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Resistors-Through Hole

Image Part Number Description / PDF Quantity Rfq
HVAM75FBC500M

HVAM75FBC500M

Stackpole Electronics, Inc.

RES 500M OHM 1% 7.5W AXIAL

0
PCF14JT390K

PCF14JT390K

Stackpole Electronics, Inc.

RES 390K OHM 1/4W 5% AXIAL

0
RNF18FTD11K3

RNF18FTD11K3

Stackpole Electronics, Inc.

RES 11.3K OHM 1/8W 1% AXIAL

0
RSMF3JB4K70

RSMF3JB4K70

Stackpole Electronics, Inc.

RES 4.7K OHM 3W 5% AXIAL

0
CFM12JA68K0

CFM12JA68K0

Stackpole Electronics, Inc.

RES 68K OHM 1/2W 5% CF MINI

0
RNF14BTC17K4

RNF14BTC17K4

Stackpole Electronics, Inc.

RES 17.4K OHM 1/4W .1% AXIAL

0
RNMF14FTD243R

RNMF14FTD243R

Stackpole Electronics, Inc.

RES 243 OHM 1/4W 1% AXIAL

0
RSMF3JB7K50

RSMF3JB7K50

Stackpole Electronics, Inc.

RES 7.5K OHM 3W 5% AXIAL

0
RSF1FT332R

RSF1FT332R

Stackpole Electronics, Inc.

RES 332 OHM 1W 1% AXIAL

0
RNF14FTC110K

RNF14FTC110K

Stackpole Electronics, Inc.

RES 110K OHM 1/4W 1% AXIAL

0
WW3JB150R

WW3JB150R

Stackpole Electronics, Inc.

RES 150 OHM 3W 5% AXIAL

0
CF18JT3R00

CF18JT3R00

Stackpole Electronics, Inc.

RES 3 OHM 1/8W 5% AXIAL

0
RSMF12FT78R7

RSMF12FT78R7

Stackpole Electronics, Inc.

RES 78.7OHM 1/2W 1% AXIAL

0
RNF14BTC49R9

RNF14BTC49R9

Stackpole Electronics, Inc.

RES 49.9 OHM 1/4W .1% AXIAL

0
RNMF12FTD12R1

RNMF12FTD12R1

Stackpole Electronics, Inc.

RES 12.1 OHM 1/2W 1% AXIAL

0
RNF12FAD34R8

RNF12FAD34R8

Stackpole Electronics, Inc.

RES 34.8 OHM 1/2W 1% AXIAL

0
CF1JT510R

CF1JT510R

Stackpole Electronics, Inc.

RES 510 OHM 1W 5% AXIAL

0
RC14JB3R30

RC14JB3R30

Stackpole Electronics, Inc.

RES 3.3 OHM 1/4W 5% AXIAL

0
RNF14FTD7K50

RNF14FTD7K50

Stackpole Electronics, Inc.

RES 7.5K OHM 1/4W 1% AXIAL

16942
WW12FT1K62

WW12FT1K62

Stackpole Electronics, Inc.

RES 1.62K OHM 0.4W 1% AXIAL

0

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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