Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ERJ-2RKF78R7X Panasonic	RES SMD 78.7 OHM 1% 1/10W 0402	12691
ERJ-1TNF2151U Panasonic	RES SMD 2.15K OHM 1% 1W 2512	0
ERJ-PA3J2R0V Panasonic	RES SMD 2 OHM 5% 1/4W 0603	3414
ERJ-PA2J131X Panasonic	RES SMD 130 OHM 5% 1/5W 0402	9284
ERJ-8GEYJ434V Panasonic	RES SMD 430K OHM 5% 1/4W 1206	25633
ERJ-P06D3572V Panasonic	RES SMD 35.7 KOHM 0.5% 1/2W 0805	0
ERJ-1GNF1331C Panasonic	RES SMD 1.33K OHM 1% 1/20W 0201	37744
ERJ-PB6D4322V Panasonic	RES SMD 43.2K OHM 0.5% 1/4W 0805	4371
ERJ-8ENF1474V Panasonic	RES SMD 1.47M OHM 1% 1/4W 1206	0
ERJ-S12F5623U Panasonic	RES SMD 562K OHM 1% 3/4W 1812	0
ERA-2VRW2001X Panasonic	RES 2K OHM 0.05% 1/10W 0402	0
ERJ-S1DJ183U Panasonic	RES SMD 18K OHM 5% 3/4W 2010	0
ERA-8APB242V Panasonic	RES SMD 2.4K OHM 0.1% 1/4W 1206	711
ERJ-6CWFR024V Panasonic	RES 0.024 OHM 1% 1/2W 0805	4501
ERJ-P06F93R1V Panasonic	RES SMD 93.1 OHM 1% 1/2W 0805	0
ERA-6VEB2610V Panasonic	RES 261 OHM 0.1% 1/4W 0805	0
ERJ-XGNF5622Y Panasonic	RES 56.2K OHM 1% 1/32W 01005	0
ERJ-S08F5493V Panasonic	RES SMD 549K OHM 1% 1/4W 1206	0
ERJ-PB6B3301V Panasonic	RES SMD 3.3K OHM 0.1% 1/4W 0805	1026
ERJ-H2RD5101X Panasonic	RES 5.1K OHM 0.5% 1/10W 0402	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