Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERJ-14YJ2R0U Panasonic	RES SMD 2 OHM 5% 1/2W 1210	3760
ERJ-U03J390V Panasonic	RES 39 OHM 5% 1/10W 0603 SMD	5000
ERA-3VPB5492V Panasonic	RES 54.9K OHM 0.1% 1/8W 0603	0
ERJ-U08F1472V Panasonic	RES 14.7K OHM 1% 1/8W 1206 SMD	0
ERA-3VRW6202V Panasonic	RES 62K OHM 0.05% 1/8W 0603	0
ERJ-UP3F2743V Panasonic	RES 274K OHM 1% 1.4W 0603	0
ERJ-S12J125U Panasonic	RES 1.2 M OHM 5% 3/4W 1812 SMD	0
ERA-3VEB5901V Panasonic	RES 5.9K OHM 0.1% 1/8W 0603	0
ERJ-P6WF78R7V Panasonic	RES SMD 78.7 OHM 1% 1/2W 0805	0
ERJ-UP3D3481V Panasonic	RES 3.48K OHM 0.5% 1.4W 0603	0
ERA-3AED221V Panasonic	RES SMD 220 OHM 0.5% 1/10W 0603	34970
ERJ-S1TF1053U Panasonic	RES SMD 105K OHM 1% 1W 2512	0
ERA-3AEB1131V Panasonic	RES SMD 1.13KOHM 0.1% 1/10W 0603	11128
ERJ-H2RF3091X Panasonic	RES 3.09K OHM 1% 1/10W 0402	0
ERJ-U03D7681V Panasonic	0603 ANTI-SULFUR RES. , 0.5%, 7.	0
ERA-8AEB4872V Panasonic	RES SMD 48.7K OHM 0.1% 1/4W 1206	5683
ERJ-S14F2050U Panasonic	RES SMD 205 OHM 1% 1/2W 1210	0
ERJ-P14D1471U Panasonic	RES SMD 1.47 KOHM 0.5% 1/2W 1210	0
ERA-3AEB1543V Panasonic	RES SMD 154K OHM 0.1% 1/10W 0603	24189
ERJ-HP6F7321V Panasonic	RES 7.32K 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