BU480Z-178-HT Equivalent & Substitute Parts

Part Overview

The BU480Z-178-HT is a 48-position DIP socket for ICs and transistors manufactured by On Shore Technology Inc. This surface mount connector features gold-plated beryllium copper mating contacts with 0.100" (2.54mm) pitch and 0.6" (15.24mm) row spacing. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	BU480Z-178-HT
Manufacturer	On Shore Technology Inc.
Category	Sockets for ICs, Transistors
Number of Positions	48 (2 x 24)
Type	DIP, 0.6" (15.24mm) Row Spacing
Pitch - Mating	0.100" (2.54mm)
Contact Finish - Mating	Gold
Contact Material - Mating	Beryllium Copper
Mounting Type	Surface Mount
Termination	Solder
Operating Temperature	-55°C ~ 125°C
Current Rating	1 A
Contact Resistance	7 mOhm
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following core parameters:

Number of Positions: 48 (2 x 24)
Type: DIP, 0.6" (15.24mm) Row Spacing
Pitch - Mating: 0.100" (2.54mm)
Contact Finish - Mating: Gold
Contact Material - Mating: Beryllium Copper
Mounting Type: Surface Mount
Termination: Solder
Operating Temperature: -55°C ~ 125°C

All substitute parts listed meet these core electrical and mechanical parameters. Variations in secondary parameters such as contact finish thickness, post material, post finish, housing material, and current rating are documented in the comparison table below. These variations do not affect functional interchangeability for standard DIP socket applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Current Rating (A)	Contact Resistance (mOhm)	Contact Finish - Post	Housing Material	RoHS Status	Inventory (Pcs)
BU480Z-178-HT	On Shore Technology Inc.	Obsolete	1	7	Copper (Flash)	PBT, Glass Filled	ROHS3 Compliant	908
110-43-648-41-105000	Mill-Max Manufacturing Corp.	Active	3	10	Tin	PCT, Polyester	ROHS3 Compliant	974
110-93-648-41-105000	Mill-Max Manufacturing Corp.	Active	3	—	Tin-Lead	PCT, Polyester	RoHS non-compliant	867
114-41-648-41-117000	Mill-Max Manufacturing Corp.	Active	3	10	Tin	PCT, Polyester	ROHS3 Compliant	670
114-43-648-41-117000	Mill-Max Manufacturing Corp.	Active	3	10	Tin	PCT, Polyester	ROHS3 Compliant	1065
114-87-648-41-117101	Preci-Dip	Active	1	10	Tin	PCT, Polyester, Glass Filled	ROHS3 Compliant	899
114-91-648-41-117000	Mill-Max Manufacturing Corp.	Active	3	10	Tin-Lead	PCT, Polyester	RoHS non-compliant	951
114-93-648-41-117000	Mill-Max Manufacturing Corp.	Active	3	—	Tin-Lead	PCT, Polyester	RoHS non-compliant	1085
ICF-648-F-O	Samtec Inc.	Active	—	—	Tin	Liquid Crystal Polymer (LCP)	ROHS3 Compliant	1096
ICF-648-FM-I	Samtec Inc.	Active	—	—	Tin	Liquid Crystal Polymer (LCP)	ROHS3 Compliant	955
ICF-648-FM-O	Samtec Inc.	Active	—	—	Tin	Liquid Crystal Polymer (LCP)	ROHS3 Compliant	689

Engineering Selection Recommendations

All listed substitute parts are active products with current manufacturing support, addressing the obsolescence status of the BU480Z-178-HT. Selection should prioritize the following criteria:

RoHS3 Compliance Priority: Parts 110-43-648-41-105000, 114-41-648-41-117000, 114-43-648-41-117000, 114-87-648-41-117101, ICF-648-F-O, ICF-648-FM-I, and ICF-648-FM-O maintain ROHS3 compliance matching the original part. Parts 110-93-648-41-105000, 114-91-648-41-117000, and 114-93-648-41-117000 are RoHS non-compliant and should be selected only when legacy design requirements mandate Tin-Lead termination.

Current Rating Consideration: The original BU480Z-178-HT is rated for 1 A. Most substitute parts from Mill-Max (110 and 114 series) are rated for 3 A, providing increased current capacity. The Preci-Dip 114-87-648-41-117101 maintains the 1 A rating. Samtec ICF series parts do not specify current rating in available documentation.

Housing Material: The original part uses PBT with glass filler. Substitute parts employ PCT polyester or Liquid Crystal Polymer (LCP) housing materials, all suitable for surface mount DIP socket applications within the specified temperature range.

Contact Resistance: The original part specifies 7 mOhm contact resistance. Most substitute parts specify 10 mOhm, representing a minor increase within acceptable limits for standard IC socket applications. Samtec ICF series parts do not specify contact resistance.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher current rating than the original BU480Z-178-HT?

A: Yes. The original part is rated for 1 A. Substitute parts rated for 3 A (such as Mill-Max 110 and 114 series) are electrically compatible and provide additional current capacity margin. Current rating is not a limiting factor for substitution in this case.

Q: What is the difference between Tin and Tin-Lead post finishes?

A: Tin-Lead post finishes (found in 110-93, 114-91, and 114-93 series) are RoHS non-compliant. Tin post finishes (found in 110-43, 114-41, 114-43, 114-87, and Samtec ICF series) are ROHS3 compliant. Select based on your design's RoHS compliance requirements.

Q: Are Mill-Max and Samtec parts mechanically interchangeable with the original On Shore part?

A: Yes. All substitute parts maintain the same 48-position DIP configuration, 0.100" (2.54mm) mating pitch, 0.6" (15.24mm) row spacing, and surface mount termination. Mechanical footprint compatibility is assured.

Q: Does housing material affect performance in my application?

A: Housing material does not affect electrical performance. The original PBT with glass filler, substitute PCT polyester, and Samtec LCP materials all meet UL94 V-0 flammability requirements and operate across the -55°C to 125°C temperature range. Material selection is driven by manufacturing availability and cost considerations.

Q: Which substitute part is the closest match to the BU480Z-178-HT?

A: The Preci-Dip 114-87-648-41-117101 maintains the 1 A current rating of the original part and is ROHS3 compliant. For applications requiring higher current capacity, Mill-Max 114-43-648-41-117000 offers active product status, ROHS3 compliance, and 3 A rating with established supply availability.

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