L777DFDF50PT D-Sub 50 Position Plug Connector Equivalent & Substitute Parts

Part Overview

The L777DFDF50PT is a 50 position D-Sub plug connector manufactured by Amphenol ICC (Commercial Products). This D-shaped connector features male pins, panel mount through-hole termination, and solder attachment. The connector is actively produced and maintains RoHS compliance with UL94 V-0 flammability rating. Equivalent and substitute parts are identified to provide alternative sourcing options when the primary part number is unavailable or when specific application requirements necessitate alternative connector configurations.

Substiute Parts

L777DFDF50PT

Amphenol ICC (Commercial Products)In Stock: 841L777DFDF50PT Datasheet

Current PartRFQ

208010-2

TE Connectivity AMP ConnectorsIn Stock: 1181208010-2 Datasheet

SimilarRFQ

5208010-2

TE Connectivity AMP ConnectorsIn Stock: 13395208010-2 Datasheet

SimilarRFQ

D50P24A4GV00LF

Amphenol ICC (FCI)In Stock: 1276D50P24A4GV00LF Datasheet

SimilarRFQ

DDMS50P300

Amphenol ICC (FCI)In Stock: 1010DDMS50P300 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L777DFDF50PT is determined by the following critical parameters:

Primary Matching Criteria:

• Connector style: D-Sub
• Connector type: Plug with male pins
• Number of positions: 50
• Number of rows: 3
• Shell size: 5 (DD, D)
• Termination method: Solder
• Contact type: Signal

Secondary Compatibility Factors:

• Voltage rating: Substitute must meet or exceed 300V
• Current rating: Substitute must support minimum 7.5A per contact
• Operating temperature range: Substitute must cover -55°C to 155°C minimum
• Contact finish: Gold plating required
• Flammability rating: UL94 V-0 compliance required
• RoHS compliance status for regulatory applications

Mounting Configuration Variance: Substitutes may differ in mounting type (panel mount versus through-hole board mount) provided the connector maintains mechanical and electrical compatibility with the application interface.

Parameter Comparison

Engineering Selection Recommendations

Full Equivalency (Recommended Primary Substitutes):

5208010-2 (TE Connectivity AMP Connectors, AMPLIMITE HD-20 Series) provides the closest functional equivalency to the L777DFDF50PT. This connector maintains RoHS compliance, UL94 V-0 flammability rating, and active product status. The primary limitation is reduced voltage rating (125V versus 300V) and lower operating temperature maximum (105°C versus 155°C). This substitute is suitable for applications operating within 125V and 105°C maximum specifications.

DDMS50P300 (Amphenol ICC FCI, DM HE501 Series) matches the L777DFDF50PT in voltage rating (300V) and current rating (7.5A per contact). This connector maintains active product status and UL94 V-0 compliance. However, RoHS non-compliance status requires evaluation against regulatory requirements. Operating temperature maximum is 125°C, below the primary part specification of 155°C.

Conditional Substitutes (Application-Dependent):

D50P24A4GV00LF (Amphenol ICC FCI, Delta D Series) provides 300V voltage rating and RoHS compliance with active product status. Current rating is reduced to 5A per contact, and operating temperature maximum is 125°C. This connector includes board lock and grounding indent features. Substitution is conditional on application current requirements not exceeding 5A per contact.

208010-2 (TE Connectivity AMP Connectors, AMPLIMITE HD-20 Series) is not recommended as a primary substitute due to RoHS non-compliance status and reduced electrical ratings (125V voltage, 6A current, 105°C maximum temperature).

Mounting Configuration Consideration:

The L777DFDF50PT specifies panel mount configuration. Substitute parts 208010-2, 5208010-2, D50P24A4GV00LF, and DDMS50P300 specify through-hole board mount configuration. Mechanical compatibility with the application interface must be verified before substitution.

Frequently Asked Questions (FAQ)

Q: Can 208010-2 be used as a direct replacement for L777DFDF50PT?

A: No. The 208010-2 has reduced electrical ratings (125V versus 300V, 6A versus 7.5A) and RoHS non-compliance status. Additionally, it does not support the full operating temperature range (-55°C to 105°C versus -55°C to 155°C). Use only in applications with lower voltage and temperature requirements.

Q: What is the primary difference between 5208010-2 and 208010-2?

A: Both connectors are TE Connectivity AMPLIMITE HD-20 series with identical electrical specifications (125V, 6A, -55°C to 105°C). The primary difference is RoHS compliance status: 5208010-2 is RoHS compliant while 208010-2 is RoHS non-compliant. REACH status also differs: 5208010-2 is REACH unaffected while 208010-2 is REACH affected.

Q: Is DDMS50P300 suitable for high-temperature applications?

A: DDMS50P300 supports operating temperatures from -55°C to 125°C, which is below the L777DFDF50PT specification of -55°C to 155°C. For applications requiring operation above 125°C, DDMS50P300 is not suitable.

Q: What are the mounting differences between the main part and substitutes?

A: The L777DFDF50PT is specified as panel mount with through-hole termination. Substitutes 208010-2, 5208010-2, D50P24A4GV00LF, and DDMS50P300 are specified as through-hole board mount. Mechanical interface compatibility with the application must be verified independently.

Q: Which substitute offers the best overall compatibility?

A: 5208010-2 provides the best regulatory compliance (RoHS compliant, REACH unaffected) and active product status. However, it has reduced voltage (125V) and temperature (105°C maximum) ratings. For applications requiring 300V and higher temperature operation, DDMS50P300 matches electrical specifications but lacks RoHS compliance.

Q: Are all substitutes available in the same packaging as L777DFDF50PT?

A: No. The L777DFDF50PT is packaged in trays. Substitutes 208010-2 and 5208010-2 are packaged in tubes. Substitutes D50P24A4GV00LF and DDMS50P300 are packaged in trays. Packaging differences may affect procurement and handling procedures.

Q: Can D50P24A4GV00LF be used in applications requiring 7.5A per contact?

A: No. D50P24A4GV00LF has a current rating of 5A per contact, which is below the L777DFDF50PT specification of 7.5A. Use only in applications with maximum current requirements of 5A per contact.

Q: What is the significance of contact finish thickness differences?

A: The L777DFDF50PT specifies 30.0µin (0.76µm) gold contact finish thickness. Substitutes 208010-2, 5208010-2, and D50P24A4GV00LF specify flash gold finish thickness, which is thinner. DDMS50P300 does not specify contact finish thickness. Contact finish thickness affects wear resistance and long-term reliability in high-cycle mating applications.