Amphenol ICC 78548-124 Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 78548-124 is a rectangular connector header for through-hole mounting, featuring 24 positions arranged in 2 rows with 0.100" (2.54mm) pitch spacing. This BERGSTIK® II series connector is designed for board-to-board applications and is currently in active production status. Substitute parts are necessary when addressing specific compliance requirements, material specifications, or inventory availability across different manufacturers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	24
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
Insulation Height	0.100" (2.54mm)
Contact Shape	Square
Contact Material	Phosphor Bronze
Material Flammability Rating	UL94 V-0
Insulation Color	Black
Moisture Sensitivity Level (MSL)	1 (Unlimited)
ECCN	EAR99
HTSUS	8536.69.4040

Substitute Part Grouping Explanation

Substitution eligibility for the Amphenol ICC 78548-124 is determined by strict equivalence across the following critical parameters:

Connector Type, Contact Type, and Position Count: All substitute parts must be headers with male pins in 24-position configuration
Pitch and Row Spacing: Mating pitch and row spacing must remain 0.100" (2.54mm) to ensure mechanical compatibility with mating connectors
Mounting and Style: Through-hole mounting and board-to-board style are mandatory for PCB integration compatibility
Shrouding and Fastening: Unshrouded design with push-pull fastening must be maintained
Contact Material and Shape: Phosphor bronze square contacts ensure electrical performance and mechanical fit
Flammability and MSL: UL94 V-0 rating and MSL 1 classification must be preserved for safety and handling requirements

The four Samtec TSW series variants (TSW-112-14-G-D, TSW-112-14-L-D, TSW-112-14-S-D, TSW-112-14-T-D) meet all these core requirements. Variations exist only in contact finish specifications and operating temperature ranges, which do not affect fundamental substitutability.

Parameter Comparison

Parameter	78548-124 (Amphenol ICC)	TSW-112-14-G-D (Samtec)	TSW-112-14-L-D (Samtec)	TSW-112-14-S-D (Samtec)	TSW-112-14-T-D (Samtec)
Manufacturer	Amphenol ICC (FCI)	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Series	BERGSTIK® II	TSW	TSW	TSW	TSW
Connector Type	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	24	24	24	24	24
Number of Rows	2	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	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)	0.100" (2.54mm)
Mounting Type	Through Hole	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	Board to Board or Cable
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.318" (8.08mm)	0.320" (8.13mm)	0.320" (8.13mm)	0.320" (8.13mm)	0.320" (8.13mm)
Contact Length - Post	0.120" (3.05mm)	0.110" (2.79mm)	0.110" (2.79mm)	0.110" (2.79mm)	0.110" (2.79mm)
Overall Contact Length	0.538" (13.67mm)	0.530" (13.46mm)	0.530" (13.46mm)	0.530" (13.46mm)	0.530" (13.46mm)
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Shape	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold or Gold, GXT™	Gold	Gold	Gold	Tin
Contact Finish - Post	Not specified	Gold	Tin	Tin	Tin
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Not specified	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Color	Black	Black	Black	Black	Black
Operating Temperature	Not specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 105°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
ECCN	EAR99	EAR99	EAR99	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040	8536.69.4040	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

Compliance Considerations: The Amphenol ICC 78548-124 is RoHS non-compliant, while all four Samtec TSW variants are ROHS3 compliant. For applications requiring RoHS compliance, any of the four Samtec alternatives are suitable replacements.

Contact Finish Selection:

TSW-112-14-G-D features gold finish on both mating and post contacts, providing maximum corrosion resistance
TSW-112-14-L-D and TSW-112-14-S-D provide gold mating finish with tin post finish, balancing cost and performance
TSW-112-14-T-D uses tin finish on both mating and post contacts, suitable for cost-sensitive applications

Operating Temperature Range: TSW-112-14-G-D, TSW-112-14-L-D, and TSW-112-14-S-D support -55°C to 125°C operation. TSW-112-14-T-D operates within -55°C to 105°C. Select based on application thermal requirements.

Product Status: All parts maintain active production status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Are the Samtec TSW-112 series connectors mechanically compatible with the Amphenol ICC 78548-124?

A: Yes. All substitute parts maintain identical pitch (0.100"), row spacing (0.100"), position count (24), and mounting configuration (through-hole, board-to-board). Minor variations in contact length (0.318" vs. 0.320" mating, 0.120" vs. 0.110" post) fall within standard connector tolerance ranges and do not affect mating compatibility.

Q: What is the difference between the four Samtec TSW variants?

A: The variants differ in contact finish specifications. TSW-112-14-G-D uses gold on both surfaces. TSW-112-14-L-D and TSW-112-14-S-D use gold mating with tin post finish. TSW-112-14-T-D uses tin on both surfaces. Additionally, TSW-112-14-T-D has a reduced operating temperature maximum of 105°C compared to 125°C for the other three variants.

Q: Can I substitute the Amphenol ICC 78548-124 with a Samtec TSW part in an existing design?

A: Direct substitution is mechanically and electrically feasible due to matching pitch, position count, and connector type. However, verify that your PCB layout and mating connector are compatible with the Samtec part's specifications, particularly contact finish and operating temperature range if your application requires specific thermal performance.

Q: Which substitute part should I select for RoHS-compliant applications?

A: All four Samtec TSW variants (TSW-112-14-G-D, TSW-112-14-L-D, TSW-112-14-S-D, TSW-112-14-T-D) are ROHS3 compliant. The original Amphenol ICC 78548-124 is not RoHS compliant. Select the Samtec variant based on your contact finish and operating temperature requirements.

Q: Are there any dimensional differences that could affect PCB layout?

A: Contact length variations are minimal (0.318" to 0.320" mating, 0.120" to 0.110" post). These differences are within standard connector manufacturing tolerances and do not require PCB layout modifications. Insulation height remains constant at 0.100" across all parts.

Q: What is the inventory status of these parts?

A: The Amphenol ICC 78548-124 has 890 pieces in stock. Samtec alternatives have varying availability: TSW-112-14-G-D (2095 pcs), TSW-112-14-L-D (736 pcs), TSW-112-14-S-D (1104 pcs), and TSW-112-14-T-D (895 pcs).

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