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HomeProductsInductors, Coils, ChokesFixed Inductors4470R-10J
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4470R-10J - API Delevan Inc.

Manufacturer Part Number
4470R-10J
Manufacturer
API Delevan
Allelco Part Number
98D-4470R-10J
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
28,806 pcs available, New & Original
Parts Description
FIXED IND 5.6UH 3A 60 MOHM TH
Package
Axial
Data sheet
4470R-10J.pdf

Datasheets

4470(R) Series.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 28806
  • Unit Price: $3.151
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $3.151 $3.15
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

4470R-10J Tech Specifications
API Delevan Inc. - 4470R-10J technical specifications, attributes, parameters and parts with similar specifications to API Delevan Inc. - 4470R-10J

Product Attribute Attribute Value
Manufacturer API Delevan
Type Molded
Tolerance ±5%
Supplier Device Package -
Size / Dimension 0.310" Dia x 0.910" L (7.87mm x 23.11mm)
Shielding Unshielded
Series 4470R
Ratings -
Q @ Freq 65 @ 7.9MHz
Package / Case Axial
Package Tape & Reel (TR)
Product Attribute Attribute Value
Operating Temperature -55°C ~ 125°C
Mounting Type Through Hole
Material - Core Iron
Inductance Frequency - Test 7.9 MHz
Inductance 5.6 µH
Height - Seated (Max) -
Frequency - Self Resonant 57.6MHz
DC Resistance (DCR) 60mOhm Max
Current Rating (Amps) 3 A
Current - Saturation (Isat) -

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) Not Applicable
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8504.50.8000

Frequently Asked Questions(FAQ)

