Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERA-8APB6810V Panasonic	RES SMD 681 OHM 0.1% 1/4W 1206	890
ERA-2VRW6041X Panasonic	RES 6.04K OHM 0.05% 1/10W 0402	0
ERJ-1TNF6041U Panasonic	RES SMD 6.04K OHM 1% 1W 2512	0
ERJ-PA3F1541V Panasonic	RES SMD 1.54K OHM 1% 1/4W 0603	0
ERJ-P06D4873V Panasonic	RES SMD 487 KOHM 0.5% 1/2W 0805	0
ERA-2AEB222X Panasonic	RES SMD 2.2K OHM 0.1% 1/16W 0402	17858
ERJ-U1DF5363U Panasonic	RES 536K OHM 1% 3/4W 2010 SMD	0
ERJ-UP3F2402V Panasonic	RES 24K OHM 1% 1/4W 0603	4669
ERJ-PA3D12R0V Panasonic	RES SMD 12 OHM 0.5% 1/4W 0603	0
ERJ-U01F7321C Panasonic	RES 7.32K OHM 1% 1/20W 0201 SMD	0
ERJ-S1DF1181U Panasonic	RES SMD 1.18K OHM 1% 3/4W 2010	0
ERJ-UP6F51R0V Panasonic	RES 51 OHM 1% 1/2W 0805	0
ERJ-8GEYJ685V Panasonic	RES SMD 6.8M OHM 5% 1/4W 1206	15982
ERJ-U1TF3902U Panasonic	RES 39K OHM 1% 1W 2512 SMD	0
ERJ-14BQF8R2U Panasonic	RES SMD 8.2 OHM 1% 1/2W 1210	1
ERJ-P08J271V Panasonic	RES SMD 270 OHM 5% 2/3W 1206	8380
ERJ-P14F2742U Panasonic	RES SMD 27.4 KOHM 1% 1/2W 1210	0
ERJ-U3RD3011V Panasonic	RES 3.01K OHM 0.5% 1/10W 0603 SM	0
ERJ-UP3F46R4V Panasonic	RES 46.4 OHM 1% 1.4W 0603	0
ERJ-U03D1023V Panasonic	0603 ANTI-SULFUR RES. , 0.5%, 10	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