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Chip Resistors-Surface Mount

Image Part Number Description / PDF Quantity Rfq
RN73R1ETTP50R5C50

RN73R1ETTP50R5C50

KOA Speer Electronics, Inc.

RES 50.5 OHM 0.25% 1/16W 0402

0
RN731JTTD6492C25

RN731JTTD6492C25

KOA Speer Electronics, Inc.

RES 64.9K OHM 0.25% 1/16W 0603

0
RN73H2ATTD2261D50

RN73H2ATTD2261D50

KOA Speer Electronics, Inc.

RES 2.26K OHM 0.5% 1/8W 0805

0
RN73R2BTTD6733F100

RN73R2BTTD6733F100

KOA Speer Electronics, Inc.

RES 673K OHM 1% 1/4W 1206

0
RN73H2ETTD5831D10

RN73H2ETTD5831D10

KOA Speer Electronics, Inc.

RES 5.83K OHM 0.5% 1/4W 1210

0
RN73R1JTTD5901D100

RN73R1JTTD5901D100

KOA Speer Electronics, Inc.

RES 5.9K OHM 0.5% 1/10W 0603

0
RN731JTTD7230C10

RN731JTTD7230C10

KOA Speer Electronics, Inc.

RES 723 OHM 0.25% 1/16W 0603

0
RN73H2BTTD4300A05

RN73H2BTTD4300A05

KOA Speer Electronics, Inc.

RES 430 OHM 0.05% 1/4W 1206

0
RN73H1JTTD2030C50

RN73H1JTTD2030C50

KOA Speer Electronics, Inc.

RES 203 OHM 0.25% 1/10W 0603

0
RN73H2ETTD4223F100

RN73H2ETTD4223F100

KOA Speer Electronics, Inc.

RES 422K OHM 1% 1/4W 1210

0
RN73H1ETTP2372B50

RN73H1ETTP2372B50

KOA Speer Electronics, Inc.

RES 23.7K OHM 0.1% 1/16W 0402

0
RS73G1JTTD5101C

RS73G1JTTD5101C

KOA Speer Electronics, Inc.

RES 5.1K OHM 0.25% 1/5W 0603

0
RN73R1ETTP5621D25

RN73R1ETTP5621D25

KOA Speer Electronics, Inc.

RES 5.62K OHM 0.5% 1/16W 0402

0
RN73R1JTTD7500F10

RN73R1JTTD7500F10

KOA Speer Electronics, Inc.

RES 750 OHM 1% 1/10W 0603

0
SG73W3ATTE102M

SG73W3ATTE102M

KOA Speer Electronics, Inc.

RES 1K OHM 20% 1W 2512

0
RN73H2ATTD14R3F25

RN73H2ATTD14R3F25

KOA Speer Electronics, Inc.

RES 14.3 OHM 1% 1/8W 0805

0
RN731JTTD5490B50

RN731JTTD5490B50

KOA Speer Electronics, Inc.

RES 549 OHM 0.1% 1/16W 0603

0
RK73H1JTTD1R21F

RK73H1JTTD1R21F

KOA Speer Electronics, Inc.

RES 1.21 OHM 1% 1/8W 0603

21790
RN73H2BTTD19R6D100

RN73H2BTTD19R6D100

KOA Speer Electronics, Inc.

RES 19.6 OHM 0.5% 1/4W 1206

0
RK73B2BRTTD821J

RK73B2BRTTD821J

KOA Speer Electronics, Inc.

RES 820 OHM 5% 1/4W 1206

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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