Amphenol ICC 78548-142 Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 78548-142 is a rectangular connector header designed for through-hole mounting applications. This BERGSTIK® II series component features 42 positions arranged in 2 rows with 0.100" (2.54mm) pitch spacing, suitable for board-to-board interconnections. The part is currently active in production with 758 units in stock. Substitute parts are identified to address inventory availability, compliance requirements, or specific application needs while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	42
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Style	Board to Board
Shrouding	Unshrouded
Fastening Type	Push-Pull
Contact Shape	Square
Contact Material	Phosphor Bronze
Insulation Color	Black
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 78548-142 are identified from the Samtec TSW series based on matching critical parameters: 42-position configuration, 2-row layout, 0.100" (2.54mm) pitch spacing, male pin contact type, through-hole mounting, unshrouded design, square contact shape, phosphor bronze material, and UL94 V-0 flammability rating. The three substitute parts (TSW-121-14-L-D, TSW-121-14-S-D, TSW-121-14-T-D) differ in contact finish specifications and operating temperature ranges, which are secondary parameters that do not affect mechanical interchangeability or basic electrical function in standard applications.

Parameter Comparison

Parameter	78548-142 (Amphenol ICC)	TSW-121-14-L-D (Samtec)	TSW-121-14-S-D (Samtec)	TSW-121-14-T-D (Samtec)
Connector Type	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	42	42	42	42
Number of Rows	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Style	Board to Board	Board to Board or Cable	Board to Board or Cable	Board to Board or Cable
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Shape	Square	Square	Square	Square
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Not specified	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)
Insulation Color	Black	Black	Black	Black
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Contact Finish - Mating	Gold or Gold, GXT™	Gold	Gold	Tin
Contact Finish - Post	Not specified	Tin	Tin	Tin
Operating Temperature	Not specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 105°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All three Samtec TSW-121 substitute parts maintain mechanical and electrical compatibility with the 78548-142 based on matching critical parameters. The primary differentiators are compliance status and contact finish specifications:

TSW-121-14-L-D and TSW-121-14-S-D both feature gold mating contact finish with operating temperature ranges of -55°C to 125°C. TSW-121-14-L-D specifies 10.0µin (0.25µm) gold thickness, while TSW-121-14-S-D specifies 30.0µin (0.76µm) gold thickness, matching the original 78548-142 specification. All Samtec variants are ROHS3 compliant, whereas the original 78548-142 is RoHS non-compliant. TSW-121-14-T-D features tin mating contact finish with a reduced operating temperature range of -55°C to 105°C.

Selection should be based on compliance requirements, contact finish durability needs, and operating temperature specifications for the target application.

Frequently Asked Questions (FAQ)

Q: Are the Samtec TSW-121 series parts mechanically interchangeable with the Amphenol ICC 78548-142?

A: Yes. All substitute parts share identical pitch spacing (0.100" / 2.54mm), position count (42), row configuration (2 rows), mounting type (through-hole), contact shape (square), and fastening mechanism (push-pull). Physical footprint and mating interface are compatible.

Q: What is the difference between TSW-121-14-L-D, TSW-121-14-S-D, and TSW-121-14-T-D?

A: The primary differences are contact finish specifications and operating temperature ranges. TSW-121-14-L-D and TSW-121-14-S-D both use gold mating finish with -55°C to 125°C operating range; they differ in gold thickness (10.0µin vs. 30.0µin). TSW-121-14-T-D uses tin mating finish with a -55°C to 105°C operating range.

Q: Does the contact finish difference affect electrical performance?

A: Contact finish affects corrosion resistance and long-term reliability in specific environmental conditions. Gold finishes provide superior corrosion resistance compared to tin. The choice depends on application environment and expected service life.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three Samtec TSW-121 variants are ROHS3 compliant. The original 78548-142 is RoHS non-compliant. If RoHS compliance is required, substitute parts must be selected.

Q: Can these parts be used in high-temperature applications?

A: TSW-121-14-L-D and TSW-121-14-S-D are rated to 125°C. TSW-121-14-T-D is rated to 105°C. Application requirements should determine which variant is appropriate.

Q: What is the inventory status of substitute parts?

A: TSW-121-14-S-D has 1091 units in stock, TSW-121-14-L-D has 936 units, and TSW-121-14-T-D has 697 units available.

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