Arrays, Signal Transformers

Image Part Number Description / PDF Quantity Rfq
7448990150

7448990150

Würth Elektronik Midcom

INDUCT ARRAY 2 COIL 15UH SMD

159

PF0552.472NLT

PF0552.472NLT

PulseLarsen Antenna

INDUCT ARRAY 2 COIL 5.3UH SMD

0

DRQ125-471-R

DRQ125-471-R

PowerStor (Eaton)

INDUCT ARRAY 2 COIL 473.1UH SMD

600

SRF1260A-1R0Y

SRF1260A-1R0Y

J.W. Miller / Bourns

INDUCT ARRAY 2 COIL 1UH SMD

0

SDQ25-3R3-R

SDQ25-3R3-R

PowerStor (Eaton)

INDUCT ARRAY 2 COIL 2.89UH SMD

0

DRQ125-820-R

DRQ125-820-R

PowerStor (Eaton)

INDUCT ARRAY 2 COIL 86.89UH SMD

0

PF0552.472NL

PF0552.472NL

PulseLarsen Antenna

INDUCT ARRAY 2 COIL 5.3UH SMD

0

SRF1260-221M

SRF1260-221M

J.W. Miller / Bourns

INDUCT ARRAY 2 COIL 220UH SMD

1105

DRQ74-6R8-R

DRQ74-6R8-R

PowerStor (Eaton)

INDUCT ARRAY 2 COIL 7.344UH SMD

0

DRQ74-R33-R

DRQ74-R33-R

PowerStor (Eaton)

INDUCT ARRAY 2 COIL 294NH SMD

0

DRQ73-6R8-R

DRQ73-6R8-R

PowerStor (Eaton)

INDUCT ARRAY 2 COIL 6.48UH SMD

1181

PA2494HL

PA2494HL

PulseLarsen Antenna

INDUCT ARRAY 4 COIL SMD

0

CTX10-3P-R

CTX10-3P-R

PowerStor (Eaton)

INDUCT ARRAY 2 COIL 9.79UH SMD

800

744851016

744851016

Würth Elektronik Midcom

INDUCT ARRAY 2 COIL 160NH SMD

0

SRF1280-681M

SRF1280-681M

J.W. Miller / Bourns

INDUCT ARRAY 2 COIL 680UH SMD

0

P0177NLT

P0177NLT

PulseLarsen Antenna

INDUCT ARRAY 2 COIL 10.4UH SMD

1693

P0400NL

P0400NL

PulseLarsen Antenna

INDUCT ARRAY 2 COIL 18.5UH SMD

0

SDQ12-330-R

SDQ12-330-R

PowerStor (Eaton)

INDUCT ARRAY 2 COIL 32.49UH SMD

0

IHCL4040DZER100M5A

IHCL4040DZER100M5A

Vishay / Dale

INDUCT ARRAY 2 COIL 10UH SMD

643

DRQ127-4R7-R

DRQ127-4R7-R

PowerStor (Eaton)

INDUCT ARRAY 2 COIL 4.841UH SMD

610

Arrays, Signal Transformers

1. Overview

Inductors, coils, chokes, arrays, and signal transformers are fundamental passive components in electronic systems. Inductors store energy in magnetic fields, chokes suppress high-frequency noise, arrays integrate multiple magnetic elements, and signal transformers enable voltage conversion and galvanic isolation. These components are critical in power management, signal processing, electromagnetic interference (EMI) mitigation, and communication systems. Their advancements drive miniaturization, efficiency, and performance in modern electronics.

2. Main Types and Functional Classification

TypeFunctional CharacteristicsApplication Examples
Wire-wound InductorsHigh inductance values, low DC resistanceSwitching power supplies
Ferrite Bead ChokesHigh impedance at high frequenciesEMI filtering in USB interfaces
Common-mode Choke ArraysSuppress differential and common-mode noiseIndustrial motor drives
Signal TransformersGalvanic isolation, voltage scalingTelecom network interfaces
Thin-film Inductor ArraysUltra-low profile, tight couplingRF front-end modules

3. Structure and Composition

Typical structures include:

  • Inductors: Wound conductive wire (copper/enamelled aluminum) on magnetic cores (ferrite, powdered iron)
  • Chokes: Toroidal or drum cores with single/dual windings
  • Arrays: Monolithic integration of multiple chokes/inductors in single package
  • Signal Transformers: Primary/secondary coils with electrostatic shielding, E-I or toroidal cores

4. Key Technical Specifications

ParameterDescriptionImportance
Inductance (L)Defines energy storage capacity ( H-mH range)Determines filtering performance
Rated CurrentMax DC/AC current before saturationPrevents core saturation in power circuits
DCRDC resistance of windingsAffects power efficiency
Self-resonant FrequencyFrequency where parasitic capacitance dominatesLimits usable frequency range
Turns RatioPrimary/secondary winding ratioDefines voltage transformation ratio

5. Application Fields

Key industries:

  • Telecommunications: Base station power systems, optical transceivers
  • Consumer Electronics: Mobile chargers, LED drivers
  • Automotive: EV battery management systems, ADAS sensors
  • Industrial: Programmable logic controllers (PLCs), inverters

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductsKey Features
TDKINDUCTOR,Wire-wound: VLS6045EX6.0 4.5 4.5mm, 120A rated current
CoilcraftCommon-mode Choke: 1140081.8kV isolation, 100MHz bandwidth
BournsSignal Transformer: SM41121:1:1:1 ratio, 1500V isolation
Pulse ElectronicsLAN Transformer: HX4008NLIntegrated magnetics for Gigabit Ethernet
SumidaPower Choke: CDRH3D283.3 H-100 H, 125A peak current

7. Selection Guidelines

Consider:

  • Inductance value and tolerance ( 20% typical for power chokes)
  • Operating frequency vs. self-resonant frequency
  • Thermal management (temperature rise 40 C)
  • Package size (0402-2200 for surface-mount devices)
  • Isolation voltage ( 1.5kV for industrial applications)

8. Industry Trends

Emerging trends:

  • Miniaturization: 01005-sized inductors for wearable devices
  • High-frequency operation: Multi-GHz transformers for 5G infrastructure
  • Integrated magnetics: Combined inductors/transformers in SiP solutions
  • Advanced materials: Amorphous/nanocrystalline cores for high-efficiency EV chargers
  • Automotive-grade reliability: AEC-Q200 qualified components for e-mobility

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