Molex 0874271843 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The Molex 0874271843 is a shrouded vertical rectangular connector header designed for through-hole mounting in board-to-cable/wire applications. This 18-position Mini-Fit Jr connector features a 0.165" (4.20mm) pitch configuration with 2 rows and solder termination. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement planning.

Substiute Parts

0874271843

MolexIn Stock: 10840874271843 Datasheet

Current PartRFQ

0874271842

MolexIn Stock: 41240874271842 Datasheet

DirectRFQ

1-1586037-8

TE Connectivity AMP ConnectorsIn Stock: 14631-1586037-8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0874271843 is determined by strict alignment of the following critical parameters:

• Connector configuration: 18 positions, 2 rows, 0.165" (4.20mm) pitch and row spacing
• Mounting and termination: Through-hole solder termination with locking ramp fastening
• Physical form factor: Shrouded 4-wall design with 0.504" (12.80mm) insulation height
• Contact system: Male pin contacts with tin finish on both mating and post surfaces
• Insulation material: Polyamide or nylon-based materials
• Compliance: ROHS3 compliance and MSL 1 rating

The identified substitute parts maintain these core parameters, ensuring mechanical and electrical compatibility in applications originally designed for the 0874271843.

Parameter Comparison

Engineering Selection Recommendations

Molex 0874271842 is the primary substitute for the obsolete Molex 0874271843. Both parts are from the same Mini-Fit Jr 87427 series and share identical electrical and mechanical specifications. The 0874271842 is currently in active production status with significantly higher inventory availability (4079 units versus 978 units for the original part). This part maintains the UL94 V-0 flammability rating and all other compliance certifications of the original design.

TE Connectivity 1-1586037-8 serves as a cross-manufacturer alternative from the VAL-U-LOK series. This part maintains compatibility across all critical mating parameters including pitch, row spacing, position count, and mounting configuration. The contact post length differs by 0.008" (0.20mm), which may require evaluation in applications with tight clearance constraints. The material flammability rating is UL94 V-2 rather than V-0, and operating temperature range is specified as -40°C to 105°C. This part is suitable for general purpose, industrial, and lighting applications and carries active product status with 1362 units in inventory.

Selection between the Molex 0874271842 and TE Connectivity 1-1586037-8 should be based on application-specific requirements regarding flammability rating, operating temperature range, and contact post length specifications.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0874271842 be used as a direct replacement for the Molex 0874271843?

A: Yes. Both parts are from the same Mini-Fit Jr 87427 series and share identical specifications for pitch, row spacing, position count, mounting type, termination method, shrouding, fastening type, insulation height, contact materials, and finish specifications. The primary difference is product status: the 0874271843 is obsolete while the 0874271842 is active production.

Q: What is the key difference between the Molex 0874271842 and the TE Connectivity 1-1586037-8?

A: The parts are mechanically and electrically compatible for mating purposes. The TE Connectivity part has a contact post length of 0.138" (4.60mm) compared to 0.130" (3.30mm) for the Molex part, a difference of 0.008" (0.20mm). The TE part also has a UL94 V-2 flammability rating versus UL94 V-0 for the Molex part, and specifies an operating temperature range of -40°C to 105°C. These differences should be evaluated against application requirements.

Q: Are there packaging differences between the substitute parts?

A: Yes. The Molex 0874271842 is supplied in tray packaging, while the TE Connectivity 1-1586037-8 is supplied in bulk packaging. The original Molex 0874271843 packaging specification is not provided. Packaging selection should align with procurement and assembly process requirements.

Q: Do all three parts meet RoHS3 compliance?

A: Yes. The Molex 0874271843, Molex 0874271842, and TE Connectivity 1-1586037-8 are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level ratings.

Q: Which substitute part should be selected for new designs?

A: The Molex 0874271842 is recommended for new designs requiring the same specifications as the original 0874271843, as it maintains identical electrical and mechanical parameters and active production status. The TE Connectivity 1-1586037-8 is suitable when cross-manufacturer sourcing is required or when the specified operating temperature range and flammability rating are acceptable for the application.