SW249CD7 Toggle Switch DPDT Equivalent & Substitute Parts

Part Overview

The SW249CD7 is an active DPDT toggle switch manufactured by APEM Inc., designed for through-hole, right-angle mounting applications. This switch operates at 0.4VA with voltage ratings of 20V AC/DC and features a sealed design with 50,000 electrical life cycles. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical specifications, mechanical mounting compatibility, and functional equivalence in DPDT switching applications.

Substiute Parts

SW249CD7

APEM Inc.In Stock: 1100SW249CD7 Datasheet

Current PartRFQ

7203MD9ABE

C&KIn Stock: 11137203MD9ABE Datasheet

SimilarRFQ

E203MD1ABE

C&KIn Stock: 1225E203MD1ABE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SW249CD7 are qualified based on the following critical parameters:

• Electrical Equivalence: Identical DPDT circuit configuration with On-Off-On switching function
• Voltage and Current Ratings: Matching 0.4VA at 20V AC/DC specifications
• Mechanical Compatibility: Through-hole, right-angle mounting with PC pin termination
• Actuator Configuration: Standard round actuator type for form-factor compatibility
• Compliance Status: ROHS3 compliance and active product status

The substitute parts 7203MD9ABE and E203MD1ABE meet these core substitution criteria. Variations in actuator length, electrical life cycles, and operating temperature ranges represent acceptable engineering tolerances within the DPDT toggle switch category.

Parameter Comparison

Engineering Selection Recommendations

SW249CD7 (APEM Inc.): Primary selection for standard DPDT toggle switch applications. Active product status with ROHS3 compliance. Highest electrical life rating at 50,000 cycles. Suitable for general-purpose switching in the specified voltage and current range.

7203MD9ABE (C&K): Qualified substitute with extended operating temperature range (-30°C to 85°C). Tray packaging format. ROHS3 compliant. Electrical life of 40,000 cycles is acceptable for most applications within the 0.4VA/20V specification. REACH status affected.

E203MD1ABE (C&K): Qualified substitute with IP57 ingress protection rating, providing dust and waterproof sealing. Extended operating temperature range (-30°C to 85°C). Bulk packaging matches SW249CD7 format. ROHS3 compliant. Electrical life of 40,000 cycles. REACH status affected. Recommended for applications requiring enhanced environmental protection.

All three parts maintain electrical and mechanical compatibility as DPDT toggle switches with identical voltage/current ratings and through-hole right-angle mounting.

Frequently Asked Questions (FAQ)

Q: Can 7203MD9ABE replace SW249CD7 in existing designs? A: Yes. Both parts share identical DPDT circuit configuration, 0.4VA/20V ratings, through-hole right-angle mounting, and PC pin termination. The 6.86mm actuator length of 7203MD9ABE is within acceptable mechanical tolerance for standard toggle switch applications. Verify panel cutout compatibility in your specific assembly.

Q: What is the primary difference between 7203MD9ABE and E203MD1ABE? A: E203MD1ABE includes IP57 ingress protection (dust protected, waterproof), making it suitable for applications requiring environmental sealing. Both are C&K manufactured DPDT switches with identical electrical specifications. 7203MD9ABE is supplied in tray packaging; E203MD1ABE is supplied in bulk packaging.

Q: Does the 40,000-cycle electrical life of substitute parts affect reliability? A: The substitute parts (7203MD9ABE and E203MD1ABE) are rated for 40,000 electrical cycles compared to SW249CD7's 50,000 cycles. This represents a 20% difference in rated life. Selection depends on application duty cycle requirements. Both ratings exceed typical low-signal switching applications.

Q: Are all three parts RoHS3 compliant? A: Yes. SW249CD7, 7203MD9ABE, and E203MD1ABE are all ROHS3 compliant. Moisture sensitivity level is 1 (unlimited) for all three parts, indicating no special handling requirements during storage or assembly.

Q: What packaging considerations apply to these substitutes? A: SW249CD7 and E203MD1ABE are supplied in bulk packaging. 7203MD9ABE is supplied in tray packaging. Verify packaging format compatibility with your procurement and assembly processes.

Q: Can E203MD1ABE be used in non-sealed applications? A: Yes. E203MD1ABE's IP57 rating provides enhanced protection but does not restrict use in standard applications. It is a direct functional equivalent for all DPDT switching requirements of SW249CD7.