FCB-205-AY4 Equivalent & Substitute Parts

Part Overview

The FCB-205-AY4 is a general purpose relay manufactured by TE Connectivity Aerospace, Defense and Marine. This DPDT (2 Form C) relay operates on a 28VDC coil and is designed for chassis mount applications. The component features hermetically sealed construction with silver cadmium oxide contacts rated for 5 A switching capacity. The FCB-205-AY4 maintains active product status with 1010 units currently in stock. Substitute parts are identified to provide alternative sourcing options when the primary part number becomes unavailable or when inventory requirements necessitate alternative procurement channels.

Key Parameters

Parameter	Value
Coil Voltage	28VDC
Contact Form	DPDT (2 Form C)
Contact Rating (Current)	5 A
Mounting Type	Chassis Mount
Coil Current	56 mA
Coil Type	Non Latching
Seal Rating	Sealed - Hermetically
Must Operate Voltage	18 VDC
Must Release Voltage	1.5 VDC
Operate Time	4 ms
Release Time	4 ms
Operating Temperature Range	-70°C ~ 125°C
Contact Material	Silver Cadmium Oxide (AgCdO)
Coil Resistance	500 Ohms
Termination Style	PC Pin
Features	Diode
Series	FCB-205, CII

Substitute Part Grouping Explanation

Substitution of the FCB-205-AY4 is determined by electrical and mechanical parameter equivalence within the FCB-205 series. The substitute part FCB-205-0224L qualifies as a parametric equivalent based on identical specifications across all critical parameters: 28VDC coil voltage, DPDT contact form, 5 A contact rating, 56 mA coil current, non-latching coil type, hermetically sealed construction, 18 VDC must-operate voltage, 1.5 VDC must-release voltage, 4 ms operate and release times, -70°C to 125°C operating temperature range, silver cadmium oxide contact material, 500 ohms coil resistance, PC pin termination, and integrated diode feature. Both parts belong to the FCB-205 series and share identical base product number 1617758. Substitution is valid when these parameters remain unchanged in the application circuit.

Parameter Comparison

Parameter	FCB-205-AY4	FCB-205-0224L	Match Status
Manufacturer	TE Connectivity Aerospace, Defense and Marine	TE Connectivity Aerospace, Defense and Marine	Identical
Series	FCB-205, CII	FCB-205, CII	Identical
Coil Voltage	28VDC	28VDC	Identical
Contact Form	DPDT (2 Form C)	DPDT (2 Form C)	Identical
Contact Rating (Current)	5 A	5 A	Identical
Mounting Type	Chassis Mount	Chassis Mount	Identical
Coil Current	56 mA	56 mA	Identical
Coil Type	Non Latching	Non Latching	Identical
Seal Rating	Sealed - Hermetically	Sealed - Hermetically	Identical
Must Operate Voltage	18 VDC	18 VDC	Identical
Must Release Voltage	1.5 VDC	1.5 VDC	Identical
Operate Time	4 ms	4 ms	Identical
Release Time	4 ms	4 ms	Identical
Operating Temperature Range	-70°C ~ 125°C	-70°C ~ 125°C	Identical
Contact Material	Silver Cadmium Oxide (AgCdO)	Silver Cadmium Oxide (AgCdO)	Identical
Coil Resistance	500 Ohms	500 Ohms	Identical
Termination Style	PC Pin	PC Pin	Identical
Features	Diode	Diode	Identical
Product Status	Active	Active	Identical
RoHS Status	RoHS non-compliant	RoHS non-compliant	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Identical

Engineering Selection Recommendations

Both the FCB-205-AY4 and FCB-205-0224L are active products manufactured by TE Connectivity Aerospace, Defense and Marine with identical electrical and mechanical specifications. Selection between these parts is based on inventory availability and procurement requirements rather than technical performance differences. The FCB-205-AY4 currently maintains 1010 units in stock, while the FCB-205-0224L maintains 1060 units in stock. Both parts carry identical RoHS non-compliant and REACH unaffected compliance status. The FCB-205-0224L carries an alternative designation M83536/2-024L. Either part is suitable for direct substitution in applications requiring a 28VDC DPDT general purpose relay with hermetically sealed construction and 5 A contact rating.

Frequently Asked Questions (FAQ)

Q: Can FCB-205-0224L be used as a direct replacement for FCB-205-AY4?

A: Yes. The FCB-205-0224L is a parametric equivalent with identical electrical and mechanical specifications. All critical parameters including coil voltage, contact form, current rating, operating temperature range, and termination style match exactly.

Q: Are there any differences in the contact material between these parts?

A: No. Both parts use silver cadmium oxide (AgCdO) contact material with identical 5 A current rating and switching characteristics.

Q: Do both parts have the same operating temperature range?

A: Yes. Both the FCB-205-AY4 and FCB-205-0224L operate across the identical temperature range of -70°C to 125°C.

Q: What is the significance of the M83536/2-024L designation on the FCB-205-0224L?

A: The M83536/2-024L is an alternative designation for the FCB-205-0224L. Both designations refer to the same component with identical specifications.

Q: Are the coil specifications identical between these parts?

A: Yes. Both parts feature 28VDC coil voltage, 56 mA coil current, 500 ohms coil resistance, non-latching coil type, and integrated diode protection.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both parts carry identical RoHS non-compliant and REACH unaffected status. Moisture sensitivity level is 1 (Unlimited) for both parts.

Q: What is the switching speed of these relays?

A: Both parts operate with 4 ms operate time and 4 ms release time, providing identical switching performance.

Q: Are these parts suitable for aerospace and defense applications?

A: Both parts are manufactured by TE Connectivity Aerospace, Defense and Marine and are designed for aerospace, defense, and marine applications with hermetically sealed construction.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message