Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERJ-U03D1801V Panasonic	0603 ANTI-SULFUR RES. , 0.5%, 1.	0
ERJ-U08F6801V Panasonic	RES 6.8K OHM 1% 1/8W 1206 SMD	0
ERJ-PB3B2700V Panasonic	RES SMD 270 OHM 0.1% 1/5W 0603	9285
ERJ-P03D1871V Panasonic	RES SMD 1.87 KOHM 0.5% 1/5W 0603	0
ERJ-XGNF1211Y Panasonic	RES 1.21K OHM 1% 1/32W 01005	0
ERJ-U01J160C Panasonic	RES 16 OHM 5% 1/20W 0201 SMD	15000
ERJ-P14F2490U Panasonic	RES SMD 249 OHM 1% 1/2W 1210	0
ERJ-P03D59R0V Panasonic	RES SMD 59 OHM 0.5% 1/5W 0603	0
ERJ-P08D41R2V Panasonic	RES SMD 41.2 OHM 0.5% 2/3W 1206	0
ERJ-P08F2400V Panasonic	RES SMD 240 OHM 1% 2/3W 1206	0
ERJ-P06D6492V Panasonic	RES SMD 64.9 KOHM 0.5% 1/2W 0805	0
ERJ-UP3D3322V Panasonic	RES 33.2K OHM 0.5% 1.4W 0603	0
ERJ-P08D8451V Panasonic	RES SMD 8.45 KOHM 0.5% 2/3W 1206	0
ERJ-6GEYJ621V Panasonic	RES SMD 620 OHM 5% 1/8W 0805	60562
ERJ-S1DF3R57U Panasonic	RES 3.57 OHM 1% 3/4W 2010 SMD	0
ERJ-P14F1051U Panasonic	RES SMD 1.05 KOHM 1% 1/2W 1210	0
ERJ-6ENF8660V Panasonic	RES SMD 866 OHM 1% 1/8W 0805	20318
ERJ-U6RD1541V Panasonic	RES 1.54K OHM 0.5% 1/8W 0805 SMD	0
ERA-6VEB6981V Panasonic	RES 6.98K OHM 0.1% 1/4W 0805	0
ERJ-S06F5903V Panasonic	RES SMD 590K OHM 1% 1/8W 0805	0

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