SC3DF-560 Equivalent & Substitute Parts

Part Overview

The SC3DF-560 is a 56 µH unshielded wirewound inductor manufactured by Signal Transformer, rated for 520 mA continuous current with a maximum DC resistance of 1.52Ohm. 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

SC3DF-560

Signal TransformerIn Stock: 1049SC3DF-560 Datasheet

Current PartRFQ

SDR0703-560KL

Bourns Inc.In Stock: 1116SDR0703-560KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC3DF-560 is determined by the following critical parameters:

• Inductance Value: 56 µH (primary electrical requirement)
• Current Rating: Minimum 520 mA to maintain circuit performance
• DC Resistance: Maximum 1.52Ohm to ensure acceptable power dissipation
• Mounting Type: Surface Mount (SMD) for PCB compatibility
• Operating Temperature Range: -40°C ~ 125°C for environmental compatibility
• Shielding Configuration: Unshielded to match electromagnetic characteristics
• Compliance: ROHS3 and REACH compliance for regulatory alignment

The SDR0703-560KL from Bourns Inc. meets these substitution criteria with compatible electrical specifications and identical operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The SDR0703-560KL is an active product from Bourns Inc. and serves as a functional substitute for the obsolete SC3DF-560. Both components maintain ROHS3 compliance and identical operating temperature specifications. The substitute part offers improved inductance tolerance (±10% versus ±20%) and significantly lower DC resistance (800mOhm versus 1.52Ohm), resulting in reduced power dissipation.

The primary design consideration is the reduced current rating of the SDR0703-560KL (390 mA versus 520 mA). Circuit designs operating at or near the 520 mA specification of the original part must be evaluated to confirm compatibility with the 390 mA rating of the substitute. The improved saturation current (600 mA versus 280 mA) of the substitute part provides additional margin in this regard.

Physical dimensions are nearly identical, with the substitute part being slightly narrower in width (4.50mm versus 4.40mm) and lower in seated height (2.70mm versus 3.10mm), ensuring PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SDR0703-560KL directly replace the SC3DF-560 in all applications?

A: Direct substitution is possible for circuits where the operating current does not exceed 390 mA. Designs requiring the full 520 mA rating of the original part require circuit re-evaluation.

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

A: The SDR0703-560KL provides tighter tolerance (±10%) compared to the SC3DF-560 (±20%), resulting in more predictable circuit performance and reduced design margin requirements.

Q: How does the lower DC resistance of the substitute affect circuit performance?

A: The SDR0703-560KL exhibits 800mOhm maximum DCR versus 1.52Ohm for the original part, reducing resistive losses and heat generation. This improvement is beneficial for power efficiency in most applications.

Q: Are there physical compatibility concerns with the substitute part?

A: The SDR0703-560KL dimensions are nearly identical to the SC3DF-560, with negligible differences in length and width. The reduced height (2.70mm versus 3.10mm) may provide additional PCB clearance in space-constrained designs.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the SC3DF-560 and SDR0703-560KL are ROHS3 compliant and REACH unaffected, meeting identical regulatory standards.

Q: What is the difference between wirewound and drum core construction?

A: The SDR0703-560KL uses drum core construction with ferrite material, while the SC3DF-560 uses standard wirewound construction. Both configurations deliver the specified 56 µH inductance and are suitable for surface mount applications.