Equivalent & Substitute Parts for 1SM33-H2 Snap Action Switch

Part Overview

The 1SM33-H2 is a snap action SPDT (Single Pole Double Throw) switch manufactured by Honeywell Sensing and Productivity Solutions. This through-hole mounted component is rated for 5A at 250V AC and 30V DC, featuring a round pin plunger actuator with on-momentary switching function. The product is currently obsolete, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing circuit designs and mechanical mounting requirements.

Substiute Parts

1SM33-H2

Honeywell Sensing and Productivity SolutionsIn Stock: 9661SM33-H2 Datasheet

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ABS1510519

Panasonic Electric WorksIn Stock: 725ABS1510519 Datasheet

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MBZ101A01C02X02

APEM Inc.In Stock: 707MBZ101A01C02X02 Datasheet

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MWZ101C01C01X02

APEM Inc.In Stock: 1059MWZ101C01C01X02 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1SM33-H2 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Mom (momentary)
• Actuator type must be Round (Pin Plunger)
• Mounting type must be Through Hole
• Termination style must be PC Pin
• Current and voltage ratings must meet or exceed application requirements

Secondary Compatibility Considerations:

• Operating position tolerance (0.330" ± acceptable variance)
• Operating temperature range must encompass application environment
• Mechanical life cycle rating must support intended duty cycle
• RoHS compliance status for regulatory alignment

The three substitute parts identified (MBZ101A01C02X02, ABS1510519, MWZ101C01C01X02) share the core SPDT momentary switching architecture with round pin plunger actuation and through-hole PC pin termination. However, each presents distinct electrical and environmental performance characteristics that determine suitability for specific application contexts.

Parameter Comparison

Engineering Selection Recommendations

MBZ101A01C02X02 (APEM Inc.) - Primary Substitute for High-Current AC Applications

This substitute is suitable when the application requires AC current operation at or above 5A with 250V AC rating. The MBZ101A01C02X02 provides 10A AC capacity, exceeding the original 5A specification. Operating position and pretravel characteristics align with the 1SM33-H2. The component is active in production with ROHS3 compliance. However, this substitute lacks DC voltage rating specification and operates within a narrower temperature range (-40°C to 85°C versus -55°C to 125°C). Mechanical life rating of 10,000,000 cycles substantially exceeds the original 80,000 cycles.

MWZ101C01C01X02 (APEM Inc.) - Substitute for Environmentally Protected Applications

This substitute is appropriate for applications requiring IP67 ingress protection (dust tight, waterproof) with 5A AC at 125V AC. The MWZ101C01C01X02 maintains the 5A current rating and similar operating force (153gf) to the original part. Operating position variance is minimal (0.325" versus 0.330"). The component is active with ROHS3 compliance. This substitute is limited to AC operation and 125V AC rating, with reduced temperature range and mechanical life (1,000,000 cycles) compared to the original specification.

ABS1510519 (Panasonic Electric Works) - Substitute for Low-Current Applications

This substitute is applicable only when circuit requirements are limited to 100mA maximum current. The ABS1510519 provides SPDT momentary switching with 125V AC and 30V DC ratings. Operating position matches the original (0.330"), and the component is active with RoHS compliance. This substitute is unsuitable for applications requiring the full 5A capacity of the 1SM33-H2. Mechanical life rating of 5,000,000 cycles exceeds the original specification.

Compliance and Regulatory Status

All three substitute parts maintain RoHS compliance (either RoHS or ROHS3 standard). The APEM components carry REACH Unaffected designation. All parts share EAR99 ECCN classification and identical HTSUS code (8536.50.7000) with the original part, supporting regulatory continuity.

Frequently Asked Questions (FAQ)

Q: Can the MBZ101A01C02X02 directly replace the 1SM33-H2 in all applications?

A: The MBZ101A01C02X02 is suitable for AC-only applications at 250V and 5A or higher current requirements. It is not suitable for applications requiring DC voltage operation, as this substitute lacks DC rating specification. Additionally, the narrower operating temperature range (-40°C to 85°C) may not accommodate applications requiring the original -55°C to 125°C range.

Q: Why is the ABS1510519 listed as a substitute if it only handles 100mA?

A: The ABS1510519 is included as a substitute option for applications where circuit current requirements do not exceed 100mA. It provides the same SPDT momentary switching architecture and through-hole PC pin termination. For applications requiring the full 5A capacity of the 1SM33-H2, this substitute is not appropriate.

Q: What is the significance of the operating position variance between these parts?

A: Operating position defines the plunger travel distance at which the switch actuates. The 1SM33-H2 specifies 0.330" (8.4mm). The MWZ101C01C01X02 operates at 0.325" (8.25mm), a 0.005" variance. This minor difference may affect mechanical fit in applications with tight plunger clearance tolerances. Verify mechanical compatibility with the application enclosure or actuating mechanism before substitution.

Q: Are all substitute parts available in the same packaging as the original?

A: No. The 1SM33-H2 is packaged in standard format (packaging not specified in original data). The MBZ101A01C02X02 is supplied in Tray packaging, the MWZ101C01C01X02 in Bulk, and the ABS1510519 in Bulk. Packaging differences may affect procurement, handling, and assembly processes. Verify packaging compatibility with your supply chain and assembly requirements.

Q: Which substitute offers the best mechanical durability?

A: The MBZ101A01C02X02 provides the highest mechanical life rating at 10,000,000 cycles, compared to the original 80,000 cycles. The ABS1510519 offers 5,000,000 cycles, and the MWZ101C01C01X02 provides 1,000,000 cycles. Selection should align with the intended duty cycle frequency and expected product lifetime.

Q: Can the MWZ101C01C01X02 be used in non-waterproof applications?

A: Yes. The MWZ101C01C01X02 provides IP67 ingress protection, which exceeds typical through-hole switch requirements. This enhanced protection does not prevent use in standard (non-waterproof) applications. However, the 125V AC rating and lack of DC specification limit its applicability compared to the original 250V AC / 30V DC dual-voltage design.

Q: What is the impact of operating force differences on substitution?

A: Operating force determines the mechanical pressure required to actuate the switch. The 1SM33-H2 requires 141gf. Substitutes range from 150gf (ABS1510519, MWZ101C01C01X02) to 285gf (MBZ101A01C02X02). Higher operating force may require greater actuator pressure or different mechanical linkage design. Verify that the application's actuating mechanism can provide sufficient force for the selected substitute.