What are the practical current handling limits of the 4470R-10J, and how does saturation behavior affect circuit design?
The 4470R-10J is rated for 3 A continuous current with a maximum DC resistance of 60 mOhm. No saturation current (Isat) is specified in the datasheet, which is typical for molded inductors with iron cores operating within design margins. This absence of a published saturation point indicates the inductor maintains stable inductance across its full 3 A rating without abrupt flux collapse. In practical buck converter or filtering applications, operating the 4470R-10J below 2.5 A provides a safety margin, allowing for transient current spikes without inductor saturation-induced instability. Designers should verify thermal rise at maximum current; the 60 mOhm DCR will dissipate approximately 540 mW at 3 A, requiring adequate PCB trace sizing to prevent local heating.
How does the 4470R-10J's unshielded design impact electromagnetic compatibility (EMC) and circuit layout?
The 4470R-10J is an unshielded molded inductor, meaning its magnetic field radiates into surrounding space without ferrite or mu-metal containment. In high-frequency switching circuits (especially above 1 MHz), this radiating field can couple into sensitive signal lines, analog circuits, or adjacent components. The self-resonant frequency of 57.6 MHz sets an upper limit for reliable operation; beyond this frequency, the inductor behaves capacitively and loses inductive properties. For EMC-sensitive designs, the 4470R-10J should be positioned with its axis perpendicular to sensitive traces, and ground planes should extend beneath and around the component to attenuate field emissions. In power distribution networks, unshielded inductors like the 4470R-10J are acceptable for bulk filtering but are less suitable for precision analog circuits where magnetic coupling introduces noise.
What is the quality factor (Q) of the 4470R-10J at 7.9 MHz, and what does this mean for circuit efficiency?
The 4470R-10J exhibits a Q factor of 65 at its test frequency of 7.9 MHz. This Q value reflects the ratio of reactive power (inductive reactance) to real power loss (resistive dissipation). A Q of 65 is moderate for an unshielded molded inductor; higher Q values (100+) are achievable with shielded or air-core designs but at greater cost and size. The practical implication is that at frequencies near 7.9 MHz, losses in the 4470R-10J are predictable but not negligible. In resonant tank circuits, tuned filters, or RF applications, the Q of 65 provides reasonable bandwidth control. For power supply switching at 500 kHz to 2 MHz, the 4470R-10J's Q is sufficiently high that resistive losses remain acceptable; however, as frequency approaches the self-resonant point of 57.6 MHz, Q degrades and the component becomes unsuitable.
How do the thermal specifications of the 4470R-10J affect long-term reliability in continuous operation?
The 4470R-10J operates across an industrial temperature range of −55°C to 125°C and is RoHS3 compliant with lead-free terminations. At maximum ambient temperature (125°C) combined with self-heating from the 60 mOhm DCR at 3 A, the junction temperature can exceed 150°C, approaching the limits of molded polymeric materials used in the component body. The material composition (iron core in molded plastic) exhibits stable inductance over this range, but repeated thermal cycling (especially in automotive or industrial environments) can degrade solder joint reliability at the axial leads. For designs requiring extended service life in harsh environments, thermal management should include PCB copper weight sufficient to conduct heat away from the component. In applications with continuous 3 A operation, the 4470R-10J should be derated to 2.0–2.5 A to maintain component temperature below 100°C and extend mean time to failure.
What is the difference between the 4470R-10J and shielded inductors for EMI-sensitive applications?
The primary technical difference is that the 4470R-10J (unshielded) radiates its full magnetic field into the environment, while shielded inductors employ ferrite or mu-metal enclosures to contain the field within the component boundary. Shielded alternatives typically exhibit 10–20 dB lower radiated emissions but suffer from higher parasitic capacitance (lower self-resonant frequency) and increased cost (15–40% premium). The 4470R-10J's unshielded topology yields a higher self-resonant frequency of 57.6 MHz, making it better suited for very high-frequency applications (RF, microwave). However, in mixed-signal systems with analog audio or precision measurement circuits, the unshielded 4470R-10J can introduce magnetic coupling noise into adjacent traces. Engineers should select the 4470R-10J for high-frequency, EMI-tolerant circuits and specify shielded alternatives for noise-critical analog or communication applications sharing the same PCB.
How does the 5.6 µH inductance of the 4470R-10J compare to common values in buck converter design?
The 4470R-10J provides 5.6 µH with ±5% tolerance, a mid-range inductance value widely used in buck converter output filtering and intermediate energy storage. In a typical 12 V to 5 V buck converter at 500 kHz switching frequency, a 5.6 µH inductor produces ripple current of approximately 0.7–1.2 A peak-to-peak at the 4470R-10J's rated 3 A operating point. This ripple magnitude is acceptable for most non-isolated power applications. For comparison, 10 µH inductors reduce ripple but increase transient recovery time and component size; 3.3 µH inductors increase ripple and thermal stress but reduce loop inductance. The 4470R-10J's 5.6 µH value represents a practical compromise, especially when combined with its 60 mOhm DCR. The ±5% tolerance means inductance can range from 5.32 µH to 5.88 µH; circuit designers should model worst-case ripple and regulation within this band to ensure stable loop compensation.
What mounting and thermal considerations are specific to the axial through-hole package of the 4470R-10J?
The 4470R-10J's axial through-hole package (0.910" length, 0.310" diameter) requires PCB holes on 0.950" centers. Axial components like the 4470R-10J dissipate heat primarily through their leads and the solder joints; the body itself is encased in molded plastic with limited thermal conductivity. To optimize thermal performance, PCB traces connected to the 4470R-10J leads should be widened (minimum 20 mils) and extended to copper planes to act as heat sinks. The 0.910" length allows the component body to sit 0.1–0.2" above the PCB surface in standard insertion, leaving an air gap that reduces convective cooling. In high-current designs, selective potting around the 4470R-10J (not covering the body) can improve mechanical stability without trapping heat. For wave soldering, the axial lead design of the 4470R-10J accommodates standard processes; however, lead-free solder (RoHS3 compliance) requires higher peak temperatures (250–260°C) compared to eutectic lead-containing solder, potentially stressing the molded plastic interface.
How do DC resistance variations and tolerance stack affect circuit performance in the 4470R-10J?
The 4470R-10J specifies maximum DC resistance of 60 mOhm with inductance tolerance of ±5%. These specifications are independent; both inductance and DCR can vary across their ranges within a single production batch or across supplier lots. In a buck converter, 60 mOhm DCR at 3 A dissipates 540 mW, representing approximately 5–10% of total converter losses in low-power applications. If the actual 4470R-10J component exhibits lower DCR (e.g., 50 mOhm), efficiency improves but loop feedback may require retuning. Conversely, if DCR reaches 60 mOhm or combines with worst-case inductance (5.32 µH), ripple current increases and output voltage ripple deteriorates. Designers should specify a production screening requirement if DCR tighter than ±10% of nominal is needed, or calculate loop compensation margins assuming 4470R-10J at minimum inductance and maximum DCR simultaneously. This worst-case stack ensures output regulation remains within specification across all component samples.
