Amphenol ICC 51939-136 Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-136 is a 20-position backplane connector header featuring male pins and blades in a right-angle, board edge, through-hole configuration. This connector is part of the PwrBlade® series and is designed for applications requiring integrated signal and power distribution with a 4-row blade power layout (16 signal, 4 power contacts).

The 51939-136 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production and field service requirements for systems utilizing this connector family.

Substiute Parts

51939-136

Amphenol ICC (FCI)In Stock: 74551939-136 Datasheet

Current PartRFQ

51720-10201602ABLF

Amphenol ICC (FCI)In Stock: 91251720-10201602ABLF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 51939-136 is determined by strict equivalence across the following critical parameters:

• Connector Type & Style: Header with male pins and blades, blade power configuration
• Position Count & Layout: 20 positions with 16 signal and 4 power contact arrangement
• Pitch & Row Configuration: 0.100" (2.54mm) pitch with 4-row structure
• Mounting & Termination: Board edge, through-hole, right-angle orientation with solder termination
• Contact Specifications: Gold or Gold GXT™ finish with 30.0µin (0.76µm) thickness
• Environmental Ratings: UL94 V-0 flammability, -20°C to 105°C operating range
• Series Compatibility: PwrBlade® series membership

The substitute part 51720-10201602ABLF meets all these criteria while offering active product status and improved compliance posture.

Parameter Comparison

Engineering Selection Recommendations

The 51720-10201602ABLF is the direct functional equivalent to the 51939-136 across all electrical and mechanical parameters. Selection of the substitute part is supported by the following factors:

Product Status: The 51939-136 is obsolete, creating supply and long-term availability constraints. The 51720-10201602ABLF maintains active product status, ensuring continued availability and manufacturer support.

Regulatory Compliance: The 51720-10201602ABLF is RoHS compliant and REACH affected, meeting current environmental and regulatory requirements. The original 51939-136 is RoHS non-compliant, which may present compliance challenges in new designs or regulated applications.

Functional Equivalence: Both parts share identical electrical and mechanical specifications within the PwrBlade® series, including connector type, position count, pitch, mounting configuration, contact layout, and operating temperature range.

Packaging: The substitute part is supplied in tray packaging, which is standard for production environments and supports automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Are the 51939-136 and 51720-10201602ABLF mechanically interchangeable?

A: Yes. Both connectors feature identical mounting configurations (board edge, through-hole, right-angle), pitch (0.100"), position count (20), and row structure (4 rows). They are mechanically interchangeable in applications designed for the PwrBlade® 20-position header format.

Q: What are the key differences between these parts?

A: The primary differences are product status and regulatory compliance. The 51939-136 is obsolete and RoHS non-compliant, while the 51720-10201602ABLF is active and RoHS compliant. All electrical and mechanical specifications are identical.

Q: Can I use the 51720-10201602ABLF as a direct replacement in existing designs?

A: Yes. The substitute part meets all functional and dimensional requirements of the original part. No design modifications are required for mechanical or electrical compatibility.

Q: Does the contact finish differ between these parts?

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

Q: What is the significance of RoHS compliance for this substitution?

A: RoHS compliance is required for many regulated markets and applications. The 51720-10201602ABLF's RoHS compliance status makes it suitable for new designs and applications subject to environmental regulations, whereas the non-compliant 51939-136 may face restrictions in such applications.

Q: Are there any temperature or environmental rating differences?

A: No. Both parts operate across the identical temperature range of -20°C to 105°C and share the same UL94 V-0 flammability rating.

Q: What packaging format is used for the substitute part?

A: The 51720-10201602ABLF is supplied in tray packaging, which is standard for production environments and compatible with automated assembly equipment.