SC1608C-1R5 Equivalent & Substitute Parts

Part Overview

The SC1608C-1R5 is a 1.5 µH shielded inductor manufactured by Signal Transformer, rated for 3.24 A continuous current with a maximum DC resistance of 45mOhm. This component is designed for surface mount applications in compact form factors (6.60mm × 4.45mm × 2.92mm). The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

SC1608C-1R5

Signal TransformerIn Stock: 1230SC1608C-1R5 Datasheet

Current PartRFQ

ASPI-0403S-1R5M-T

Abracon LLCIn Stock: 895ASPI-0403S-1R5M-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC1608C-1R5 is determined by the following critical parameters:

• Inductance Value: Must be 1.5 µH (tolerance variations acceptable within design margin)
• Current Rating: Substitute must support minimum 3.24 A continuous current
• DC Resistance: Maximum 45 mOhm to maintain equivalent power dissipation characteristics
• Shielding: Must be shielded to preserve electromagnetic isolation properties
• Physical Footprint: Surface mount package with matching or compatible dimensions (6.60mm × 4.45mm × 2.92mm)
• Compliance: ROHS3 compliance and MSL 1 rating required for manufacturing compatibility

The ASPI-0403S-1R5M-T from Abracon LLC meets the core electrical and mechanical substitution criteria, with the exception of current rating, which is specified at 2.8 A versus the original 3.24 A requirement.

Parameter Comparison

Engineering Selection Recommendations

The ASPI-0403S-1R5M-T is the manufacturer-recommended substitute for the SC1608C-1R5. Both components share identical inductance values, DC resistance specifications, physical dimensions, and compliance certifications (ROHS3, MSL 1).

The primary design consideration is the current rating differential: the substitute part is rated for 2.8 A versus the original 3.24 A. Circuit designs operating at or near the 3.24 A specification limit require thermal and current margin analysis to confirm compatibility with the lower-rated substitute.

The ASPI-0403S-1R5M-T operates within a reduced temperature range (-40°C ~ 85°C) compared to the original part (-40°C ~ 125°C). Applications requiring operation above 85°C must evaluate thermal performance independently.

The substitute part features improved inductance tolerance (±20% versus ±30%), which may provide tighter circuit performance in applications sensitive to inductance variation.

Frequently Asked Questions (FAQ)

Q: Can the ASPI-0403S-1R5M-T be used as a direct replacement for the SC1608C-1R5?

A: The ASPI-0403S-1R5M-T is electrically and mechanically compatible for most applications. The primary constraint is the reduced current rating (2.8 A versus 3.24 A). Direct substitution is valid only when circuit current requirements do not exceed 2.8 A continuous operation.

Q: What is the impact of the current rating difference?

A: The 0.44 A reduction in current rating affects thermal headroom and saturation margin. Circuits designed for 3.24 A operation must be re-evaluated for thermal performance at the lower rating to prevent inductor saturation or excessive temperature rise.

Q: Are the physical dimensions identical?

A: Yes. Both parts share identical surface mount dimensions (6.60mm × 4.45mm × 2.92mm) and are compatible with the same PCB footprint and assembly processes.

Q: What is the significance of the inductance tolerance difference?

A: The substitute part offers tighter tolerance (±20% versus ±30%), which reduces inductance variation across the manufacturing range. This may improve circuit performance in applications sensitive to inductance drift.

Q: Does the reduced operating temperature range affect compatibility?

A: The substitute part operates to 85°C maximum versus 125°C for the original. Applications requiring sustained operation above 85°C must independently verify thermal performance or select an alternative part rated for higher temperatures.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the SC1608C-1R5 and ASPI-0403S-1R5M-T are ROHS3 compliant with MSL 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.