Phoenix Contact 1937596 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1937596 is a 12-position terminal block header with male pins, shrouded on four sides, featuring a 0.138" (4.60mm) pitch and 90° right-angle 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, and is constructed from glass-filled polyamide housing with tin-plated contacts.

Substiute Parts

1937596

Phoenix ContactIn Stock: 12011937596 Datasheet

Current PartRFQ

1788709

Phoenix ContactIn Stock: 11551788709 Datasheet

SimilarRFQ

0395026512

MolexIn Stock: 7290395026512 Datasheet

SimilarRFQ

1-284540-2

TE Connectivity AMP ConnectorsIn Stock: 9561-284540-2 Datasheet

SimilarRFQ

1841730000

WeidmüllerIn Stock: 12211841730000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1937596 is determined by the following critical parameters:

Primary Matching Criteria:

• 12 positions (exact match required)
• 0.138" (4.60mm) pitch (exact match required)
• 90° right-angle orientation (exact match required)
• Male pins with solder termination (exact match required)
• Through-hole mounting (exact match required)
• UL94 V-0 flammability rating (exact match required)

Secondary Compatibility Parameters:

• Shrouding configuration (4-side preferred, 2-side acceptable with design review)
• Current rating minimum 8A (UL) or 8A (IEC)
• Voltage rating minimum 250V (IEC) or 300V (UL)
• Contact tail length tolerance: ±0.010" acceptable
• Insulation height tolerance: ±0.020" acceptable

All four substitute parts meet the primary matching criteria. Variations in housing material, contact finish, and electrical ratings above minimum thresholds are acceptable for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (12-Position, 4-Side Shrouded):

The Weidmüller 1841730000, Molex 0395026512, and Phoenix Contact 1788709 (11-position variant noted below) are active products with full compliance certifications. The Weidmüller 1841730000 offers the highest current rating (10A UL) and enhanced ingress protection (IP10), making it suitable for applications requiring additional environmental robustness. The Molex 0395026512 provides gold-plated contacts for improved corrosion resistance in demanding environments. Both maintain the 4-side shrouded configuration and UL94 V-0 rating of the original part.

Alternative Substitute (12-Position, 2-Side Shrouded):

The TE Connectivity 1-284540-2 provides a 12-position configuration with the highest current rating (11A UL) but features 2-side shrouding instead of 4-side. This configuration reduces EMI shielding and may require design review for applications sensitive to electromagnetic interference. The part includes interlocking features and phosphor bronze contacts.

Position Mismatch Consideration:

The Phoenix Contact 1788709 is an 11-position variant within the same COMBICON MC series. This part is not a direct substitute due to the position count difference and should only be considered if the application can accommodate reduced terminal positions.

All substitute parts carry active product status and current compliance certifications (RoHS and REACH), ensuring long-term availability and regulatory support.

Frequently Asked Questions (FAQ)

Q: Can the 11-position Phoenix Contact 1788709 replace the 12-position 1937596?

A: No. The 1788709 has 11 positions while the 1937596 requires 12 positions. Position count is a primary matching criterion and cannot be compromised. Use only if your application design can be modified to use 11 positions.

Q: What is the difference between 4-side and 2-side shrouding?

A: 4-side shrouding provides complete enclosure of the pin field on all four sides, offering superior EMI shielding and mechanical protection. 2-side shrouding (as in the TE Connectivity 1-284540-2) provides shrouding on two opposing sides only. For applications requiring full EMI containment, 4-side shrouded parts are preferred.

Q: Are the contact tail length variations significant?

A: Contact tail lengths range from 0.102" (2.60mm) to 0.140" (4.66mm) across the substitute parts. The original part specifies 0.134" (3.40mm). Variations within ±0.010" are generally acceptable for PCB through-hole mounting, but verify solder joint depth and pad design for parts outside this tolerance band.

Q: Which substitute offers the best environmental performance?

A: The Weidmüller 1841730000 includes IP10 ingress protection rating and operates across -50°C to 100°C, providing enhanced environmental robustness. The Molex 0395026512 operates -40°C to 105°C with gold-plated contacts for corrosion resistance. Select based on specific environmental requirements.

Q: Are all substitutes RoHS compliant?

A: Yes. All substitute parts carry either RoHS or ROHS3 compliance certification. The original 1937596 is RoHS Compliant. All parts are suitable for RoHS-regulated applications.

Q: What is the impact of different housing materials?

A: The original uses glass-filled polyamide. Substitutes employ either glass-filled liquid crystal polymer (LCP) or polyamide 6/6. LCP offers superior dimensional stability and lower moisture absorption (MSL 1 vs. MSL 3), beneficial for high-reliability applications. Polyamide 6/6 provides cost efficiency while maintaining mechanical performance. Material selection does not affect electrical compatibility.

Q: Can I use the Molex part with gold-plated contacts instead of tin-plated?

A: Yes. Gold plating provides superior corrosion resistance and is compatible with tin-plated mating connectors. Gold-plated contacts are preferred for applications with extended shelf life, high humidity exposure, or corrosive environments. No design changes are required.