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Chip Resistors-Surface Mount

Image Part Number Description / PDF Quantity Rfq
RN73R2ATTD38R3C25

RN73R2ATTD38R3C25

KOA Speer Electronics, Inc.

RES 38.3 OHM 0.25% 1/8W 0805

0
RN73R2ETTD9090D50

RN73R2ETTD9090D50

KOA Speer Electronics, Inc.

RESISTOR THIN FILM 1210 SIZE 1%

0
SR732ARTTD2R15F

SR732ARTTD2R15F

KOA Speer Electronics, Inc.

RES 2.15 OHM 1% 1/3W 0805

0
RN731JTTD3522A10

RN731JTTD3522A10

KOA Speer Electronics, Inc.

RES 35.2K OHM 0.05% 1/16W 0603

0
SG73P2ETTD4220F

SG73P2ETTD4220F

KOA Speer Electronics, Inc.

RES 422 OHM 1% 1/2W 1210

0
RK73H1ETTP14R7F

RK73H1ETTP14R7F

KOA Speer Electronics, Inc.

RES 14.7 OHM 1% 1/10W 0402

3158
RN73R1JTTD5303C25

RN73R1JTTD5303C25

KOA Speer Electronics, Inc.

RES 530K OHM 0.25% 1/10W 0603

0
RN73R2BTTD3700F50

RN73R2BTTD3700F50

KOA Speer Electronics, Inc.

RES 370 OHM 1% 1/4W 1206

0
RN73H2ATTD28R4F100

RN73H2ATTD28R4F100

KOA Speer Electronics, Inc.

RES 28.4 OHM 1% 1/8W 0805

0
RN73H2ATTD4930C10

RN73H2ATTD4930C10

KOA Speer Electronics, Inc.

RES 493 OHM 0.25% 1/8W 0805

0
RN73H2ATTD1330D10

RN73H2ATTD1330D10

KOA Speer Electronics, Inc.

RES 133 OHM 0.5% 1/8W 0805

0
RS73G2BTTD6654D

RS73G2BTTD6654D

KOA Speer Electronics, Inc.

RES 6.65M OHM 0.5% 1/3W 1206

0
SG73P2BTTD333J

SG73P2BTTD333J

KOA Speer Electronics, Inc.

RES 33K OHM 5% 1/3W 1206

0
RK73B2HTTE514J

RK73B2HTTE514J

KOA Speer Electronics, Inc.

RES 510K OHM 5% 3/4W 2010

0
RN73H1JTTD2773D25

RN73H1JTTD2773D25

KOA Speer Electronics, Inc.

RES 277K OHM 0.5% 1/10W 0603

0
RK73G1JTTD1961F

RK73G1JTTD1961F

KOA Speer Electronics, Inc.

RES 1.96K OHM 1% 1/10W 0603

0
RS73G1JTTD1433D

RS73G1JTTD1433D

KOA Speer Electronics, Inc.

RES 143K OHM 0.5% 1/5W 0603

0
RN73R2ATTD2640F50

RN73R2ATTD2640F50

KOA Speer Electronics, Inc.

RES 264 OHM 1% 1/8W 0805

0
RK73H2ATTD1240D

RK73H2ATTD1240D

KOA Speer Electronics, Inc.

RES 124 OHM 0.5% 1/4W 0805

0
RN73H2ATTD3792B10

RN73H2ATTD3792B10

KOA Speer Electronics, Inc.

RES 37.9K OHM 0.1% 1/8W 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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