SI-50139-F Equivalent & Substitute Parts

Part Overview

The SI-50139-F is a 1-port RJ45 through-hole modular connector manufactured by Stewart Connector, designed for 10/100 Base-T Ethernet applications. This connector features a 90° right-angle orientation with integrated LED indicators (green-yellow) and is mounted on printed circuit boards via solder termination. The part is currently in active production status with 1118 units in stock inventory.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the same application category while meeting identical compliance and certification requirements.

Substiute Parts

SI-50139-F

Stewart ConnectorIn Stock: 1149SI-50139-F Datasheet

Current PartRFQ

0480250002

MolexIn Stock: 16260480250002 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 0480250002 (Molex 48025 series) qualifies as an equivalent based on the following critical parameters:

• Identical connector type (RJ45) and port configuration (1 port, single row)
• Matching application specification (10/100 Base-T)
• Identical mounting method (through-hole solder termination)
• Matching mechanical orientation (90° right angle)
• Equivalent LED indicator configuration (green-yellow)
• Identical core count (5 cores per jack)
• Matching shielding design (shielded with EMI finger)
• Identical contact finish specification (gold plating at 50.0µin thickness)
• Equivalent compliance certifications (ROHS3 Compliant, REACH Unaffected, EAR99 ECCN classification)

Physical height variation (0.550" vs 0.524") and contact material differences (copper alloy vs phosphor bronze) remain within acceptable tolerances for PCB layout and electrical performance in this connector category.

Parameter Comparison

Engineering Selection Recommendations

Both SI-50139-F and 0480250002 maintain active production status and carry identical regulatory compliance certifications (ROHS3 Compliant, REACH Unaffected, EAR99 classification). Selection between these parts should be based on:

• PCB layout constraints: The 0480250002 offers a reduced height profile (0.524" vs 0.550"), which may be advantageous in space-constrained designs.
• Supply chain availability: Current inventory shows 1586 units of 0480250002 versus 1118 units of SI-50139-F.
• Housing material specification: The Molex part features glass-filled thermoplastic housing, providing enhanced mechanical rigidity compared to standard thermoplastic.
• Contact material performance: Phosphor bronze (0480250002) offers different wear characteristics compared to copper alloy (SI-50139-F) in high-cycle mating applications.

Both parts satisfy identical electrical and mechanical requirements for 10/100 Base-T Ethernet applications with through-hole PCB mounting.

Frequently Asked Questions (FAQ)

Q: Can 0480250002 be used as a direct replacement for SI-50139-F in existing PCB designs?

A: Yes, provided PCB layout accommodates the 0.026" height difference (0.550" vs 0.524"). The connector footprint, pin configuration, and electrical performance are equivalent. Verify mechanical clearance above the board before implementation.

Q: Are there differences in LED indicator performance between these connectors?

A: Both connectors feature identical green-yellow LED color specifications and 5-core jack configuration. LED performance characteristics are equivalent for 10/100 Base-T signaling applications.

Q: What is the significance of the contact material difference (copper alloy vs phosphor bronze)?

A: Both materials provide gold-plated surfaces at identical thickness (50.0µin). The base material difference affects mechanical durability in high-cycle mating scenarios. Copper alloy offers standard performance; phosphor bronze provides enhanced wear resistance in applications exceeding 500 mating cycles.

Q: Does the glass-filled thermoplastic housing of 0480250002 affect compatibility?

A: No. The glass-filled variant provides improved mechanical rigidity and thermal stability without affecting electrical performance or PCB mounting compatibility. This is a material enhancement that does not impact substitution suitability.

Q: Are packaging differences significant for component selection?

A: SI-50139-F is supplied in unspecified packaging; 0480250002 is supplied in tray packaging. This affects handling and storage procedures but does not impact electrical or mechanical performance. Verify packaging requirements for your assembly process.

Q: Do both connectors meet the same compliance standards?

A: Yes. Both parts are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 under export control regulations. Moisture sensitivity level is identical (MSL 1 - Unlimited) for both connectors.