Equivalent & Substitute Parts for Coto Technology 9081-12-00

Part Overview

The Coto Technology 9081-12-00 is a reed relay with SPST-NO contact configuration rated for 500 mA at 12 VDC coil voltage. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement. The 9081-12-00 belongs to the 9000 Spartan series and features through-hole PC pin termination suitable for printed circuit board assembly.

Substiute Parts

9081-12-00

Coto TechnologyIn Stock: 11319081-12-00 Datasheet

Current PartRFQ

HE3321A1200

Littelfuse Inc.In Stock: 7630HE3321A1200 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9081-12-00 is determined by matching the following critical electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Coil voltage: 12 VDC
• Contact form: SPST-NO (1 Form A)
• Contact current rating: 500 mA minimum
• Switching voltage: 200 VDC minimum
• Must operate voltage: 9 VDC
• Must release voltage: 1 VDC
• Coil type: Non Latching

Mechanical Compatibility Requirements:

• Mounting type: Through Hole
• Termination style: PC Pin

Regulatory Compliance:

• RoHS compliance required
• REACH unaffected status

The Littelfuse HE3321A1200 satisfies all critical substitution criteria and is classified as an active product with current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse HE3321A1200 is a direct functional substitute for the obsolete Coto Technology 9081-12-00. Both components share identical electrical specifications for coil voltage, contact configuration, current rating, and operating voltage thresholds. The substitute maintains through-hole PC pin termination and meets all regulatory requirements including RoHS3 compliance and REACH unaffected status.

The HE3321A1200 offers extended operating temperature range (-40°C to 85°C versus -20°C to 85°C) and active product status with current manufacturing availability. The substitute exhibits slightly longer switching times (1 ms operate and release versus 0.5 ms and 0.2 ms respectively) and higher coil current draw (24 mA versus 12 mA), which are acceptable variations for most applications utilizing 12 VDC reed relay switching at 500 mA contact ratings.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse HE3321A1200 directly replace the Coto 9081-12-00 in existing designs?

A: Yes. Both relays share identical coil voltage (12 VDC), contact form (SPST-NO), current rating (500 mA), operating voltage thresholds, and through-hole PC pin termination. The substitute is mechanically and electrically compatible for direct board-level substitution.

Q: What are the differences in switching performance between these two relays?

A: The Littelfuse HE3321A1200 has longer switching times: 1 ms operate time and 1 ms release time compared to 0.5 ms and 0.2 ms for the Coto 9081-12-00. Applications requiring faster switching response should evaluate this difference against circuit timing requirements.

Q: Does the higher coil current of the HE3321A1200 affect circuit design?

A: The substitute draws 24 mA coil current versus 12 mA for the original part. Circuit designs must accommodate this increased current draw in the coil drive circuit. The lower coil resistance (500 Ohms versus 1 kOhms) reflects this higher current requirement.

Q: Are there packaging differences between these parts?

A: The Littelfuse HE3321A1200 is supplied in tube packaging. The original Coto part packaging specification was not provided. Verify packaging requirements for your procurement and assembly processes.

Q: What is the temperature operating range difference?

A: The Littelfuse substitute operates from -40°C to 85°C, providing a 20°C lower temperature limit compared to the Coto part at -20°C to 85°C. This extended range offers additional design margin for low-temperature applications.

Q: Are both parts RoHS compliant?

A: Yes. The Coto 9081-12-00 is RoHS Compliant, and the Littelfuse HE3321A1200 is ROHS3 Compliant. Both meet current RoHS requirements and are REACH unaffected.