LDRS

LDRS

LDRS

Product catalog summary
Overview: The document outlines the technical specifications for the LDRS Series SMD Shielded Power Inductors by Stackpole Electronics, Inc. These inductors are designed for applications that require compact, low-profile components with low DC resistance (DCR) and high current capabilities. They feature magnetic shielding to prevent radiation and are suitable for surface mounting.
Features:
  • Compact and low-profile design.
  • Low DCR and high current capacity.
  • Magnetic shielding against radiation.
  • Flat bottom for reliable surface mounting.
  • Custom inductance values available upon request.
Applications:
  • GPS and PDAs.
  • Personal computers.
  • DC/DC converters.
Mechanical Specifications: The document details the mechanical specifications for various models within the LDRS series, including dimensions and inductance ranges. For example, the LDRS2424 model has an inductance range of 4.7 to 100 μH and a current range of 1.6 to 0.42 A.
Electrical Specifications: Detailed electrical specifications are provided for different models, including inductance, DCR, and current ratings at 25ºC. For instance, the LDRS2424MT4R7 has an inductance of 4.7 μH, a maximum DCR of 0.036 Ω, and a saturation current (Isat) of 1.6 A.
Environmental Specifications: The document outlines the environmental conditions for storage and testing, including temperature and humidity ranges. It specifies that products should be used within six months of delivery and details various environmental tests such as high and low-temperature storage tests, humidity tests, and thermal shock tests.
Packaging Specifications: Packaging dimensions and specifications for different models are included to ensure proper handling and storage.
Ordering Information: A guide on how to order these inductors is provided, including part number breakdowns and packaging options.
Mechanical Tests: Mechanical tests such as vibration and shock resistance tests are described to ensure product durability and reliability.
Shock Testing: The rubber block method is used for shock testing the machine in three orientations. The product must show no case deformation or change in appearance, with a deformation limit of Δ L/L ≤10%.
Solderability Test: Terminal areas must achieve a minimum of 90% solder coverage. Products with lead-free terminals are tested by dipping pads in flux and then in a solder pot (SnCuNi) at 245±5°C for 3 seconds.
Resistance to Soldering Heat: The product should not show any case deformation or change in appearance. The sample is covered in flux, preheated for about 2 minutes at 130~150°C, and then immersed at 260±5°C for 10 seconds.
Product Specifications: Various product codes, dimensions, and specifications are listed, including inductance values and profiles (Standard, Low Profile, Mid Profile, High Profile). Packaging options include 13" Tape and Reel, with tolerances ranging from 20% to 30%.
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Catalog excerpts

LDRS-1

LDRS Series SMD Shielded Power Inductor Features: Resistive Product Solutions Compact, low profile with low DCR and high current Provides magnetic shielding against radiation Flat bottom provides reliable surface mounting Contact Stackpole for additional inductance values GPS and PDAs Personal computers DC/DC converters Inductance and Current Ranges Type inches mm inches mm inches mm inches mm inches mm Rev Date: 08/01/2016 This specification may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.

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LDRS-2

LDRS Series SMD Shielded Power Inductor Resistive Product Solutions Test Condition Test Condition Test Condition Rev Date: 08/01/2016 This specification may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. Test Condition www.seielect.com marketing@s

 Open the catalog to page 2
LDRS-3

LDRS Series SMD Shielded Power Inductor Resistive Product Solutions Test Condition Rev Date: 08/01/2016 This specification may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. Test Condition www.seielect.com marketing@seielec

 Open the catalog to page 3
LDRS-4

LDRS Series SMD Shielded Power Inductor Resistive Product Solutions Test Condition Electrical Specifications – LDRS4949 Tolerance Test Condition Electrical Specifications – LDRS4949(HP) Tolerance Test Condition Rev Date: 08/01/2016 This specification may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. www.seielect.com marketing@sei

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LDRS-5

LDRS Series SMD Shielded Power Inductor Resistive Product Solutions Packaging Specifications Type / Code Inches mm Inches mm Inches mm Inches mm Inches mm Inches mm Inches mm Inches mm Environmental Specifications - General Items Shelf Storage Conditions Temperature range: 25±3°C. Humidity: <80% relative humidity. Recommended product should be used within six months from the time of delivery. Environmental Test Items Test Conditions / Test Methods No case deformation or change in appearance. Δ L/L ≤10% Temperature 85±2°C Time: 48 ± 2 hours Tested after 1 hour at room temperature Temperature -40±2°C...

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LDRS-6

LDRS Series SMD Shielded Power Inductor Resistive Product Solutions Mechanical Test Items Solderability Test Terminal area must have 90% minimum solder coverage Resistance to Soldering Heat No case deformation or change in appearance Vibration Test Test Conditions / Test Methods Product with lead-free terminal Dip pads in flux then dip in solder pot (SnCuNi) at 245±5°C for 3 seconds Flux should cover the whole of the sample before heating, then be preheated for about 2 minutes over temperature of 130~150°C. immersing to 260±5°C for 10 seconds Apply frequency 10~55Hz 1.5mm amplitude in each of...

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