Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERJ-PA3F7870V Panasonic	RES SMD 787 OHM 1% 1/4W 0603	0
ERJ-6ENF63R4V Panasonic	RES SMD 63.4 OHM 1% 1/8W 0805	3557
ERJ-P08F63R4V Panasonic	RES SMD 63.4 OHM 1% 2/3W 1206	0
ERJ-A1CJR18U Panasonic	RES 0.18 OHM 1.33W 2512 WIDE	0
ERJ-U03F20R5V Panasonic	RES 20.5 OHM 1% 1/10W 0603 SMD	0
ERJ-U06J363V Panasonic	RES 36K OHM 5% 1/8W 0805 SMD	0
ERJ-3EKF30R1V Panasonic	RES SMD 30.1 OHM 1% 1/10W 0603	32036
ERJ-U14F5R76U Panasonic	RES 5.76 OHM 1% 1/2W 1210 SMD	0
ERJ-1GNF3653C Panasonic	RES SMD 365K OHM 1% 1/20W 0201	49690
ERJ-S02F20R5X Panasonic	RES SMD 20.5 OHM 1% 1/10W 0402	0
ERJ-HP6F1871V Panasonic	RES 1.87K OHM 1% 1/2W 0805	0
ERJ-6ENF6811V Panasonic	RES SMD 6.81K OHM 1% 1/8W 0805	29061
ERA-6VEB3740V Panasonic	RES 374 OHM 0.1% 1/4W 0805	0
ERA-8ARB2431V Panasonic	RES SMD 2.43K OHM 0.1% 1/4W 1206	792
ERJ-P14F8871U Panasonic	RES SMD 8.87K OHM 1% 1/2W 1210	6798
ERJ-HP6F18R0V Panasonic	RES 18 OHM 1% 1/2W 0805	0
ERJ-S08F12R7V Panasonic	RES SMD 12.7 OHM 1% 1/4W 1206	0
ERJ-H3EF1131V Panasonic	RES 1.13K OHM 1% 1/6W 0603	0
ERJ-H3EF68R0V Panasonic	RES 68 OHM 1% 1/6W 0603	0
ERA-3VEB1742V Panasonic	RES 17.4K OHM 0.1% 1/8W 0603	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