SC3DF-151 Equivalent & Substitute Parts

Part Overview

The SC3DF-151 is a 150 µH unshielded wirewound inductor manufactured by Signal Transformer, rated for 330 mA continuous current with a maximum DC resistance of 4.13Ohm. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part operates across the industrial temperature range of -40°C to 125°C and is fully RoHS3 compliant.

Substiute Parts

SC3DF-151

Signal TransformerIn Stock: 1158SC3DF-151 Datasheet

Current PartRFQ

SDR0703-151ML

Bourns Inc.In Stock: 1082SDR0703-151ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC3DF-151 is determined by the following critical parameters:

• Inductance Value: 150 µH ±20% tolerance
• Current Rating: Minimum 330 mA continuous current capability
• DC Resistance: Maximum 4.13Ohm to maintain circuit performance
• Mounting Type: Surface mount configuration
• Operating Temperature Range: -40°C to 125°C
• Shielding Configuration: Unshielded
• Compliance: RoHS3 and REACH compliance required

The Bourns SDR0703-151ML meets these substitution criteria with equivalent inductance, compatible temperature range, and superior current handling characteristics. Both components share identical inductance specifications, surface mount packaging, and full regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The SDR0703-151ML is a direct functional equivalent for the obsolete SC3DF-151. Both components maintain identical inductance values and tolerance specifications at the 100 kHz test frequency. The substitute part offers improved electrical characteristics with lower DC resistance (2Ohm vs. 4.13Ohm maximum) and higher saturation current (340 mA vs. 170 mA), providing enhanced performance margins in the target application.

Both parts maintain full RoHS3 and REACH compliance, ensuring regulatory compatibility across all markets. The active product status of the SDR0703-151ML ensures long-term availability and supply chain continuity, addressing the obsolescence of the original SC3DF-151.

Frequently Asked Questions (FAQ)

Q: Can the SDR0703-151ML directly replace the SC3DF-151 in existing designs?

A: Yes. Both inductors share identical 150 µH inductance values with ±20% tolerance and operate across the same -40°C to 125°C temperature range. The substitute part features lower DC resistance and higher saturation current, providing improved performance characteristics.

Q: What is the impact of the lower current rating on the SDR0703-151ML?

A: The SDR0703-151ML is rated for 250 mA continuous current versus the SC3DF-151's 330 mA rating. Circuit designs operating below 250 mA will experience no functional impact. Applications requiring currents between 250 mA and 330 mA require thermal and performance analysis to confirm suitability.

Q: Are there physical dimension differences between these parts?

A: Both components use nonstandard surface mount packages with similar footprints. The SC3DF-151 measures 0.256" L × 0.173" W × 0.122" H (6.50mm × 4.40mm × 3.10mm). The SDR0703-151ML measures 0.256" L × 0.177" W × 0.106" H (6.50mm × 4.50mm × 2.70mm). Length is identical; width and height variations are minimal and typically accommodate standard PCB layouts.

Q: Do both parts meet current compliance requirements?

A: Yes. Both the SC3DF-151 and SDR0703-151ML are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for industrial and commercial applications.

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

A: The SDR0703-151ML's 2Ohm maximum DCR compared to the SC3DF-151's 4.13Ohm maximum reduces resistive losses and heat generation in the inductor. This improvement enhances circuit efficiency and thermal performance, particularly in applications with sustained current flow.