Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERA-1AEB1691C Panasonic	RES SMD 1.69KOHM 0.1% 1/20W 0201	0
ERJ-1GNF4123C Panasonic	RES SMD 412K OHM 1% 1/20W 0201	27680
ERA-3APB681V Panasonic	RES SMD 680 OHM 0.1% 1/10W 0603	4858
ERJ-UP3F4993V Panasonic	RES 499K OHM 1% 1.4W 0603	0
ERJ-S12J475U Panasonic	RES 4.7 M OHM 5% 3/4W 1812 SMD	0
ERJ-PB6D9101V Panasonic	RES SMD 9.1K OHM 0.5% 1/4W 0805	4233
ERJ-P08F30R9V Panasonic	RES SMD 30.9 OHM 1% 2/3W 1206	0
ERJ-P6WJ300V Panasonic	RES SMD 30 OHM 5% 1/2W 0805	0
ERJ-PA3F1431V Panasonic	RES SMD 1.43K OHM 1% 1/4W 0603	0
ERJ-HP6D1600V Panasonic	RES 160 OHM 0.5% 1/2W 0805	0
ERJ-T08J134V Panasonic	RES SMD 130K OHM 5% 1/3W 1206	0
ERJ-PA3F3160V Panasonic	RES SMD 316 OHM 1% 1/4W 0603	0
ERA-6VRW9531V Panasonic	RES 9.53K OHM 0.05% 1/4W 0805	0
ERA-3AEB1471V Panasonic	RES SMD 1.47KOHM 0.1% 1/10W 0603	2851
ERJ-PA2F1823X Panasonic	RES SMD 182 KOHM 1% 1/5W 0402	0
ERJ-3BQJ7R5V Panasonic	RES SMD 7.5 OHM 5% 1/4W 0603	4870
ERJ-U1DF2552U Panasonic	RES 25.5K OHM 1% 3/4W 2010 SMD	0
ERJ-HP6F6491V Panasonic	RES 6.49K OHM 1% 1/2W 0805	0
ERA-8AEB8661V Panasonic	RES SMD 8.66K OHM 0.1% 1/4W 1206	3909
ERJ-1GEF1783C Panasonic	RES SMD 178K OHM 1% 1/20W 0201	452

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