Equivalent & Substitute Parts for 78548-166HLF

Part Overview

The 78548-166HLF is a rectangular connector header manufactured by Amphenol ICC (FCI) in the BERGSTIK® II series. This through-hole connector features 66 positions arranged in 2 rows with 0.100" (2.54mm) pitch, designed for board-to-board applications. The part is currently active and in stock with 749 units available. Substitute parts are necessary to address supply chain flexibility, alternative sourcing options, or specific application requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

78548-166HLF

Amphenol ICC (FCI)In Stock: 82378548-166HLF Datasheet

Current PartRFQ

TSW-133-14-L-D

Samtec Inc.In Stock: 1181TSW-133-14-L-D Datasheet

MFR RecommendedRFQ

TSW-133-14-T-D

Samtec Inc.In Stock: 950TSW-133-14-T-D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 78548-166HLF are qualified based on the following critical parameters that determine functional and mechanical compatibility:

• Connector Type & Contact Configuration: Header with male pins
• Position Count & Row Configuration: 66 positions in 2 rows
• Pitch Specifications: 0.100" (2.54mm) mating pitch and row spacing
• Mounting & Style: Through-hole mounting for board-to-board applications
• Contact Geometry: Square contact shape with comparable mating and post lengths
• Insulation & Flammability: UL94 V-0 rated insulation material
• Compliance: RoHS compliant with MSL 1 rating

The substitute parts TSW-133-14-L-D and TSW-133-14-T-D from Samtec Inc. meet these core requirements. Variations in contact finish (gold vs. tin), insulation material (PBT vs. PCT), and operating temperature ranges represent acceptable engineering trade-offs within the rectangular connector category.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status and comply with RoHS and REACH requirements. The 78548-166HLF from Amphenol ICC and the TSW-133-14-L-D and TSW-133-14-T-D from Samtec are functionally equivalent for board-to-board through-hole applications requiring 66-position, 2-row headers with 0.100" pitch.

Selection between these parts should be based on:

• Contact Finish Requirements: The 78548-166HLF specifies gold or gold GXT™ mating finish. TSW-133-14-L-D provides gold mating finish, while TSW-133-14-T-D uses tin mating finish. Gold finish is typically preferred for applications requiring superior corrosion resistance and lower contact resistance.

• Insulation Material: The 78548-166HLF uses PCT insulation, while Samtec substitutes use PBT. Both materials are UL94 V-0 rated and suitable for high-reliability applications.

• Operating Temperature Range: TSW-133-14-L-D supports -55°C to 125°C, while TSW-133-14-T-D supports -55°C to 105°C. The 78548-166HLF does not specify an operating temperature range. Applications requiring extended high-temperature operation should prioritize TSW-133-14-L-D.

• Availability & Supply Chain: Current inventory shows 749 units of 78548-166HLF, 1076 units of TSW-133-14-L-D, and 933 units of TSW-133-14-T-D.

Frequently Asked Questions (FAQ)

Q: Are TSW-133-14-L-D and TSW-133-14-T-D interchangeable with 78548-166HLF?

A: Yes, both Samtec parts are functionally equivalent substitutes. They share identical position count (66), row configuration (2 rows), pitch (0.100"), mounting type (through-hole), and contact geometry. Minor variations in contact finish and insulation material do not affect mechanical or electrical compatibility in standard board-to-board applications.

Q: What is the difference between TSW-133-14-L-D and TSW-133-14-T-D?

A: The primary difference is contact finish. TSW-133-14-L-D features gold mating finish, while TSW-133-14-T-D features tin mating finish. Gold finish provides superior corrosion resistance and lower contact resistance, making it suitable for high-reliability and harsh environment applications. Tin finish is cost-effective for standard applications. TSW-133-14-L-D also supports a higher maximum operating temperature (125°C vs. 105°C).

Q: Can I use these connectors for cable-to-board applications?

A: The 78548-166HLF is specified for board-to-board style. The Samtec substitutes (TSW-133-14-L-D and TSW-133-14-T-D) support both board-to-board and cable styles, providing additional application flexibility.

Q: What are the contact length differences?

A: The 78548-166HLF has a mating contact length of 0.318" (8.08mm) and post length of 0.120" (3.05mm). Both Samtec substitutes have mating contact length of 0.320" (8.13mm) and post length of 0.110" (2.79mm). These minor differences (0.002" mating, 0.010" post) are within typical manufacturing tolerances and do not affect compatibility.

Q: Are all three parts RoHS compliant?

A: Yes. The 78548-166HLF is RoHS Compliant, while both Samtec parts are ROHS3 Compliant. All three parts are REACH Unaffected and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: Which part should I select for high-temperature applications?

A: TSW-133-14-L-D supports operating temperatures from -55°C to 125°C, making it the best choice for extended high-temperature operation. TSW-133-14-T-D is rated to 105°C maximum. The 78548-166HLF does not specify an operating temperature range.