MS22BSA40 Equivalent & Substitute Parts

Part Overview

The MS22BSA40 is a slide switch DPDT (Double Pole Double Throw) manufactured by NKK Switches, rated for 6A at 125V AC with non-shorting contact timing. This component features through-hole, right-angle vertical mounting with PC pin termination and gold-plated silver alloy contacts. The product is currently obsolete, making equivalent substitutes necessary for ongoing applications and new designs requiring similar electrical and mechanical characteristics.

Substiute Parts

MS22BSA40

NKK SwitchesIn Stock: 822MS22BSA40 Datasheet

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1201M2S4AV2BE2

C&KIn Stock: 10991201M2S4AV2BE2 Datasheet

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1201M2S5AV2BE2

C&KIn Stock: 8331201M2S5AV2BE2 Datasheet

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1201M2S5AV2PE2

C&KIn Stock: 8631201M2S5AV2PE2 Datasheet

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48ASDP1S1M7QBT

Grayhill Inc.In Stock: 82148ASDP1S1M7QBT Datasheet

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48ASDP1S1M7RBT

Grayhill Inc.In Stock: 72648ASDP1S1M7RBT Datasheet

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500SDP1S1M7QEA

E-SwitchIn Stock: 1284500SDP1S1M7QEA Datasheet

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500SDP1S1M7REA

E-SwitchIn Stock: 829500SDP1S1M7REA Datasheet

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500SDP1S2M7QEA

E-SwitchIn Stock: 935500SDP1S2M7QEA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MS22BSA40 is determined by the following critical parameters:

Primary Substitution Criteria:

• Circuit configuration: DPDT
• Switch function: On-On
• Mounting type: Through Hole, Right Angle, Vertical
• Termination style: PC Pin
• Contact finish: Gold
• Operating temperature range: -30°C minimum, 85°C maximum
• RoHS compliance: ROHS3 or equivalent

Secondary Compatibility Factors:

• Current rating: 5A or higher (AC/DC)
• Voltage rating: 120V or higher (AC)
• Mechanical life: 30,000 cycles or higher
• Electrical life: 25,000 cycles or higher

Substitute parts are grouped into two categories based on electrical performance alignment with the original MS22BSA40 specification.

Parameter Comparison

Engineering Selection Recommendations

High-Performance Substitutes (Recommended for Direct Replacement):

The 500SDP1S1M7QEA and 500SDP1S2M7QEA from E-Switch provide the closest electrical alignment to the MS22BSA40. Both parts maintain 5A current rating at 120V AC, matching the original specification within acceptable tolerances. These components are active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The 500SDP1S1M7QEA features a 4.72mm actuator length, while the 500SDP1S2M7QEA provides a 6.88mm actuator length for applications requiring different actuation geometry.

Alternative Substitutes (Conditional Use):

The 48ASDP1S1M7QBT from Grayhill Inc. offers 5A at 125V AC, directly matching the original voltage specification. This part maintains the full operating temperature range (-30°C to 85°C) and is actively manufactured with RoHS compliance. However, the silver contact finish differs from the original gold finish, which may affect performance in specific low-signal applications.

Limited-Application Substitutes:

The C&K 1201M2S5AV2PE2 and 1201M2S5AV2BE2 are suitable only for applications where current and voltage requirements are significantly reduced (0.4VA at 20V). These parts are not recommended for direct replacement in circuits designed for the original 6A/125V specification. The reduced operating temperature maximum (65°C versus 85°C) further limits their applicability.

Frequently Asked Questions (FAQ)

Q: Can the 500SDP1S1M7QEA directly replace the MS22BSA40 in my circuit?

A: Yes, the 500SDP1S1M7QEA is suitable for direct replacement in applications operating at or below 5A and 120V AC. The DPDT configuration, On-On function, through-hole vertical mounting, and PC pin termination are identical. The primary difference is the actuator length (4.72mm versus 5.10mm), which may require PCB layout adjustment.

Q: What is the difference between the 500SDP1S1M7QEA and 500SDP1S2M7QEA?

A: Both parts are electrically identical (5A, 120V AC, DPDT, On-On). The difference is actuator length: the S1 variant is 4.72mm, and the S2 variant is 6.88mm. Select based on your PCB clearance and actuation force requirements.

Q: Why are the C&K 1201M2S5 series not recommended as primary substitutes?

A: The C&K parts are rated for only 0.4VA at 20V, which is significantly lower than the MS22BSA40 specification of 6A at 125V. These parts are suitable only for low-power signal switching applications. Additionally, the maximum operating temperature is limited to 65°C, compared to 85°C for the original part.

Q: Are all substitute parts RoHS compliant?

A: Yes, all listed substitute parts carry either ROHS3 or RoHS compliance certification, ensuring regulatory alignment with current environmental standards.

Q: What is the impact of contact material differences (Silver Alloy versus Copper Alloy)?

A: The MS22BSA40 uses silver alloy contacts with gold finish, while most substitutes use copper alloy with silver or gold finish. For standard switching applications at rated current and voltage, this difference is not significant. For low-signal or high-reliability applications, the original silver alloy contact material may provide superior performance.

Q: Can I use the 48ASDP1S1M7QBT as a substitute despite the silver contact finish?

A: Yes, the 48ASDP1S1M7QBT is electrically compatible (5A, 125V AC, DPDT, On-On) and maintains the full operating temperature range. The silver contact finish is suitable for standard switching applications. Use this part when the exact voltage specification (125V) is critical to your design.

Q: What packaging options are available for the substitute parts?

A: E-Switch 500 series parts are supplied in bulk packaging. C&K 1201M2S5AV2PE2 is supplied in bulk, while 1201M2S5AV2BE2 is supplied in trays. Grayhill 48ASDP1S1M7QBT is supplied in bulk. Confirm packaging requirements with your procurement process.