TE Connectivity 1757840-4 D-Sub 37 Position Receptacle Equivalent & Substitute Parts

Part Overview

The TE Connectivity 1757840-4 is a 37 position D-Sub receptacle connector with female sockets, designed for through-hole right-angle solder termination. This connector conforms to military specifications MIL-DTL-24308 and is part of the AMPLIMITE 109 series. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure procurement availability for new production and field service applications.

Substiute Parts

1757840-4

TE Connectivity Aerospace, Defense and MarineIn Stock: 8631757840-4 Datasheet

Current PartRFQ

1757836-4

TE Connectivity Aerospace, Defense and MarineIn Stock: 15151757836-4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete TE Connectivity 1757840-4 is based on electrical and mechanical parameter equivalence. The substitute part must maintain identical specifications across the following critical parameters:

• Connector style and type (D-Sub receptacle with female sockets)
• Position count and row configuration (37 positions, 2 rows)
• Shell size and layout (Size 4, DC/C configuration)
• Mounting orientation and termination method (through-hole right angle solder)
• Shell material and finish (steel with yellow chromate plated zinc)
• Contact material and finish (brass with gold plating at 10.0µin thickness)
• Electrical ratings (5A current, operating temperature -55°C to 125°C)
• Mechanical dimensions (0.318" backset spacing)

The TE Connectivity 1757836-4 satisfies all these parameters and is classified as an active product, making it a direct functional equivalent for the obsolete 1757840-4.

Parameter Comparison

Engineering Selection Recommendations

The TE Connectivity 1757836-4 is the direct equivalent substitute for the obsolete 1757840-4. Both connectors are manufactured by TE Connectivity Aerospace, Defense and Marine and conform to the same military specification MIL-DTL-24308 within the AMPLIMITE 109 series.

The 1757836-4 maintains complete electrical and mechanical compatibility with the 1757840-4 across all specified parameters. The substitute part is currently in active production status, ensuring long-term procurement availability and supply chain continuity.

The 1757836-4 carries ROHS3 compliance and REACH affected status certifications, providing additional regulatory compliance documentation compared to the obsolete part. These certifications support use in applications subject to environmental and hazardous substance restrictions.

Both parts are classified under the same export control number (EAR99) and harmonized tariff code (HTSUS 8536.69.4040), indicating equivalent regulatory treatment for international commerce.

Frequently Asked Questions (FAQ)

Q: Can the 1757836-4 be used as a direct replacement for the 1757840-4 in existing designs?

A: Yes. The 1757836-4 is electrically and mechanically equivalent to the 1757840-4. All connector parameters, including pin count, shell size, mounting configuration, termination method, and electrical ratings, are identical. No design modifications are required.

Q: What is the primary difference between these two part numbers?

A: The 1757840-4 is obsolete, while the 1757836-4 is an active product in current production. The 1757836-4 also includes ROHS3 compliance and REACH affected status certifications. Functionally, both parts are identical.

Q: Are there packaging differences between the 1757840-4 and 1757836-4?

A: The 1757840-4 packaging is not specified in the technical data. The 1757836-4 is supplied in bulk packaging. Confirm specific packaging requirements with the supplier for your application.

Q: Do both connectors meet military specifications?

A: Yes. Both the 1757840-4 and 1757836-4 conform to MIL-DTL-24308 and are part of the AMPLIMITE 109 military series.

Q: What is the operating temperature range for these connectors?

A: Both connectors operate across the temperature range of -55°C to 125°C, suitable for aerospace, defense, and marine applications.

Q: Are the contact materials and finishes identical?

A: Yes. Both connectors use brass contacts with gold plating at a thickness of 10.0µin (0.25µm). The shell material is steel with yellow chromate plated zinc finish on both parts.

Q: What current rating do these connectors support?

A: Both connectors are rated for 5A continuous current.

Q: Is the 1757836-4 suitable for new production designs?

A: Yes. The 1757836-4 is an active product with current production status and is appropriate for new design implementations. It provides the same electrical and mechanical performance as the obsolete 1757840-4 with the added benefit of current regulatory compliance certifications.