BU400Z-178-HT Equivalent & Substitute Parts

Part Overview

The BU400Z-178-HT is a 40-position DIP socket manufactured by On Shore Technology Inc., designed for surface mount applications with 0.6" row spacing and gold-plated mating contacts. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The socket accommodates standard DIP packages with 0.100" pitch and provides reliable electrical connection through beryllium copper contacts with gold surface finish.

Key Parameters

Parameter	Value
Number of Positions	40 (2 x 20)
Row Spacing	0.6" (15.24mm)
Pitch - Mating	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)
Contact Finish - Mating	Gold
Contact Material - Mating	Beryllium Copper
Mounting Type	Surface Mount
Termination	Solder
Operating Temperature Range	-55°C ~ 125°C
Current Rating	1 A
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following core parameters:

Number of positions and row spacing (40 positions, 0.6" spacing)
Mating pitch (0.100")
Post pitch (0.100")
Mounting type (Surface Mount)
Termination method (Solder)
Operating temperature range (-55°C ~ 125°C)

All listed substitute parts maintain these critical parameters. Variations in contact finish (gold vs. tin vs. tin-lead), contact finish thickness, housing material, current rating, and frame type (open vs. closed) are secondary parameters that do not prevent functional substitution but may affect performance characteristics in specific applications.

Parameter Comparison

Parameter	BU400Z-178-HT	110-43-640-41-105000	110-93-640-41-105000	114-41-640-41-117000	114-43-640-41-117000	114-91-640-41-117000	114-93-640-41-117000	214-44-640-01-670800	214-99-640-01-670800	ICF-640-F-I	ICF-640-F-O
Manufacturer	On Shore Technology Inc.	Mill-Max Manufacturing Corp.	Mill-Max Manufacturing Corp.	Mill-Max Manufacturing Corp.	Mill-Max Manufacturing Corp.	Mill-Max Manufacturing Corp.	Mill-Max Manufacturing Corp.	Mill-Max Manufacturing Corp.	Mill-Max Manufacturing Corp.	Samtec Inc.	Samtec Inc.
Number of Positions	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)
Row Spacing	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Tin	Tin-Lead	Gold	Gold
Contact Material - Mating	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Features	Open Frame	Open Frame	Open Frame	Open Frame	Open Frame	Open Frame	Open Frame	Closed Frame	Closed Frame	Open Frame	Open Frame
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating (Amps)	1 A	3 A	3 A	3 A	3 A	3 A	3 A	3 A	3 A	Not specified	Not specified
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed maintain functional compatibility with the BU400Z-178-HT through identical critical parameters: 40-position configuration, 0.6" row spacing, 0.100" pitch, surface mount termination, and -55°C to 125°C operating range.

For applications requiring RoHS3 compliance, select from: 110-43-640-41-105000, 114-41-640-41-117000, 114-43-640-41-117000, 214-44-640-01-670800, ICF-640-F-I, or ICF-640-F-O.

For applications where RoHS compliance is not required, 110-93-640-41-105000, 114-91-640-41-117000, 114-93-640-41-117000, and 214-99-640-01-670800 are available.

All substitute parts are currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete BU400Z-178-HT.

Frequently Asked Questions (FAQ)

Q: Can I directly replace BU400Z-178-HT with any of these substitute parts?

A: Yes. All listed parts share identical critical parameters: 40 positions, 0.6" row spacing, 0.100" mating and post pitch, surface mount configuration, and solder termination. Physical footprint and electrical performance are compatible.

Q: What is the difference between open frame and closed frame designs?

A: Open frame sockets (BU400Z-178-HT, Mill-Max 110 an

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