Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
SR1-0805-316 NTE Electronics, Inc.	RES 16K OHM 5% 1/8W 0805	1648
SR1-1206-430 NTE Electronics, Inc.	RES 300K OHM 5% 1/4W 1206	1938
SR1-1206-220 NTE Electronics, Inc.	RES 2K OHM 5% 1/4W 1206	3467
SR1-1206-320 NTE Electronics, Inc.	RES 22K OHM 5% 1/4W 1206	2248
SR1-1206-139 NTE Electronics, Inc.	RES 390 OHM 5% 1/4W 1206	2984
SR1-1206-175 NTE Electronics, Inc.	RES 750 OHM 5% 1/4W 1206	313
SR1-1206-056 NTE Electronics, Inc.	RES 56 OHM 5% 1/4W 1206	2362
SR1-0603-415 NTE Electronics, Inc.	RES 150K OHM 5% 1/16W 0603	4160
SR1-0603-118 NTE Electronics, Inc.	RES 180 OHM 5% 1/16W 0603	190
SR1-0603-391 NTE Electronics, Inc.	RES 91K OHM 5% 1/16W 0603	548
SR1-0805-256 NTE Electronics, Inc.	RES 5.6K OHM 5% 1/8W 0805	2848
SR1-1206-424 NTE Electronics, Inc.	RES 240K OHM 5% 1/4W 1206	2703
SR1-1206-382 NTE Electronics, Inc.	RES 82K OHM 5% 1/4W 1206	1339
SR1-0603-3D0 NTE Electronics, Inc.	RES 3 OHM 5% 1/16W 0603	3652
SR1-0603-433 NTE Electronics, Inc.	RES 330K OHM 5% 1/16W 0603	812
SR1-0805-415 NTE Electronics, Inc.	RES 150K OHM 5% 1/8W 0805	1669
SR1-0603-211 NTE Electronics, Inc.	RES 1.1K OHM 5% 1/16W 0603	345
SR1-0805-191 NTE Electronics, Inc.	RES 910 OHM 5% 1/8W 0805	558
SR1-0805-433 NTE Electronics, Inc.	RES 330K OHM 5% 1/8W 0805	796
SR1-0603-233 NTE Electronics, Inc.	RES 3.3K OHM 5% 1/16W 0603	3791

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