Amphenol ICC 51939-149 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-149 is a 15-position blade power connector header designed for board edge, through-hole, right-angle mounting applications. This connector features male pins and blades with a 0.100" (2.54mm) pitch, configured with 8 signal and 7 power contacts across 4 rows. The part is classified as obsolete, making identification of active equivalent components essential for ongoing system support and new design implementations.

Substiute Parts

51939-149

Amphenol ICC (FCI)In Stock: 88951939-149 Datasheet

Current PartRFQ

51939-149LF

Amphenol ICC (FCI)In Stock: 103251939-149LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 51939-149 is determined by strict equivalence across the following critical parameters:

• Connector Type & Style: Header with male pins and blades, blade power configuration
• Electrical Configuration: 15 positions with 8 signal and 7 power contact layout
• Mechanical Dimensions: 0.100" (2.54mm) pitch, 4-row arrangement, board edge right-angle mounting
• Termination & Contact Properties: Solder termination, gold contact finish at 30.0µin thickness
• Environmental Ratings: UL94 V-0 flammability, -20°C to 105°C operating range, MSL 1
• Series Compatibility: PwrBlade® series designation

The substitute part 51939-149LF maintains identical electrical and mechanical specifications while differing in product status and RoHS compliance classification.

Parameter Comparison

Engineering Selection Recommendations

The 51939-149LF serves as the direct functional equivalent to the obsolete 51939-149. Both parts share identical electrical and mechanical specifications, including connector type, position count, pitch, mounting configuration, contact layout, and environmental ratings.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The 51939-149 is classified as obsolete and RoHS non-compliant, while the 51939-149LF maintains active production status and RoHS compliance. For applications requiring ongoing component availability and regulatory adherence to RoHS standards, the 51939-149LF is the appropriate selection.

Both parts carry identical certifications including UL94 V-0 flammability rating and MSL 1 moisture sensitivity classification, ensuring equivalent performance in thermal and environmental conditions.

Frequently Asked Questions (FAQ)

Q: Are the 51939-149 and 51939-149LF mechanically interchangeable?

A: Yes. Both parts feature identical mounting type (board edge, through-hole, right-angle), pitch (0.100"), row configuration (4 rows), and position count (15). They are mechanically interchangeable in PCB designs.

Q: What is the functional difference between these two parts?

A: There is no functional difference. Both parts provide identical electrical performance with 8 signal and 7 power contacts, identical contact finish specifications (gold at 30.0µin thickness), and identical operating temperature range (-20°C to 105°C).

Q: Why does the 51939-149LF have RoHS compliance while the 51939-149 does not?

A: The 51939-149 is classified as obsolete, reflecting an earlier manufacturing period. The 51939-149LF represents the current production equivalent with updated RoHS compliance status.

Q: What packaging is available for the 51939-149LF?

A: The 51939-149LF is supplied in Tray packaging. The original 51939-149 packaging specification is not provided in the technical data.

Q: Can I use the 51939-149LF as a replacement in existing designs using the 51939-149?

A: Yes. The 51939-149LF is a direct substitute with identical electrical and mechanical specifications. No design modifications are required.

Q: Are there any differences in contact finish between these parts?

A: No. Both parts feature gold or gold GXT™ contact finish with identical thickness specification of 30.0µin (0.76µm).