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Chip Resistors-Surface Mount

Image Part Number Description / PDF Quantity Rfq
RS73G1JTTD5621C

RS73G1JTTD5621C

KOA Speer Electronics, Inc.

RES 5.62K OHM 0.25% 1/5W 0603

0
RN73R2BTTD8871F25

RN73R2BTTD8871F25

KOA Speer Electronics, Inc.

RES 8.87K OHM 1% 1/4W 1206

0
RK73H1ERTTP1472D

RK73H1ERTTP1472D

KOA Speer Electronics, Inc.

RES 14.7K OHM 0.50% 1/10W 0402

0
RN73H2ATTD2581B25

RN73H2ATTD2581B25

KOA Speer Electronics, Inc.

RES 2.58K OHM 0.1% 1/8W 0805

0
RN73H2BTTD2551F50

RN73H2BTTD2551F50

KOA Speer Electronics, Inc.

RES 2.55K OHM 1% 1/4W 1206

0
RN73R1ETTP47R0D10

RN73R1ETTP47R0D10

KOA Speer Electronics, Inc.

RES 47 OHM 0.5% 1/16W 0402

0
RN73H2BTTD2583D100

RN73H2BTTD2583D100

KOA Speer Electronics, Inc.

RES 258K OHM 0.5% 1/4W 1206

0
RS73G1JTTD5623F

RS73G1JTTD5623F

KOA Speer Electronics, Inc.

RES 562K OHM 1% 1/5W 0603

0
RK73B1HRTTC272J

RK73B1HRTTC272J

KOA Speer Electronics, Inc.

RES 2.7K OHM 5% 1/20W 0201

10000
RN73R2ATTD7870C50

RN73R2ATTD7870C50

KOA Speer Electronics, Inc.

RES 787 OHM 0.25% 1/8W 0805

0
RN73R1JTTD7501B10

RN73R1JTTD7501B10

KOA Speer Electronics, Inc.

RES 7.5K OHM 0.1% 1/10W 0603

0
SR731JTTD3R83F

SR731JTTD3R83F

KOA Speer Electronics, Inc.

CURRENT SENSE RESISTOR

0
RK73H1HTTC1620F

RK73H1HTTC1620F

KOA Speer Electronics, Inc.

RES 162 OHM 1% 1/20W 0201

0
RN73H2ETTD1272A25

RN73H2ETTD1272A25

KOA Speer Electronics, Inc.

RES 12.7K OHM 0.05% 1/4W 1210

0
RN73R2ATTD2321A10

RN73R2ATTD2321A10

KOA Speer Electronics, Inc.

RES 2.32K OHM 0.05% 1/8W 0805

0
RN73R2ETTD1803F10

RN73R2ETTD1803F10

KOA Speer Electronics, Inc.

RESISTOR THIN FILM 1210 SIZE 1%

0
RK73H2BRTTD3830F

RK73H2BRTTD3830F

KOA Speer Electronics, Inc.

RES 383 OHM 1% 1/4W 1206

0
RS73G2BTTD1873B

RS73G2BTTD1873B

KOA Speer Electronics, Inc.

RES 187K OHM 0.1% 1/3W 1206

0
RK73H2ATTD2432D

RK73H2ATTD2432D

KOA Speer Electronics, Inc.

RES 24.3K OHM 0.5% 1/4W 0805

0
RS73G2BTTD2053D

RS73G2BTTD2053D

KOA Speer Electronics, Inc.

RES 205K OHM 0.5% 1/3W 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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