SS-120-TT-2 Equivalent & Substitute Parts

Part Overview

The SS-120-TT-2 is a 20-position receptacle connector manufactured by Samtec Inc., designed for board-to-board applications with 0.100" (2.54mm) pitch through-hole mounting. This connector features tin contact finish, solder termination, and push-pull fastening. The part is currently active in production with 1122 units in stock and maintains ROHS3 compliance with unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across core functional specifications, enabling component interchangeability in applications where the primary part becomes unavailable or when alternative packaging or compliance requirements necessitate alternative sourcing.

Substiute Parts

SS-120-TT-2

Samtec Inc.In Stock: 1230SS-120-TT-2 Datasheet

Current PartRFQ

310-99-120-41-001000

Mill-Max Manufacturing Corp.In Stock: 1015310-99-120-41-001000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SS-120-TT-2 is determined by strict equivalence across the following core parameters:

• Connector Type & Contact Configuration: Both main and substitute parts must be receptacle connectors with female socket contacts
• Position Count & Pitch: Exact match required at 20 positions with 0.100" (2.54mm) mating pitch
• Mounting & Termination: Through-hole solder termination with board-to-board style
• Contact Material & Geometry: Beryllium copper contacts with circular shape
• Operating Temperature: Minimum -55°C to 125°C range
• Mechanical Compatibility: Contact length and insulation height must support equivalent mating with standard 0.100" pitch headers

The identified substitute part 310-99-120-41-001000 (Mill-Max Manufacturing Corp.) maintains these core parameters while introducing variations in contact finish composition, insulation material, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

SS-120-TT-2 (Samtec Inc.) is the primary specification when ROHS3 compliance is required. This part maintains active production status with established inventory levels and meets current regulatory requirements for lead-free applications.

310-99-120-41-001000 (Mill-Max Manufacturing Corp.) serves as a functional substitute for applications where RoHS compliance is not mandated. This part provides equivalent mechanical and electrical connectivity with tin-lead contact finish and includes specified current and voltage ratings (3A, 100V/150VDC). The 0.010" (0.25mm) increase in insulation height does not prevent mating with standard 0.100" pitch headers but represents a dimensional variation requiring verification in space-constrained applications.

Selection between these parts depends on regulatory requirements and application constraints rather than functional performance, as both maintain identical core connector specifications and operating temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can the 310-99-120-41-001000 directly replace the SS-120-TT-2 in all applications?

A: Mechanical and electrical compatibility is maintained for standard board-to-board mating applications. However, the substitute part is RoHS non-compliant, making it unsuitable for applications requiring lead-free certification. The 0.010" increase in insulation height must be evaluated in applications with tight vertical clearance constraints.

Q: What is the significance of the contact finish difference between tin and tin-lead?

A: Both finishes provide equivalent electrical conductivity and contact reliability. Tin finish (SS-120-TT-2) complies with ROHS3 requirements. Tin-lead finish (310-99-120-41-001000) is restricted in RoHS-regulated markets but may be specified for legacy systems or applications without lead-free mandates.

Q: Are the insulation materials interchangeable?

A: Both PBT (glass-filled) and PCT (polyester) insulation materials maintain the required operating temperature range of -55°C to 125°C and provide equivalent mechanical support for the contact structure. Material selection does not affect connector functionality in standard applications.

Q: What packaging considerations apply to these parts?

A: SS-120-TT-2 is supplied in bulk packaging, while 310-99-120-41-001000 is supplied in tube packaging. Packaging format affects handling, storage, and automated assembly compatibility but does not impact electrical or mechanical performance.

Q: Why are current and voltage ratings specified for the substitute but not the main part?

A: The provided specifications for SS-120-TT-2 do not include current and voltage ratings. The 310-99-120-41-001000 specifications document 3A current rating and 100V/150VDC voltage rating. Both parts use identical beryllium copper contact material and are suitable for standard logic-level and low-power applications within these electrical parameters.