SFAPI BEL | Alldatasheet

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Technical content

belfuse.com/signal SFAPI Series Fixed Axial Power Inductors The SFAPI Series is an entirely new line of fixed axial leaded power inductors. When the current flowing through the coil changes, the time- varying magnetic field induces a counter electromotive force in the conductor which opposes the change in current that created it. As such, inductors oppose any changes in current that pass through them. In power supplies, an inductor’s role is to prevent sudden changes in current used. Working alongside a capacitor, an inductor prevents sudden changes in the power supply’s output voltage and current. Due to the ferrite core material grade, these fixed power inductors have high permeability, increased electrical resistivity, and low eddy current losses such that their characteristics make them suitable for multiple high- frequency applications. Power Inductors are used in variety of functions including differential mode filtering, as output chokes and energy storage devices in power supply topologies such a buck, boost, SEPIC and Cuk etc. General Features

  • High current choke
  • Wide inductance range
  • High saturation ferrite core
  • UL rated shrink tube covering
  • Low-cost power inductor
  • Available in Tape & Reel packaging Specifications
  • Wide inductance range 27 µH to 4.7 mH (1.28 A ~ 0.1 A)
  • High current choke
  • High saturation ferrite core
  • Operating temperature range: -40 °C to +125 °C
  • Storage temperature component: -40 °C to +125 °C

Applications

  • Switching regulators
  • Power Amplifiers, inverters and converters
  • Power Supplies (buck, boost, SEPIC, Cuk)
  • SCR and Triac controls
  • Speaker crossover networks
  • RFI suppression filters / RFI tuning coils
  • Various other applications (i.e. snubber circuits etc.) RoHS Compliant

belfuse.com/signal

128 Atlantic Avenue, Lynbrook, NY 11563

Toll Free 866-239-5777 | Tel 516-239-5777 | Fax 516-239-7208 sales@signaltransformer.com | techhelp@signaltransformer.com Custom versions available upon request. © 2022 Signal Transformer Specifications subject to change without notice. SFAPI Series Dec 16 2022 SFAPI Series RoHS Compliant PRODUCT IDENTIFICATION MECHANICAL SPECIFICATIONS Dimensions are in mm.

6.6 MAX SCHEMATIC

38.0±0.316.5 MAX 0.8±0.1 38.0±0.3 SFAPI = Signal Fixed Axial Power Inductors SFAPI - 470 K - UL - TR 470 = 47 μH * Note: Expressed by three figures. The unit is micro henry (μH). The first and second figures are significant digits, the third figure expresses the number of zeros which follow the two figures. If there is a decimal point, it is expressed by the capital letter “R” (3R9 = 3.9 μH). In that case, all figures are significant digits. Inductance * Type / Product Series Sleeve TR = Tape & Reel No code = Bulk UL = UL Tape (black) K = ±10% Inductance Tolerance Packaging

belfuse.com/signal Toll Free 866-239-5777 | Tel 516-239-5777 | Fax 516-239-7208 sales@signaltransformer.com | techhelp@signaltransformer.com Custom versions available upon request. © 2022 Signal Transformer Specifications subject to change without notice. SFAPI Series Dec 16 2022 SFAPI Series RoHS Compliant ELECTRICAL SPECIFICATIONS Electrical specifications for all part numbers measured at 25°C unless otherwise stated. Part Number Inductance @ 1 kHz (µH) DCR Max (Ω) Temperature Rise Current Max. (A) SFAPI-270K-UL 27 0.058 1.280 SFAPI-330K-UL 33 0.075 1.008 SFAPI-470K-UL 47 0.109 0.804 SFAPI-101K-UL 100 0.208 0.632 SFAPI-471K-UL 470 1.150 0.315 SFAPI-681K-UL 680 1.610 0.250 SFAPI-102K-UL 1000 2.300 0.200 SFAPI-122K-UL 1200 2.650 0.200 SFAPI-182K-UL 1800 4.030 0.158 SFAPI-222K-UL 2200 4.480 0.158 SFAPI-332K-UL 3300 6.560 0.125 SFAPI-472K-UL 4700 10.50 0.100 Notes: 1) I sat: The current when the inductance becomes 10% lower than its initial value (Ta = 20°C). 2) I rms: The current when temperature of coil increase up to max. ΔT ≤ 40°C (Ta = 20°C).

