Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERJ-14NF6800U Panasonic	RES SMD 680 OHM 1% 1/2W 1210	0
ERJ-P03F18R2V Panasonic	RES SMD 18.2 OHM 1% 1/5W 0603	0
ERJ-P03D8660V Panasonic	RES SMD 866 OHM 0.5% 1/5W 0603	0
ERA-2AEB84R5X Panasonic	RES SMD 84.5 OHM 0.1% 1/16W 0402	2208
ERJ-1GEF7321C Panasonic	RES SMD 7.32K OHM 1% 1/20W 0201	22071
ERA-3VPB8062V Panasonic	RES 80.6K OHM 0.1% 1/8W 0603	0
ERJ-8ENF2202V Panasonic	RES SMD 22K OHM 1% 1/4W 1206	58754
ERJ-P6WF12R1V Panasonic	RES SMD 12.1 OHM 1% 1/2W 0805	0
ERJ-H3ED35R7V Panasonic	RES 35.7 OHM 0.5% 1/6W 0603	0
ERJ-U01F22R6C Panasonic	RES 22.6 OHM 1% 1/20W 0201 SMD	0
ERJ-U14F9102U Panasonic	RES 91K OHM 1% 1/2W 1210 SMD	0
ERJ-T14J821U Panasonic	RES SMD 820 OHM 5% 1/2W 1210	0
ERJ-U1TF6R04U Panasonic	RES 6.04 OHM 1% 1W 2512 SMD	0
ERA-6VEB3902V Panasonic	RES 39K OHM 0.1% 1/4W 0805	5000
ERJ-U03J155V Panasonic	RES 1.5 M OHM 5% 1/10W 0603 SMD	10000
ERJ-P06F1332V Panasonic	RES SMD 13.3 KOHM 1% 1/2W 0805	0
ERA-3VPB1131V Panasonic	RES 1.13K OHM 0.1% 1/8W 0603	0
ERJ-H3GJ274V Panasonic	RES 270K OHM 5% 1/8W 0603	0
ERJ-UP3F2432V Panasonic	RES 24.3K OHM 1% 1.4W 0603	0
ERA-6VRB1131V Panasonic	RES 1.13K OHM 0.1% 1/4W 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