Honeywell 21CX4E Equivalent & Substitute Parts

Part Overview

The Honeywell 21CX4E is a snap-action switch with SPDT x 4 configuration, rated for 15A AC at 125V and 500mA DC at 125V. This chassis-mount switch features side rotary actuation without lever, screw terminal termination, and IP66 ingress protection with explosion-proof construction. The 21CX4E is classified as obsolete, necessitating identification of active equivalent parts to ensure continued availability and supply chain continuity for applications requiring this switch topology and electrical performance.

Substiute Parts

21CX4E

Honeywell Sensing and Productivity SolutionsIn Stock: 80321CX4E Datasheet

Current PartRFQ

21CX4

Honeywell Sensing and Productivity SolutionsIn Stock: 101121CX4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 21CX4E is based on electrical and mechanical parameter equivalence. The substitute part 21CX4 maintains identical specifications across all critical parameters: SPDT x 4 circuit configuration, On-Mom switch function, 15A AC and 500mA DC current ratings, 125V AC and DC voltage ratings, side rotary actuator without lever, chassis mount configuration, screw terminal termination, IP66 ingress protection, and identical mechanical characteristics including operating force (126gfm), release force (11gfm), pretravel (15°), differential travel (10°), and overtravel (90°).

The key substitution criteria are:

• Identical circuit topology (SPDT x 4)
• Matching electrical ratings (15A AC / 500mA DC at 125V AC/DC)
• Equivalent mechanical actuation characteristics
• Same mounting and termination interface
• Equivalent environmental protection (IP66)
• Identical operating temperature range (-25°C to 85°C)

The 21CX4 differs from the 21CX4E only in product status (active versus obsolete) and RoHS compliance status, with no functional or electrical differences.

Parameter Comparison

Engineering Selection Recommendations

The 21CX4 is the direct functional equivalent of the obsolete 21CX4E. Selection of the 21CX4 as a replacement is based on:

Product Status: The 21CX4 maintains active product status with current manufacturing and supply availability, whereas the 21CX4E is obsolete. This ensures long-term supply chain reliability and eliminates obsolescence risk.

Compliance Improvement: The 21CX4 achieves RoHS compliance, whereas the 21CX4E is RoHS non-compliant. This provides enhanced regulatory alignment for applications subject to RoHS requirements.

Electrical and Mechanical Equivalence: All electrical ratings, mechanical characteristics, and operational parameters are identical between the two parts. No circuit redesign or mechanical modification is required for substitution.

Certification and Classification: Both parts share identical ECCN (EAR99) and HTSUS (8536.50.9055) classifications, ensuring consistent export and tariff treatment.

The 21CX4 is suitable for direct replacement in all applications currently using the 21CX4E without modification to circuit design, mechanical mounting, or electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can the 21CX4 directly replace the 21CX4E without any modifications?

A: Yes. The 21CX4 is electrically and mechanically identical to the 21CX4E. All electrical ratings (15A AC / 500mA DC at 125V), circuit configuration (SPDT x 4), mechanical characteristics (operating force, travel angles), mounting interface (chassis mount with screw terminals), and environmental protection (IP66) are identical. No circuit redesign or mechanical modification is required.

Q: What is the difference between the 21CX4E and 21CX4?

A: The primary differences are product status and RoHS compliance. The 21CX4E is obsolete and RoHS non-compliant, while the 21CX4 is an active product with RoHS compliance. All functional and electrical specifications are identical.

Q: Why is the 21CX4E classified as obsolete?

A: The 21CX4E has been discontinued by Honeywell Sensing and Productivity Solutions. The 21CX4 serves as the active replacement part with identical specifications.

Q: Are there packaging differences between the 21CX4E and 21CX4?

A: The 21CX4E is supplied in standard packaging, while the 21CX4 is supplied in bulk packaging. This does not affect the electrical or mechanical performance of the switch itself.

Q: What is the current inventory status for these parts?

A: The 21CX4E has 750 pieces in stock as new original inventory. The 21CX4 has 971 pieces in stock as new original inventory. The 21CX4 is recommended for new designs and replenishment due to its active product status.

Q: Are the mechanical actuation characteristics identical?

A: Yes. Both parts have identical operating force (126gfm), release force (11gfm), pretravel (15°), differential travel (10°), and overtravel (90°). The side rotary actuator without lever is identical on both parts.

Q: What is the operating temperature range for these switches?

A: Both the 21CX4E and 21CX4 operate across the temperature range of -25°C to 85°C.

Q: Are export classifications the same for both parts?

A: Yes. Both parts share identical ECCN (EAR99) and HTSUS (8536.50.9055) classifications.