Phoenix Contact 1937334 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1937334 is a 4-position terminal block header with male pins, shrouded design, and 4.6mm pitch in a 90° right-angle through-hole configuration. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing system maintenance and new design implementations. The part operates at 8A per position (IEC) with 320V rating and features UL94 V-0 flammability compliance.

Substiute Parts

1937334

Phoenix ContactIn Stock: 6801937334 Datasheet

Current PartRFQ

1789203

Phoenix ContactIn Stock: 9821789203 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1937334 is determined by the following critical parameters:

• Electrical Compatibility: Current rating (8A per position minimum), voltage rating (320V IEC minimum), and UL/IEC compliance standards
• Physical Compatibility: 4-position configuration, 4.6mm pitch, 90° right-angle orientation, through-hole mounting, and shrouded male pin design
• Termination Compatibility: Solder termination style
• Regulatory Compliance: UL94 V-0 flammability rating and RoHS compliance

The substitute part Phoenix Contact 1789203 meets these core substitution criteria while offering active product status and enhanced compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Phoenix Contact 1789203

The 1789203 is the direct functional equivalent of the obsolete 1937334, sharing identical electrical ratings (8A, 300V UL), physical configuration (4-position, 4.6mm pitch, 90° right-angle), and core compliance certifications (UL94 V-0). The substitute maintains active product status with enhanced RoHS3 compliance and superior moisture resistance (MSL 1 vs. MSL 3).

Compliance Considerations:

• Both parts meet UL94 V-0 flammability requirements
• Substitute offers ROHS3 compliance versus RoHS Compliant on main part
• Substitute includes REACH Unaffected designation

Physical Differences Requiring Verification:

• Contact tail length differs (0.102" vs. 0.134"), necessitating PCB pad layout confirmation
• Insulation height is marginally lower (0.272" vs. 0.285"), requiring clearance validation
• Housing material differs (LCP vs. glass-filled polyamide), though both maintain equivalent electrical and thermal performance

Voltage Rating Consideration: The substitute carries a 250V IEC rating versus 320V on the main part. For applications operating at or above 250V IEC, the 300V UL rating of the substitute remains applicable. Applications requiring the full 320V IEC margin should be evaluated against actual operating voltage requirements.

Frequently Asked Questions (FAQ)

Q: Can Phoenix Contact 1789203 directly replace 1937334 in existing designs?

A: Functional replacement is supported for applications operating within the substitute's electrical ratings (8A, 300V UL, 250V IEC). Physical verification is required for contact tail length (0.102" vs. 0.134") and insulation height (0.272" vs. 0.285") compatibility with existing PCB layouts.

Q: What is the significance of the different housing materials?

A: The main part uses glass-filled polyamide (PA/nylon), while the substitute uses Liquid Crystal Polymer (LCP). Both materials achieve UL94 V-0 flammability compliance. LCP offers superior dimensional stability and moisture resistance, reflected in the substitute's MSL 1 rating versus MSL 3 on the main part.

Q: Does the lower IEC voltage rating (250V vs. 320V) affect substitution eligibility?

A: The substitute's 300V UL rating remains valid for the application. The 250V IEC rating represents a different regulatory standard. Substitution is appropriate for applications operating below 250V IEC or where the 300V UL rating satisfies design requirements.

Q: Are there packaging differences between these parts?

A: The main part is listed with unspecified packaging, while the substitute is supplied in bulk packaging. Verify bulk packaging compatibility with procurement and assembly processes.

Q: What compliance advantage does the substitute offer?

A: The 1789203 carries ROHS3 Compliant and REACH Unaffected designations, providing enhanced regulatory coverage compared to the main part's RoHS Compliant status. Both parts maintain UL94 V-0 flammability compliance.