E21-00AX Equivalent & Substitute Parts

Part Overview

The E21-00AX is a snap-action SPDT switch manufactured by ZF Electronics, designed for chassis mount applications with quick connect termination. This switch is rated for 100mA AC at 125V and 250mA DC at 30V, featuring a round pin plunger actuator with on-momentary function. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing maintenance, repair, and new design implementations where similar electrical and mechanical characteristics are required.

Key Parameters

Parameter	E21-00AX Value
Circuit Configuration	SPDT
Switch Function	On-Momentary
Current Rating (AC)	100mA
Current Rating (DC)	250mA
Voltage Rating (AC)	125V
Voltage Rating (DC)	30V
Actuator Type	Round (Pin Plunger)
Mounting Type	Chassis Mount
Termination Style	Quick Connect - 0.187" (4.7mm)
Operating Position	0.579" (14.7mm)
Operating Temperature Range	-40°C to 85°C
Electrical Life	6,000 Cycles
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the E21-00AX is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Circuit configuration must be SPDT
Switch function must be On-Momentary
Mounting type must be Chassis Mount
Termination style must be Quick Connect - 0.187" (4.7mm)
Operating position must be 0.579" (14.7mm)
Actuator type must be Round (Pin Plunger)

Electrical Compatibility Parameters:

AC voltage rating must be equal to or greater than 125V
DC voltage rating must be equal to or greater than 30V
Current ratings must support the application requirements

Environmental Compatibility Parameters:

Operating temperature range must encompass or exceed -40°C to 85°C
RoHS compliance status must be ROHS3 or equivalent

Substitute parts are grouped into two categories: direct manufacturer equivalents from ZF Electronics and compatible alternatives from other manufacturers that meet all mandatory parameters while maintaining electrical and mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Circuit	Current (AC)	Current (DC)	Voltage AC	Voltage DC	Actuator Type	Operating Position	Operating Temp	Electrical Life	RoHS Status	Product Status
E21-00AX	ZF Electronics	SPDT	100mA	250mA	125V	30V	Round (Pin Plunger)	0.579" (14.7mm)	-40°C to 85°C	6,000 Cycles	ROHS3	Obsolete
D419-R1AA-G2	ZF Electronics	SPDT	100mA	500mA	250V	30V	Round (Pin Plunger)	0.579" (14.7mm)	-40°C to 85°C	50,000 Cycles	ROHS3	Active
TFCCF5SP0040C	C&K	SPDT	1A	1A	125V	30V	Round (Pin Plunger)	0.579" (14.7mm)	-40°C to 85°C	6,000 Cycles	ROHS3	Active
V15T16-EZ200A01-K	Honeywell	SPDT	16A	Not Specified	250V	Not Specified	Lever, Straight	0.602" (15.3mm)	-25°C to 125°C	50,000 Cycles	RoHS	Active
V15T16-EZ200A05-K	Honeywell	SPDT	16A	Not Specified	250V	Not Specified	Lever, Roller	0.812" (20.6mm)	-25°C to 125°C	50,000 Cycles	RoHS	Active
83261041	Crouzet	SPDT	16A	Not Specified	250V	Not Specified	Round (Pin Plunger)	0.579" (14.7mm)	-20°C to 125°C	Not Specified	RoHS	Active
83262041	Crouzet	SPDT	20A	Not Specified	250V	Not Specified	Round (Pin Plunger)	0.579" (14.7mm)	-20°C to 125°C	Not Specified	RoHS	Active
83263041	Crouzet	SPDT	16A	Not Specified	250V	Not Specified	Round (Pin Plunger)	0.579" (14.7mm)	-20°C to 125°C	Not Specified	RoHS	Active
83264041	Crouzet	SPDT	12A	Not Specified	250V	Not Specified	Round (Pin Plunger)	0.579" (14.7mm)	-20°C to 125°C	Not Specified	RoHS	Active
83268041	Crouzet	SPDT	50mA	50mA	24V	24V	Round (Pin Plunger)	0.579" (14.7mm)	-20°C to 150°C	Not Specified	RoHS	Active
83269041	Crouzet	SPDT	50mA	50mA	24V	24V	Round (Pin Plunger)	0.579" (14.7mm)	-20°C to 150°C	Not Specified	RoHS	Active

