FCB-205-0227M General Purpose Relay DPDT 28VDC

Part Overview

The FCB-205-0227M is a general purpose relay manufactured by TE Connectivity Aerospace, Defense and Marine. This DPDT (Double Pole Double Throw) relay is designed for 28VDC coil operation with a 5A contact rating and chassis mount configuration. The component is currently active in production with 1156 pieces in stock. Alternative part numbers may be required due to inventory constraints, application-specific requirements, or supply chain considerations.

Substiute Parts

FCB-205-0227M

TE Connectivity Aerospace, Defense and MarineIn Stock: 1223FCB-205-0227M Datasheet

Current PartRFQ

FCB-205-0127M

TE Connectivity Aerospace, Defense and MarineIn Stock: 743FCB-205-0127M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FCB-205-0227M relay is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Coil voltage: 28VDC
• Contact form: DPDT (2 Form C)
• Contact rating: 5 A
• Coil current: 56 mA
• Coil resistance: 500 Ohms
• Must operate voltage: 18 VDC
• Must release voltage: 1.5 VDC
• Operate time: 4 ms
• Release time: 4 ms

Mechanical Equivalence Requirements:

• Mounting type: Chassis Mount
• Termination style: PC Pin
• Seal rating: Sealed - Hermetically

Environmental and Material Equivalence:

• Operating temperature range: -70°C ~ 125°C
• Contact material: Silver Cadmium Oxide (AgCdO)
• Coil type: Non Latching

The FCB-205-0227M belongs to the FCB-205 series manufactured by TE Connectivity Aerospace, Defense and Marine. Substitute parts must maintain identical electrical performance, mechanical interface, and environmental specifications to ensure direct interchangeability without circuit redesign or mechanical modification.

Parameter Comparison

Engineering Selection Recommendations

The FCB-205-0127M is a direct electrical and mechanical equivalent to the FCB-205-0227M. Both components are manufactured by TE Connectivity Aerospace, Defense and Marine within the FCB-205 series and share identical specifications across all critical parameters including coil voltage, contact form, current rating, timing characteristics, and environmental operating range.

Both parts maintain active product status and are manufactured to the same base product number (1617758). The FCB-205-0227M currently has higher inventory availability (1156 pieces) compared to the FCB-205-0127M (729 pieces).

Both relays are RoHS non-compliant and REACH Unaffected, reflecting their military-grade classification and use of Silver Cadmium Oxide contact material. Selection between these two part numbers should be based on inventory availability and supply chain requirements, as they are functionally interchangeable for all circuit and mechanical applications.

Frequently Asked Questions (FAQ)

Q: Can the FCB-205-0127M be used as a direct replacement for the FCB-205-0227M?

A: Yes. The FCB-205-0127M is electrically and mechanically equivalent to the FCB-205-0227M. All critical parameters including coil voltage (28VDC), contact form (DPDT), current rating (5A), coil resistance (500 Ohms), timing characteristics (4 ms operate/release), and environmental specifications (-70°C ~ 125°C) are identical. No circuit redesign or mechanical modification is required.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by equivalence in: coil voltage (28VDC), contact form (DPDT 2 Form C), contact current rating (5A), coil current (56 mA), coil resistance (500 Ohms), must operate voltage (18 VDC), must release voltage (1.5 VDC), operate time (4 ms), release time (4 ms), mounting type (Chassis Mount), termination style (PC Pin), operating temperature range (-70°C ~ 125°C), contact material (Silver Cadmium Oxide), seal rating (Sealed - Hermetically), and coil type (Non Latching).

Q: Are there differences in military qualification between these parts?

A: The FCB-205-0227M carries MIL-R-83536/2 qualification and military grade designation. The FCB-205-0127M does not list specific qualification or grade information in the provided data. Both parts are manufactured to the same base product number and series specifications.

Q: What is the difference between these two part numbers?

A: The FCB-205-0227M and FCB-205-0127M differ only in their part number designation. All electrical, mechanical, and environmental specifications are identical. The difference in part numbering may reflect manufacturing lot, qualification status, or internal TE Connectivity classification, but does not affect functional performance or interchangeability.

Q: Are both parts currently available?

A: Yes. The FCB-205-0227M has 1156 pieces in stock, and the FCB-205-0127M has 729 pieces in stock. Both are listed as active products.

Q: What is the contact material used in these relays?

A: Both relays use Silver Cadmium Oxide (AgCdO) contact material, which provides reliable switching performance across the 5A contact rating and supports the full operating temperature range of -70°C ~ 125°C.

Q: Are these relays RoHS compliant?

A: No. Both the FCB-205-0227M and FCB-205-0127M are RoHS non-compliant. This reflects their military-grade classification and use of Silver Cadmium Oxide contact material. Both are REACH Unaffected.