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Chip Resistors-Surface Mount

Image Part Number Description / PDF Quantity Rfq
RN73R2ATTD1052D10

RN73R2ATTD1052D10

KOA Speer Electronics, Inc.

RES 10.5K OHM 0.5% 1/8W 0805

0
RN73H2BTTD5051B25

RN73H2BTTD5051B25

KOA Speer Electronics, Inc.

RES 5.05K OHM 0.1% 1/4W 1206

0
RN731JTTD68R1D50

RN731JTTD68R1D50

KOA Speer Electronics, Inc.

RES 68.1 OHM 0.5% 1/16W 0603

0
RN73H1ETTP1871D10

RN73H1ETTP1871D10

KOA Speer Electronics, Inc.

RES 1.87K OHM 0.5% 1/16W 0402

0
RK73H1ETTP2491F

RK73H1ETTP2491F

KOA Speer Electronics, Inc.

RES 2.49K OHM 1% 1/10W 0402

77571
RN73R1ETTP1050C50

RN73R1ETTP1050C50

KOA Speer Electronics, Inc.

RES 105 OHM 0.25% 1/16W 0402

0
HV73V2BTTD5233F

HV73V2BTTD5233F

KOA Speer Electronics, Inc.

RES 523K OHM 1% 1/4W 1206

0
RN73H1JTTD16R4B25

RN73H1JTTD16R4B25

KOA Speer Electronics, Inc.

RES 16.4 OHM 0.1% 1/10W 0603

0
RN73H2BTTD4021D100

RN73H2BTTD4021D100

KOA Speer Electronics, Inc.

RES 4.02K OHM 0.5% 1/4W 1206

0
HV733ATTE9762F

HV733ATTE9762F

KOA Speer Electronics, Inc.

RES 97.6K OHM 1% 1W 2512

0
RK73H1JTTD4303D

RK73H1JTTD4303D

KOA Speer Electronics, Inc.

RES 430K OHM 0.5% 1/10W 0603

0
RN73H1JTTD3973F25

RN73H1JTTD3973F25

KOA Speer Electronics, Inc.

RES 397K OHM 1% 1/10W 0603

0
RN731JTTD1170B25

RN731JTTD1170B25

KOA Speer Electronics, Inc.

RES 117 OHM 0.1% 1/16W 0603

0
RN73H2ETTD9533F100

RN73H2ETTD9533F100

KOA Speer Electronics, Inc.

RES 953K OHM 1% 1/4W 1210

0
RN73R2ATTD6802C50

RN73R2ATTD6802C50

KOA Speer Electronics, Inc.

RES 68K OHM 0.25% 1/8W 0805

0
WK73R2ATTD2051F

WK73R2ATTD2051F

KOA Speer Electronics, Inc.

RES 2.05K OHM 1% 1W 0805

0
RN73H2ETTD1232D25

RN73H2ETTD1232D25

KOA Speer Electronics, Inc.

RES 12.3K OHM 0.5% 1/4W 1210

0
RN73H2ATTD7062A25

RN73H2ATTD7062A25

KOA Speer Electronics, Inc.

RES 70.6K OHM 0.05% 1/8W 0805

0
HV731JTTD134G

HV731JTTD134G

KOA Speer Electronics, Inc.

RES 130K OHM 2% 1/10W 0603

0
RN731JTTD2461B25

RN731JTTD2461B25

KOA Speer Electronics, Inc.

RES 2.46K OHM 0.1% 1/16W 0603

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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