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Chip Resistors-Surface Mount

Image Part Number Description / PDF Quantity Rfq
RN731JTTD3971C10

RN731JTTD3971C10

KOA Speer Electronics, Inc.

RES 3.97K OHM 0.25% 1/16W 0603

0
RN73R1ETTP8200B50

RN73R1ETTP8200B50

KOA Speer Electronics, Inc.

RES 820 OHM 0.1% 1/16W 0402

0
RS73G2BTTD1403F

RS73G2BTTD1403F

KOA Speer Electronics, Inc.

RES 140K OHM 1% 1/3W 1206

0
RS73F2ATTD1103B

RS73F2ATTD1103B

KOA Speer Electronics, Inc.

RES 110K OHM 0.1% 1/4W 0805

0
RS73G2ATTD3241D

RS73G2ATTD3241D

KOA Speer Electronics, Inc.

RES 3.24K OHM 0.5% 1/4W 0805

0
RN73R1JTTD4642C25

RN73R1JTTD4642C25

KOA Speer Electronics, Inc.

RES 46.4K OHM 0.25% 1/10W 0603

0
WK73R1ETTP8250F

WK73R1ETTP8250F

KOA Speer Electronics, Inc.

RES 825 OHM 1% 1/3W 0402

0
RN73H2BTTD4172C10

RN73H2BTTD4172C10

KOA Speer Electronics, Inc.

RES 41.7K OHM 0.25% 1/4W 1206

0
RK73H1ETTP1743F

RK73H1ETTP1743F

KOA Speer Electronics, Inc.

RES 174K OHM 1% 1/10W 0402

92448
RN73R1JTTD3880B05

RN73R1JTTD3880B05

KOA Speer Electronics, Inc.

RES 388 OHM 0.1% 1/10W 0603

0
RN73R1ETTP2521B10

RN73R1ETTP2521B10

KOA Speer Electronics, Inc.

RES 2.52K OHM 0.1% 1/16W 0402

0
RN73R2ETTD5760F50

RN73R2ETTD5760F50

KOA Speer Electronics, Inc.

RESISTOR THIN FILM 1210 SIZE 1%

0
RN73R1ETTP1210F10

RN73R1ETTP1210F10

KOA Speer Electronics, Inc.

RES 121 OHM 1% 1/16W 0402

0
RN73R2ATTD17R4D25

RN73R2ATTD17R4D25

KOA Speer Electronics, Inc.

RES 17.4 OHM 0.5% 1/8W 0805

0
RN73H1JTTD2131C10

RN73H1JTTD2131C10

KOA Speer Electronics, Inc.

RES 2.13K OHM 0.25% 1/10W 0603

0
RN73H2ATTD1890B50

RN73H2ATTD1890B50

KOA Speer Electronics, Inc.

RES 189 OHM 0.1% 1/8W 0805

0
RN73R2ETTD47R0F100

RN73R2ETTD47R0F100

KOA Speer Electronics, Inc.

RESISTOR THIN FILM 1210 SIZE 1%

0
RK73H2ERTTD5490D

RK73H2ERTTD5490D

KOA Speer Electronics, Inc.

RESISTOR ANTI SULFUR

0
SG73S1ETTP7501D

SG73S1ETTP7501D

KOA Speer Electronics, Inc.

RES 7.5K OHM 0.5% 1/8W 0402

0
RN73H2ATTD4422C50

RN73H2ATTD4422C50

KOA Speer Electronics, Inc.

RES 44.2K OHM 0.25% 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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