CT10-1040-A2 Equivalent & Substitute Parts

Part Overview

The CT10-1040-A2 is a molded body reed switch manufactured by Coto Technology, configured as a single-pole, single-throw normally open (SPST-NO) device. This component operates within a 10 to 40 ampere-turn (AT) activation range and is rated for 500mA switching current at 140V AC or 200V DC, with a maximum power dissipation of 10W. The device features surface mount termination with axial flat leads and operates across a temperature range of -40°C to 125°C.

The CT10-1040-A2 carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

CT10-1040-A2

Coto TechnologyIn Stock: 776CT10-1040-A2 Datasheet

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CT10-1040-G2

Coto TechnologyIn Stock: 771CT10-1040-G2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CT10-1040-A2 is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Circuit configuration must remain SPST-NO
• Operate range must be 10 ~ 40 AT
• Release range must be 3 ~ 35 AT
• Switching current must be 500mA (AC/DC)
• Switching voltage AC must be 140 V
• Switching voltage DC must be 200 V
• Rated power must be 10W
• DC carry current must be 500mA
• Operating temperature range must be -40°C ~ 125°C

Mechanical Equivalence Criteria:

• Mounting type must be Surface Mount
• Base product series must be CT10
• Compliance certifications must include ROHS3 and REACH Unaffected status

The CT10-1040-G2 satisfies all electrical parameters and maintains identical compliance certifications. The primary distinction between these parts is the termination style and associated dimensional characteristics. The CT10-1040-A2 utilizes axial flat termination, while the CT10-1040-G2 employs gull wing termination. This difference affects board layout and assembly considerations but does not alter electrical performance or functional compatibility within circuits designed for the CT10 series reed switch family.

Parameter Comparison

Engineering Selection Recommendations

The CT10-1040-G2 is the direct substitute for the obsolete CT10-1040-A2. Both components are manufactured by Coto Technology within the CT10 series and maintain identical electrical specifications across all switching parameters, current ratings, voltage ratings, and power dissipation limits.

The CT10-1040-G2 carries an active product status, ensuring ongoing availability and supply chain support. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for current manufacturing and deployment.

The primary consideration for substitution is the termination style transition from axial flat leads to gull wing leads. This change requires printed circuit board layout modification to accommodate the different lead geometry and spacing. The CT10-1040-G2 exhibits a greater overall length (0.770" versus 0.614") and increased height above board (0.115" specified versus unspecified for the main part). These dimensional differences must be evaluated against available board space and assembly clearance requirements.

Selection of the CT10-1040-G2 is appropriate for new designs, redesigns, or production transitions where board layout can be adapted to accommodate gull wing termination. The electrical performance and functional behavior remain equivalent to the original CT10-1040-A2 specification.

Frequently Asked Questions (FAQ)

Q: Can the CT10-1040-G2 be used as a direct replacement for the CT10-1040-A2 in existing circuit designs?

A: The CT10-1040-G2 provides electrical equivalence and functional compatibility. However, the termination style differs (gull wing versus axial flat), requiring printed circuit board layout modification. Existing PCB designs with axial flat lead patterns cannot accommodate gull wing leads without redesign.

Q: What are the key electrical parameters that remain identical between these two parts?

A: Both parts maintain identical specifications for circuit configuration (SPST-NO), operate range (10 ~ 40 AT), release range (3 ~ 35 AT), switching current (500mA AC/DC), switching voltage (140V AC / 200V DC), rated power (10W), DC carry current (500mA), and operating temperature range (-40°C ~ 125°C).

Q: Why is the CT10-1040-A2 listed as obsolete while the CT10-1040-G2 is active?

A: Product status reflects manufacturer production and support status. The CT10-1040-G2 represents the current production variant within the CT10 series. The CT10-1040-A2 has been discontinued in favor of the gull wing termination variant.

Q: Are there dimensional constraints that would prevent using the CT10-1040-G2 in space-limited applications?

A: The CT10-1040-G2 is longer (0.770" versus 0.614") and taller above board (0.115" specified). Applications with strict height or length constraints must evaluate available clearance before substitution.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the CT10-1040-A2 and CT10-1040-G2 are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating.

Q: What is the primary reason to transition from the CT10-1040-A2 to the CT10-1040-G2?

A: The CT10-1040-A2 is obsolete and no longer manufactured. The CT10-1040-G2 is the active production equivalent within the Coto Technology CT10 series, ensuring continued supply availability and support for new and ongoing applications.