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Chip Resistors-Surface Mount

Image Part Number Description / PDF Quantity Rfq
RN73R2BTTD3322F100

RN73R2BTTD3322F100

KOA Speer Electronics, Inc.

RES 33.2K OHM 1% 1/4W 1206

0
SG73S2ATTD5100D

SG73S2ATTD5100D

KOA Speer Electronics, Inc.

RES 510 OHM 0.5% 1/4W 0805

0
RK73B1HRTTC913J

RK73B1HRTTC913J

KOA Speer Electronics, Inc.

RES 91K OHM 5% 1/20W 0201

0
RN73R2ATTD6570D25

RN73R2ATTD6570D25

KOA Speer Electronics, Inc.

RES 657 OHM 0.5% 1/8W 0805

0
RK73G1JTTD1651C

RK73G1JTTD1651C

KOA Speer Electronics, Inc.

RES 1.65K OHM 0.25% 1/10W 0603

0
RS73F2BTTD4702D

RS73F2BTTD4702D

KOA Speer Electronics, Inc.

RES 47K OHM 0.5% 1/3W 1206

0
RN73H2BTTD3521B05

RN73H2BTTD3521B05

KOA Speer Electronics, Inc.

RES 3.52K OHM 0.1% 1/4W 1206

0
RN73H2BTTD38R8F100

RN73H2BTTD38R8F100

KOA Speer Electronics, Inc.

RES 38.8 OHM 1% 1/4W 1206

0
RN73H2ETTD6982F25

RN73H2ETTD6982F25

KOA Speer Electronics, Inc.

RES 69.8K OHM 1% 1/4W 1210

0
RK73H1JTTD8872D

RK73H1JTTD8872D

KOA Speer Electronics, Inc.

RES 88.7K OHM 0.5% 1/10W 0603

0
RK73H1JTTD3010D

RK73H1JTTD3010D

KOA Speer Electronics, Inc.

RES 301 OHM 0.5% 1/8W 0603

0
RN73R1JTTD3922D100

RN73R1JTTD3922D100

KOA Speer Electronics, Inc.

RES 39.2K OHM 0.5% 1/10W 0603

0
RN73H2BTTD23R2B50

RN73H2BTTD23R2B50

KOA Speer Electronics, Inc.

RES 23.2 OHM 0.1% 1/4W 1206

0
RN73R1JTTD6190F25

RN73R1JTTD6190F25

KOA Speer Electronics, Inc.

RES 619 OHM 1% 1/10W 0603

0
WK73S2ATTD1R30F

WK73S2ATTD1R30F

KOA Speer Electronics, Inc.

RES 1.3 OHM 1% 1W 0805

0
RN73H2BTTD8662C10

RN73H2BTTD8662C10

KOA Speer Electronics, Inc.

RES 86.6K OHM 0.25% 1/4W 1206

0
RK73H1JTTD5601D

RK73H1JTTD5601D

KOA Speer Electronics, Inc.

RES 5.6K OHM 0.5% 1/10W 0603

19770
RN731JTTD3201A25

RN731JTTD3201A25

KOA Speer Electronics, Inc.

RES 3.2K OHM 0.05% 1/16W 0603

0
RS73F2BTTD33R2D

RS73F2BTTD33R2D

KOA Speer Electronics, Inc.

RES 33.2 OHM 0.5% 1/3W 1206

0
RN73H1JTTD2370F25

RN73H1JTTD2370F25

KOA Speer Electronics, Inc.

RES 237 OHM 1% 1/10W 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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