Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
SR1-1206-218 NTE Electronics, Inc.	RES 1.8K OHM 5% 1/4W 1206	2540
SR1-0603-368 NTE Electronics, Inc.	RES 68K OHM 5% 1/16W 0603	3933
SR1-0603-427 NTE Electronics, Inc.	RES 270K OHM 5% 1/16W 0603	324
SR1-0603-418 NTE Electronics, Inc.	RES 180K OHM 5% 1/16W 0603	1222
SR1-0805-056 NTE Electronics, Inc.	RES 56 OHM 5% 1/8W 0805	757
SR1-1206-343 NTE Electronics, Inc.	RES 43K OHM 5% 1/4W 1206	2357
SR1-0805-424 NTE Electronics, Inc.	RES 240K OHM 5% 1/8W 0805	1408
SR1-1206-120 NTE Electronics, Inc.	RES 200 OHM 5% 1/4W 1206	3773
SR1-1206-312 NTE Electronics, Inc.	RES 13K OHM 5% 1/4W 1206	1835
SR1-0805-251 NTE Electronics, Inc.	RES 5.1K OHM 5% 1/8W 0805	4025
SR1-0805-475 NTE Electronics, Inc.	RES 750K OHM 5% 1/8W 0805	3040
SR1-0603-475 NTE Electronics, Inc.	RES 750K OHM 5% 1/16W 0603	1415
SR1-0805-313 NTE Electronics, Inc.	RES 13K OHM 5% 1/8W 0805	1628
SR1-0805-000 NTE Electronics, Inc.	RES 0 OHM 5% 1/8W 0805	3632
SR1-1206-068 NTE Electronics, Inc.	RES 68 OHM 5% 1/4W 1206	1883
SR1-0603-318 NTE Electronics, Inc.	RES 18K OHM 5% 1/16W 0603	269
SR1-0603-2D0 NTE Electronics, Inc.	RES 2 OHM 5% 1/16W 0603	3656
SR1-1206-062 NTE Electronics, Inc.	RES 62 OHM 5% 1/4W 1206	2814
SR1-0603-4D7 NTE Electronics, Inc.	RES 4.7 OHM 5% 1/16W 0603	2034
SR1-0805-082 NTE Electronics, Inc.	RES 82 OHM 5% 1/8W 0805	2149

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