Engineering Selection Recommendations

Primary Recommendation: D419-R1AA-G2

The D419-R1AA-G2 from ZF Electronics is the direct manufacturer equivalent. It maintains identical mechanical specifications, mounting configuration, and termination style as the E21-00AX. The D419-R1AA-G2 provides enhanced electrical performance with 500mA DC current capacity and 250V AC rating, while maintaining the same operating temperature range and ROHS3 compliance. Electrical life is extended to 50,000 cycles. This part is currently in active production status with 1,086 units in stock.

Secondary Recommendation: TFCCF5SP0040C

The TFCCF5SP0040C from C&K is a compatible substitute that maintains all mandatory mechanical parameters including round pin plunger actuator, 0.579" operating position, and quick connect termination. It provides identical voltage ratings (125V AC, 30V DC) and operating temperature range (-40°C to 85°C) as the E21-00AX. Current capacity is increased to 1A AC/DC. ROHS3 compliance is maintained. This part is active with 913 units in stock.

Alternative Consideration: Crouzet V3D Series

The Crouzet V3D series switches (83261041, 83262041, 83263041, 83264041) maintain the round pin plunger actuator and 0.579" operating position. These parts feature 250V AC rating and RoHS compliance. However, they are rated for significantly higher AC currents (12A to 20A) and are designed for applications requiring higher current capacity. These parts are suitable only if the application can accommodate the higher operating force specifications.

Not Recommended: Honeywell V15T16 Series

The V15T16-EZ200A01-K and V15T16-EZ200A05-K feature different actuator types (lever instead of round pin plunger) and different operating positions (0.602" and 0.812" respectively), making them mechanically incompatible with the E21-00AX mounting and actuation requirements.

Frequently Asked Questions (FAQ)

Q: Can the D419-R1AA-G2 be used as a direct replacement for the E21-00AX?

A: Yes. The D419-R1AA-G2 maintains identical mechanical specifications, mounting type, termination style, and operating position. It is electrically compatible with enhanced performance characteristics and is the recommended substitute from the original manufacturer.

Q: What is the primary difference between the E21-00AX and its substitutes?

A: The E21-00AX is obsolete. The D419-R1AA-G2 provides the same mechanical interface with improved electrical life (50,000 cycles versus 6,000 cycles) and higher current capacity. The TFCCF5SP0040C from C&K provides equivalent performance with identical electrical ratings and operating temperature range.

Q: Are the Crouzet V3D series switches compatible with E21-00AX applications?

A: The Crouzet switches maintain the same actuator type and operating position, making them mechanically compatible. However, they are rated for significantly higher AC currents (12A to 20A) and feature higher operating forces. They are suitable only for applications where these specifications are acceptable.

Q: What are the critical parameters that determine substitution compatibility?

A: Mandatory parameters include SPDT circuit configuration, on-momentary function, round pin plunger actuator, chassis mount type, quick connect 0.187" termination, and 0.579" operating position. Electrical ratings must meet or exceed 125V AC and 30V DC. Operating temperature range must encompass -40°C to 85°C.

Q: Does the TFCCF5SP0040C maintain the same electrical specifications as the E21-00AX?

A: Yes. The TFCCF5SP0040C maintains identical voltage ratings (125V AC, 30V DC) and operating temperature range (-40°C to 85°C). Current capacity is increased from 100mA AC to 1A AC/DC, providing greater margin for the application.

Q: What is the packaging difference between substitute parts?

A: The D419-R1AA-G2 is supplied in bulk packaging. The TFCCF5SP0040C is supplied in bulk packaging. Crouzet parts are supplied without specified packaging. Honeywell V15T16 series parts are supplied in bulk packaging. Packaging differences do not affect electrical or mechanical compatibility.

Q: Are all substitute parts RoHS compliant?

A: Yes. The D419-R1AA-G2 and TFCCF5SP0040C maintain ROHS3 compliance. The Crouzet and Honeywell parts are RoHS compliant. All substitutes meet current environmental compliance requirements.

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