Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERJ-S02F3650X Panasonic	RES SMD 365 OHM 1% 1/10W 0402	0
ERJ-XGNF2700Y Panasonic	RES 270 OHM 1% 1/32W 01005	18900
ERJ-14BQF5R6U Panasonic	RES SMD 5.6 OHM 1% 1/2W 1210	0
ERJ-6RQJ6R8V Panasonic	RES SMD 6.8 OHM 5% 1/8W 0805	4065
ERJ-3EKF7150V Panasonic	RES SMD 715 OHM 1% 1/10W 0603	0
ERJ-PB3D2800V Panasonic	RES SMD 280 OHM 0.5% 1/5W 0603	18387
ERJ-UP3D1801V Panasonic	RES 1.8K OHM 0.5% 1.4W 0603	0
ERJ-U1TF45R3U Panasonic	RES 45.3 OHM 1% 1W 2512 SMD	0
ERJ-T06J184V Panasonic	RES SMD 180K OHM 5% 1/4W 0805	0
ERJ-S12J121U Panasonic	RES SMD 120 OHM 5% 3/4W 1812	0
ERJ-1TNF6341U Panasonic	RES SMD 6.34K OHM 1% 1W 2512	6575
ERJ-H2RF3901X Panasonic	RES 3.9K OHM 1% 1/10W 0402	0
ERJ-U02F1541X Panasonic	RES 1.54K OHM 1% 1/10W 0402 SMD	0
ERJ-XGNF1600Y Panasonic	RES 160 OHM 1% 1/32W 01005	0
ERJ-U1TF12R4U Panasonic	RES 12.4 OHM 1% 1W 2512 SMD	0
ERJ-U02D8660X Panasonic	0402 ANTI-SULFUR RES. , 0.5%, 86	0
ERJ-2RKF66R5X Panasonic	RES SMD 66.5 OHM 1% 1/10W 0402	3064
ERJ-U02F3R92X Panasonic	RES 3.92 OHM 1% 1/10W 0402 SMD	0
ERJ-2RKD62R0X Panasonic	RES 62 OHM 0.5% 1/16W 0402	0
ERJ-P6WF4222V Panasonic	RES SMD 42.2K OHM 1% 1/2W 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