OSTTT024180 Terminal Block Plug - Equivalent & Substitute Parts

Part Overview

The OSTTT024180 is a 2-position terminal block plug manufactured by On Shore Technology Inc., designed for unshrouded headers with 0.150" (3.81mm) pitch spacing. This component features screw termination, free-hanging in-line mounting, and operates across -40°C to 115°C. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and procurement planning.

Substiute Parts

OSTTT024180

On Shore Technology Inc.In Stock: 1026OSTTT024180 Datasheet

Current PartRFQ

A-TB381-TT02

Assmann WSW ComponentsIn Stock: 851A-TB381-TT02 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OSTTT024180 is determined by strict equivalence across the following critical parameters:

• Connector Type: Plug for unshrouded header
• Position Count: 2 positions
• Pitch Spacing: 0.150" (3.81mm)
• Termination Method: Screw
• Mounting Configuration: Free hanging (in-line)
• Voltage Rating: 300 V UL
• Wire Gauge Compatibility: 16-28 AWG
• Operating Temperature Range: -40°C to 115°C
• Contact Material: Phosphor bronze
• Housing Material: Thermoplastic
• Flammability Compliance: UL94 V-0
• Regulatory Compliance: ROHS3 compliant

The substitute part A-TB381-TT02 (Assmann WSW Components) maintains equivalence across all critical electrical and mechanical parameters. Differences in wire entry orientation (90° vs. straight) and color designation do not affect functional substitution when mechanical routing accommodates the wire entry angle.

Parameter Comparison

Engineering Selection Recommendations

The A-TB381-TT02 serves as the direct functional equivalent for OSTTT024180 applications. Both components maintain identical electrical specifications (300 V UL, 16-28 AWG wire gauge compatibility) and mechanical compatibility (2-position, 3.81mm pitch, screw termination, free-hanging mounting). Both meet UL94 V-0 flammability requirements and ROHS3 compliance standards.

The primary distinction is product status: OSTTT024180 is obsolete while A-TB381-TT02 is active production. For new designs or system refreshes, A-TB381-TT02 is the recommended selection. For legacy system maintenance where OSTTT024180 inventory exists, direct substitution with A-TB381-TT02 is permissible without design modification, provided the 90° wire entry orientation can be accommodated in the mechanical layout.

Frequently Asked Questions (FAQ)

Q: Can A-TB381-TT02 directly replace OSTTT024180 in existing assemblies?

A: Yes. Both components share identical pitch spacing (3.81mm), position count (2), termination method (screw), voltage rating (300 V), wire gauge range (16-28 AWG), and operating temperature range (-40°C to 115°C). The primary consideration is wire entry orientation: A-TB381-TT02 features 90° entry versus straight entry on OSTTT024180. Mechanical routing must accommodate this difference.

Q: Are there compliance or certification differences between these parts?

A: No. Both components are ROHS3 compliant, REACH unaffected, and carry UL94 V-0 flammability ratings. Both use phosphor bronze contacts with tin mating finish and thermoplastic housings.

Q: What is the significance of the different wire entry angles?

A: Wire entry angle affects physical routing in the assembly. The 90° entry on A-TB381-TT02 requires perpendicular wire approach compared to the straight entry configuration. This is a mechanical consideration only and does not affect electrical performance or compatibility with the mating unshrouded header.

Q: Why is OSTTT024180 listed as obsolete?

A: Obsolescence indicates the part is no longer in active production. For procurement of new inventory or system redesigns, A-TB381-TT02 is the active alternative.

Q: Are screw torque specifications identical?

A: Yes. Both components specify 0.2 Nm (1.7 Lb-In) screw torque, ensuring consistent assembly procedures across both parts.