Amphenol ICC 51939-005 PwrBlade® Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-005 is a 42-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 on printed circuit boards. The part is currently classified as obsolete, making identification of active equivalent components essential for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Manufacturer	Amphenol ICC (FCI)
Series	PwrBlade®
Connector Type	Header, Male Pins and Blades
Number of Positions	42
Number of Positions Loaded	30
Pitch	0.100" (2.54mm)
Number of Rows	4
Mounting Type	Board Edge, Through Hole, Right Angle
Termination	Solder
Contact Layout	32 Signal, 10 Power
Contact Finish	Gold or Gold, GXT™
Contact Finish Thickness	30.0µin (0.76µm)
Color	Black
Material Flammability Rating	UL94 V-0
Operating Temperature Range	-20°C to 105°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 51939-005 is determined by strict equivalence across the following critical parameters:

Connector Series & Type: PwrBlade® header with male pins and blades configuration
Position Count & Loading: 42 total positions with 30 positions loaded
Pitch & Row Configuration: 0.100" (2.54mm) pitch with 4-row arrangement
Mounting & Termination: Board edge, through-hole, right-angle orientation with solder termination
Contact Layout: 32 signal contacts and 10 power contacts
Contact Finish Specification: Gold or Gold, GXT™ at 30.0µin (0.76µm) thickness
Environmental Ratings: UL94 V-0 flammability, -20°C to 105°C operating range, MSL 1

The substitute part 51939-005LF maintains full electrical and mechanical compatibility with the original specification while offering active product status and improved compliance certifications.

Parameter Comparison

Parameter	51939-005 (Original)	51939-005LF (Substitute)
Manufacturer	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Series	PwrBlade®	PwrBlade®
Connector Type	Header, Male Pins and Blades	Header, Male Pins and Blades
Number of Positions	42	42
Number of Positions Loaded	30	30
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	4	4
Mounting Type	Board Edge, Through Hole, Right Angle	Board Edge, Through Hole, Right Angle
Termination	Solder	Solder
Contact Layout	32 Signal, 10 Power	32 Signal, 10 Power
Contact Finish	Gold or Gold, GXT™	Gold or Gold, GXT™
Contact Finish Thickness	30.0µin (0.76µm)	30.0µin (0.76µm)
Color	Black	Black
Material Flammability Rating	UL94 V-0	UL94 V-0
Operating Temperature Range	-20°C to 105°C	-20°C to 105°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS Compliant
Packaging	Not specified	Tray

Engineering Selection Recommendations

The 51939-005LF is the direct functional equivalent of the 51939-005 and is suitable for all applications requiring the original part specification. Selection of the 51939-005LF is recommended based on the following factors:

Product Status: The 51939-005LF maintains active product status with Amphenol ICC, ensuring continued availability and supply chain reliability. The original 51939-005 is classified as obsolete.

Compliance Certifications: The 51939-005LF is RoHS Compliant and REACH Affected, meeting current environmental and regulatory requirements. The original part is RoHS non-compliant.

Electrical & Mechanical Equivalence: Both parts are identical in connector type, position count, pitch, mounting configuration, contact layout, and environmental ratings. Full pin-for-pin and mechanical compatibility is maintained.

Packaging: The 51939-005LF is supplied in tray packaging, suitable for automated assembly and production environments.

Frequently Asked Questions (FAQ)

Q: Are the 51939-005 and 51939-005LF electrically identical?

A: Yes. Both parts feature identical connector type, 42-position configuration with 30 positions loaded, 0.100" pitch, 4-row arrangement, 32 signal and 10 power contact layout, gold contact finish at 30.0µin thickness, and operating temperature range of -20°C to 105°C.

Q: What is the primary difference between these parts?

A: The 51939-005LF is the active production equivalent. It is RoHS Compliant and REACH Affected, whereas the original 51939-005 is RoHS non-compliant and obsolete. The 51939-005LF is supplied in tray packaging.

Q: Can the 51939-005LF be used as a direct replacement in existing designs?

A: Yes. The 51939-005LF maintains full mechanical and electrical compatibility with the 51939-005. No design modifications are required for substitution.

Q: Are there any packaging considerations when switching to the 51939-005LF?

A: The 51939-005LF is supplied in tray packaging, which is standard for automated assembly processes. Verify that your assembly equipment is compatible with tray-packaged components.

Q: What is the significance of the "LF" suffix in the part number?

A: The "LF" suffix indicates Lead-Free termination, which is consistent with RoHS compliance requirements.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the 51939-005 and 51939-005LF operate across the identical temperature range of -20°C to 105°C.

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