SC1704-1R5 Equivalent & Substitute Parts

Part Overview

The SC1704-1R5 is a 1.5 µH unshielded surface mount inductor manufactured by Signal Transformer, rated for 1.5 A continuous current with a maximum DC resistance of 140mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives 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

SC1704-1R5

Signal TransformerIn Stock: 947SC1704-1R5 Datasheet

Current PartRFQ

SDR6603-1R5M

Bourns Inc.In Stock: 787SDR6603-1R5M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC1704-1R5 is determined by the following critical parameters:

• Inductance Value: Must be 1.5 µH at 100 kHz test frequency
• Shielding Configuration: Unshielded topology required
• Mounting Type: Surface mount package mandatory
• Operating Temperature Range: Minimum -40°C to 125°C coverage
• Current Handling: Substitute must support minimum 1.5 A continuous current rating
• DC Resistance: Lower DCR values are acceptable; higher values require circuit validation
• Compliance: ROHS3 and REACH compliance maintained

The SDR6603-1R5M qualifies as a direct substitute based on matching inductance value, unshielded configuration, surface mount packaging, and identical operating temperature range. The substitute provides superior electrical performance with higher current rating (2.8 A vs. 1.5 A) and lower DC resistance (50 mOhm vs. 140 mOhm).

Parameter Comparison

Engineering Selection Recommendations

The SDR6603-1R5M is the qualified substitute for SC1704-1R5 applications. Selection is supported by:

• Compliance Continuity: Both components maintain ROHS3 and REACH compliance status
• Active Product Status: SDR6603-1R5M is actively manufactured by Bourns Inc., ensuring long-term availability and supply chain stability
• Electrical Compatibility: Identical inductance value and operating temperature range ensure functional equivalence in circuit applications
• Performance Enhancement: The substitute provides improved electrical characteristics with higher current rating and lower DC resistance, reducing thermal dissipation in the inductor element

Frequently Asked Questions (FAQ)

Q: Can SDR6603-1R5M be used as a direct replacement for SC1704-1R5?

A: Yes. Both components share identical inductance values (1.5 µH), unshielded configuration, surface mount packaging, and operating temperature range (-40°C to 125°C). The substitute meets or exceeds all critical electrical parameters of the original part.

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

A: SC1704-1R5 measures 0.264" L × 0.220" W × 0.043" H (6.70mm × 5.60mm × 1.10mm). SDR6603-1R5M measures 0.260" L × 0.175" W × 0.115" H (6.60mm × 4.45mm × 2.92mm). The substitute is slightly shorter in length and width but taller in seated height. PCB layout verification is required for height-constrained applications.

Q: Does the lower DC resistance of SDR6603-1R5M affect circuit operation?

A: Lower DC resistance (50 mOhm vs. 140 mOhm) reduces resistive losses and heat generation. This is a beneficial characteristic that improves efficiency. No circuit modifications are required.

Q: Are there packaging differences between these inductors?

A: SC1704-1R5 packaging details are listed as nonstandard. SDR6603-1R5M is supplied in Tape & Reel (TR) format. Both are surface mount components with identical moisture sensitivity level (MSL 1).

Q: What is the inductance tolerance difference impact?

A: SC1704-1R5 has ±30% tolerance; SDR6603-1R5M has ±20% tolerance. The tighter tolerance of the substitute provides improved inductance value consistency across production batches.