SCR105B-180 Equivalent & Substitute Parts

Part Overview

The SCR105B-180 is a 18 µH shielded inductor manufactured by Signal Transformer, rated for 3.24 A continuous current with a maximum DC resistance of 80mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity. Substitute parts must maintain electrical performance within the specified inductance, current rating, and resistance parameters while accommodating mechanical and thermal constraints of the application.

Substiute Parts

SCR105B-180

Signal TransformerIn Stock: 924SCR105B-180 Datasheet

Current PartRFQ

ASPI-104S-180M-T

Abracon LLCIn Stock: 847ASPI-104S-180M-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCR105B-180 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Inductance value: 18 µH (±20% tolerance acceptable)
• Current rating: minimum 3.2 A continuous
• DC resistance: maximum 80mOhm (lower values acceptable)
• Shielding: shielded construction required

Mechanical Compatibility Criteria:

• Mounting type: surface mount
• Package classification: nonstandard form factor
• Physical dimensions: compatible with PCB footprint constraints

Environmental & Compliance Criteria:

• Operating temperature range: minimum -40°C to 85°C
• RoHS3 compliance required
• REACH unaffected status

The ASPI-104S-180M-T from Abracon LLC meets all electrical and mechanical substitution requirements while maintaining active product status and full compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The ASPI-104S-180M-T is a direct functional substitute for the obsolete SCR105B-180. Selection is supported by:

Product Status: The ASPI-104S-180M-T maintains active manufacturing status, ensuring long-term availability and supply chain stability compared to the obsolete SCR105B-180.

Electrical Performance: The substitute part delivers equivalent inductance and tolerance specifications. The lower DC resistance (65.6mOhm vs. 80mOhm maximum) and higher saturation current (2.7A vs. 1.58A) represent performance improvements that do not compromise circuit compatibility.

Compliance & Certifications: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent component selection.

Thermal Considerations: The ASPI-104S-180M-T operates to 85°C maximum, which is acceptable for applications designed within the -40°C to 85°C range. Applications requiring operation above 85°C must be evaluated against specific thermal requirements.

Mechanical Fit: Both components are surface mount, nonstandard form factor inductors. Physical dimensions differ slightly (ASPI-104S-180M-T: 10.10mm L × 10.00mm W × 4.00mm H vs. SCR105B-180: 10.50mm L × 9.50mm W × 5.50mm H). PCB footprint compatibility must be verified for the specific application.

Frequently Asked Questions (FAQ)

Q: Can the ASPI-104S-180M-T replace the SCR105B-180 in all applications?

A: The ASPI-104S-180M-T is electrically and mechanically compatible for applications operating within -40°C to 85°C. Applications requiring operation above 85°C require thermal analysis. Physical dimensions differ; PCB footprint compatibility must be confirmed.

Q: What is the significance of the lower DC resistance in the substitute part?

A: The ASPI-104S-180M-T exhibits 65.6mOhm maximum DC resistance compared to 80mOhm in the SCR105B-180. Lower resistance reduces I²R losses and heat generation, representing a performance improvement. This does not affect substitution compatibility.

Q: Are there packaging differences between these parts?

A: The SCR105B-180 is supplied in nonstandard packaging; the ASPI-104S-180M-T is supplied in Tape & Reel (TR) format. Both are surface mount components. Procurement and handling procedures may differ accordingly.

Q: Why is the saturation current higher in the substitute part?

A: The ASPI-104S-180M-T (Isat: 2.7A) exhibits higher saturation current than the SCR105B-180 (Isat: 1.58A). This indicates improved core material performance and represents an advantage for applications approaching saturation limits.

Q: What compliance certifications apply to both parts?

A: Both the SCR105B-180 and ASPI-104S-180M-T are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.