Resistors-Through Hole

Part Number	Description / PDF	Quantity
ERG-3SJ333A Panasonic	RES 33K OHM 3W 5% AXIAL	0
ERG-1SJ751 Panasonic	RES 750 OHM 1W 5% AXIAL	7179
ERG-1SJ561A Panasonic	RES 560 OHM 1W 5% AXIAL	10000
ERX-2SJR91A Panasonic	RES 0.91 OHM 2W 5% AXIAL	6000
ERG-1SJ472A Panasonic	RES 4.7K OHM 1W 5% AXIAL	60000
ERG-1SJ471V Panasonic	RES 470 OHM 1W 5% AXIAL	5146
ERG-1SJ363 Panasonic	RES 36K OHM 1W 5% AXIAL	6209
ERG-2SJ751 Panasonic	RES 750 OHM 2W 5% AXIAL	4900
ERG-3SJ121 Panasonic	RES 120 OHM 3W 5% AXIAL	223
ERG-1SJ241A Panasonic	RES 240 OHM 1W 5% AXIAL	0
ERD-S2TJ1R3V Panasonic	RES 1.3 OHM 1/4W 5% AXIAL	12460
ERG-2SJ910A Panasonic	RES 91 OHM 2W 5% AXIAL	6000
ERG-2SJ300A Panasonic	RES 30 OHM 2W 5% AXIAL	0
ERG-2SJ822 Panasonic	RES 8.2K OHM 2W 5% AXIAL	4104
ERD-S2TJ624V Panasonic	RES 620K OHM 1/4W 5% AXIAL	34994
ERG-2SJ202V Panasonic	RES 2K OHM 2W 5% AXIAL	3702
ERX-2SJ9R1A Panasonic	RES 9.1 OHM 2W 5% AXIAL	6000
ERG-3SJ681A Panasonic	RES 680 OHM 3W 5% AXIAL	6000
ERG-3SJ680A Panasonic	RES 68 OHM 3W 5% AXIAL	1500
ERG-3SJ123 Panasonic	RES 12K OHM 3W 5% AXIAL	2028

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

Type	Functional Characteristics	Application Examples
Carbon Film Resistors	Low noise, stable performance, cost-effective	General-purpose electronics, consumer devices
Metal Film Resistors	High precision ( 0.1% tolerance), low temperature coefficient	Medical instruments, test equipment
Wirewound Resistors	High power handling (up to 50W), accurate resistance values	Power supplies, industrial machinery
Ceramic Composition Resistors	High surge current resistance	Power line filters, lighting ballasts
Fusible Resistors	Acts as both resistor and fuse	Overcurrent 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

Parameter	Typical Range	Importance
Resistance Value	1 to 100M	Determines current/voltage control
Power Rating	1/8W to 50W	Defines maximum power dissipation
Tolerance	0.01% to 5%	Indicates resistance accuracy
Temperature Coefficient	5ppm/ C to 300ppm/ C	Measures stability over temperature
Voltage Rating	200V to 1000V	Prevents 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

Manufacturer	Key Products
Vishay Precision Group	Y1485 series ( 0.005% tolerance wirewound)
Yageo Corporation	MF-RC series (metal film, 1/4W to 2W)
Panasonic Electronic Components	EVR series (ceramic composition, 250V rating)
Bourns Inc.	CR2800 series (fusible resistors)

7. Selection Guidelines

Key considerations:

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