Phoenix Contact 1937677 Terminal Block Header – Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1937677 is a 9-position terminal block header with male pins, shrouded on four sides, designed for 0.138" (4.60mm) pitch vertical through-hole mounting. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

The primary reason for identifying substitutes is the obsolete product status, which restricts availability from original manufacturing channels. Equivalent parts must maintain identical electrical performance, mechanical compatibility, and mounting characteristics to ensure seamless integration into existing or new applications.

Substiute Parts

1937677

Phoenix ContactIn Stock: 10741937677 Datasheet

Current PartRFQ

1843677

Phoenix ContactIn Stock: 57371843677 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1937677 is determined by strict equivalence across the following critical parameters:

• Electrical Compatibility: Current and voltage ratings must meet or exceed the original specification (8A IEC, 320V IEC minimum)
• Mechanical Compatibility: Position count (9), pitch (4.60mm), orientation (vertical), and contact tail length (0.134") must be identical
• Mounting Compatibility: Through-hole solder termination with matching insulation height (0.362")
• Regulatory Compliance: UL94 V-0 flammability rating and RoHS compliance required

The Phoenix Contact 1843677 qualifies as a direct substitute based on these parameters. Both components share identical mechanical dimensions, position configuration, and mounting characteristics. Electrical ratings remain compatible within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 1843677 is the qualified substitute for the obsolete 1937677 model. Selection is based on the following engineering criteria:

Product Status: The 1843677 maintains active product status with established supply channels, ensuring long-term availability and support compared to the obsolete 1937677.

Regulatory Compliance: Both components meet UL94 V-0 flammability requirements. The 1843677 carries ROHS3 compliance, representing current regulatory alignment, while the 1937677 holds RoHS Compliant status. Both satisfy moisture sensitivity requirements at MSL 1.

Electrical Performance: The 1843677 maintains full compatibility with UL voltage and current ratings (300V, 8A). The IEC voltage rating of the 1843677 (250V) is lower than the original 1937677 (320V); however, the UL rating of 300V remains equivalent. Applications operating within 250V IEC specifications encounter no functional limitation.

Mechanical Compatibility: Identical pitch (4.60mm), position count (9), contact tail length (0.134"), and insulation height (0.362") ensure direct mechanical interchangeability in through-hole PCB applications.

Material Consideration: The 1843677 uses polybutylene terephthalate (PBT) housing versus the 1937677's polyamide (PA) with glass fill. Both materials maintain UL94 V-0 rating and are suitable for standard industrial terminal block applications.

Frequently Asked Questions (FAQ)

Q: Can the 1843677 directly replace the 1937677 in existing designs?

A: Yes. Both components share identical mechanical dimensions, pitch, position count, and through-hole mounting characteristics. The 1843677 is mechanically and electrically interchangeable for applications operating within its specified ratings.

Q: What is the difference in voltage ratings between these parts?

A: The 1937677 specifies 320V IEC and 300V UL. The 1843677 specifies 250V IEC and 300V UL. For applications requiring 320V IEC operation, the 1937677 specification must be maintained. For applications operating at or below 250V IEC, the 1843677 is fully compatible.

Q: Why does the 1843677 have a different housing material?

A: The 1843677 uses polybutylene terephthalate (PBT) while the 1937677 uses polyamide (PA) with glass fill. Both materials achieve UL94 V-0 flammability rating. Material selection does not affect electrical or mechanical compatibility for standard terminal block applications.

Q: Are there packaging differences between these parts?

A: The 1937677 is listed with unspecified packaging, while the 1843677 is supplied in bulk packaging. Both components are identical in form, fit, and function. Packaging format does not affect component performance or interchangeability.

Q: What is the significance of the product status difference?

A: The 1937677 is classified as obsolete, indicating discontinued manufacturing and restricted availability. The 1843677 maintains active status with established supply channels, making it the recommended choice for new designs and ongoing system support.

Q: Are both components RoHS compliant?

A: Yes. The 1937677 carries RoHS Compliant status, while the 1843677 carries ROHS3 Compliant status. Both satisfy current regulatory requirements for hazardous substance restrictions.