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Resistors-Through Hole

Image Part Number Description / PDF Quantity Rfq
CF1/4CT52R473J

CF1/4CT52R473J

KOA Speer Electronics, Inc.

RES 47K OHM 5% 1/4W AXIAL

33625
CFS1/2CT52R121J

CFS1/2CT52R121J

KOA Speer Electronics, Inc.

RES 120 OHM 5% 1/2W AXIAL

0
CFS1/2CT52R392J

CFS1/2CT52R392J

KOA Speer Electronics, Inc.

RES 3.9K OHM 5% 1/2W AXIAL

0
CF1/2CT52R510J

CF1/2CT52R510J

KOA Speer Electronics, Inc.

RES 51 OHM 5% 1/2W AXIAL

6995
CF1/4CT52R680J

CF1/4CT52R680J

KOA Speer Electronics, Inc.

RES 68 OHM 5% 1/4W AXIAL

9644
CF1/4C104J

CF1/4C104J

KOA Speer Electronics, Inc.

RES 100K OHM 5% 1/4W AXIAL

0
CF1/4CT52R301J

CF1/4CT52R301J

KOA Speer Electronics, Inc.

RES 300 OHM 5% 1/4W AXIAL

3829
CF1/4CT52R271J

CF1/4CT52R271J

KOA Speer Electronics, Inc.

RES 270 OHM 5% 1/4W AXIAL

8724
CFS1/4CT52R101J

CFS1/4CT52R101J

KOA Speer Electronics, Inc.

RES 100 OHM 5% 1/4W AXIAL

6661
CF1/2CT52R104J

CF1/2CT52R104J

KOA Speer Electronics, Inc.

RES 100K OHM 5% 1/2W AXIAL

7797
CF1/2CT52R4R7J

CF1/2CT52R4R7J

KOA Speer Electronics, Inc.

RES 4.7 OHM 5% 1/2W AXIAL

7938
CFS1/2CT52R221J

CFS1/2CT52R221J

KOA Speer Electronics, Inc.

RES 220 OHM 5% 1/2W AXIAL

0
CF1/4CT52R201J

CF1/4CT52R201J

KOA Speer Electronics, Inc.

RES 200 OHM 5% 1/4W AXIAL

16009
CF1/4CT52R200J

CF1/4CT52R200J

KOA Speer Electronics, Inc.

RES 20 OHM 5% 1/4W AXIAL

24121
CF1/2CT52R301J

CF1/2CT52R301J

KOA Speer Electronics, Inc.

RES 300 OHM 5% 1/2W AXIAL

3995
CF1/4CT52R331J

CF1/4CT52R331J

KOA Speer Electronics, Inc.

RES 330 OHM 5% 1/4W AXIAL

5787
CF1/2CT52R471J

CF1/2CT52R471J

KOA Speer Electronics, Inc.

RES 470 OHM 5% 1/2W AXIAL

2860
CF1/4CT52R155J

CF1/4CT52R155J

KOA Speer Electronics, Inc.

RES 1.5M OHM 5% 1/4W AXIAL

9924
CFS1/2CT52R681J

CFS1/2CT52R681J

KOA Speer Electronics, Inc.

RES 680 OHM 5% 1/2W AXIAL

0
CF1/4C512J

CF1/4C512J

KOA Speer Electronics, Inc.

RES 5.1K OHM 5% 1/4W AXIAL

843

Resistors-Through Hole

1. Overview

Through Hole Resistors (THRs) are axial-leaded electronic components designed to limit current flow and divide voltages in circuits. They are mounted by inserting leads into printed circuit board (PCB) holes and soldering on the reverse side. As foundational passive components, THRs maintain circuit stability and precision across industries. Despite the rise of surface-mount devices, THRs remain critical for high-power applications and prototyping due to their durability and ease of manual handling.

2. Main Types and Functional Classification

TypeFunctional CharacteristicsApplication Examples
Carbon Film ResistorsLow noise, stable performance, cost-effectiveGeneral-purpose electronics, consumer devices
Metal Film ResistorsHigh precision ( 0.1% tolerance), low temperature coefficientMedical instruments, test equipment
Wirewound ResistorsHigh power handling (up to 50W), accurate resistance valuesPower supplies, industrial machinery
Ceramic Composition ResistorsHigh surge current resistancePower line filters, lighting ballasts
Fusible ResistorsActs as both resistor and fuseOvercurrent protection in power circuits

3. Structure and Composition

Typical THRs feature:

  • Lead Wires: Tin-plated copper or silver alloys for solderability
  • Resistive Element: Carbon/metal film or wound nichrome wire
  • Insulating Body: Ceramic or glass-epoxy coating
  • Marking: Color bands (EIA-438B standard) or printed text

Advanced designs incorporate flame-retardant coatings and precision laser-trimmed elements for 0.01% tolerance.

4. Key Technical Specifications

ParameterTypical RangeImportance
Resistance Value1 to 100M Determines current/voltage control
Power Rating1/8W to 50WDefines maximum power dissipation
Tolerance 0.01% to 5%Indicates resistance accuracy
Temperature Coefficient 5ppm/ C to 300ppm/ CMeasures stability over temperature
Voltage Rating200V to 1000VPrevents dielectric breakdown

5. Application Fields

  • Consumer Electronics: Power management in TVs, audio equipment
  • Industrial Control: Motor speed controllers, PLC systems
  • Telecommunications: Signal conditioning in base stations
  • Automotive: Engine control units, LED lighting systems
  • Medical Devices: Precision measurement in diagnostic equipment

Case Study: Metal film resistors in ECG machines provide 0.1% tolerance for accurate heart signal detection.

6. Leading Manufacturers and Products

ManufacturerKey Products
Vishay Precision GroupY1485 series ( 0.005% tolerance wirewound)
Yageo CorporationMF-RC series (metal film, 1/4W to 2W)
Panasonic Electronic ComponentsEVR series (ceramic composition, 250V rating)
Bourns Inc.CR2800 series (fusible resistors)

7. Selection Guidelines

Key considerations:

  1. Determine required power dissipation (select 2x calculated wattage)
  2. Match tolerance to application needs (e.g., 0.1% for audio amplifiers)
  3. Verify temperature coefficient for operating environment
  4. Consider voltage ratings for high-voltage circuits
  5. Check RoHS compliance for environmental regulations

Example: Selecting a 10 , 10W wirewound resistor for a 24V DC motor driver circuit.

8. Industry Trends

Current development directions:

  • Miniaturization while maintaining power ratings (e.g., 5W resistors in 1210 package)
  • Advancements in laser trimming for sub-ppm level precision
  • Adoption of eco-friendly materials meeting REACH/SVHC standards
  • Integration with smart manufacturing systems for automated placement
  • Development of high-temperature resistant models (up to 300 C operating)

Market growth projections indicate a CAGR of 4.2% through 2030, driven by automotive electronics demand.

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