SZL-VL-E Equivalent & Substitute Parts Reference

Part Overview

The SZL-VL-E is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions, designed for chassis mount applications with screw terminal connections. This switch is rated for 5A AC at 250V and 400mA DC at 125V, featuring a cross roller plunger actuator and IP64 ingress protection. The product is currently obsolete, necessitating identification of functionally compatible alternatives for ongoing maintenance and replacement applications.

Substiute Parts

SZL-VL-E

Honeywell Sensing and Productivity SolutionsIn Stock: 745SZL-VL-E Datasheet

Current PartRFQ

SZL-VL-S-E-N-M

Honeywell Sensing and Productivity SolutionsIn Stock: 911SZL-VL-S-E-N-M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the SZL-VL-E is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Circuit configuration: SPDT (DB/DM)
• Switch function: On-Momentary operation
• Actuator type: Cross roller plunger
• Mounting type: Chassis mount
• Termination style: Screw terminal
• Base series: SZL-VL family

Electrical Parameters Subject to Application Requirements:

• Current rating (AC/DC)
• Voltage rating (AC/DC)
• Ingress protection rating

The substitute part SZL-VL-S-E-N-M maintains all mandatory compatibility criteria while operating at different electrical ratings and enhanced environmental protection. This part belongs to the same SZL-VL base product family and shares identical mechanical and functional architecture.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SZL-VL-E is obsolete, while the SZL-VL-S-E-N-M is active production. For new designs and ongoing procurement, the SZL-VL-S-E-N-M is the appropriate selection from the SZL-VL family.

Compliance and Certification: Both parts are RoHS Compliant with MSL Rating 1 (Unlimited moisture sensitivity level). The SZL-VL-S-E-N-M carries REACH Unaffected status, providing additional regulatory clarity for European applications.

Electrical Rating Differences: The SZL-VL-S-E-N-M operates at reduced current capacity (500mA AC versus 5A AC) but supports higher voltage ratings (380V AC versus 250V AC). Selection between these parts depends on the specific electrical requirements of the application circuit. Applications requiring 5A AC at 250V cannot use the SZL-VL-S-E-N-M as a direct substitute.

Environmental Protection: The SZL-VL-S-E-N-M provides IP67 waterproof rating compared to the IP64 water-resistant rating of the SZL-VL-E, offering enhanced protection in moisture-intensive environments.

Mechanical Characteristics: Both switches share identical mechanical life ratings (10,000,000 cycles) and similar operating force characteristics (900gf versus 918gf). Travel distances differ slightly but remain within comparable ranges for cross roller plunger actuators.

Frequently Asked Questions (FAQ)

Q: Can the SZL-VL-S-E-N-M directly replace the SZL-VL-E in all applications?

A: No. While both switches share the same circuit configuration (SPDT), function (On-Momentary), actuator type (cross roller plunger), and mounting style (chassis mount), the SZL-VL-S-E-N-M has significantly lower current ratings (500mA AC versus 5A AC). Substitution is only valid for applications where the circuit current does not exceed 500mA AC or 50mA DC.

Q: What are the key mechanical differences between these switches?

A: Both switches feature cross roller plunger actuators with comparable operating forces (900gf and 918gf respectively). The SZL-VL-S-E-N-M has slightly longer pretravel (0.080" versus 0.060") and differential travel (0.060" versus 0.028"), while overtravel is marginally shorter (0.138" versus 0.158"). These differences are minor and do not affect basic functional compatibility for momentary switching applications.

Q: Why does the SZL-VL-S-E-N-M have higher voltage ratings but lower current ratings?

A: Electrical ratings are independent design parameters. The SZL-VL-S-E-N-M is engineered for higher voltage applications (380V AC, 220V DC) with lower current handling capacity, while the SZL-VL-E is rated for lower voltage (250V AC, 125V DC) with higher current capacity (5A AC). Selection depends on the specific voltage and current requirements of the target application.

Q: What is the significance of the IP67 rating on the SZL-VL-S-E-N-M compared to IP64 on the SZL-VL-E?

A: IP67 provides complete dust protection and temporary immersion capability, while IP64 provides dust protection and water spray resistance. The SZL-VL-S-E-N-M is suitable for applications with direct water exposure or submersion, whereas the SZL-VL-E is limited to splash and spray environments.

Q: Are both switches available in the same packaging formats?

A: The SZL-VL-E packaging is listed as dash (not specified), while the SZL-VL-S-E-N-M is supplied in bulk packaging. Confirm packaging requirements with procurement specifications before ordering.

Q: What is the operating temperature difference between these switches?

A: The SZL-VL-E operates from -20°C to 60°C, while the SZL-VL-S-E-N-M extends the upper limit to 70°C. For applications requiring operation above 60°C, the SZL-VL-S-E-N-M provides additional thermal margin.

Q: Is the SZL-VL-S-E-N-M suitable for high-cycle applications?

A: Both switches are rated for 10,000,000 mechanical cycles. The SZL-VL-S-E-N-M additionally specifies 500,000 electrical cycles, providing defined electrical life for switching applications. The SZL-VL-E does not specify electrical life.