Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERJ-2RKF2212X Panasonic	RES SMD 22.1K OHM 1% 1/10W 0402	0
ERJ-S14F4530U Panasonic	RES SMD 453 OHM 1% 1/2W 1210	0
ERJ-U03D2102V Panasonic	0603 ANTI-SULFUR RES. , 0.5%, 21	0
ERA-6YEB303V Panasonic	RES SMD 30K OHM 0.1% 1/8W 0805	1
ERJ-P14D2700U Panasonic	RES SMD 270 OHM 0.5% 1/2W 1210	0
ERA-6AED162V Panasonic	RES 1.6K OHM 0.5% 1/8W 0805	15400
ERJ-XGNF33R0Y Panasonic	RES 33 OHM 1% 1/32W 01005	14600
ERA-3VPB1742V Panasonic	RES 17.4K OHM 0.1% 1/8W 0603	0
ERJ-U3RD8660V Panasonic	RES 866 OHM 0.5% 1/10W 0603 SMD	0
ERJ-S02F8661X Panasonic	RES SMD 8.66K OHM 1% 1/10W 0402	0
ERJ-U0XF5110Y Panasonic	RES 511 OHM 1% 1/32W 01005	0
ERJ-U01F1650C Panasonic	RES 165 OHM 1% 1/20W 0201 SMD	0
ERJ-1GEF9093C Panasonic	RES SMD 909K OHM 1% 1/20W 0201	26033
ERJ-UP3F29R4V Panasonic	RES 29.4 OHM 1% 1.4W 0603	0
ERJ-12SF3831U Panasonic	RES SMD 3.83K OHM 1% 3/4W 2010	4003
ERJ-PB6B1152V Panasonic	RES SMD 11.5K OHM 0.1% 1/4W 0805	4566
ERA-3VEB4530V Panasonic	RES 453 OHM 0.1% 1/8W 0603	0
ERJ-U2RD1622X Panasonic	RES 16.2K OHM 0.5% 1/10W 0402 SM	0
ERJ-P14J561U Panasonic	RES SMD 560 OHM 5% 1/2W 1210	9957
ERA-2VEB2051X Panasonic	RES 2.05K OHM 0.1% 1/10W 0402	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