ICO-320-STT DIP Socket Equivalent & Substitute Parts

Part Overview

The ICO-320-STT is a 20-position DIP socket manufactured by Samtec Inc., designed for through-hole mounting applications requiring low-profile screw machine contact technology. This socket accommodates dual inline package (DIP) integrated circuits with 0.3" (7.62mm) row spacing and 0.100" (2.54mm) pitch contacts. The part is currently in active production status with 715 units available in inventory. Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate specific application requirements such as enhanced current ratings or extended operating temperature ranges.

Substiute Parts

ICO-320-STT

Samtec Inc.In Stock: 813ICO-320-STT Datasheet

Current PartRFQ

110-99-320-41-001000

Mill-Max Manufacturing Corp.In Stock: 1361110-99-320-41-001000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the ICO-320-STT is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Type: DIP with 0.3" (7.62mm) row spacing
• Number of Positions: 20 (2 x 10) configuration
• Pitch - Mating: 0.100" (2.54mm)
• Pitch - Post: 0.100" (2.54mm)
• Mounting Type: Through Hole
• Contact Material - Mating: Beryllium Copper
• Contact Material - Post: Brass or Brass Alloy
• Termination: Solder
• Features: Open Frame

Variable Parameters Permitting Substitution:

• Contact Finish (Tin vs. Tin-Lead)
• Contact Finish Thickness
• Operating Temperature Range (extended range acceptable)
• Current Rating (higher ratings acceptable)
• Contact Resistance (when not specified as critical)
• RoHS Compliance Status
• Housing Material composition (Polyester variants)

The substitute part 110-99-320-41-001000 (Mill-Max Manufacturing Corp.) satisfies all mandatory matching parameters while offering enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - ICO-320-STT (Samtec Inc.): Select this part when RoHS3 compliance is a mandatory design requirement. The ICO-320-STT is actively produced and maintains ROHS3 compliant status. This part is suitable for applications operating within the -55°C to 105°C temperature range with current requirements up to 1 A per contact. The specified contact resistance of 10mOhm provides defined electrical performance for precision applications.

Substitute Selection - 110-99-320-41-001000 (Mill-Max Manufacturing Corp.): Select this part when extended operating temperature range (-55°C to 125°C) or higher current capacity (3 A per contact) is required. This substitute is appropriate for applications where RoHS3 compliance is not mandated. The Tin-Lead contact finish with specified thickness (200.0µin / 5.08µm) provides defined surface characteristics. Both parts share identical mechanical and electrical interface specifications, ensuring direct functional substitution within the stated parameter constraints.

Compliance Consideration: The main part (ICO-320-STT) carries ROHS3 compliance certification, while the substitute (110-99-320-41-001000) is RoHS non-compliant. Design teams must verify regulatory requirements for their specific application before selecting between these options.

Frequently Asked Questions (FAQ)

Q: Can the 110-99-320-41-001000 be used as a direct replacement for the ICO-320-STT on existing PCB designs?

A: Yes, both parts share identical mechanical and electrical interface specifications. The 0.100" (2.54mm) pitch, 20-position DIP configuration, through-hole mounting, and open frame design are identical. PCB footprints designed for the ICO-320-STT will accommodate the 110-99-320-41-001000 without modification.

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

A: The ICO-320-STT uses Tin contact finish, while the 110-99-320-41-001000 uses Tin-Lead finish with specified thickness of 200.0µin (5.08µm). Both finishes are suitable for solder termination. The Tin-Lead finish in the substitute part provides defined thickness specification, whereas the main part does not specify finish thickness.

Q: Why does the substitute part have a higher current rating (3 A vs. 1 A)?

A: The 110-99-320-41-001000 is rated for 3 A per contact, compared to 1 A for the ICO-320-STT. This difference reflects the design and manufacturing specifications of each manufacturer. Applications requiring higher current capacity should select the Mill-Max part.

Q: What is the significance of the extended operating temperature range in the substitute part?

A: The 110-99-320-41-001000 operates from -55°C to 125°C, while the ICO-320-STT operates from -55°C to 105°C. Applications requiring operation above 105°C must use the substitute part. Both parts maintain identical performance within the overlapping temperature range (-55°C to 105°C).

Q: Are there RoHS compliance implications when substituting these parts?

A: Yes. The ICO-320-STT is ROHS3 compliant, while the 110-99-320-41-001000 is RoHS non-compliant. Applications subject to RoHS regulations must use the ICO-320-STT. Applications without RoHS requirements may use either part based on electrical and thermal performance needs.

Q: Do both parts use the same contact materials?

A: Both parts use Beryllium Copper for mating contacts. The post materials are Brass (ICO-320-STT) and Brass Alloy (110-99-320-41-001000), which are compatible materials for this application.

Q: What is the significance of the contact resistance specification in the main part?

A: The ICO-320-STT specifies contact resistance of 10mOhm, providing defined electrical performance for precision applications. The substitute part does not specify contact resistance. Applications requiring defined contact resistance specifications should verify this parameter with the manufacturer before substitution.

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

A: Both parts are suitable for through-hole DIP socket applications. Selection between them depends on specific application requirements: RoHS compliance status, operating temperature range, current capacity, and contact resistance specifications. Verify all requirements against the parameter comparison table before final selection.