Phoenix Contact 1757446 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1757446 is a 22-position terminal block header with male pins, shrouded on four sides, featuring 0.200" (5.08mm) pitch and right-angle through-hole mounting. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and procurement continuity. The part operates at IEC ratings of 12A current and 400V voltage, with UL ratings of 15A at 300V. Substitutes must maintain electrical performance and mechanical compatibility while accommodating the transition from obsolete to active product status.

Substiute Parts

1757446

Phoenix ContactIn Stock: 7271757446 Datasheet

Current PartRFQ

1827731

Phoenix ContactIn Stock: 6711827731 Datasheet

SimilarRFQ

OSTOQ225351

On Shore Technology Inc.In Stock: 829OSTOQ225351 Datasheet

SimilarRFQ

OSTOQ225451

On Shore Technology Inc.In Stock: 791OSTOQ225451 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1757446 is determined by the following critical parameters:

Primary Compatibility Criteria:

• 22 positions with 0.200" (5.08mm) pitch
• Right-angle (90°) header orientation
• Male pins with four-side shrouding
• Solder termination capability
• Through-hole or solder mounting compatibility
• Tin contact mating finish
• RoHS compliance

Electrical Performance Criteria:

• IEC current rating of 12A minimum
• Voltage rating of 250V IEC minimum (substitute 1827731) or 300V UL minimum (substitutes OSTOQ225351 and OSTOQ225451)
• UL94 V-0 flammability rating or equivalent thermoplastic housing material

Mechanical Compatibility Criteria:

• Contact tail length and insulation height must accommodate PCB footprint requirements
• Housing material must support equivalent mechanical durability

The three identified substitutes meet these criteria with variations in housing material, voltage ratings, and contact tail geometry that do not compromise functional equivalence within their specified electrical and mechanical operating ranges.

Parameter Comparison

Engineering Selection Recommendations

Phoenix Contact 1827731 (COMBICON CCA Series)

Part 1827731 is an active Phoenix Contact product offering direct manufacturer continuity from the obsolete 1757446. Both components share identical 22-position, 5.08mm pitch, right-angle, four-side shrouded header architecture. The primary electrical difference is the reduced IEC voltage rating of 250V versus the original 400V. The housing material transition from polyamide to liquid crystal polymer (LCP) provides enhanced thermal and mechanical stability. Contact tail length reduction from 4.60mm to 2.60mm requires PCB footprint verification. This substitute is optimal for applications where Phoenix Contact product line continuity and active product status are prioritized.

On Shore Technology OSTOQ225451 (OSTOQ Series)

Part OSTOQ225451 provides an alternative from a different manufacturer while maintaining four-side shrouding and identical 22-position, 5.08mm pitch configuration. This part is rated for 300V UL and operates across -40°C to 115°C, exceeding the temperature range of the original part. The contact tail length of 4.00mm is longer than the original 4.60mm, requiring PCB footprint validation. ROHS3 compliance and active product status support long-term availability. This substitute is suitable for applications requiring extended temperature performance and multi-source procurement strategy.

On Shore Technology OSTOQ225351 (OSTOQ Series)

Part OSTOQ225351 differs from the main part by featuring two-side shrouding instead of four-side shrouding. While maintaining 22 positions, 5.08mm pitch, and right-angle orientation, the reduced shrouding may impact EMI shielding characteristics. The 300V UL rating and -30°C to 105°C operating range are comparable to other substitutes. The 4.00mm contact tail length requires PCB footprint assessment. This substitute is applicable only when two-side shrouding meets design requirements and cost optimization is a secondary consideration.

Frequently Asked Questions (FAQ)

Q: Can Phoenix Contact 1827731 directly replace the obsolete 1757446 without PCB modification?

A: Direct replacement depends on PCB footprint tolerance. The contact tail length differs by 0.90mm (4.60mm versus 2.60mm), and insulation height differs by 0.02mm. Verify that the PCB pad pattern and component clearances accommodate these dimensional variations before substitution.

Q: What is the significance of the shrouding difference between OSTOQ225451 (4-side) and OSTOQ225351 (2-side)?

A: Four-side shrouding provides enhanced mechanical protection and EMI shielding compared to two-side shrouding. If the original design relied on four-side shrouding for EMI performance or mechanical robustness, OSTOQ225351 with two-side shrouding may not be functionally equivalent. OSTOQ225451 maintains four-side shrouding and is the preferred On Shore Technology substitute.

Q: Are the voltage ratings of the substitutes sufficient for the original application?

A: The original 1757446 operates at 400V IEC. Substitute 1827731 is rated for 250V IEC, which is lower. Substitutes OSTOQ225351 and OSTOQ225451 are rated for 300V UL. Application voltage requirements must not exceed the substitute part rating. If the application requires 400V IEC operation, only Phoenix Contact 1827731 within the same manufacturer line should be evaluated for voltage derating or alternative solutions.

Q: What are the RoHS compliance differences between the main part and substitutes?

A: The main part 1757446 is RoHS Compliant. Substitutes 1827731, OSTOQ225351, and OSTOQ225451 are all RoHS or ROHS3 compliant, meeting current environmental regulations. All substitutes are suitable for applications requiring RoHS compliance.

Q: How do contact tail length variations affect PCB design?

A: Contact tail length determines the depth of solder joint penetration and mechanical engagement with PCB pads. The original 1757446 has a 4.60mm tail; substitutes vary from 2.60mm (1827731) to 4.00mm (OSTOQ series). Shorter tails may reduce solder joint strength; longer tails may interfere with component placement or internal PCB routing. PCB pad design and assembly process parameters must be validated for each substitute.

Q: Can multiple substitutes be used interchangeably in the same design?

A: No. Each substitute has distinct dimensional, electrical, and material characteristics. Once a substitute is selected and validated for a specific PCB design, that substitute should be maintained for production consistency. Switching between substitutes requires re-validation of PCB footprint compatibility, electrical performance, and assembly process parameters.