Coto Technology 3502-12-811 Reed Relay Equivalent & Substitute Parts

Part Overview

The Coto Technology 3502-12-811 is a hermetically sealed reed relay with DPST-NO contact configuration rated for 500 mA switching at 12 VDC coil voltage. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives from current production lines. The 3502 series represents legacy relay technology; substitute parts maintain electrical and mechanical compatibility while offering active product status and improved availability.

Substiute Parts

3502-12-811

Coto TechnologyIn Stock: 8113502-12-811 Datasheet

Current PartRFQ

2332-12-000

Coto TechnologyIn Stock: 25752332-12-000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3502-12-811 are identified based on strict electrical and mechanical parameter matching. The following parameters determine substitution eligibility:

Critical Matching Parameters:

• Contact configuration: DPST-NO (2 Form A)
• Current rating: 500 mA
• Coil voltage: 12 VDC
• Maximum switching voltage: 200 VAC, 200 VDC
• Mounting type: Through Hole
• Termination style: PC Pin
• Hermetic seal requirement

Important Matching Parameters:

• Operating temperature range: -20°C ~ 85°C
• Must operate voltage: 9 VDC minimum
• Must release voltage: 1 VDC maximum
• Non-latching coil type

Compliance Parameters:

• RoHS compliance status
• REACH compliance status

The Coto Technology 2332-12-000 satisfies all critical, important, and compliance parameters, establishing it as a direct functional equivalent despite differences in coil current and timing characteristics.

Parameter Comparison

Engineering Selection Recommendations

The Coto Technology 2332-12-000 is the qualified substitute for the obsolete 3502-12-811 based on the following engineering criteria:

Electrical Compatibility: Both relays maintain identical contact configuration (DPST-NO), current rating (500 mA), coil voltage (12 VDC), and switching voltage limits (200 VAC/200 VDC). Voltage thresholds for operation and release are identical, ensuring circuit-level compatibility.

Mechanical Compatibility: Both components feature through-hole mounting with PC pin termination, enabling direct PCB footprint compatibility. Hermetic sealing is maintained in both designs.

Operational Parameters: While coil current, coil resistance, and switching times differ between the two relays, these differences do not preclude substitution. The 2332-12-000 operates faster (0.5 ms vs. 0.75 ms) and requires higher coil current (12 mA vs. 6 mA), representing improved performance characteristics within the same functional class.

Compliance Status: The 2332-12-000 carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The substitute part is in active production, ensuring long-term availability and supply chain stability.

Product Status Advantage: The transition from obsolete (3502-12-811) to active (2332-12-000) status eliminates end-of-life supply constraints and provides access to current manufacturing quality standards.

Frequently Asked Questions (FAQ)

Q: Can the 2332-12-000 be used as a direct replacement for the 3502-12-811 in existing designs?

A: Yes. Both relays share identical contact configuration, current rating, coil voltage, switching voltage limits, mounting type, and termination style. The 2332-12-000 is electrically and mechanically compatible for direct substitution in through-hole PCB applications.

Q: What are the differences between these two relays?

A: The primary differences are coil current (6 mA vs. 12 mA), coil resistance (2 kOhms vs. 1 kOhms), and switching times (operate time 0.75 ms vs. 0.5 ms; release time 0.1 ms vs. 0.15 ms). The 2332-12-000 exhibits faster operation and higher coil current draw. These differences do not affect functional substitution for standard relay applications.

Q: Does the higher coil current of the 2332-12-000 affect circuit design?

A: The 2332-12-000 requires 12 mA coil current compared to 6 mA for the 3502-12-811. Circuit designs must accommodate this increased current draw in the coil drive circuit. This is a design consideration but does not prevent substitution; it requires verification that the coil drive circuit can supply the higher current.

Q: Are both relays RoHS compliant?

A: Yes. The 3502-12-811 is RoHS Compliant, and the 2332-12-000 is ROHS3 Compliant. Both meet RoHS requirements. The 2332-12-000 meets the more recent ROHS3 standard.

Q: What is the packaging difference between these parts?

A: The 3502-12-811 is supplied in standard packaging (not specified), while the 2332-12-000 is supplied in Tray packaging. Both are through-hole components suitable for PCB assembly.

Q: Why is the 3502-12-811 obsolete?

A: The 3502-12-811 is classified as obsolete, indicating it is no longer in active production. The 2332-12-000 represents the current production equivalent from Coto Technology, ensuring ongoing availability and supply chain continuity.

Q: Are the operating temperature ranges identical?

A: Yes. Both relays operate across the identical temperature range of -20°C to 85°C, ensuring thermal compatibility in the same applications.

Q: Do both relays have hermetic sealing?

A: Yes. Both the 3502-12-811 and 2332-12-000 feature hermetically sealed construction, providing protection against moisture and environmental contamination.