Equivalent & Substitute Parts for Coto Technology 3502-12-511

Part Overview

The Coto Technology 3502-12-511 is a reed relay with DPST-NO contact configuration rated for 500 mA at 12VDC coil voltage. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs. The part operates across a temperature range of -20°C to 85°C with hermetically sealed construction and is RoHS compliant.

Key Parameters

Parameter	Value
Coil Voltage	12VDC
Contact Form	DPST-NO (2 Form A)
Contact Rating (Current)	500 mA
Switching Voltage	200VAC, 200VDC - Max
Mounting Type	Through Hole
Termination Style	PC Pin
Seal Rating	Sealed - Hermetically
Operating Temperature	-20°C ~ 85°C
Coil Type	Non Latching

Substitute Part Grouping Explanation

Substitution of the 3502-12-511 is based on electrical and mechanical compatibility across the following critical parameters:

Coil Voltage: 12VDC (must match exactly)
Contact Form: DPST-NO (2 Form A) configuration (must match exactly)
Contact Rating: 500 mA minimum (equal or greater acceptable)
Switching Voltage: 200VAC, 200VDC maximum (must meet or exceed)
Mounting Type: Through Hole (must match exactly)
Termination Style: PC Pin (must match exactly)
Seal Rating: Hermetically sealed (must match exactly)
Operating Temperature Range: -20°C ~ 85°C (must encompass or match)
Coil Type: Non Latching (must match exactly)

The Coto Technology 2332-12-000 satisfies all substitution criteria and is classified as an active product, providing long-term availability and support.

Parameter Comparison

Parameter	3502-12-511 (Main Part)	2332-12-000 (Substitute)	Compatibility
Manufacturer	Coto Technology	Coto Technology	Match
Coil Voltage	12VDC	12VDC	Match
Contact Form	DPST-NO (2 Form A)	DPST-NO (2 Form A)	Match
Contact Rating (Current)	500 mA	500 mA	Match
Switching Voltage	200VAC, 200VDC - Max	200VAC, 200VDC - Max	Match
Coil Current	6 mA	12 mA	Substitute draws higher current
Coil Resistance	2 kOhms	1 kOhms	Substitute has lower resistance
Mounting Type	Through Hole	Through Hole	Match
Termination Style	PC Pin	PC Pin	Match
Seal Rating	Sealed - Hermetically	Sealed - Hermetically	Match
Operating Temperature	-20°C ~ 85°C	-20°C ~ 85°C	Match
Coil Type	Non Latching	Non Latching	Match
Must Operate Voltage	9 VDC	9 VDC	Match
Must Release Voltage	1 VDC	1 VDC	Match
Operate Time	0.75 ms	0.5 ms	Substitute operates faster
Release Time	0.1 ms	0.15 ms	Substitute releases slightly slower
Product Status	Obsolete	Active	Substitute is actively manufactured
RoHS Status	RoHS Compliant	ROHS3 Compliant	Both compliant
REACH Status	REACH Unaffected	REACH Unaffected	Match

Engineering Selection Recommendations

The Coto Technology 2332-12-000 is the qualified substitute for the obsolete 3502-12-511. Selection is based on the following engineering criteria:

Product Status: The 2332-12-000 is classified as active, ensuring continued manufacturing availability and supply chain stability. The 3502-12-511 is obsolete and subject to discontinuation.

Electrical Compatibility: Both parts maintain identical coil voltage (12VDC), contact form (DPST-NO), contact rating (500 mA), and switching voltage specifications (200VAC, 200VDC maximum). Operational thresholds for must-operate and must-release voltages are identical.

Mechanical Compatibility: Both parts feature through-hole mounting with PC pin termination and hermetically sealed construction. Operating temperature ranges are identical (-20°C to 85°C).

Regulatory Compliance: Both parts are RoHS compliant and REACH unaffected. The 2332-12-000 meets ROHS3 specifications, representing current compliance standards.

Performance Differences: The 2332-12-000 exhibits faster operate time (0.5 ms versus 0.75 ms) and slightly increased coil current draw (12 mA versus 6 mA). These differences do not preclude substitution in applications designed for the 3502-12-511 but require verification that drive circuitry can supply the higher coil current.

Frequently Asked Questions (FAQ)

Q: Can the 2332-12-000 directly replace the 3502-12-511 in existing designs?

A: Yes. Both parts share identical electrical specifications for coil voltage, contact configuration, current rating, and switching voltage. Mechanical mounting and termination are identical. The primary consideration is coil current: the 2332-12-000 requires 12 mA versus 6 mA for the 3502-12-511. Existing drive circuitry must supply this higher current.

Q: What are the differences in operating characteristics?

A: The 2332-12-000 operates faster (0.5 ms versus 0.75 ms) and has lower coil resistance (1 kOhm versus 2 kOhm). Release time is marginally longer (0.15 ms versus 0.1 ms). These timing differences are within typical application tolerances for reed relay switching.

Q: Are there packaging differences between these parts?

A: The 3502-12-511 is supplied in standard packaging, while the 2332-12-000 is supplied in trays. Both use identical through-hole PC pin termination suitable for printed circuit board assembly.

Q: Why is the 3502-12-511 obsolete?

A: The 3502-12-511 is classified as obsolete by Coto Technology. The 2332-12-000 represents the current active equivalent from the same manufacturer, offering identical functionality with improved availability.

Q: Are both parts RoHS compliant?

A: Yes. The 3502-12-511 is RoHS compliant. The 2332-12-000 is ROHS3 compliant, representing current regulatory standards. Both are REACH unaffected.

Q: What is the impact of higher coil current on circuit design?

A: The 2332-12-000 coil current of 12 mA is double that of the 3502-12-511 (6 mA). Drive circuitry must be capable of supplying this current at 12VDC. This may require driver transistor or relay driver IC selection verification, but does not affect the relay's switching performance or load-side specifications.

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