Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERJ-P14D19R1U Panasonic	RES SMD 19.1 OHM 0.5% 1/2W 1210	0
ERJ-P03J243V Panasonic	RES SMD 24K OHM 5% 1/5W 0603	11838
ERA-6VPB6491V Panasonic	RES 6.49K OHM 0.1% 1/4W 0805	0
ERJ-HP6D8200V Panasonic	RES 820 OHM 0.5% 1/2W 0805	0
ERA-3VRW4321V Panasonic	RES 4.32K OHM 0.05% 1/8W 0603	0
ERJ-P06F4992V Panasonic	RES SMD 49.9 KOHM 1% 1/2W 0805	0
ERJ-B1AJ361U Panasonic	RES SMD 360 OHM 1W 2010 WIDE	0
ERJ-U12F1R87U Panasonic	RES 1.87 OHM 1% 3/4W 1812 SMD	0
ERA-3YEB912V Panasonic	RES SMD 9.1K OHM 0.1% 1/10W 0603	4420
ERJ-HP6J273V Panasonic	RES 27K OHM 5% 1/2W 0805	0
ERA-2VRW1211X Panasonic	RES 1.21K OHM 0.05% 1/10W 0402	0
ERJ-H3EF1541V Panasonic	RES 1.54K OHM 1% 1/6W 0603	0
ERA-8AEB3242V Panasonic	RES SMD 32.4K OHM 0.1% 1/4W 1206	3604
ERA-8AEB1872V Panasonic	RES SMD 18.7K OHM 0.1% 1/4W 1206	1002
ERJ-S03F3R48V Panasonic	RES 3.48 OHM 1% 1/10W 0603 SMD	0
ERJ-2RKF2612X Panasonic	RES SMD 26.1K OHM 1% 1/10W 0402	5960
ERJ-XGNF1072Y Panasonic	RES 10.7K OHM 1% 1/32W 01005	0
ERJ-P06F95R3V Panasonic	RES SMD 95.3 OHM 1% 1/2W 0805	0
ERJ-UP3D3900V Panasonic	RES 390 OHM 0.5% 1.4W 0603	0
ERJ-U02D9761X Panasonic	0402 ANTI-SULFUR RES. , 0.5%, 9.	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