SC1704-150 Equivalent & Substitute Parts

Part Overview

The SC1704-150 is a 15 µH unshielded inductor manufactured by Signal Transformer, rated for 600 mA continuous current with a maximum DC resistance of 660mOhm. 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

SC1704-150

Signal TransformerIn Stock: 905SC1704-150 Datasheet

Current PartRFQ

SDR6603-150M

Bourns Inc.In Stock: 1166SDR6603-150M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC1704-150 is determined by the following critical parameters:

• Inductance Value: Must be 15 µH with ±20% tolerance
• Current Rating: Substitute must support minimum 600 mA continuous current
• Saturation Current: Substitute saturation current must meet or exceed 400 mA
• DC Resistance: Lower DCR values are acceptable; higher values may increase power dissipation
• Shielding Configuration: Unshielded topology must be maintained
• Surface Mount Compatibility: Mounting type must remain surface mount
• Temperature Range: Operating range must encompass -40°C to 125°C
• Compliance: ROHS3 compliance required

The SDR6603-150M from Bourns Inc. meets all substitution criteria with improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SDR6603-150M is the qualified substitute for the obsolete SC1704-150. Selection is based on the following factors:

• Product Status: The SC1704-150 is obsolete; the SDR6603-150M is active and maintains long-term availability
• Electrical Compatibility: Both parts maintain identical inductance values and tolerance specifications at the 100 kHz test frequency
• Current Handling: The SDR6603-150M provides superior current rating (1 A vs. 600 mA) and saturation current (900 mA vs. 400 mA), ensuring adequate margin for the original application
• Resistance Performance: The SDR6603-150M exhibits significantly lower DC resistance (230 mOhm vs. 660 mOhm), reducing power dissipation and thermal effects
• Compliance Alignment: Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings
• Temperature Range: Operating temperature specifications are identical across both parts

Frequently Asked Questions (FAQ)

Q: Can the SDR6603-150M directly replace the SC1704-150 in existing designs?

A: Yes. Both parts maintain identical inductance values, tolerance specifications, shielding configuration, and operating temperature ranges. The substitute provides improved electrical performance with higher current ratings and lower DC resistance.

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

A: The SC1704-150 measures 0.264" L × 0.220" W × 0.043" H (6.70mm × 5.60mm × 1.10mm). The SDR6603-150M measures 0.260" L × 0.175" W × 0.115" H (6.60mm × 4.45mm × 2.92mm). Length and width are comparable; height differs due to core construction differences. PCB layout verification is required.

Q: Are there packaging differences?

A: The SC1704-150 packaging specification is listed as nonstandard. The SDR6603-150M is supplied in Tape & Reel (TR) format, which is standard for high-volume procurement and automated assembly.

Q: Why is the DC resistance lower in the substitute part?

A: The SDR6603-150M uses a drum core, wirewound construction with ferrite core material, whereas the SC1704-150 construction details are not specified. Lower DCR reduces I²R losses and improves efficiency in the application circuit.

Q: Are both parts RoHS compliant?

A: Yes. Both the SC1704-150 and SDR6603-150M are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.