MSPS103B Equivalent & Substitute Parts

Part Overview

The MSPS103B is a pushbutton switch manufactured by TE Connectivity ALCOSWITCH Switches, classified as a Standard Panel Mount SPST-NC (Single Pole Single Throw - Normally Closed) switch with momentary on-function. This component is rated for 500mA at 125V AC and features a circular black button actuator with solder lug termination. The product is currently obsolete, making identification of equivalent substitute parts essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

MSPS103B

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1073MSPS103B Datasheet

Current PartRFQ

30-252 BLK

Grayhill Inc.In Stock: 116730-252 BLK Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MSPS103B is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Circuit configuration must remain SPST-NC
• Switch function must be On-Mom (momentary operation)
• Mounting type must be Panel Mount, Rear
• Actuator type must be Round, Button
• Termination style must be Solder Lug
• Actuator color must be Black

Allowable Parameter Variations:

• Current rating may exceed 500mA (higher current capability is acceptable)
• Voltage rating may exceed 125V AC (higher voltage capability is acceptable)
• Panel cutout diameter may vary within mechanical tolerance limits
• Operating temperature range may be wider than the original specification
• Electrical life cycle rating may exceed 10,000 cycles

The substitute part 30-252 BLK manufactured by Grayhill Inc. satisfies all critical substitution parameters while providing enhanced electrical performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The 30-252 BLK from Grayhill Inc. serves as a direct functional equivalent to the obsolete MSPS103B. Selection of this substitute is supported by the following engineering factors:

Electrical Compatibility: The 30-252 BLK maintains identical circuit configuration (SPST-NC) and switch function (On-Mom) while providing enhanced current capacity (1A versus 500mA) and equivalent voltage rating (115V AC versus 125V AC). These characteristics ensure the substitute operates within or exceeds the electrical requirements of the original design.

Mechanical Compatibility: Both switches feature identical mounting methodology (Panel Mount, Rear), actuator type (Round, Button), actuator color (Black), and termination style (Solder Lug). Panel cutout dimensions differ by 0.4mm (6.75mm versus 6.35mm), which falls within standard mechanical tolerance ranges for panel-mounted components.

Product Status and Compliance: The 30-252 BLK maintains active product status with RoHS3 compliance and REACH unaffected designation, ensuring long-term availability and regulatory alignment. The substitute demonstrates superior electrical life rating (250,000 cycles versus 10,000 cycles) and extended operating temperature range (-40°C ~ 85°C versus -20°C ~ 80°C).

Frequently Asked Questions (FAQ)

Q: Can the 30-252 BLK directly replace the MSPS103B in existing circuit designs?

A: Yes. The 30-252 BLK maintains identical circuit configuration (SPST-NC), switch function (On-Mom), mounting type (Panel Mount, Rear), actuator type (Round, Button), and termination style (Solder Lug). Electrical and mechanical parameters are compatible with the original design requirements.

Q: What is the significance of the current rating difference between the two switches?

A: The 30-252 BLK is rated for 1A AC compared to the MSPS103B's 500mA AC rating. A higher current rating indicates the substitute can safely handle greater electrical loads. This represents an enhancement rather than a limitation, provided the circuit design does not exceed the original 500mA specification.

Q: How do the panel cutout dimensions affect installation?

A: The 30-252 BLK requires a 6.75mm diameter circular cutout compared to the MSPS103B's 6.35mm diameter. This 0.4mm difference falls within standard mechanical tolerance ranges for panel-mounted switches. Existing panel cutouts may require minor enlargement to accommodate the substitute component.

Q: What advantages does the 30-252 BLK offer beyond functional equivalence?

A: The substitute provides extended operating temperature range (-40°C ~ 85°C versus -20°C ~ 80°C), significantly higher electrical life rating (250,000 cycles versus 10,000 cycles), sealed fully design for environmental protection, and active product status ensuring ongoing availability and support.

Q: Are there compliance or regulatory considerations when substituting these components?

A: The 30-252 BLK is RoHS3 compliant and REACH unaffected, meeting current regulatory standards. Both components share identical ECCN (EAR99) and HTSUS (8536.50.9031) classifications, indicating equivalent regulatory treatment for export and trade purposes.

Q: What is the moisture sensitivity level for both components?

A: Both the MSPS103B and 30-252 BLK are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage, handling, or installation.