SC1704-151 Equivalent & Substitute Parts

Part Overview

The SC1704-151 is a 150 µH unshielded inductor manufactured by Signal Transformer, rated for 190 mA continuous current with a maximum DC resistance of 6.4Ohm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant.

Substiute Parts

SC1704-151

Signal TransformerIn Stock: 1038SC1704-151 Datasheet

Current PartRFQ

SDR6603-151M

Bourns Inc.In Stock: 828SDR6603-151M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC1704-151 is determined by the following critical parameters:

• Inductance Value: 150 µH at 100 kHz test frequency with ±20% tolerance
• Current Rating: Minimum 190 mA continuous current capability
• DC Resistance: Maximum 6.4Ohm to maintain circuit performance
• Mounting Type: Surface mount configuration
• Operating Temperature Range: -40°C to 125°C
• Shielding Configuration: Unshielded topology
• Compliance: ROHS3 and REACH compliance required

The SDR6603-151M from Bourns Inc. meets these substitution criteria with equivalent inductance, superior current handling, and improved DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SDR6603-151M qualifies as a direct substitute for the obsolete SC1704-151 based on the following factors:

• Electrical Equivalence: Both parts maintain 150 µH inductance at 100 kHz with identical ±20% tolerance specifications.
• Current Capability: The SDR6603-151M provides 250 mA continuous current rating, exceeding the SC1704-151 requirement of 190 mA, with saturation current of 270 mA versus 130 mA.
• Resistance Performance: The SDR6603-151M delivers superior DC resistance of 2Ohm maximum, compared to 6.4Ohm maximum of the original part, reducing power dissipation.
• Regulatory Compliance: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical MSL rating of 1 (unlimited moisture sensitivity level).
• Thermal Compatibility: Operating temperature range of -40°C to 125°C is identical across both parts.
• Product Status: The SDR6603-151M is active production status, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the SDR6603-151M directly replace the SC1704-151 in existing designs?

A: Yes. Both parts share identical inductance value (150 µH), tolerance (±20%), operating temperature range (-40°C to 125°C), shielding configuration (unshielded), and surface mount packaging. The SDR6603-151M exceeds the current rating and saturation current specifications while providing lower DC resistance.

Q: What are the physical dimension differences between these parts?

A: The SC1704-151 measures 0.264" L x 0.220" W x 0.043" H (6.70mm x 5.60mm x 1.10mm). The SDR6603-151M measures 0.260" L x 0.175" W x 0.115" H (6.60mm x 4.45mm x 2.92mm). The substitute is slightly shorter in length and width but taller in seated height. PCB layout verification is required.

Q: Are there compliance or certification differences?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. MSL ratings are identical at level 1 (unlimited). No compliance barriers exist for substitution.

Q: What is the significance of the improved DC resistance in the SDR6603-151M?

A: The SDR6603-151M DC resistance of 2Ohm maximum versus 6.4Ohm maximum in the SC1704-151 results in lower resistive losses and reduced heat generation at rated current levels, improving overall circuit efficiency.

Q: Is packaging format compatible between these parts?

A: The SC1704-151 is supplied in nonstandard packaging. The SDR6603-151M is supplied in Tape & Reel (TR) format. Reel compatibility with existing pick-and-place equipment must be verified during procurement.