Surface Mount Fixed Resistors

Resistors are referred to as a Passive Component. Surface Mount Resistors are more commonly known as SMD (surface mount device) or SMT (Surface mount technology) Resistors. These resistors offer advantages in space saving on Printed Circuit Boards (PCB’s).


Some common package sizes are 0201,0402,0603,0805,1206,1210,2020,2512


SMD Resistors are used in large volumes and are the preferred choice in electronics equipment due to their small size and high reliability. SMD resistors are particularly used in telecommunication, automotive (AEC Q200 qualified) and medical equipment, they also found in personal devices, displays and advanced technology research instruments.


SMD Fixed Resistors


Surface mount fixed resistors are the most widely used resistors as they reduce the flow of the electrical current in circuits. Similar to water flowing along a pipe, the tap controls the flow of water, a resistor controls the flow of current. They work to a fixed value the resistance does not change in temperature or voltage. The most commonly used fixed resistors values are 100KΩ,10kΩ,100Ω, 10Ω


Types of surface mount fixed resistors


  • Thin Film Resistors have a higher precision than the thick film

  • Thick Film Resistors are used for general use due to a lower price point.

  • Moulded Wirewound Resistors offer higher power

  • Foil Resistors for ultra-high precision and really low-Temperature coefficient of resistance

  • Shunts (current sense) Low ohmic values for where current measurement is critical

  • Melf (cylindrical) offering superb pulse load capability

What are surface mount fixed resistors used for?


SMD fixed resistors are very compact and used in most electronic board design. Due to their compact size and the continuous development of ever smaller footprints, this has allowed for the development of ever smaller PCB designs and the ability to get more from the board. The resistors can assist in the reduction of component count on the board.


High Power / Surge / pulse protection


Many manufacturers offer a higher power alternative for the various packages they have available. As an example the 0603 resistor package can vary from 0.1W to 0.25W (rated dissipation 70°C). The higher power alternatives can be used in applications where there is a need to protect against surges / pulses.


What is the difference between Thin Film Resistors and Thick Film Resistors?


The main difference being that the thick film resistors have a paste fired on to the manufacturers chosen substrate. Thin film resistors as the name suggests has an extremely thin metal film that is generally vacuum deposited on to the manufacturers chosen substrate.


