Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
SR1-0603-168 NTE Electronics, Inc.	RES 680 OHM 5% 1/16W 0603	3800
SR1-0805-212 NTE Electronics, Inc.	RES 1.2K OHM 5% 1/8W 0805	2788
SR1-0805-175 NTE Electronics, Inc.	RES 750 OHM 5% 1/8W 0805	2581
SR1-1206-227 NTE Electronics, Inc.	RES 2.7K OHM 5% 1/4W 1206	3628
SR1-1206-130 NTE Electronics, Inc.	RES 300 OHM 5% 1/4W 1206	4156
SR1-0603-2D4 NTE Electronics, Inc.	RES 2.4 OHM 5% 1/16W 0603	637
SR1-1206-251 NTE Electronics, Inc.	RES 5.1K OHM 5% 1/4W 1206	3127
SR1-0805-7D5 NTE Electronics, Inc.	RES 7.5 OHM 5% 1/8W 0805	750
SR1-0805-412 NTE Electronics, Inc.	RES 120K OHM 5% 1/8W 0805	3156
SR1-1206-336 NTE Electronics, Inc.	RES 36K OHM 5% 1/4W 1206	1823
SR1-1206-1D0 NTE Electronics, Inc.	RES 1 OHM 5% 1/4W 1206	1826
SR1-0805-222 NTE Electronics, Inc.	RES 2.2K OHM 5% 1/8W 0805	1257
SR1-1206-356 NTE Electronics, Inc.	RES 56K OHM 5% 1/4W 1206	796
SR1-1206-324 NTE Electronics, Inc.	RES 27K OHM 5% 1/4W 1206	300
SR1-1206-313 NTE Electronics, Inc.	RES 15K OHM 5% 1/4W 1206	1198
SR1-1206-315 NTE Electronics, Inc.	RES 16K OHM 5% 1/4W 1206	836
SR1-1206-2D4 NTE Electronics, Inc.	RES 2.4 OHM 5% 1/4W 1206	2692
SR1-0603-110 NTE Electronics, Inc.	RES 100 OHM 5% 1/16W 0603	1432
SR1-1206-311 NTE Electronics, Inc.	RES 12K OHM 5% 1/4W 1206	2156
SR1-0805-013 NTE Electronics, Inc.	RES 13 OHM 5% 1/8W 0805	1920

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