Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
SR1-0603-112 NTE Electronics, Inc.	RES 120 OHM 5% 1/16W 0603	1627
SR1-0805-224 NTE Electronics, Inc.	RES 2.4K OHM 5% 1/8W 0805	556
SR1-0805-115 NTE Electronics, Inc.	RES 150 OHM 5% 1/8W 0805	2824
SR1-0805-233 NTE Electronics, Inc.	RES 3.3K OHM 5% 1/8W 0805	1061
SR1-1206-475 NTE Electronics, Inc.	RES 750K OHM 5% 1/4W 1206	2632
SR1-0805-5D1 NTE Electronics, Inc.	RES 5.1 OHM 5% 1/8W 0805	3906
SR1-0603-422 NTE Electronics, Inc.	RES 220K OHM 5% 1/16W 0603	1589
SR1-0805-327 NTE Electronics, Inc.	RES 27K OHM 5% 1/8W 0805	3656
SR1-1206-012 NTE Electronics, Inc.	RES 12 OHM 5% 1/4W 1206	1630
SR1-0603-2D2 NTE Electronics, Inc.	RES 2.2 OHM 5% 1/16W 0603	4954
SR1-1206-420 NTE Electronics, Inc.	RES 200K OHM 5% 1/4W 1206	2248
SR1-1206-211 NTE Electronics, Inc.	RES 1.1K OHM 5% 1/4W 1206	3993
SR1-0805-275 NTE Electronics, Inc.	RES 7.5K OHM 5% 1/8W 0805	3952
SR1-0805-311 NTE Electronics, Inc.	RES 11K OHM 5% 1/8W 0805	273
SR1-0805-491 NTE Electronics, Inc.	RES 910K OHM 5% 1/8W 0805	2099
SR1-0603-116 NTE Electronics, Inc.	RES 160 OHM 5% 1/16W 0603	795
SR1-0603-324 NTE Electronics, Inc.	RES 24K OHM 5% 1/16W 0603	3915
SR1-1206-282 NTE Electronics, Inc.	RES 8.2K OHM 5% 1/4W 1206	4901
SR1-0603-236 NTE Electronics, Inc.	RES 3.6K OHM 5% 1/16W 0603	1410
SR1-0805-391 NTE Electronics, Inc.	RES 91K OHM 5% 1/8W 0805	3672

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