Phoenix Contact 1937509 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1937509 is a 3-position terminal block header with male pins, shrouded design, and 90° right-angle orientation. It features 4.6mm pitch spacing, solder termination, and through-hole mounting. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates at 8A per position (IEC) and 250V (IEC), with UL ratings of 8A at 300V.

Substiute Parts

1937509

Phoenix ContactIn Stock: 7611937509 Datasheet

Current PartRFQ

1788521

Phoenix ContactIn Stock: 26631788521 Datasheet

SimilarRFQ

1841640000

WeidmüllerIn Stock: 12211841640000 Datasheet

SimilarRFQ

OQ0312510000G

Amphenol AnytekIn Stock: 2541OQ0312510000G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1937509 is determined by strict adherence to the following core parameters:

• Electrical Compatibility: Current and voltage ratings must meet or exceed IEC 8A/250V and UL 8A/300V specifications
• Mechanical Compatibility: 3-position configuration, 4.6mm pitch spacing, 90° right-angle orientation, male pins with shrouded (4-side) design
• Termination & Mounting: Solder termination and through-hole mounting type
• Regulatory Compliance: UL94 V-0 flammability rating and RoHS compliance status

All three substitute parts meet these core substitution criteria. Variations in housing material, contact tail length, insulation height, and MSL rating do not preclude functional equivalence when the primary electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

Phoenix Contact 1788521 is the primary substitute for the 1937509. Both components share identical manufacturer lineage within the COMBICON MC series, matching electrical specifications (8A IEC, 250V IEC, 8A UL, 300V UL), and maintaining UL94 V-0 flammability compliance. The 1788521 is active in production with higher inventory availability (2560 pcs) and improved MSL rating (1 vs. 3). Housing material differs (LCP vs. PA/Nylon), and contact tail length is shorter (2.60mm vs. 3.40mm), requiring PCB layout verification for through-hole clearance.

Weidmüller 1841640000 provides enhanced electrical performance with 15A IEC current rating and 320V IEC voltage rating, exceeding the original specification. This part is suitable for applications requiring higher current capacity. It features improved MSL rating (1), wider operating temperature range (-50°C to 100°C), and IP10 ingress protection. Contact tail length (3.20mm) is closer to the original specification than the 1788521.

Amphenol Anytek OQ0312510000G meets UL electrical requirements (10A UL, 300V UL) but lacks specified IEC ratings. This part operates across a wider temperature range (-40°C to 115°C) and features the longest contact tail length (4.60mm), matching the original dimension. Housing material is thermoplastic resin, and color is green rather than black. MSL rating is 1 (unlimited).

All three substitutes maintain RoHS compliance and UL94 V-0 flammability rating. Selection should prioritize the 1788521 for direct replacement, with 1841640000 for applications requiring higher current capacity, and OQ0312510000G for extended temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 1788521 directly replace the 1937509 in existing designs?

A: The 1788521 is electrically and mechanically compatible with identical pitch (4.6mm), position count (3), orientation (90°), and electrical ratings (8A IEC/250V IEC, 8A UL/300V UL). However, the contact tail length differs (2.60mm vs. 3.40mm), requiring verification that PCB through-hole depth accommodates the shorter tail. Both parts use solder termination and through-hole mounting.

Q: What are the key differences between the three substitute parts?

A: The 1788521 maintains closest electrical parity with the original part. The 1841640000 offers higher current capacity (15A IEC) and voltage rating (320V IEC), plus extended temperature range and IP10 protection. The OQ0312510000G provides the widest temperature range (-40°C to 115°C) and longest contact tail (4.60mm) but lacks specified IEC ratings. All three meet UL94 V-0 and RoHS requirements.

Q: Does housing material affect substitution compatibility?

A: Housing material differences (PA/Nylon vs. LCP vs. Thermoplastic Resin) do not affect electrical or mechanical substitution compatibility when pitch, position count, orientation, and electrical ratings remain constant. Material selection impacts thermal performance, chemical resistance, and mechanical durability in specific environmental conditions.

Q: Are there packaging or inventory considerations for these substitutes?

A: The 1937509 is obsolete with 732 pcs in stock. The 1788521 (2560 pcs), 1841640000 (1127 pcs), and OQ0312510000G (2458 pcs) are all active production parts with higher availability. Packaging is bulk for all substitute parts.

Q: What is the significance of MSL rating differences?

A: The original 1937509 has MSL 3 (168-hour moisture sensitivity), while all substitutes have MSL 1 (unlimited). Lower MSL ratings indicate reduced moisture absorption and longer shelf life without special storage requirements. This is an improvement over the original specification.

Q: Can the Weidmüller 1841640000 be used in applications designed for 8A operation?

A: Yes. The 1841640000 exceeds the original electrical specification (15A IEC vs. 8A IEC, 320V IEC vs. 250V IEC) and is backward compatible with designs rated for 8A/250V operation. Higher-rated components operate safely at lower current and voltage levels.