APEM Inc. 305SCQE Pushbutton Switch - Equivalent & Substitute Parts

Part Overview

The APEM Inc. 305SCQE is a SPST-NO (Single Pole Single Throw - Normally Open) pushbutton switch rated for 1A at 125V AC and 28V DC. This component features a standard panel mount configuration with rear termination via PC pins and is designed for momentary (Off-Mom) operation. The 305SCQE is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system maintenance and new design implementations where this functionality is required.

Substiute Parts

305SCQE

APEM Inc.In Stock: 925305SCQE Datasheet

Current PartRFQ

301SCBE

APEM Inc.In Stock: 1135301SCBE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 305SCQE is determined by strict alignment of the following critical parameters:

• Circuit Configuration: Both parts must maintain SPST-NO topology
• Switch Function: Both parts must support Off-Mom (momentary) operation
• Mounting Type: Both parts must support Panel Mount, Rear configuration
• Actuator Type: Both parts must feature Round, Plunger actuator design
• Panel Cutout Dimensions: Both parts must accommodate Circular - 6.35mm Dia cutout
• Termination Style: Both parts must use PC Pin termination
• Operating Temperature Range: Substitute must cover or exceed -30°C ~ 85°C
• Electrical Life: Substitute must meet or exceed 250,000 Cycles
• RoHS Compliance: Substitute must maintain ROHS3 Compliant status

The APEM Inc. 301SCBE qualifies as a substitute part based on these parameters. However, the 301SCBE operates at reduced electrical ratings (0.4VA at 20V AC/DC versus 1A at 125V AC / 28V DC for the 305SCQE). This reduced rating must be evaluated against the specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The 301SCBE is the identified substitute for the obsolete 305SCQE within the APEM Inc. 300 series. Both components maintain identical mechanical form factors, circuit topology, and environmental specifications. The primary distinction is the electrical rating differential: the 301SCBE operates at 0.4VA / 20V AC/DC compared to the 305SCQE's 1A / 125V AC and 28V DC.

Selection of the 301SCBE is appropriate for applications operating within its electrical envelope (0.4VA maximum, 20V maximum). The 301SCBE maintains active product status and full ROHS3 compliance, ensuring continued availability and regulatory alignment. For applications requiring the higher electrical ratings of the original 305SCQE, alternative solutions outside the 300 series must be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the 301SCBE directly replace the 305SCQE in all applications?

A: The 301SCBE is mechanically and functionally compatible with the 305SCQE. However, the 301SCBE is rated for 0.4VA at 20V AC/DC, while the 305SCQE is rated for 1A at 125V AC and 28V DC. Substitution is valid only when the application operates within the 301SCBE's electrical specifications.

Q: What are the key compatibility criteria for substituting the 305SCQE?

A: Substitute parts must maintain SPST-NO circuit configuration, Off-Mom switch function, Panel Mount Rear mounting, Round Plunger actuator, 6.35mm circular panel cutout, PC Pin termination, -30°C to 85°C operating temperature range, and 250,000 cycle electrical life minimum.

Q: Why is the 305SCQE listed as obsolete?

A: The 305SCQE is classified as obsolete by APEM Inc. The 301SCBE represents the current active equivalent within the 300 series product line.

Q: Are there packaging differences between the 305SCQE and 301SCBE?

A: The 305SCQE is supplied in standard packaging, while the 301SCBE is supplied in bulk packaging. Both components are identical in form factor and mechanical dimensions.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 305SCQE and 301SCBE are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8536.50.9031.