SZL-VL-B Equivalent & Substitute Parts

Part Overview

The SZL-VL-B 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 side rotary adjustable roller actuator with IP64 ingress protection. The product is currently obsolete, necessitating identification of equivalent alternatives for ongoing maintenance and replacement requirements. The SZL-VL-B operates with a mechanical life rating of 10,000,000 cycles and is RoHS compliant.

Substiute Parts

SZL-VL-B

Honeywell Sensing and Productivity SolutionsIn Stock: 748SZL-VL-B Datasheet

Current PartRFQ

SZL-VL-S-B-N-M

Honeywell Sensing and Productivity SolutionsIn Stock: 1382SZL-VL-S-B-N-M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SZL-VL-S-B-N-M is identified as a direct substitute for the SZL-VL-B based on the following substitution criteria:

Common Electrical Architecture: Both parts maintain SPDT circuit configuration with On-Mom switch function and screw terminal termination, ensuring functional compatibility in control circuits.

Mechanical Compatibility: Both switches feature side rotary adjustable roller actuators and chassis mount design, allowing direct mechanical installation in existing mounting locations.

Environmental Protection: While the SZL-VL-B provides IP64 protection, the SZL-VL-S-B-N-M offers enhanced IP67 protection, maintaining or exceeding environmental sealing requirements.

Regulatory Compliance: Both parts are RoHS compliant with MSL 1 (Unlimited) moisture sensitivity rating and EAR99 ECCN classification.

Operational Characteristics: Both switches operate within overlapping temperature ranges (-20°C to 60°C for SZL-VL-B; -20°C to 70°C for SZL-VL-S-B-N-M) and maintain 10,000,000 cycle mechanical life ratings.

Key Substitution Limitations: The SZL-VL-S-B-N-M operates at reduced current and voltage ratings (500mA AC at 380V AC; 50mA DC at 220V DC) compared to the SZL-VL-B (5A AC at 250V AC; 400mA DC at 125V DC). Substitution is valid only in applications where load requirements do not exceed the lower electrical ratings of the substitute part.

Parameter Comparison

Engineering Selection Recommendations

Substitution Validity: The SZL-VL-S-B-N-M is a valid substitute for the obsolete SZL-VL-B in applications where electrical load requirements do not exceed 500mA AC at 380V AC or 50mA DC at 220V DC. Both parts share identical mechanical mounting interfaces, circuit topology, and regulatory compliance status.

Product Status Consideration: The SZL-VL-B is obsolete with limited inventory availability (730 pieces). The SZL-VL-S-B-N-M is active production with higher inventory levels (1282 pieces), ensuring long-term supply chain continuity.

Environmental Protection Enhancement: The SZL-VL-S-B-N-M provides IP67 waterproof protection compared to the SZL-VL-B's IP64 dust-tight, water-resistant rating. This represents an improvement in environmental sealing capability.

Compliance Status: Both parts maintain RoHS compliance and unlimited moisture sensitivity rating (MSL 1), supporting deployment in regulated manufacturing environments.

Temperature Operating Range: The SZL-VL-S-B-N-M extends the upper operating temperature limit to 70°C compared to the SZL-VL-B's 60°C maximum, providing additional thermal margin in elevated ambient conditions.

Load Derating Requirement: Applications currently operating the SZL-VL-B at or near its 5A AC rating cannot directly substitute the SZL-VL-S-B-N-M without circuit redesign to accommodate the 500mA AC maximum rating.

Frequently Asked Questions (FAQ)

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

A: Direct mechanical and electrical replacement is valid only in applications where the load current does not exceed 500mA AC at 380V AC or 50mA DC at 220V DC. Applications requiring the full 5A AC rating of the SZL-VL-B require alternative solutions.

Q: What are the key differences in electrical ratings between these parts?

A: The SZL-VL-B is rated for 5A AC at 250V and 400mA DC at 125V. The SZL-VL-S-B-N-M is rated for 500mA AC at 380V and 50mA DC at 220V. The substitute part operates at significantly lower current levels but higher voltage ratings.

Q: Are the mounting interfaces identical?

A: Both parts feature chassis mount design with screw terminal connections. Mechanical installation compatibility is confirmed for direct substitution.

Q: What is the difference in ingress protection ratings?

A: The SZL-VL-B provides IP64 protection (dust tight, water resistant). The SZL-VL-S-B-N-M provides IP67 protection (dust tight, waterproof). The substitute offers enhanced environmental sealing.

Q: How do the mechanical life ratings compare?

A: Both parts are rated for 10,000,000 mechanical cycles. The SZL-VL-S-B-N-M additionally specifies 500,000 electrical life cycles.

Q: What is the packaging difference?

A: The SZL-VL-B is supplied in standard packaging. The SZL-VL-S-B-N-M is supplied in bulk packaging, which may affect procurement and handling procedures.

Q: Are both parts RoHS compliant?

A: Both the SZL-VL-B and SZL-VL-S-B-N-M are RoHS compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the temperature operating range difference?

A: The SZL-VL-B operates from -20°C to 60°C. The SZL-VL-S-B-N-M operates from -20°C to 70°C, providing 10°C additional upper temperature margin.