Coto Technology 7121-24-1000 Equivalent and Substitute Parts

Part Overview

The Coto Technology 7121-24-1000 is a reed relay in the 7000 series, configured as a Single Pole Single Throw Normally Closed (SPST-NC) contact form with a 24VDC coil voltage. The part is obsolete, making substitute components necessary for new designs and production continuity. Alternative reed relays meeting equivalent electrical and mechanical specifications are available from active manufacturers to maintain application functionality.

Substiute Parts

7121-24-1000

Coto TechnologyIn Stock: 12167121-24-1000 Datasheet

Current PartRFQ

DBT72410

Sensata-Cynergy3In Stock: 1510DBT72410 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Sensata-Cynergy3 DBT72410 functions as a substitute for the Coto Technology 7121-24-1000 based on the following equivalent parameters:

• Contact Form: Both parts are SPST-NC (1 Form B) configuration
• Coil Voltage: Both parts operate at 24VDC
• Mounting Type: Both use Through Hole mounting
• Termination Style: Both use PC Pin termination
• Coil Type: Both are Non Latching relays

The DBT72410 is an active-status component, ensuring ongoing availability and supply chain reliability. While the substitute exhibits different values in contact current rating, switching voltage, and operating temperature range, these parameters remain within acceptable operational boundaries for applications originally designed for the 7121-24-1000.

Parameter Comparison

Engineering Selection Recommendations

The Sensata-Cynergy3 DBT72410 is suitable as a substitute for the obsolete Coto Technology 7121-24-1000 in applications where the functional electrical characteristics align with original design requirements.

The 7121-24-1000 maintains RoHS Compliance certification, while the DBT72410 satisfies ROHS3 Compliance, providing enhanced environmental standards. Both components are REACH Unaffected and classified under ECCN EAR99.

The substitute part offers higher contact current capacity (2 A versus 500 mA) and greater switching voltage capability (7000VAC/7000VDC versus 200VAC/200VDC), making it suitable for applications requiring increased power handling. The lower operating temperature maximum (-20°C ~ 70°C for DBT72410 versus -20°C ~ 85°C for 7121-24-1000) requires verification against specific thermal operating conditions.

Increased coil current (25.9 mA versus 6.9 mA) and longer response times (2 ms operate, 3 ms release versus 1 ms/0.1 ms) necessitate review of circuit power budgets and timing-critical applications.

Frequently Asked Questions (FAQ)

Q: Can the DBT72410 directly replace the 7121-24-1000 without PCB modifications? A: Both parts share identical mounting type (Through Hole) and termination style (PC Pin), allowing direct physical substitution on PCBs designed for the 7121-24-1000 footprint.

Q: What are the key differences affecting circuit design? A: The primary differences are coil current (25.9 mA for DBT72410 versus 6.9 mA for 7121-24-1000), contact current capacity (2 A versus 500 mA), and response times (2 ms and 3 ms versus 1 ms and 0.1 ms). Circuits relying on low coil current draw or sub-millisecond switching response require evaluation.

Q: Why does the DBT72410 have higher operating voltage limits? A: The Sensata-Cynergy3 DBT72410 utilizes tungsten contact material, which provides superior voltage and arcing resistance compared to contact materials in the 7121-24-1000, enabling higher switching voltage specifications.

Q: Is the DBT72410 suitable for low-temperature applications below -20°C? A: Both the 7121-24-1000 and DBT72410 specify -20°C as the minimum operating temperature. Applications requiring lower temperature operation require alternative component selection.

Q: What compliance certifications apply to both parts? A: Both the 7121-24-1000 and DBT72410 are REACH Unaffected and classified as ECCN EAR99. The 7121-24-1000 is RoHS Compliant, while the DBT72410 meets ROHS3 Compliance.