EHT-122-01-S-D Equivalent & Substitute Parts

Part Overview

The EHT-122-01-S-D is an active rectangular connector header manufactured by Samtec Inc. This through-hole mounted connector features 44 positions arranged in 2 rows with 0.079" (2.00mm) pitch spacing. The connector is shrouded with 4-wall design and includes latch lock/eject hooks for secure mating. It is designed for board-to-cable/wire applications with solder termination and operates across the temperature range of -55°C to 125°C. Equivalent and substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements necessitate alternative specifications.

Substiute Parts

EHT-122-01-S-D

Samtec Inc.In Stock: 1157EHT-122-01-S-D Datasheet

Current PartRFQ

155244-6302-RB

3MIn Stock: 2369155244-6302-RB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EHT-122-01-S-D is determined by strict alignment of the following critical parameters:

• Connector type (Header)
• Contact type (Male Pin)
• Number of positions (44)
• Number of rows (2)
• Pitch spacing (0.079" / 2.00mm)
• Row spacing (0.079" / 2.00mm)
• Mounting type (Through Hole)
• Shrouding configuration (Shrouded - 4 Wall)
• Termination method (Solder)
• Fastening type (Latch Lock/Eject Hooks)
• Contact shape (Square)
• Insulation material (Liquid Crystal Polymer)
• Product status (Active)
• Regulatory compliance (ROHS3, UL94 V-0)

The substitute part 155244-6302-RB manufactured by 3M meets all critical dimensional and functional requirements for direct substitution in board-to-cable/wire applications.

Parameter Comparison

Engineering Selection Recommendations

Both the EHT-122-01-S-D and 155244-6302-RB are active products with ROHS3 compliance and UL94 V-0 flammability ratings. Selection between these parts must account for the following differences:

The EHT-122-01-S-D supports a maximum operating temperature of 125°C and a current rating of 3A. The 155244-6302-RB operates to a maximum of 105°C with a current rating of 1.25A. Applications requiring sustained operation above 105°C or current levels exceeding 1.25A per contact must use the EHT-122-01-S-D.

The 155244-6302-RB features a glass-filled LCP insulation material and increased insulation height (0.425" versus 0.370"), which may provide enhanced mechanical rigidity in specific mounting configurations. The mating contact length differs by 0.030" (0.76mm), with the 3M part providing extended mating contact length.

Both parts share identical pitch spacing, row configuration, shrouding design, and fastening mechanisms, ensuring mechanical and electrical compatibility at the connector interface level.

Frequently Asked Questions (FAQ)

Q: Can the 155244-6302-RB directly replace the EHT-122-01-S-D in all applications?

A: Direct replacement is possible only when application requirements do not exceed the 155244-6302-RB specifications. The substitute part is limited to 105°C maximum operating temperature and 1.25A per contact current rating. Applications requiring higher temperature operation or current capacity must use the EHT-122-01-S-D.

Q: What are the key dimensional differences between these connectors?

A: The mating contact length differs by 0.030" (0.76mm), with the 155244-6302-RB providing longer mating contacts. Insulation height differs by 0.055" (1.40mm). These differences may affect PCB layout and mating depth considerations in space-constrained designs.

Q: Are the connectors mechanically compatible?

A: Yes. Both connectors share identical pitch spacing (0.079" / 2.00mm), row spacing, shrouding configuration, and fastening mechanisms. Mating interfaces are mechanically compatible.

Q: What is the significance of the glass-filled LCP insulation in the 155244-6302-RB?

A: Glass-filled LCP provides enhanced mechanical rigidity and dimensional stability compared to unfilled LCP. This may improve performance in applications subject to thermal cycling or mechanical stress.

Q: How do the packaging formats differ?

A: The EHT-122-01-S-D is supplied in tube packaging, while the 155244-6302-RB is supplied in tray packaging. Packaging format may affect handling, storage, and automated assembly processes.

Q: Are both parts RoHS compliant?

A: Yes. Both the EHT-122-01-S-D and 155244-6302-RB are ROHS3 compliant and carry UL94 V-0 flammability ratings.