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Chip Resistors-Surface Mount

Image Part Number Description / PDF Quantity Rfq
WK73R2ATTD6201F

WK73R2ATTD6201F

KOA Speer Electronics, Inc.

RES 6.2K OHM 1% 1W 0805

0
RN73H2ATTD61R9A10

RN73H2ATTD61R9A10

KOA Speer Electronics, Inc.

RES 61.9 OHM 0.05% 1/8W 0805

0
RN73R2ATTD7060C50

RN73R2ATTD7060C50

KOA Speer Electronics, Inc.

RES 706 OHM 0.25% 1/8W 0805

0
WK73S2BTTD41L2F

WK73S2BTTD41L2F

KOA Speer Electronics, Inc.

RES 41.2M OHM 1% 3/4W 1206

0
RN73H2ETTD9090D50

RN73H2ETTD9090D50

KOA Speer Electronics, Inc.

RES 909 OHM 0.5% 1/4W 1210

0
SG73P2BTTD5903F

SG73P2BTTD5903F

KOA Speer Electronics, Inc.

RES 590K OHM 1% 1/3W 1206

0
RN73H2BTTD1202D10

RN73H2BTTD1202D10

KOA Speer Electronics, Inc.

RES 12K OHM 0.5% 1/4W 1206

0
SG73P1ETTP243G

SG73P1ETTP243G

KOA Speer Electronics, Inc.

RES 24K OHM 2% 1/8W 0402

0
RN73H1JTTD4321C25

RN73H1JTTD4321C25

KOA Speer Electronics, Inc.

RES 4.32K OHM 0.25% 1/10W 0603

0
RN73R2ATTD4870B05

RN73R2ATTD4870B05

KOA Speer Electronics, Inc.

RES 487 OHM 0.1% 1/8W 0805

0
RK73B2ATTD331J

RK73B2ATTD331J

KOA Speer Electronics, Inc.

RES 330 OHM 5% 1/4W 0805

191381
RK73H2BTTD1270F

RK73H2BTTD1270F

KOA Speer Electronics, Inc.

RES 127 OHM 1% 1/4W 1206

14509
WK73R2BTTD2702D

WK73R2BTTD2702D

KOA Speer Electronics, Inc.

RES 27K OHM 0.5% 3/4W 1206

0
RN73R2BTTD1893F100

RN73R2BTTD1893F100

KOA Speer Electronics, Inc.

RES 189K OHM 1% 1/4W 1206

0
RN73H2ETTD16R7D50

RN73H2ETTD16R7D50

KOA Speer Electronics, Inc.

RES 16.7 OHM 0.5% 1/4W 1210

0
RN73R1JTTD5491B05

RN73R1JTTD5491B05

KOA Speer Electronics, Inc.

RES 5.49K OHM 0.1% 1/10W 0603

0
RN73R2BTTD1543F50

RN73R2BTTD1543F50

KOA Speer Electronics, Inc.

RES 154K OHM 1% 1/4W 1206

0
RN73H2ATTD8762C25

RN73H2ATTD8762C25

KOA Speer Electronics, Inc.

RES 87.6K OHM 0.25% 1/8W 0805

0
RN73H2ETTD1402C50

RN73H2ETTD1402C50

KOA Speer Electronics, Inc.

RES 14K OHM 0.25% 1/4W 1210

0
RS73G2ATTD4421C

RS73G2ATTD4421C

KOA Speer Electronics, Inc.

RES 4.42K OHM 0.25% 1/4W 0805

0

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

TypeFunctional CharacteristicsApplication Examples
Thick Film ResistorsCost-effective, standard tolerance ( 1%-5%), power ratings up to 1WConsumer electronics, power supplies
Thin Film ResistorsHigh precision ( 0.01%), low noise, stable temperature coefficientsMedical devices, precision instrumentation
Power ResistorsHigh power dissipation (up to 3W), robust thermal managementMotor drives, EV battery management systems
Network ResistorsMultiple resistors in single package, matched temperature coefficientsDigital circuits, memory modules
Wirewound ResistorsHigh inductance, precise low-resistance valuesAudio 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

ParameterDescriptionImportance
Resistance Range1 to 10M (film), 0.1 to 100k (power)Determines current control capability
Tolerance 0.01% (precision) to 5% (general)Impacts circuit accuracy
Power Rating0.05W to 3W @ 70 CDefines thermal dissipation limits
TCR 5ppm/ C (thin film) to 200ppm/ CAffects stability over temperature
Operating Temp-55 C to +155 CDefines environmental reliability
Voltage Coefficient<0.1ppm/VEnsures 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

ManufacturerRepresentative SeriesKey Features
YageoCRCW Series0.05W-1W, 0.1% tolerance
VishayCRCWE SeriesThin film, TCR 25ppm/ C
ROHMMCR SeriesPower resistors up to 2W
OhmitePWR SeriesHigh-power 3W devices
BournsCRCU SeriesNetwork 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

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