FCB-405-CX4 Equivalent & Substitute Parts

Part Overview

The FCB-405-CX4 is a general purpose relay manufactured by TE Connectivity Aerospace, Defense and Marine. This 4PDT (4 Form C) relay operates on a 28VDC coil and is designed for chassis mount applications. The part is currently active in production with 788 pieces available in new original stock condition. Substitute parts are identified to provide alternative sourcing options when the primary part number is unavailable or when inventory requirements necessitate additional suppliers.

Substiute Parts

FCB-405-CX4

TE Connectivity Aerospace, Defense and MarineIn Stock: 860FCB-405-CX4 Datasheet

Current PartRFQ

FCB-405-0524L

TE Connectivity Aerospace, Defense and MarineIn Stock: 961FCB-405-0524L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The FCB-405-CX4 relay is substitutable with the FCB-405-0524L based on identical electrical and mechanical parameters. Both parts belong to the FCB-405 series manufactured by TE Connectivity Aerospace, Defense and Marine and share the following critical substitution criteria:

Electrical Parameters (Identical):

• Coil voltage: 28VDC
• Contact form: 4PDT (4 Form C)
• Contact rating: 5 A
• Switching voltage: 115VAC, 28VDC - Max
• Maximum switching load: 575VA, 140W
• Coil current: 70 mA
• Coil type: Non Latching
• Coil resistance: 400 Ohms
• Must operate voltage: 18 VDC
• Must release voltage: 1.5 VDC
• Operate time: 6 ms
• Release time: 6 ms

Mechanical Parameters (Identical):

• Mounting type: Chassis Mount
• Termination style: Solder Hook
• Seal rating: Sealed - Hermetically
• Contact material: Silver Cadmium Oxide (AgCdO)
• Operating temperature range: -70°C ~ 125°C

Both parts are active products with hermetically sealed construction and identical performance characteristics, making them direct functional equivalents.

Parameter Comparison

Engineering Selection Recommendations

Both the FCB-405-CX4 and FCB-405-0524L are active products from TE Connectivity Aerospace, Defense and Marine with identical electrical and mechanical specifications. Selection between these parts is based on availability and inventory requirements rather than functional differences.

The FCB-405-CX4 is available with 788 pieces in new original stock. The FCB-405-0524L provides an alternative source with 910 pieces in new original stock, offering increased inventory availability.

Both parts carry identical compliance designations: RoHS non-compliant, REACH Unaffected, and ECCN EAR99 classification. Moisture sensitivity level is 1 (Unlimited) for both parts, indicating no special handling requirements during storage or assembly.

The substitution is direct and unconditional based on the provided parameters. No additional testing or qualification is required when transitioning between these part numbers within the same application.

Frequently Asked Questions (FAQ)

Q: Can FCB-405-0524L be used as a direct replacement for FCB-405-CX4?

A: Yes. Both parts are identical in all electrical and mechanical parameters, including coil voltage (28VDC), contact form (4PDT), current rating (5 A), switching voltage (115VAC, 28VDC - Max), operating temperature range (-70°C ~ 125°C), and termination style (Solder Hook). They are direct functional equivalents.

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

A: No. Both the FCB-405-CX4 and FCB-405-0524L use Silver Cadmium Oxide (AgCdO) contact material with identical switching load capacity of 575VA at 140W maximum.

Q: What is the difference between FCB-405-CX4 and FCB-405-0524L?

A: The parts are functionally identical. The difference is in the part number designation and base product number (FCB-405-CX4 uses base product 1617761; FCB-405-0524L uses base product 1617787). The FCB-405-0524L carries an alternate designation M83536/5-024L.

Q: Do both parts have the same operating and release times?

A: Yes. Both relays operate in 6 ms and release in 6 ms, with identical must-operate voltage (18 VDC) and must-release voltage (1.5 VDC) specifications.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts share identical compliance status: RoHS non-compliant, REACH Unaffected, and ECCN EAR99. Moisture sensitivity level is 1 (Unlimited) for both.

Q: What is the coil resistance and current draw for these relays?

A: Both relays have a coil resistance of 400 Ohms and draw 70 mA coil current at 28VDC. The non-latching coil type is identical for both parts.

Q: Can these relays be used in sealed or hermetically sealed applications?

A: Yes. Both the FCB-405-CX4 and FCB-405-0524L are hermetically sealed, making them suitable for applications requiring sealed relay construction.