TE Connectivity 747839-4 D-Sub Receptacle 37-Position Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 747839-4 is a 37-position D-Sub receptacle connector with female sockets, right-angle solder termination, and through-hole mounting. This connector is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing system support and new designs. The AMPLIMITE HD-20 series connector features a 4-position shell size (DC, C) with board lock and ground strap functionality, rated for 6A current and 125V operation across an extended temperature range of -55°C to 105°C.

Substiute Parts

747839-4

TE Connectivity AMP ConnectorsIn Stock: 761747839-4 Datasheet

Current PartRFQ

626-037-662-042

Mercury United Electronics, Inc.In Stock: 817626-037-662-042 Datasheet

DirectRFQ

5747839-4

TE Connectivity AMP ConnectorsIn Stock: 10235747839-4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of D-Sub receptacle connectors is determined by strict alignment of electrical and mechanical parameters. The following criteria establish substitutability for the 747839-4:

Critical Parameters for Substitution:

• Connector style (D-Sub) and type (Receptacle, Female Sockets)
• Position count (37) and row configuration (2 rows)
• Shell size and layout (4, DC, C)
• Mounting type (Through Hole, Right Angle)
• Termination method (Solder)
• Flange feature (Housing/Shell with 4-40 specification)
• Contact finish type (Gold) and thickness (30.0µin)
• Material flammability rating (UL94 V-0)
• Backset spacing tolerance (0.590" ±0.006")

Allowable Variations:

• Current rating may be lower than the main part specification
• Voltage rating may be lower than the main part specification
• Operating temperature range may be narrower than the main part specification
• Shell material finish may differ (tin plated vs. nickel plated)
• Contact material composition may differ (phosphor bronze vs. copper alloy)
• Dielectric material composition may differ
• Packaging format may differ (bulk, tube)
• Product status may differ (active vs. obsolete)
• RoHS compliance status may differ

Substitutes must maintain identical connector geometry, position count, shell size, mounting configuration, and contact finish specifications to ensure mechanical and electrical compatibility with mating connectors and PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

5747839-4 (Parametric Equivalent - Recommended Primary Substitute)

The 5747839-4 is the optimal substitute for the obsolete 747839-4. This part maintains identical electrical and mechanical specifications, including 6A current rating, 125V voltage rating, -55°C to 105°C operating temperature range, phosphor bronze contacts, and 0.590" backset spacing. Both parts are from the same manufacturer (TE Connectivity AMP Connectors) and share the AMPLIMITE HD-20 series designation. The 5747839-4 is active in product status and RoHS compliant, providing long-term availability and regulatory compliance. Packaging differs only in format (tube vs. unspecified), which does not affect functional compatibility. This part provides direct substitution without electrical or mechanical compromise.

626-037-662-042 (Direct Substitute - Secondary Option)

The 626-037-662-042 from Mercury United Electronics, Inc. is a functional substitute with the same 37-position D-Sub receptacle configuration, shell size, mounting type, and solder termination. This part is active in product status and ROHS3 compliant. However, the following parameter differences require evaluation:

• Current rating is 3A per contact versus 6A for the main part
• Voltage rating is not specified versus 125V for the main part
• Operating temperature range is -55°C to 85°C versus -55°C to 105°C for the main part
• Backset spacing is 0.584" (14.84mm) versus 0.590" (14.99mm) for the main part
• Shell material finish is nickel plated versus tin plated for the main part
• Contact material is copper alloy versus phosphor bronze for the main part
• Dielectric material is polyester thermoplastic versus unspecified for the main part
• Mounting type includes board edge option in addition to through hole and right angle

The 626-037-662-042 is suitable for applications where current requirements do not exceed 3A per contact and operating temperatures remain within -55°C to 85°C. The backset spacing variation of 0.006" (0.15mm) may require PCB layout verification. This part is appropriate for new designs with lower electrical requirements or as a secondary source when the primary substitute is unavailable.

Frequently Asked Questions (FAQ)

Q: Can the 5747839-4 be used as a direct replacement for the 747839-4 in existing designs?

A: Yes. The 5747839-4 maintains identical specifications for all critical parameters including connector geometry, position count, shell size, mounting configuration, current rating (6A), voltage rating (125V), operating temperature range (-55°C to 105°C), and contact finish. The only difference is packaging format (tube vs. unspecified) and product status (active vs. obsolete). No design modifications are required.

Q: What are the limitations of using the 626-037-662-042 as a substitute?

A: The 626-037-662-042 has three parameter limitations: (1) current rating of 3A per contact versus 6A for the main part, (2) operating temperature range limited to -55°C to 85°C versus -55°C to 105°C for the main part, and (3) backset spacing of 0.584" versus 0.590" for the main part. Applications requiring 6A current capacity or operation above 85°C must use the 5747839-4. The backset spacing variation of 0.006" (0.15mm) requires verification against PCB layout tolerances.

Q: Are there compliance differences between the substitute parts and the main part?

A: Yes. The main part 747839-4 is RoHS non-compliant with vendor-undefined REACH status. The 5747839-4 is RoHS compliant with REACH unaffected status. The 626-037-662-042 is ROHS3 compliant with REACH unaffected status. For applications requiring RoHS or REACH compliance, both substitute parts are acceptable. For legacy systems without compliance requirements, the main part specifications remain valid.

Q: Does the difference in shell material finish (tin plated vs. nickel plated) affect compatibility?

A: The shell material finish difference does not affect electrical or mechanical compatibility with mating connectors. Both tin plating and nickel plating provide corrosion resistance and electrical conductivity. The choice between finishes depends on application environment and cost considerations. Tin plating is standard for the AMPLIMITE HD-20 series (747839-4 and 5747839-4), while nickel plating is used in the Mercury 626 series (626-037-662-042).

Q: Can the 626-037-662-042 be used in high-temperature applications?

A: No. The 626-037-662-042 has a maximum operating temperature of 85°C, while the main part and the 5747839-4 both operate to 105°C. Applications requiring operation above 85°C must use the 5747839-4. For applications with maximum operating temperatures at or below 85°C, the 626-037-662-042 is acceptable.

Q: What is the significance of the backset spacing difference between the main part and the 626-037-662-042?

A: Backset spacing is the distance from the rear of the connector shell to the solder contact plane. The main part specifies 0.590" (14.99mm) while the 626-037-662-042 specifies 0.584" (14.84mm), a difference of 0.006" (0.15mm). This variation may affect PCB layout if the design has tight tolerances for component placement or if the connector is used in conjunction with other components with specific spacing requirements. PCB layout verification is necessary before substitution.

Q: Which substitute part should be selected for new designs?

A: The 5747839-4 is the recommended choice for new designs. It provides identical electrical and mechanical specifications to the obsolete 747839-4, is active in product status with confirmed long-term availability (919 pcs in stock), and is RoHS compliant. The 626-037-662-042 is suitable only for applications with current requirements not exceeding 3A per contact and operating temperatures not exceeding 85°C.

Q: Are there any packaging considerations when substituting these parts?

A: The main part 747839-4 has unspecified packaging, the 5747839-4 is supplied in tube packaging, and the 626-037-662-042 is supplied in bulk packaging. Packaging format does not affect connector functionality but may impact handling, storage, and procurement processes. Tube packaging (5747839-4) provides organized component storage and is standard for active production parts. Bulk packaging (626-037-662-042) is typically used for high-volume applications.