Omron A165-CTM Equivalent & Substitute Parts

Part Overview

The Omron A165-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 that accepts contact blocks, illumination sources, and lenses to create a complete switch assembly. The A165-CTM is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new installations where A16 series compatibility is required.

Key Parameters

Parameter	Value
Manufacturer Part Number	A165-CTM
Manufacturer	Omron Automation and Safety
Series	A16
Product Type	Configurable Switch Body Pushbutton, Round
Actuator Type	Pushbutton, Round
Switch Type	Momentary
Panel Cutout Dimensions	16mm (Round)
Compatible Series	Omron A16, M16
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

The A165-CTM is a switch body component that requires illumination sources and contact blocks for complete functionality. The substitute parts listed are LED panel indicators from the M16 series that are mechanically and electrically compatible with the A16 series housing. Substitution is determined by the following parameters:

Series Compatibility: M16 series indicators are designed to integrate with A16 series switch bodies
Panel Cutout Dimensions: 16mm round cutout for direct mechanical fit
Voltage Rating: Available in 110V and 220V AC/DC configurations
Lens Color and Transparency: Green and red diffused options for visual indication
Ingress Protection: IP66 rating maintained across all substitutes
RoHS Compliance: All substitutes maintain RoHS compliance status
Termination Style: Quick Connect options for 110V variants; alternative mounting for 220V variants

Parameter Comparison

Parameter	A165-CTM	M165-TG-T1	M165-TG-T1-S	M165-TG-T2-S	M165-TR-T1	M165-TR-T1-S	M165-TR-T2-S
Manufacturer	Omron	Omron	Omron	Omron	Omron	Omron	Omron
Series	A16	M16	M16	M16	M16	M16	M16
Panel Cutout Shape	Round	Round	Square	Square	Round	Square	Round
Panel Cutout Dimensions	16mm (Round)	0.63" (16.00mm)	0.71" x 0.71" (18.00mm x 18.00mm)	0.71" x 0.71" (18.00mm x 18.00mm)	0.63" (16.00mm)	0.71" x 0.71" (18.00mm x 18.00mm)	0.63" (16.00mm)
Lens Size	—	15.10mm Dia	15.10mm Dia	15.10mm Dia	15.10mm Dia	15.10mm Dia	15.10mm Dia
Lens Style	—	Round with Flat Top	Round with Flat Top	Round with Flat Top	Round with Flat Top	Round with Flat Top	Round with Flat Top
Voltage Rating	—	110V AC/DC	110V AC/DC	220V AC/DC	110V AC/DC	110V AC/DC	220V AC/DC
Ingress Protection	—	IP66	IP66	IP66	IP66	IP66	IP66
RoHS Status	RoHS Compliant	RoHS Compliant	—	—	RoHS Compliant	—	RoHS Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Round Panel Cutout (16mm) Applications: Select M165-TG-T1 (green, 110V) or M165-TR-T1 (red, 110V) for direct mechanical and electrical compatibility with existing A16 series installations. Both parts maintain RoHS compliance and IP66 ingress protection. M165-TR-T2-S provides 220V operation in round configuration.

For Square Panel Cutout (18mm) Applications: M165-TG-T1-S (green, 110V), M165-TG-T2-S (green, 220V), M165-TR-T1-S (red, 110V), and M165-TR-T2-S (red, 220V) accommodate panel modifications or new installations with expanded cutout dimensions while maintaining M16 series compatibility.

Voltage Consideration: 110V variants (T1 designation) are available with quick-connect termination for rapid installation. 220V variants (T2 designation) provide alternative voltage operation for international or high-voltage applications.

Product Status: All substitute parts carry active product status, ensuring ongoing availability and manufacturer support, unlike the obsolete A165-CTM.

Frequently Asked Questions (FAQ)

Q: Can M165 series indicators directly replace the A165-CTM in existing assemblies? A: The M165 series indicators are compatible with A16 series switch bodies through the M16 series interface. Mechanical fit depends on panel cutout dimensions: round 16mm cutouts accept M165-TG-T1 and M165-TR-T1 directly. Square 18mm cutouts require M165-TG-T1-S, M165-TG-T2-S, M165-TR-T1-S, or M165-TR-T2-S variants.

Q: What is the difference between T1 and T2 designations? A: T1 variants operate at 110V AC/DC with quick-connect termination. T2 variants operate at 220V AC/DC. Selection depends on system voltage requirements.

Q: Are there differences between round and square panel cutout versions? A: Round versions (M165-TG-T1, M165-TR-T1, M165-TR-T2-S) fit 16mm round cutouts. Square versions (M165-TG-T1-S, M165-TG-T2-S, M165-TR-T1-S) fit 18mm x 18mm square cutouts. Panel modification may be required for square cutout installation.

Q: Do all substitute parts maintain the same ingress protection rating? A: Yes, all M165 series substitutes maintain IP66 ingress protection and oil-resistant features consistent with the original A16 series design.

Q: What RoHS compliance status applies to these substitutes? A: M165-TG-T1, M165-TR-T1, and M165-TR-T2-S carry explicit RoHS compliance certification. Compliance status for M165-TG-T1-S, M165-TG-T2-S, and M165-TR-T1-S is not specified in available documentation.

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