TE Connectivity 748481-6 D-Sub High Density 26 Position Receptacle Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 748481-6 is a 26 Position D-Sub High Density Receptacle connector with female sockets, right-angle solder termination, and through-hole mounting. This connector is part of the AMPLIMITE HD-22 series and is classified as obsolete. The part features a nickel-plated steel shell with gold-plated phosphor bronze contacts, rated for 2A at 125V, and operates across the temperature range of -55°C to 105°C.

Due to the obsolete product status of the 748481-6, equivalent and substitute connectors from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Connector Type	D-Sub, High Density Receptacle, Female Sockets
Number of Positions	26
Number of Rows	3
Shell Size, Connector Layout	2 (DA, A) High Density
Mounting Type	Through Hole, Right Angle
Termination	Solder
Shell Material, Finish	Steel, Nickel Plated
Contact Finish	Gold
Current Rating	2A
Voltage Rating	125V
Operating Temperature	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
Dielectric Material	Polybutylene Terephthalate (PBT), Polyester, Glass Filled
Contact Material	Phosphor Bronze
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 748481-6 is determined by strict adherence to the following core parameters:

Critical Matching Parameters:

Connector Type: D-Sub, High Density Receptacle, Female Sockets
Number of Positions: 26
Number of Rows: 3
Shell Size, Connector Layout: 2 (DA, A) High Density
Mounting Type: Through Hole, Right Angle
Termination: Solder
Shell Material, Finish: Steel, Nickel Plated
Contact Finish: Gold
Material Flammability Rating: UL94 V-0

Allowable Variation Parameters:

Current Rating: Substitute parts rated at 3A exceed the 2A requirement and are acceptable for applications within the original 2A specification
Voltage Rating: Substitute parts rated at 250V or 300V exceed the 125V requirement and are acceptable for applications within the original 125V specification
Operating Temperature: Substitute parts with extended upper temperature limits (-55°C ~ 125°C) are acceptable for applications within the original -55°C ~ 105°C range
Contact Finish Thickness: Flash or 30.0µin (0.76µm) are both acceptable gold plating specifications
Dielectric Material: Polyester, Polyamide (PA9T), and Polyester Thermoplastic formulations are acceptable alternatives to PBT
Contact Material: Copper Alloy and Brass are acceptable alternatives to Phosphor Bronze
Flange Feature: Variations in mounting flange configuration (Housing/Shell vs. Mating Side) are acceptable provided through-hole right-angle mounting is maintained
RoHS Status: Substitute parts with RoHS3 compliance are acceptable for new designs

Substitute parts are grouped by manufacturer and series while maintaining all critical matching parameters.

Parameter Comparison

Parameter	748481-6 (TE Connectivity)	634-026-663-043 (Mercury)	181-026-213R561 (NorComp)	634-026-263-042 (Mercury)	ICD26S13E4GX00LF (Amphenol ICC)	ICD26S13E6GL00LF (Amphenol ICC)	ICD26S13E6GV00LF (Amphenol ICC)
Manufacturer	TE Connectivity AMP Connectors	Mercury United Electronics, Inc.	NorComp Inc.	Mercury United Electronics, Inc.	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Connector Type	D-Sub, High Density Receptacle, Female Sockets	D-Sub, High Density Receptacle, Female Sockets	D-Sub, High Density Receptacle, Female Sockets	D-Sub, High Density Receptacle, Female Sockets	D-Sub, High Density Receptacle, Female Sockets	D-Sub, High Density Receptacle, Female Sockets	D-Sub, High Density Receptacle, Female Sockets
Number of Positions	26	26	26	26	26	26	26
Number of Rows	3	3	3	3	3	3	3
Shell Size, Connector Layout	2 (DA, A) High Density	2 (DA, A) High Density	2 (DA, A) High Density	2 (DA, A) High Density	2 (DA, A) High Density	2 (DA, A) High Density	2 (DA, A) High Density
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Panel Mount, Through Hole, Right Angle	Board Edge, Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shell Material, Finish	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Nickel Plated
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Contact Finish Thickness	30.0µin (0.76µm)	Flash	Flash	Flash	Flash	30.0µin (0.76µm)	30.0µin (0.76µm)
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Current Rating (Amps)	2A	3A	3A	3A per Contact	3A	3A	3A
Voltage Rating	125V	Not specified	250V	Not specified	300V	300V	300V
Operating Temperature	-55°C ~ 105°C	Not specified	-55°C ~ 105°C	-55°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Dielectric Material	Polybutylene Terephthalate (PBT), Polyester, Glass Filled	Not specified	Polyamide (PA9T), Nylon 9T	Polyester Thermoplastic	Polyester	Polyester	Polyester
Contact Material	Phosphor Bronze	Not specified	Brass	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy
RoHS Status	RoHS non-compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant
Product Status	Obsolete	Not specified	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For RoHS3 Compliant Applications:

The following substitute parts meet RoHS3 compliance requirements and are recommended for new designs and production environments with regulatory compliance mandates:

181-026-213R561 (NorComp Inc.): Active product status with ROHS3 compliance. Operates at -55°C ~ 105°C, matching the original temperature range. Rated for 3A and 250V, exceeding original specifications. Includes board lock and shielding features.
634-026-263-042 (Mercury United Electronics, Inc.): Active product status with ROHS3 compliance. Rated for 3A per contact. Features board lock and mounting brackets with shielding. Operating temperature range -55°C ~ 85°C is lower than the original specification.
ICD26S13E6GV00LF (Amphenol ICC): Active product status with ROHS3 compliance. Rated for 3A at 300V with extended operating temperature range of -55°C ~ 125°C. Includes board lock and mounting brackets. Contact finish thickness matches original specification at 30.0µin (0.76µm).

