M2123TFG02 Equivalent & Substitute Parts

Part Overview

The M2123TFG02 is a miniature illuminated toggle switch manufactured by NKK Switches, configured as a DPDT (Double Pole Double Throw) panel mount component with On-Off-On switching function. This part features LED illumination in green and quick connect termination. The M2123TFG02 is classified as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications.

Substiute Parts

M2123TFG02

NKK SwitchesIn Stock: 742M2123TFG02 Datasheet

Current PartRFQ

M2123TFG01

NKK SwitchesIn Stock: 1050M2123TFG01 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M2123TFG02 is determined by strict equivalence across the following critical parameters:

• Circuit configuration (DPDT)
• Switch function (On-Off-On)
• Mounting type (Panel Mount)
• Electrical ratings (0.4VA at 28V AC/DC)
• Actuator specifications (Standard Round, 14.70mm length)
• Illumination type (LED, Green)
• Panel cutout dimensions (Circular - 6.50mm Dia)
• Bushing thread (1/4-40)
• Operating temperature range (-10°C ~ 55°C)
• Electrical life (25,000 Cycles)

The M2123TFG01 meets all these criteria and is classified as an active product, making it a direct functional equivalent for the obsolete M2123TFG02. The primary difference lies in termination style: the M2123TFG02 uses Quick Connect - 0.062" (1.5mm) termination, while the M2123TFG01 uses Solder Lug termination. This difference requires circuit board design consideration but does not affect electrical performance or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The M2123TFG01 is the recommended substitute for the obsolete M2123TFG02. Both parts are manufactured by NKK Switches within the M2100 series and maintain identical electrical and mechanical specifications across all critical parameters.

The M2123TFG01 carries active product status, ensuring ongoing availability and supply chain continuity. Both parts maintain RoHS compliance, with the M2123TFG02 certified to ROHS3 and the M2123TFG01 to RoHS standards.

The illumination voltage differential (2.2 VDC vs. 2.1 VDC) is within acceptable tolerance for LED operation and does not constitute a functional limitation.

The termination style difference requires circuit board design modification: transition from quick connect terminals to solder lug connections. This change affects assembly methodology but does not impact electrical performance, switching characteristics, or mechanical fit within the panel cutout.

Frequently Asked Questions (FAQ)

Q: Can M2123TFG01 be used as a direct replacement for M2123TFG02 in existing designs?

A: Electrical and mechanical compatibility is complete. The termination style difference requires circuit board redesign to accommodate solder lug connections instead of quick connect terminals. Panel cutout dimensions and bushing thread specifications remain identical.

Q: What is the significance of the illumination voltage difference between these parts?

A: The M2123TFG02 operates at 2.2 VDC nominal illumination voltage while the M2123TFG01 operates at 2.1 VDC. This 0.1 VDC difference is within standard LED operating tolerance and does not affect illumination performance or reliability.

Q: Are both parts RoHS compliant?

A: Yes. The M2123TFG02 is ROHS3 compliant and the M2123TFG01 is RoHS compliant. Both meet environmental and hazardous substance restrictions for electronic components.

Q: What are the panel mounting requirements for these switches?

A: Both parts require a circular panel cutout of 6.50mm diameter and use a 1/4-40 bushing thread for secure panel mounting. Mechanical fit and installation procedures are identical.

Q: Why is the M2123TFG02 classified as obsolete?

A: Product obsolescence reflects manufacturer discontinuation. The M2123TFG01 remains in active production and provides equivalent functionality, making it the appropriate selection for new designs and ongoing production requirements.