Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
RW3R0DB24R0J Ohmite	RES SMD 24 OHM 5% 3W J LEAD	7
TDH50H200RFE Ohmite	TO-263 HEATSINKABLE THICK FILM R	0
ACPP0603 82R B Ohmite	RES SMD 82 OHM 0.1% 1/16W 0603	0
KDV04FR100ET Ohmite	RESISTOR CURRENT SENSE	9961
RW1S0BAR050JE Ohmite	RES 0.05 OHM 5% 1W J LEAD	0
MC102821005JE Ohmite	RES SMD 10M OHM 5% 1.5W 5025	497
RC0S2CA30R0JET Ohmite	RES SMD 30 OHM 5% 1/4W J LEAD	0
TDH35P100RJE Ohmite	RES SMD 100 OHM 5% 35W D2PAK	178
AP725 1R F Ohmite	RES SMD 1 OHM 1% 20W TO263-3	850
LVK20R020DER Ohmite	RES 0.02 OHM 0.5% 3/4W 2010	4365
RW3R0DB5R00JE Ohmite	RES SMD 5 OHM 5% 3W J LEAD	0
MCS3264R005FER Ohmite	RES 0.005 OHM 1% 2W 3264	362
HVC2512Z1007JET Ohmite	RES SMD 1G OHM 5% 1W 2512	0
ACPP0805 2K B Ohmite	RES SMD 2K OHM 0.1% 1/10W 0805	0
LVK24R033FER Ohmite	RES 0.033 OHM 1% 1W 2412	0
RW3R5EAR020JET Ohmite	RES 0.02 OHM 5% 3.5W J LEAD	0
RW1S0BAR047FET Ohmite	RES 0.047 OHM 1% 1W J LEAD	0
RC0R5DB56R0JET Ohmite	RES SMD 56 OHM 5% 1/2W J LEAD	0
FCSL90R050FER Ohmite	RES 0.05 OHM 4W 3518 WIDE	0
FCSL110R025FER Ohmite	RES 0.025 OHM 5W 4320 WIDE	1099

Chip Resistors-Surface Mount

1. Overview

Surface Mount Chip Resistors (SMD Resistors) are passive electronic components designed to limit current flow and divide voltages in printed circuit boards (PCBs). As key elements in Surface Mount Technology (SMT), they enable high-density PCB layouts and automated manufacturing. Their miniaturized footprint and reliability make them essential for modern electronics, including smartphones, automotive systems, and industrial equipment.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Thick Film Resistors	Cost-effective, standard tolerance ( 1%-5%), power ratings up to 1W	Consumer electronics, power supplies
Thin Film Resistors	High precision ( 0.01%), low noise, stable temperature coefficients	Medical devices, precision instrumentation
Power Resistors	High power dissipation (up to 3W), robust thermal management	Motor drives, EV battery management systems
Network Resistors	Multiple resistors in single package, matched temperature coefficients	Digital circuits, memory modules
Wirewound Resistors	High inductance, precise low-resistance values	Audio amplifiers, industrial control systems

3. Structure and Composition

Typical SMD resistors consist of: - Ceramic substrate (Alumina, 96% Al₂O₃) - Resistive layer (Ruthenium oxide for thick film, Nichrome for thin film) - Termination electrodes (Ni/Sn or Ag/Pd metallization) - Protective coating (Epoxy or glass encapsulation) Standard packages follow EIA dimensions (e.g., 0402, 0603, 0805).

4. Key Technical Specifications

Parameter	Description	Importance
Resistance Range	1 to 10M (film), 0.1 to 100k (power)	Determines current control capability
Tolerance	0.01% (precision) to 5% (general)	Impacts circuit accuracy
Power Rating	0.05W to 3W @ 70 C	Defines thermal dissipation limits
TCR	5ppm/ C (thin film) to 200ppm/ C	Affects stability over temperature
Operating Temp	-55 C to +155 C	Defines environmental reliability
Voltage Coefficient	<0.1ppm/V	Ensures voltage stability

5. Application Fields

Consumer Electronics: Smartphones, wearables, IoT devices
Automotive: ADAS sensors, battery management systems, ECUs
Industrial: PLCs, motor drives, power converters
Telecom: 5G base stations, optical transceivers
Medical: Diagnostic equipment, implantable devices

6. Leading Manufacturers and Products

Manufacturer	Representative Series	Key Features
Yageo	CRCW Series	0.05W-1W, 0.1% tolerance
Vishay	CRCWE Series	Thin film, TCR 25ppm/ C
ROHM	MCR Series	Power resistors up to 2W
Ohmite	PWR Series	High-power 3W devices
Bourns	CRCU Series	Network resistors with 8-element arrays

7. Selection Recommendations

Consider: - Required resistance tolerance and power rating - Operating temperature range (automotive needs -40 C to +125 C) - Package size constraints (e.g., 0402 for mobile devices) - Long-term stability requirements (medical applications prefer thin film) - Cost vs. performance trade-offs (consumer vs. industrial use) Example: For smartphone power management, select 0603 thick film resistors with 1% tolerance and 125 C rating.

8. Industry Trends

Key trends include: - Miniaturization: Development of 0201 and 01005 packages - Higher precision: Sub-0.01% tolerance thin film resistors - Enhanced thermal management: New materials for power densities >1W/mm - Automotive growth: AEC-Q200 qualified parts for EVs - Smart manufacturing: AI-driven resistor selection tools - Sustainability: Lead-free and halogen-free material adoption