RoHS compliance requirements with component datasheets for specific application needs.

Q: What is the panel cutout dimension difference between substitutes? A: M16-TR-T1 uses a round panel cutout (16.00mm), matching the A16-CTM geometry. Other M16 variants use square panel cutouts (18.00mm x 18.00mm). Panel cutout geometry must be verified against existing panel specifications before component selection.

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