03HR-4K Equivalent & Substitute Parts

Part Overview

The 03HR-4K is a 3-position rectangular receptacle connector manufactured by JST Sales America Inc., designed for IDC (Insulation Displacement Connector) termination with 24 AWG discrete wire. This connector features tin-lead contact finish and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for ongoing system maintenance and new design implementations.

Substiute Parts

03HR-4K

JST Sales America Inc.In Stock: 86903HR-4K Datasheet

Current PartRFQ

03HR-4K-P-N

JST Sales America Inc.In Stock: 105103HR-4K-P-N Datasheet

DirectRFQ

177534-3

TE Connectivity AMP ConnectorsIn Stock: 864177534-3 Datasheet

SimilarRFQ

2-177534-3

TE Connectivity AMP ConnectorsIn Stock: 10432-177534-3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 03HR-4K is determined by the following critical parameters: connector type (receptacle), number of positions (3), pitch (0.098" / 2.50mm), number of rows (1), contact type (female socket), cable termination method (IDC), mounting type (free hanging in-line), and moisture sensitivity level (1). Wire gauge compatibility extends to 24 AWG as the primary specification, with tolerance for 24-28 AWG ranges in similar designs. Contact finish transitions from tin-lead to tin are acceptable within the scope of equivalent substitution. All substitute parts maintain identical mechanical and electrical interface specifications.

Parameter Comparison

Engineering Selection Recommendations

The 03HR-4K-P-N represents the direct equivalent from JST Sales America Inc., maintaining identical mechanical specifications while transitioning to active product status and ROHS3 compliance. This part is the primary recommendation for direct replacement in new designs and legacy system updates.

The TE Connectivity AMP Connectors parts 177534-3 and 2-177534-3 provide cross-manufacturer equivalency with identical pitch, position count, and IDC termination specifications. Both parts are active products with RoHS compliance. The 177534-3 features black color matching the original specification, while 2-177534-3 is available in natural color. Wire gauge specification extends to 24-28 AWG, accommodating the 24 AWG primary requirement. Selection between these TE Connectivity options depends on color requirement and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can 03HR-4K-P-N be used as a direct replacement for 03HR-4K? A: Yes. The 03HR-4K-P-N maintains identical mechanical and electrical interface specifications, including pitch, position count, contact type, and IDC termination. The primary difference is product status (active vs. obsolete) and RoHS compliance improvement.

Q: Are TE Connectivity parts 177534-3 and 2-177534-3 mechanically compatible with 03HR-4K? A: Yes. Both parts share identical pitch (0.098" / 2.50mm), position count (3), row configuration (1), contact type (female socket), and mounting type (free hanging in-line). IDC termination compatibility is maintained.

Q: What is the significance of the wire gauge range 24-28 AWG in substitute parts? A: The 03HR-4K specifies 24 AWG discrete wire. Substitute parts rated for 24-28 AWG accommodate this specification within their broader range. The 24 AWG wire used in 03HR-4K applications falls within the 24-28 AWG capability of equivalent parts.

Q: Does the color difference between 177534-3 (black) and 2-177534-3 (natural) affect compatibility? A: No. Color is a cosmetic parameter and does not affect electrical or mechanical compatibility. Selection should be based on application requirements and visual identification needs.

Q: What is the impact of RoHS compliance differences? A: The 03HR-4K is RoHS non-compliant, while all substitute parts are RoHS compliant. For applications subject to RoHS regulations or environmental compliance requirements, substitute parts are mandatory. For legacy systems without regulatory constraints, either option is functionally equivalent.

Q: Can these parts be used interchangeably in existing assemblies? A: Yes, provided the assembly accommodates the mechanical form factor and color (if applicable). All substitute parts maintain identical pitch, position count, and mounting type, ensuring direct mechanical and electrical interchangeability.