Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
SR1-0603-291 NTE Electronics, Inc.	RES 9.1K OHM 5% 1/16W 0603	2947
SR1-0805-413 NTE Electronics, Inc.	RES 130K OHM 5% 1/8W 0805	1708
SR1-0805-443 NTE Electronics, Inc.	RES 430K OHM 5% 1/8W 0805	2552
SR1-0805-168 NTE Electronics, Inc.	RES 680 OHM 5% 1/8W 0805	8700
SR1-0805-091 NTE Electronics, Inc.	RES 91 OHM 5% 1/8W 0805	4289
SR1-1206-116 NTE Electronics, Inc.	RES 160 OHM 5% 1/4W 1206	3350
SR1-0805-439 NTE Electronics, Inc.	RES 390K OHM 5% 1/8W 0805	2110
SR1-1206-033 NTE Electronics, Inc.	RES 33 OHM 5% 1/4W 1206	3604
SR1-0603-182 NTE Electronics, Inc.	RES 820 OHM 5% 1/16W 0603	907
SR1-1206-411 NTE Electronics, Inc.	RES 110K OHM 5% 1/4W 1206	2122
SR1-0603-224 NTE Electronics, Inc.	RES 2.4K OHM 5% 1/16W 0603	4264
SR1-1206-30 NTE Electronics, Inc.	RES 10K OHM 5% 1/4W 1206	0
SR1-0603-4D3 NTE Electronics, Inc.	RES 4.3 OHM 5% 1/16W 0603	488
SR1-0805-347 NTE Electronics, Inc.	RES 47K OHM 5% 1/8W 0805	1541
SR1-0603-8D2 NTE Electronics, Inc.	RES 8.2 OHM 5% 1/16W 0603	775
SR1-0805-368 NTE Electronics, Inc.	RES 68K OHM 5% 1/8W 0805	2787
SR1-0603-047 NTE Electronics, Inc.	RES 47 OHM 5% 1/16W 0603	1494
SR1-1206-262 NTE Electronics, Inc.	RES 6.2K OHM 5% 1/4W 1206	1705
SR1-0603-362 NTE Electronics, Inc.	RES 62K OHM 5% 1/16W 0603	1896
SR1-0805-9D1 NTE Electronics, Inc.	RES 9.1 OHM 5% 1/8W 0805	1115

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