Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
RW2S0CBR030J Ohmite	RES 0.03 OHM 5% 2W J LEAD	0
FCSL150R001JER Ohmite	RES 0.001 OHM 10W 2959 WIDE	472
RW2R0DAR050FET Ohmite	RES 0.05 OHM 1% 2W J LEAD	0
RW1S0BAR750JE Ohmite	RES 0.75 OHM 5% 1W J LEAD	453
TDH35P20R0JE Ohmite	RES SMD 20 OHM 5% 35W D2PAK	2176
RC1R0EA15R0KE Ohmite	RES SMD 15 OHM 10% 1W J LEAD	0
KDV08FR620ET Ohmite	RES 620M OHM 1% 1/4W 0805	4766
FCSL64R025DER Ohmite	RES 0.025 OHM 0.5% 2W 2512	0
KDV04DR180ET Ohmite	RESISTOR CURRENT SENSE	10000
MC102821005J Ohmite	RES SMD 10M OHM 5% 1.5W 5025	0
RC1R0EA33R0KET Ohmite	RES SMD 33 OHM 10% 1W J LEAD	0
RW1S0CKR005DET Ohmite	RES 0.005 OHM 0.5% 1W 4324	0
RW3R0DB1R00JE Ohmite	RES SMD 1 OHM 5% 3W J LEAD	535
RW2R0DAR010J Ohmite	RES 0.01 OHM 5% 2W J LEAD	0
RW2R0DA1R00JT Ohmite	RES SMD 1 OHM 5% 2W J LEAD	0
KDV06FR560ET Ohmite	RES 560M OHM 1% 1/5W 0603	4867
LVK12R010FER Ohmite	RES 0.01 OHM 1% 1/2W 1206	78291
RC0S2CA20R0JET Ohmite	RES SMD 20 OHM 5% 1/4W J LEAD	0
RC0R5DB150RJET Ohmite	RES SMD 150 OHM 5% 1/2W J LEAD	0
RW1S0BAR200JE Ohmite	RES 0.2 OHM 5% 1W J LEAD	110

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