Coto Technology 9081C1-24-10 Equivalent & Substitute Parts

Part Overview

The Coto Technology 9081C1-24-10 is a reed relay with SPDT contact form rated for 400 mA at 24VDC coil voltage. This component belongs to the Coto 9000 Spartan series and is classified as obsolete. The obsolete status necessitates identification of active substitute components that maintain functional compatibility for applications requiring SPDT reed relay switching at 24VDC with equivalent electrical ratings.

Substiute Parts

9081C1-24-10

Coto TechnologyIn Stock: 9589081C1-24-10 Datasheet

Current PartRFQ

HE3321C2400

Littelfuse Inc.In Stock: 7347HE3321C2400 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the 9081C1-24-10 is based on the following critical electrical and mechanical parameters:

• Coil Voltage: 24VDC (primary selection criterion)
• Contact Form: SPDT (1 Form C) configuration
• Coil Type: Non Latching operation
• Termination Style: PC Pin through-hole mounting
• Coil Current: 12 mA
• Coil Resistance: 2 kOhms
• Must Operate Voltage: 18 VDC minimum
• Must Release Voltage: 2 VDC maximum

The Littelfuse HE3321C2400 meets all mandatory electrical parameters for substitution. While the contact current rating differs (250 mA versus 400 mA), this represents a derating that maintains functional compatibility for applications not requiring the full 400 mA current capacity. The substitute shares identical coil specifications, switching voltage maximum, and operational voltage thresholds.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse HE3321C2400 is classified as Active product status, providing ongoing supply continuity and manufacturer support compared to the obsolete 9081C1-24-10. Both components meet RoHS and REACH compliance requirements. The HE3321C2400 maintains ROHS3 compliance and extends the operating temperature range to -40°C, providing additional environmental margin.

The primary design consideration is the contact current rating differential: the substitute is rated for 250 mA versus the original 400 mA specification. Selection of the HE3321C2400 requires confirmation that the application load current does not exceed 250 mA. Applications operating at or below 250 mA contact current are fully compatible with the substitute component.

Timing parameters differ slightly: the HE3321C2400 operates at 3 ms versus 1 ms for the original, and releases at 3 ms versus 1.5 ms. Applications with time-critical switching requirements must account for this 2 ms increase in switching response.

Frequently Asked Questions (FAQ)

Q: Can the HE3321C2400 directly replace the 9081C1-24-10? A: Direct pin-for-pin replacement is supported for applications where contact current does not exceed 250 mA. Mechanical mounting is identical (through-hole PC pin termination). Electrical coil specifications and voltage thresholds are equivalent.

Q: What is the impact of the 250 mA versus 400 mA current rating difference? A: The substitute component is rated for a lower maximum contact current. Applications must operate within the 250 mA limitation. If the original design requires switching currents above 250 mA, the HE3321C2400 is not suitable.

Q: How do the timing differences affect circuit performance? A: The HE3321C2400 introduces a 2 ms increase in operate and release times compared to the original part. Applications with timing-sensitive logic, such as pulse-width modulation or high-frequency switching, must account for the slower response characteristic.

Q: Are both components RoHS compliant? A: The 9081C1-24-10 meets RoHS compliance. The HE3321C2400 meets the more current ROHS3 standard. Both satisfy regulatory requirements for restricted substance management.

Q: What is the temperature operating range consideration? A: The 9081C1-24-10 operates from -20°C to 85°C. The HE3321C2400 extends the lower limit to -40°C. Applications operating in cold environments benefit from the expanded temperature range of the substitute.

Q: Are packaging differences a concern? A: The 9081C1-24-10 is supplied in standard inventory packaging. The HE3321C2400 is packaged in tube format. Component density and handling procedures may differ, but electrical and mechanical compatibility remains unchanged.