Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
SR1-0603-462 NTE Electronics, Inc.	RES 620K OHM 5% 1/16W 0603	1611
SR1-0603-043 NTE Electronics, Inc.	RES 43 OHM 5% 1/16W 0603	1132
SR1-1206-427 NTE Electronics, Inc.	RES 270K OHM 5% 1/4W 1206	2135
SR1-0805-136 NTE Electronics, Inc.	RES 360 OHM 5% 1/8W 0805	3126
SR1-1206-268 NTE Electronics, Inc.	RES 6.8K OHM 5% 1/4W 1206	2912
SR1-0603-133 NTE Electronics, Inc.	RES 330 OHM 5% 1/16W 0603	3592
SR1-0603-327 NTE Electronics, Inc.	RES 27K OHM 5% 1/16W 0603	3180
SR1-0603-015 NTE Electronics, Inc.	RES 15 OHM 5% 1/16W 0603	3364
SR1-0603-210 NTE Electronics, Inc.	RES 1K OHM 5% 1/16W 0603	803
SR1-1206-182 NTE Electronics, Inc.	RES 820 OHM 5% 1/4W 1206	594
SR1-0805-315 NTE Electronics, Inc.	RES 15K OHM 5% 1/8W 0805	4960
SR1-0805-236 NTE Electronics, Inc.	RES 3.6K OHM 5% 1/8W 0805	656
SR1-0603-347 NTE Electronics, Inc.	RES 47K OHM 5% 1/16W 0603	1155
SR1-1206-6D2 NTE Electronics, Inc.	RES 6.2 OHM 5% 1/4W 1206	2540
SR1-1206-122 NTE Electronics, Inc.	RES 220 OHM 5% 1/4W 1206	1121
SR1-0805-339 NTE Electronics, Inc.	RES 39K OHM 5% 1/8W 0805	3948
SR1-0603-020 NTE Electronics, Inc.	RES 20 OHM 5% 1/16W 0603	2732
SR1-1206-115 NTE Electronics, Inc.	RES 150 OHM 5% 1/4W 1206	3259
SR1-1206-112 NTE Electronics, Inc.	RES 120 OHM 5% 1/4W 1206	3926
SR1-1206-162 NTE Electronics, Inc.	RES 620 OHM 5% 1/4W 1206	3756

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