Is the 4470R-10J suitable for high-frequency RF or only for audio-frequency and switching power applications?
The 4470R-10J can operate at high frequencies up to its self-resonant frequency of 57.6 MHz, but its practical upper frequency limit depends on application demands. At frequencies between 1 MHz and 7.9 MHz (the Q test frequency), the 4470R-10J performs as a linear, low-loss inductor. Between 7.9 MHz and 57.6 MHz, Q factor degrades progressively; at 30 MHz, the component begins to exhibit capacitive behavior alongside inductive reactance, reducing effective inductance and increasing losses. For RF tuning circuits or resonant matching networks at 10–50 MHz, the 4470R-10J is marginal; air-core or specialized RF inductors with self-resonant frequencies exceeding 200 MHz are preferred. However, for switching power supplies at 500 kHz to 5 MHz, wireless charging receiver coils (typically 100–200 kHz), and audio filtering, the 4470R-10J remains reliable and cost-effective. Designers must confirm that operating frequency plus harmonic content remains below 30 MHz to maintain predictable inductive behavior.
What environmental compliance and supply chain considerations affect long-term availability of the 4470R-10J?
The 4470R-10J is RoHS3 compliant (lead-free), REACH-unaffected, and classified under ECCN EAR99 (no export restrictions). These regulatory alignments ensure the 4470R-10J can be procured and deployed in consumer, industrial, and automotive markets without special licensing. However, API Delevan Inc. (the manufacturer) is a mid-scale supplier; the 4470R-10J may face allocation constraints during industry shortages or supply disruptions. Designers should evaluate alternative part numbers in the 4470R series or equivalent inductors from larger manufacturers (e.g., Würth Elektronik, Bourns) to reduce single-source risk. The molded iron-core construction of the 4470R-10J is stable and not subject to material obsolescence; however, if the 4470R-10J is discontinued, identifying drop-in replacements with matching 5.6 µH, 3 A, and 60 mOhm DCR specifications may require re-qualification. For critical applications, designers should maintain a 12-month supply buffer or secure a multi-year supply agreement for the 4470R-10J to mitigate discontinuation risk.
How does the 4470R-10J behave in transient current events, and what circuit protections are recommended?
The 4470R-10J is rated for 3 A continuous current, but inductive components are inherently transient-tolerant due to their energy storage and gradual current rise time. During a short circuit or sudden load change, the 4470R-10J's inductance (5.6 µH) will limit di/dt to a finite rate, typically 100–500 A/µs depending on driving voltage and circuit impedance. At the maximum rated 3 A, the 4470R-10J stores approximately 25 µJ of energy (0.5 × L × I²); if this energy is suddenly released into a protection circuit (e.g., freewheeling diode), the transient voltage spike is manageable if the diode is rated for this energy. In boost converter or flyback applications where the 4470R-10J transfers energy to a secondary circuit, a protection diode (e.g., 1N4007 or Schottky equivalent) placed across the inductor path will clamp overshoot to 0.3–0.7 V beyond the supply rail. For EMI control, a series resistor or ferrite bead on the gate drive of the switching MOSFET can suppress ringing caused by 4470R-10J parasitic resistance and winding capacitance.
What is the cost-to-performance trade-off of the 4470R-10J compared to ferrite-core alternatives?
The 4470R-10J (molded iron core) typically costs 20–40% less than equivalent ferrite-core inductors with similar inductance, current, and package size. Iron cores provide stable inductance across temperature and frequency (−55°C to 125°C), whereas ferrite cores exhibit inductance variation with temperature (typically ±10% over the operating range). The 4470R-10J's 60 mOhm DCR is also favorable; comparable ferrite designs may exhibit 50–80 mOhm DCR. The trade-off is that the 4470R-10J is unshielded, producing higher radiated emissions than shielded ferrite alternatives. In price-sensitive consumer electronics or distributed power applications where EMI is not a primary concern, the 4470R-10J delivers superior value. In noise-critical or regulatory-constrained environments (medical, automotive), shielded ferrite inductors justify the premium. Engineers should prototype both the 4470R-10J and a ferrite reference to measure actual EMI and thermal performance in the final application before committing to high-volume production.
How should PCB layout and grounding be optimized around the 4470R-10J to minimize noise coupling and improve efficiency?
The 4470R-10J's unshielded geometry and axial lead configuration make PCB layout critical for noise performance. The component should be placed on the primary power layer side of the PCB, with the axis oriented perpendicular to sensitive analog or communication traces to minimize magnetic coupling. Lead traces connected to the 4470R-10J should be routed away from high-impedance nodes (ADC inputs, reference pins) and run directly to ground planes or return paths. A ground plane beneath the 4470R-10J (within 0.1–0.2 inches of the component) will attenuate radiated magnetic fields and reduce unintended coupling into adjacent circuits. The 4470R-10J's input and output traces should be separated by at least 0.2 inches to prevent parasitic coupling between the switching node and load output. For applications with multiple 4470R-10J inductors, spacing them 1 inch apart and orienting their axes in orthogonal directions (one horizontal, one vertical) further reduces mutual inductance. Thermal vias (multiple 0.010–0.015" via holes) placed around the solder joints of the 4470R-10J will conduct heat from the component body to inner copper planes, lowering operating temperature by 5–15°C.

Parts with Similar Specifications

The three parts on the right have similar specifications to API Delevan Inc. 4470R-10J

Product Attribute 4470R-09J 4470R-11J 4470R-10G 4470R-10H
Part Number 4470R-09J 4470R-11J 4470R-10G 4470R-10H
Manufacturer API Delevan Inc. API Delevan Inc. API Delevan Inc. API Delevan Inc.
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Series - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Inductance Frequency - Test - - - -
Current - Saturation (Isat) - - - -
Tolerance - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Material - Core - - - -
Shielding - - - -
Inductance - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Ratings - - - -
Q @ Freq - - - -
Current Rating (Amps) - - - -
Type - - - -
Frequency - Self Resonant - - - -
Size / Dimension - - - -
Height - Seated (Max) - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
DC Resistance (DCR) - - - -

4470R-10J Datasheet PDF

Download 4470R-10J pdf datasheets and API Delevan Inc. documentation for 4470R-10J - API Delevan Inc..

Datasheets
4470(R) Series.pdf

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API Delevan Inc.

4470R-10J

API Delevan Inc.
98D-4470R-10J

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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