Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERA-1ARC2490C Panasonic	RES SMD 249 OHM 0.25% 1/20W 0201	900
ERJ-P06F6811V Panasonic	RES SMD 6.81 KOHM 1% 1/2W 0805	0
ERA-2AKD120X Panasonic	RES SMD 12 OHM 0.5% 1/16W 0402	41625
ERJ-P06F2672V Panasonic	RES SMD 26.7 KOHM 1% 1/2W 0805	0
ERJ-S02F16R9X Panasonic	RES SMD 16.9 OHM 1% 1/10W 0402	0
ERJ-PA3D63R4V Panasonic	RES SMD 63.4 OHM 0.5% 1/4W 0603	0
ERJ-S1DF24R0U Panasonic	RES SMD 24 OHM 1% 3/4W 2010	0
ERJ-U06F5R49V Panasonic	RES 5.49 OHM 1% 1/8W 0805 SMD	0
ERJ-3EKF8450V Panasonic	RES SMD 845 OHM 1% 1/10W 0603	14640
ERJ-S03F2671V Panasonic	RES SMD 2.67K OHM 1% 1/10W 0603	0
ERA-2AEB2261X Panasonic	RES SMD 2.26KOHM 0.1% 1/16W 0402	22563
ERJ-S1TF9532U Panasonic	RES SMD 95.3K OHM 1% 1W 2512	0
ERJ-PB3B8662V Panasonic	RES SMD 86.6K OHM 0.1% 1/5W 0603	4426
ERA-8ARW1822V Panasonic	RES SMD 18.2KOHM 0.05% 1/4W 1206	960
ERJ-P03D6190V Panasonic	RES SMD 619 OHM 0.5% 1/5W 0603	0
ERJ-P08D8450V Panasonic	RES SMD 845 OHM 0.5% 2/3W 1206	0
ERJ-U02D3902X Panasonic	0402 ANTI-SULFUR RES. , 0.5%, 39	0
ERJ-P08F7150V Panasonic	RES SMD 715 OHM 1% 2/3W 1206	0
ERJ-8ENF8062V Panasonic	RES SMD 80.6K OHM 1% 1/4W 1206	21828
ERJ-U12F1273U Panasonic	RES 127K OHM 1% 3/4W 1812 SMD	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