SEIFX-8 Equivalent & Substitute Parts

Part Overview

The SEIFX-8 is an 8-circuit barrier block connector manufactured by Curtis Industries, designed for chassis and panel mounting applications. This component features a 0.250" (6.35mm) pitch with dual-wall barrier construction and solder turret termination on the bottom. The product is classified as obsolete, making identification of equivalent substitute parts essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

SEIFX-8

Curtis IndustriesIn Stock: 1181SEIFX-8 Datasheet

Current PartRFQ

SEIFCX-8

Curtis IndustriesIn Stock: 1203SEIFCX-8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SEIFX-8 is determined by strict equivalence across the following critical parameters:

• Terminal block type (Barrier Block)
• Number of circuits (8)
• Pitch specification (0.250" / 6.35mm)
• Current rating (5A)
• Wire gauge compatibility (16-22 AWG)
• Bottom termination type (Solder Turret, Insulated)
• Barrier construction (2 Wall / Dual)
• Operating temperature rating (110°C)
• Insulation material (Polyphenylene Oxide)
• Flammability rating (UL94 V-0)
• Mounting configuration (Chassis, Panel)

The SEIFCX-8 qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. The primary difference lies in the top termination design: the SEIFCX-8 incorporates a captive plate mechanism with the screw termination, whereas the SEIFX-8 uses standard screws without a captive plate. This distinction does not affect electrical performance or physical compatibility in applications where the connector is mounted in a fixed position.

Parameter Comparison

Engineering Selection Recommendations

Both the SEIFX-8 and SEIFCX-8 maintain identical electrical performance specifications and comply with the same regulatory standards (ROHS3, UL94 V-0, REACH Unaffected). The SEIFCX-8 is suitable as a direct replacement for the obsolete SEIFX-8 in applications requiring an 8-circuit, 5A barrier block connector with 0.250" pitch and solder turret termination.

The captive plate feature on the SEIFCX-8 provides mechanical retention of the screw during assembly, which may offer handling advantages in production environments but does not alter electrical or thermal performance. Both components are rated for 110°C operation and accept 16-22 AWG wire.

Material differences in the terminal screw (steel vs. brass with nickel finish on the substitute) do not affect compatibility in standard applications. Both configurations support the same mounting methods (chassis and panel) and maintain equivalent current-carrying capacity at 5A.

Frequently Asked Questions (FAQ)

Q: Can the SEIFCX-8 be used as a direct replacement for the SEIFX-8?

A: Yes. The SEIFCX-8 matches all critical electrical and mechanical parameters of the SEIFX-8, including circuit count, pitch, current rating, wire gauge, operating temperature, and termination type. The captive plate on the SEIFCX-8 is a mechanical enhancement that does not affect electrical compatibility.

Q: What is the difference between the top termination designs?

A: The SEIFX-8 uses standard screws for wire termination. The SEIFCX-8 incorporates a captive plate mechanism that retains the screw during assembly. Both designs provide equivalent electrical connection and accept the same wire gauge range (16-22 AWG).

Q: Are there any compliance or certification differences?

A: No. Both parts carry identical certifications: ROHS3 Compliant, UL94 V-0 flammability rating, and REACH Unaffected status. Both are rated for 110°C continuous operation.

Q: Does the terminal screw material difference affect performance?

A: No. The SEIFX-8 uses steel screws, while the SEIFCX-8 uses brass screws with nickel finish. Both materials provide adequate conductivity and corrosion resistance for the 5A current rating and standard environmental conditions.

Q: What wire gauges are compatible with both connectors?

A: Both the SEIFX-8 and SEIFCX-8 accept wire gauges from 16 to 22 AWG, ensuring compatibility across standard industrial wiring applications.

Q: Are both parts suitable for chassis and panel mounting?

A: Yes. Both connectors support chassis and panel mounting configurations with identical flange design and mechanical interface.