Through Hole Resistors

1. What are Through Hole Resistors?

Through-hole resistors, the most classic type of resistor, feature leads designed to pass through PCB holes for soldering. They have the following notable features:

Structural Advantages: Axial lead structure provides excellent mechanical stability

Power Capacity: Rated power ranges from 1/8W to 50W (special models up to 300W)

Temperature Coefficient: Available from ±50ppm/°C to ±1000ppm/°C (precision models up to ±5ppm/°C)

Tolerance Precision: Available in multiple ranges from standard ±5% to precise ±0.1%

 

2. What are the Technical Parameters of Through Hole Resistors?

Parameter

Typical Specifications

Test Conditions

Resistance Range

1Ω~100MΩ (E24/E96 Series)

25°C Reference Temperature

Operating Voltage

 

50V~2kV (Correlated with power level)

Continuous load conditions

Temperature Range

-55°C~155°C (Military Grade up to 200°C)

Thermal Resistance Test Environment

Pulse Withstand Capability

8x rated power at 10ms pulse width

Complies with IEC60115-8

 

3. What are the Typical Application Scenarios of Through Hole Resistors?

Industrial Control: Current Sampling in PLC Input/Output Modules.

Power Supply Systems: Current Limiting Protection Circuits for Switching Power Supplies.

Automotive Electronics: Signal Conditioning Networks for ECU Sensors.

Test Equipment: Internal Voltage Divider Networks in Multimeters.

 

4. Selection Guide for Through Hole Resistors

Power Margin Calculation: Actual Power Consumption ≤ Rated Power × Derating Factor (0.7 recommended at 85°C).

High-Frequency Considerations: Thin-Film or Wirewound Types are Recommended for Applications >1MHz.

Environmental Adaptability: Glass-Enamel Coated Types are Preferred for Hot and Humid Environments.

Solderability Verification: Sn63Pb37 or Lead-Free Solder Must Pass J-STD-002 Testing.

 

5. Cutting-Edge Developments of Through Hole Resistors

High-Reliability Design: Utilizes Ceramic Substrates and NiCr Composite Technology.

Miniaturization Trend: 0207 Package (0.5mm Diameter) in Mass Production.

Intelligent Integration: Prototype of Smart Resistor Combined with Temperature Sensor.