Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERA-2AEB1241X Panasonic	RES SMD 1.24KOHM 0.1% 1/16W 0402	19725
ERJ-P03D1403V Panasonic	RES SMD 140 KOHM 0.5% 1/5W 0603	0
ERJ-P6WF1021V Panasonic	RES SMD 1.02K OHM 1% 1/2W 0805	0
ERJ-U03F71R5V Panasonic	RES 71.5 OHM 1% 1/10W 0603 SMD	0
ERJ-U03J364V Panasonic	RES 360K OHM 5% 1/10W 0603 SMD	5000
ERJ-3EKF1200V Panasonic	RES SMD 120 OHM 1% 1/10W 0603	0
ERJ-14YJ360U Panasonic	RES SMD 36 OHM 5% 1/2W 1210	21592
ERJ-U06F2100V Panasonic	RES 210 OHM 1% 1/8W 0805 SMD	0
ERJ-P14J7R5U Panasonic	RES SMD 7.5 OHM 5% 1/2W 1210	8345
ERJ-PA2F30R0X Panasonic	RES SMD 30 OHM 1% 1/5W 0402	9858
ERJ-U06F4R64V Panasonic	RES 4.64 OHM 1% 1/8W 0805 SMD	0
ERJ-1GEF5600C Panasonic	RES SMD 560 OHM 1% 1/20W 0201	97076
ERJ-2RKD7503X Panasonic	RES 750K OHM 0.5% 1/16W 0402	0
ERA-6AEB910V Panasonic	RES 91 OHM 0.1% 1/8W 0805	7889
ERJ-P08J625V Panasonic	RES SMD 6.2 MOHM 5% 2/3W 1206	0
ERA-6APB103V Panasonic	RES 10K OHM 0.1% 1/8W 0805	0
ERJ-U03F12R1V Panasonic	RES 12.1 OHM 1% 1/10W 0603 SMD	0
ERJ-U1TF1473U Panasonic	RES 147K OHM 1% 1W 2512 SMD	0
ERJ-S12F2671U Panasonic	RES SMD 2.67K OHM 1% 3/4W 1812	0
ERJ-6ENF75R0V Panasonic	RES SMD 75 OHM 1% 1/8W 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