SC2506-471 Equivalent & Substitute Parts

Part Overview

The SC2506-471 is a 470 µH unshielded surface mount inductor manufactured by Signal Transformer, rated for 160 mA continuous current with a maximum DC resistance of 12Ohm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The unshielded construction and nonstandard package configuration require careful evaluation when selecting alternative components to maintain circuit performance and physical compatibility.

Substiute Parts

SC2506-471

Signal TransformerIn Stock: 1043SC2506-471 Datasheet

Current PartRFQ

SRR0805-471K

Bourns Inc.In Stock: 887SRR0805-471K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC2506-471 is based on the following critical parameters:

Inductance Value: The substitute must provide 470 µH ±10% to ±20% tolerance to maintain circuit functionality within acceptable operating ranges.

Current Rating: The substitute must support a minimum continuous current rating of 160 mA. The SRR0805-471K exceeds this requirement at 200 mA, providing design margin.

DC Resistance: The substitute's DCR must be evaluated against circuit requirements. The SRR0805-471K provides 2.25Ohm Max, which is significantly lower than the original 12Ohm Max specification.

Saturation Current: The substitute's Isat must exceed the operating current to prevent core saturation. The SRR0805-471K provides 350 mA Isat versus the original 140 mA.

Surface Mount Compatibility: Both components are surface mount devices suitable for automated assembly.

Compliance & Certifications: Both parts maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status, ensuring regulatory continuity.

Parameter Comparison

Engineering Selection Recommendations

The SRR0805-471K from Bourns Inc. is an active product with equivalent inductance value and superior electrical performance characteristics. Key advantages include higher current rating (200 mA vs. 160 mA), significantly lower DC resistance (2.25Ohm vs. 12Ohm), and higher saturation current (350 mA vs. 140 mA). Both components maintain identical RoHS3 compliance and MSL 1 moisture sensitivity ratings.

Physical compatibility requires evaluation: the SRR0805-471K is slightly larger in length (0.413" vs. 0.364") and width (0.315" vs. 0.310"), with substantially greater height (0.185" vs. 0.065"). PCB layout and clearance verification is necessary before implementation.

The substitute's shielded construction differs from the original unshielded design. In applications where electromagnetic interference rejection is beneficial, this represents an improvement. In circuits sensitive to shielding effects, electromagnetic modeling may be required.

Frequently Asked Questions (FAQ)

Q: Can the SRR0805-471K directly replace the SC2506-471 without circuit modification?

A: Both components provide 470 µH inductance and surface mount compatibility. However, the substitute's lower DC resistance (2.25Ohm vs. 12Ohm) will reduce power dissipation in the inductor. Circuit performance depends on whether the original 12Ohm resistance was intentional for damping or filtering. PCB layout changes are required due to dimensional differences.

Q: What are the physical compatibility constraints?

A: The SRR0805-471K requires additional PCB space: 0.049" greater length, 0.005" greater width, and 0.120" greater height. Verify clearance with adjacent components and confirm that the increased height does not violate assembly or enclosure constraints.

Q: How do the electrical performance differences affect circuit operation?

A: The substitute provides higher current capacity (200 mA vs. 160 mA) and saturation current (350 mA vs. 140 mA), reducing risk of core saturation. The lower DC resistance decreases resistive losses. The tighter inductance tolerance (±10% vs. ±20%) improves value consistency. The shielded construction provides electromagnetic containment compared to the unshielded original.

Q: Are compliance certifications equivalent?

A: Both components are ROHS3 compliant, maintain MSL 1 moisture sensitivity rating, and are REACH unaffected. Regulatory continuity is maintained for applications requiring these certifications.

Q: What is the inductance frequency test difference?

A: The original part specifies inductance measurement at 100 kHz, while the substitute uses 1 kHz. This reflects different measurement standards but does not affect the 470 µH nominal value at operating frequencies.