S1008-472K Equivalent & Substitute Parts

Part Overview

The S1008-472K is a fixed surface mount inductor manufactured by API Delevan Inc. with an inductance value of 4.7 µH, rated for 305 mA continuous current, and a maximum DC resistance of 1.2 Ohm. This shielded ferrite core inductor is designed for high-frequency applications with a self-resonant frequency of 42 MHz and operates across the temperature range of -55°C to 125°C. The component is packaged in the 1008 (2520 Metric) form factor for automated assembly processes. Substitute parts are identified when equivalent electrical and mechanical specifications are maintained within the same package and performance envelope.

Substiute Parts

S1008-472K

API Delevan Inc.In Stock: 1038S1008-472K Datasheet

Current PartRFQ

S1008R-472K

API Delevan Inc.In Stock: 4290S1008R-472K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S1008-472K are identified based on strict equivalence of electrical and mechanical parameters. The substitution criteria are:

Primary Equivalence Parameters:

• Inductance value: 4.7 µH with ±10% tolerance
• Current rating: 305 mA minimum
• DC resistance: 1.2 Ohm maximum
• Core material: Ferrite with shielding
• Package: 1008 (2520 Metric) surface mount
• Physical dimensions: 0.115" L x 0.105" W with 0.095" max height
• Operating temperature: -55°C to 125°C
• Q factor: 30 @ 7.9 MHz
• Self-resonant frequency: 42 MHz

The S1008R-472K is classified as a direct substitute because it maintains all electrical specifications and mechanical compatibility with the main part while differing only in product series designation and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The S1008R-472K serves as a direct electrical and mechanical substitute for the S1008-472K. Both components are manufactured by API Delevan Inc. and maintain identical electrical performance specifications across all critical parameters including inductance, current rating, DC resistance, frequency response, and operating temperature range.

The primary distinction between these parts is regulatory compliance status. The S1008-472K is RoHS non-compliant, while the S1008R-472K is ROHS3 compliant. Selection between these parts should be based on the regulatory requirements of the end application and target market. Both components maintain REACH Unaffected status and are classified under ECCN EAR99 and HTSUS 8504.50.8000.

Both parts are currently in active production status with established supply availability. The S1008R-472K variant shows higher inventory levels (4240 Pcs) compared to the S1008-472K (1028 Pcs), which may influence procurement decisions based on lead time and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can the S1008R-472K be used as a direct replacement for the S1008-472K in all applications?

A: The S1008R-472K is electrically and mechanically equivalent to the S1008-472K. Substitution is valid when the application does not have specific restrictions against ROHS3 compliant components. Both parts maintain identical inductance, current rating, DC resistance, frequency response, and thermal operating range.

Q: What is the difference between the S1008-472K and S1008R-472K part numbers?

A: The primary difference is the series designation (S1008 versus S1008R) and associated RoHS compliance status. The S1008-472K is RoHS non-compliant, while the S1008R-472K is ROHS3 compliant. All electrical and mechanical specifications remain identical.

Q: Are both parts compatible with the same PCB footprint and assembly process?

A: Yes. Both the S1008-472K and S1008R-472K use the identical 1008 (2520 Metric) package with surface mount mounting type. Physical dimensions, height, and tape & reel packaging are identical, ensuring compatibility with the same PCB layout and automated assembly equipment.

Q: What is the significance of the ±10% inductance tolerance?

A: The ±10% tolerance indicates that the actual inductance value will fall within the range of 4.23 µH to 5.17 µH. This tolerance applies to both the S1008-472K and S1008R-472K and must be considered during circuit design to ensure proper frequency response and impedance matching.

Q: How does the Q factor of 30 @ 7.9 MHz affect component selection?

A: The Q factor of 30 at the test frequency of 7.9 MHz indicates the quality factor of the inductor at that specific frequency. This parameter is identical for both the S1008-472K and S1008R-472K and represents the ratio of reactance to resistance. Higher Q factors indicate lower losses and better performance in resonant circuits.

Q: What does the 42 MHz self-resonant frequency indicate?

A: The self-resonant frequency (SRF) of 42 MHz is the frequency at which the inductor's parasitic capacitance resonates with its inductance, causing the impedance to peak. Both parts share this specification and should not be used in applications requiring operation above this frequency without accounting for impedance changes.

Q: Is the 305 mA current rating a continuous or peak rating?

A: The 305 mA current rating specified for both the S1008-472K and S1008R-472K represents the continuous current rating. Operation above this level may result in inductor saturation and performance degradation.

Q: What does MSL 1 (Unlimited) moisture sensitivity level mean?

A: MSL 1 (Unlimited) indicates that both the S1008-472K and S1008R-472K have no moisture sensitivity restrictions. These components do not require special moisture control during storage, handling, or assembly processes.