Resistors-Through Hole

Part Number	Description / PDF	Quantity
UB3C-47RF1 Riedon	RES 47 OHM 3W 1% AXIAL	0
RLR07C1002GMRE5 Vishay / Dale	ERL-07 10K 2% T-1 RLR07C1002GM R	0
RNF14BTC250R Stackpole Electronics, Inc.	RES 250 OHM 1/4W .1% AXIAL	0
12FR025E Ohmite	RES 25M OHM 1% 2W AXIAL	2109
CMF55330K00FERE Vishay / Dale	RES 330K OHM 1/2W 1% AXIAL	0
CP002251R00JB14 Vishay / Dale	RES 51 OHM 22W 5% AXIAL	0
MBA02040C5498FCT00 Vishay BC Components/Beyshlag/Draloric	RES 5.49 OHM 0.4W 1% AXIAL	0
RNC50H3163FSBSL Vishay / Dale	RES 316K OHM 1/10W 1% AXIAL	0
RLR07C1210FSRSL Vishay / Dale	RES 121 OHM 1% 1/4W AXIAL	0
RWR80N8060FPB12 Vishay / Dale	RES 806 OHM 2W 1% WW AXIAL	0
RWR78N2261FRB12 Vishay / Dale	RES 2.26K OHM 10W 1% WW AXIAL	0
MOX-1-121005FE Ohmite	RES 10M OHM 1% 2.5W AXIAL	2131
RWR84S1R50FSRSL Vishay / Dale	RES 1.5 OHM 7W 1% WW AXIAL	0
RLR20C47R5FSR36 Vishay / Dale	ERL-20 47.5 1% T-1 RLR20C47R5FS	0
RWR84S2R49FRB12 Vishay / Dale	RES 2.49 OHM 7W 1% WW AXIAL	0
PTF651M0000DZBF Vishay / Dale	RES 1M OHM 1/4W 0.5% AXIAL	0
17FPR040E Ohmite	RES 0.04 OHM 7W 1% AXIAL	99
RN55E1370BB14 Vishay / Dale	RES 137 OHM 1/8W .1% AXIAL	0
CMF5592K800FKBF Vishay / Dale	RES 92.8K OHM 1/2W 1% AXIAL	0
RNC50K46R4FSB14 Vishay / Dale	RES 46.4 OHM 1/10W 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

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.