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Chip Resistors-Surface Mount

Image Part Number Description / PDF Quantity Rfq
561020132004

561020132004

Würth Elektronik Midcom

RES 47 OHM 5% 3/4W 0612

4984
560050320003

560050320003

Würth Elektronik Midcom

RES 0.27 OHM 1% 1/3W 0805

4981
561020132034

561020132034

Würth Elektronik Midcom

RES 2.2 KOHM 1% 3/4W 0612

4832
561020132031

561020132031

Würth Elektronik Midcom

RES 1.5 KOHM 1% 3/4W 0612

4970
560050320001

560050320001

Würth Elektronik Midcom

RES 0.1 OHM 1% 1/3W 0805

4755
580060720008

580060720008

Würth Elektronik Midcom

RES 0.01 OHM 1% 1/2W 0805

3897
561070332081

561070332081

Würth Elektronik Midcom

RES 0.62 OHM 1% 1W 1206

4863
561020163016

561020163016

Würth Elektronik Midcom

RES 2.2 OHM 1% 2W 1225

3978
561020132023

561020132023

Würth Elektronik Midcom

RES 470 OHM 5% 3/4W 0612

4998
561070332055

561070332055

Würth Elektronik Midcom

RES 0.15 OHM 1% 1W 1206

3754
560050310002

560050310002

Würth Elektronik Midcom

RES 0.15 OHM 1% 1/8W 0402

9729
561020163011

561020163011

Würth Elektronik Midcom

RES 270 OHM 1% 2W 1225

3990
561020132014

561020132014

Würth Elektronik Midcom

RES 240 OHM 1% 3/4W 0612

5000
561070332080

561070332080

Würth Elektronik Midcom

RES 0.6 OHM 1% 1W 1206

4339
561020132030

561020132030

Würth Elektronik Midcom

RES 1.2 KOHM 1% 3/4W 0612

4883
561070332071

561070332071

Würth Elektronik Midcom

RES 0.33 OHM 1% 1W 1206

4225
561070332076

561070332076

Würth Elektronik Midcom

RES 0.47 OHM 1% 1W 1206

4638
561070332079

561070332079

Würth Elektronik Midcom

RES 0.56 OHM 1% 1W 1206

4920
561020132008

561020132008

Würth Elektronik Midcom

RES 100 OHM 1% 3/4W 0612

4840
580070763021

580070763021

Würth Elektronik Midcom

RES 0.002 OHM 5% 2W 2512

3977

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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