Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
RW2R0DAR030JET Ohmite	RES 0.03 OHM 5% 2W J LEAD	0
RW1S0BAR100FT Ohmite	RES 0.1 OHM 1% 1W J LEAD	0
RW1S0BAR020JET Ohmite	RES 0.02 OHM 5% 1W J LEAD	0
KDV04FR050ET Ohmite	RESISTOR CURRENT SENSE	9871
KDV04DR390ET Ohmite	RESISTOR CURRENT SENSE	10000
FCSL64R010FER Ohmite	RES 0.01 OHM 2W 2512 WIDE	1345
LVT06R0020HER Ohmite	RES 0.002 OHM 3% 1/3W 0603	3645
RW1S0BAR100JET Ohmite	RES 0.1 OHM 5% 1W J LEAD	0
TDH35P7R50JE Ohmite	RES SMD 7.5 OHM 5% 35W D2PAK	862
TDH35P5R00JE Ohmite	RES SMD 5 OHM 5% 35W D2PAK	1898
KDV04DR820ET Ohmite	RESISTOR CURRENT SENSE	10000
RW1S0BAR100FE Ohmite	RES 0.1 OHM 1% 1W J LEAD	100
FC4L110R005FER Ohmite	RES 0.005 OHM 5W 4320 WIDE	0
RW2S0CB1R00JE Ohmite	RES SMD 1 OHM 5% 2W J LEAD	93
ACPP0603 680R B Ohmite	RES SMD 680 OHM 0.1% 1/16W 0603	0
RW2S0DA10R0JE Ohmite	RES SMD 10 OHM 5% 2W J LEAD	97
FC4TR050FER Ohmite	RES 0.05 OHM 1% 1/2W 1206	5906
KDV02DR200ET Ohmite	RESISTOR CURRENT SENSE	10000
TDH50HR200FE Ohmite	TO-263 HEATSINKABLE THICK FILM R	0
HVC1206T1005JET Ohmite	RES SMD 10M OHM 5% 1/4W 1206	319

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