  • Test equipment L: measured on Agilent 4284A LCR meter or equivalent DCR: measured on Chroma 16502 micro-OHM meter or equivalent I sat & I rms: measured on Agilent 4284A LCR meter with 42841A Current Source or equivalent.
  • Notice: Please read Cautions and Warnings and Notes for electrical characteristics test at the end of this document INDUCTANCE VS DC CURRENT CURVE 100 1000 10000 100000 )Hu( L DC Current (A) 102 183 100 1000 0 1 2 3 4 5 6 7 8 9 )Hu( L DC Current (A) 3R9 221 470

belfuse.com/signal Toll Free 866-239-5777 | Tel 516-239-5777 | Fax 516-239-7208 sales@signaltransformer.com | techhelp@signaltransformer.com Custom versions available upon request. © 2022 Signal Transformer Specifications subject to change without notice. SFAPI Series Dec 16 2022 SFAPI Series RoHS Compliant RECOMMENDED REFLOW SOLDERING CONDITIONS (DIP-TYP) s 250 200 150 100 260 °C max TΔ = 183 °C 10 s max 2 ~ 4 °C/s 2 ~ 3 °C/s ADD: The recommended reflow conditions as above graph, are set according to our soldering equipment. Due to various manufactures may have different reflow soldering equipment, products, process conditions, set methods. And so on, when setting the reflow conditions, Please adjust and confirm according to users’ environment/equipment. SOLDERING IRON (REWORK) 1) Use soldering iron to solder inductors by hand, times does not exceed 350 degrees 3 times. 2) When soldering iron welding, please try to avoid contacting the inductor itself. (definitely do not contact the wire) 3) To solder inductors by soldering iron is not recommended). 350±10 °C Soldering iron power: 30 W max 3 seconds max

belfuse.com/signal Toll Free 866-239-5777 | Tel 516-239-5777 | Fax 516-239-7208 sales@signaltransformer.com | techhelp@signaltransformer.com Custom versions available upon request. © 2022 Signal Transformer Specifications subject to change without notice. SFAPI Series Dec 16 2022 SFAPI Series RoHS Compliant IN BAG PACKAGE SPECIFICATIONS Small Box Inside Box Outside Carton 120 180 160 260 190 180 410 270 C/NO. STORAGE CONDITIONS a) Temperature and humidity conditions: <35 and < 35 65%. b) Recommendation: inductors should be used within 6 months from the time or delivery c) Packaging material should be kept away from where chlorine or sulfur exists. PACKAGE QUANTITY Series Bag Pcs / Bag Small Box Inside Box Outside Carton SFAPI 7X5 200 600 2400 4800 TAPE AND REEL SPECIFICATIONS 10.0±0.5 52.0±1.0 Outside Carton 380 C/NO. Ø 355 380 460 LABEL Ø 17.5 STORAGE CONDITIONS a) Temperature and humidity conditions: <35 and < 35 65%. b) Recommendation: inductors should be used within 6 months from the time or delivery c) Packaging material should be kept away from where chlorine or sulfur exists. PACKAGE QUANTITY Series Type Packaging Quantity (pcs) Parts / Box Parts / Reel Parts / Carton SFAPI T5X2 - 1000 5000

belfuse.com/signal For more information, please contact us:

128 Atlantic Avenue

Lynbrook, NY 11563 Toll Free +1 866-239-5777 Tel +1 516-239-5777 Fax +1 516-239-7208 sales@signaltransformer.com techhelp@signaltransformer.com About Signal Transformer Signal Transformer is known as the world's leader of wire wound magnetic solutions since 1959. With over 50 years of experience manufacturing transformers, chokes, inductors and custom or modified standard products. Signal offers not only the most comprehensive line of certified standard power conversion products, with our vast engineering, manufacturing and regulatory resources; Signal Transformer excels in the design and manufacturer of cost effective, specialized platforms. © 2022 Signal Transformer Specifications subject to change without notice. SFAPI Series Dec 16 2022