For RoHS Compliant Applications (Non-RoHS3):

ICD26S13E4GX00LF (Amphenol ICC): Active product status with RoHS compliance. Rated for 3A at 300V with extended operating temperature range of -55°C ~ 125°C. Highest inventory availability at 11,270 pieces. Includes board lock and mounting brackets.
ICD26S13E6GL00LF (Amphenol ICC): Active product status with RoHS compliance. Rated for 3A at 300V with extended operating temperature range of -55°C ~ 125°C. Contact finish thickness matches original specification at 30.0µin (0.76µm). Includes board lock and mounting brackets.

For Legacy or Non-Compliant Applications:

634-026-663-043 (Mercury United Electronics, Inc.): Direct equivalent with 26-position high-density D-Sub receptacle configuration. Inventory availability of 1,071 pieces. Rated for 3A with gold-plated contacts.
634-026-263-043 (Mercury United Electronics, Inc.): 26-position high-density D-Sub receptacle with 823 pieces in stock. Rated for 3A with gold-plated contacts.
634-026-663-042 (Mercury United Electronics, Inc.): 26-position high-density D-Sub receptacle with 1,036 pieces in stock. Rated for 3A with gold-plated contacts.

Selection Criteria Summary:

All substitute parts maintain the critical parameters of 26-position high-density D-Sub receptacle configuration with female sockets, right-angle through-hole solder termination, nickel-plated steel shell, and gold-plated contacts. Substitute parts provide equal or superior electrical ratings (3A vs. 2A current; 250V–300V vs. 125V voltage) and extended operating temperature ranges. RoHS compliance status and product activity status are primary differentiators for new design selection.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part rated for 3A in an application designed for 2A?

A: Yes. The substitute parts rated for 3A exceed the original 2A specification and are suitable for applications operating at or below 2A. The higher current rating provides additional design margin.

Q: What is the difference between Flash and 30.0µin (0.76µm) gold plating?

A: Both are acceptable gold contact finishes. Flash plating is a thin electroplated layer, while 30.0µin represents a specific thickness specification. The original 748481-6 specifies 30.0µin thickness. Substitute parts with either specification maintain gold contact properties for signal integrity and corrosion resistance.

Q: Are the Amphenol ICC ICD26S13 series parts direct replacements?

A: The Amphenol ICC ICD26S13 series parts are functionally equivalent substitutes. They maintain the 26-position high-density D-Sub receptacle configuration, right-angle solder termination, and through-hole mounting. Variations exist in flange feature configuration (Housing/Shell vs. Mating Side) and dielectric material (Polyester vs. PBT), but these do not affect mechanical or electrical compatibility in standard applications.

Q: Why do some substitute parts have extended operating temperature ranges?

A: Extended operating temperature ranges (-55°C ~ 125°C vs. -55°C ~ 105°C) reflect improved dielectric material formulations and manufacturing processes in active products. These extended ranges are backward-compatible with applications designed for the original -55°C ~ 105°C range.

Q: What is the significance of RoHS3 compliance?

A: RoHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive 2011/65/EU as amended. Parts marked as ROHS3 Compliant meet current European Union environmental and safety standards. The original 748481-6 is RoHS non-compliant. For new designs and applications subject to regulatory requirements, RoHS3 compliant substitutes are necessary.

Q: Can I substitute a part with a different flange feature?

A: Yes, provided the mounting type remains through-hole right-angle. The flange feature variations (Housing/Shell with M3 or 4-40 mounting vs. Mating Side with Female Screwlock 4-40) accommodate different board layout requirements while maintaining the same connector footprint and electrical interface.

Q: What is the difference between Mercury 634-026-263-042 and 634-026-663-042?

A: Both are Mercury 26-position high-density D-Sub receptacles rated for 3A with gold-plated contacts. The 634-026-263-042 specifies Board Edge mounting with mounting brackets and shielding, with an operating temperature range of -55°C ~ 85°C. The 634-026-663-042 does not specify mounting type restrictions and may have different mounting flange configuration. Verify specific board layout requirements before selection.

Q: Is the NorComp 181-026-213R561 suitable for high-temperature applications?

A: The NorComp 181-026-213R561 operates at -55°C ~ 105°C, matching the original 748481-6 specification. For applications requiring operation above 105°C, the Amphenol ICC ICD26S13 series parts with -55°C ~ 125°C operating range are recommended.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in Bulk, Tray, and unspecified packaging configurations. Packaging selection depends on production volume and inventory management requirements. Bulk packaging is typical for high-volume production; Tray packaging is suitable for component handling and storage in automated assembly environments.

Q: Are all substitute parts in active production status?

A: The original 748481-6 is obsolete. All recommended substitute parts are in active production status, ensuring long-term availability and supply chain continuity. Active status is critical for new design qualification and ongoing production support.

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