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Description Price Resistance Package/Case Technology Tolerance Power Rating Temperature Coefficient Automotive Standard Dimensions Length Depth Height Series Minimum Operating Temperature Maximum Operating Temperature
RS Stock No. 893-4437
Mfr. Part No.HVC0805T1006JET
BrandOhmite
€1.573
Each (In a Pack of 50)
units
100 MΩ 0805 (2012M) Wrap Around ±5% 0.125W ±100ppm/°C - - - - - HVC -55°C +155°C
RS Stock No. 893-4478
Mfr. Part No.HVC1206Z1008KET
BrandOhmite
€7.44
Each
units
10 GΩ 1206 (3216M) Wrap Around ±10% 0.25W ±250ppm/°C - - - - - HVC -55°C +155°C
RS Stock No. 893-5566
Mfr. Part No.RW5S0FA1K00JE
BrandOhmite
€0.741
Each (In a Pack of 300)
units
1 kΩ - Wire Wound ±5% 5W ±20ppm/°C - - - - - RW -55°C +150°C
RS Stock No. 893-5503
Mfr. Part No.FC4L64R025FER
BrandOhmite
€1.041
Each (In a Pack of 50)
units
25 mΩ 6432 Metal Foil ±1% 2W ±50ppm/°C - - - - - FC4L -55°C +155°C
RS Stock No. 893-3396
Mfr. Part No.605SJR00375E
BrandOhmite
€1.008
Each (In a Pack of 100)
units
3.75 mΩ 4412 Metal Plate ±5% 0.5W ±100ppm/°C - - - - - 605SJR -40°C +155°C
RS Stock No. 893-4368
Mfr. Part No.605SJR00800E-T
BrandOhmite
€0.631
Each (In a Pack of 2000)
units
8 mΩ 4412 Metal Plate ±5% 0.5W ±100ppm/°C - - - - - 605SJR -40°C +155°C
RS Stock No. 893-3636
Mfr. Part No.FCSL64R005FER
BrandOhmite
€398.66
Each (In a Pack of 1000)
units
5 mΩ 6432 Metal Foil ±1% 2W ±50ppm/°C - - - - - FCSL -55°C +155°C
RS Stock No. 893-3967
Mfr. Part No.LVK12R024FER
BrandOhmite
€0.393
Each (In a Pack of 50)
units
24 mΩ 1206 (3216M) Metal Strip ±1% 0.5W ±50ppm/°C - - - - - LVK12 -40°C +125°C
RS Stock No. 893-4308
Mfr. Part No.FC4L110R001JER
BrandOhmite
€1.338
Each (In a Pack of 1000)
units
1 mΩ 11050 Metal Foil ±5% 5W ±100ppm/°C - - - - - FC4L -55°C +155°C
RS Stock No. 893-3598
Mfr. Part No.MCS3264R005FER
BrandOhmite
€0.411
Each (In a Pack of 50)
units
5 mΩ 3264 Metal Strip ±1% 2W ±50ppm/°C - - - - - MCS +70°C +150°C
RS Stock No. 893-3652
Mfr. Part No.FCSL76R025FER
BrandOhmite
€0.491
Each (In a Pack of 1000)
units
25 mΩ 7638 Metal Foil ±1% 3W ±50ppm/°C - - - - - FCSL -55°C +155°C
RS Stock No. 893-5507
Mfr. Part No.FC4L64R050FER
BrandOhmite
€0.649
Each (In a Pack of 1000)
units
50 mΩ 6432 Metal Foil ±1% 2W ±50ppm/°C - - - - - FC4L -55°C +155°C
RS Stock No. 893-4370
Mfr. Part No.610SJR00300E-T
BrandOhmite
€0.657
Each (In a Pack of 3000)
units
3 mΩ J Bend Metal Plate ±5% 1W ±350ppm/°C - - - - - 610SJR -40°C +155°C
RS Stock No. 893-5544
Mfr. Part No.RW5S0FAR100FE
BrandOhmite
€0.741
Each (In a Pack of 300)
units
100 mΩ L Bend Wire Wound ±1% 5W ±90ppm/°C - - - - - RW -55°C +150°C
RS Stock No. 892-6626
Mfr. Part No.HVF1206T1007JE
BrandOhmite
€2.879
Each (In a Pack of 100)
units
1 GΩ 1206 (3216M) Thick Film ±5% 0.3W ±100ppm/°C - - - - - HVF -55°C +200°C
RS Stock No. 893-4914
Mfr. Part No.FCSL110R050FER
BrandOhmite
€0.875
Each (In a Pack of 1000)
units
50 mΩ 11050 Metal Foil ±1% 5W ±50ppm/°C - - - - - FCSL -55°C +155°C
RS Stock No. 893-3591
Mfr. Part No.MCS3264R010FER
BrandOhmite
€0.205
Each (In a Pack of 4000)
units
10 mΩ 3264 Metal Alloy ±1% 2W ±50ppm/°C - - - - - MCS +70°C +150°C
RS Stock No. 893-3589
Mfr. Part No.MCS1632R050FER
BrandOhmite
€0.166
Each (In a Pack of 5000)
units
50 mΩ 1632 Metal Alloy ±1% 1W ±50ppm/°C - - - - - MCS +70°C +150°C
RS Stock No. 893-3655
Mfr. Part No.FCSL90R010FER
BrandOhmite
€0.587
Each (In a Pack of 1000)
units
10 mΩ 9045 Metal Foil ±1% 4W ±50ppm/°C - - - - - FCSL -55°C +155°C
RS Stock No. 892-8653
Mfr. Part No.602SJR00500E
BrandOhmite
€1.008
Each (In a Pack of 100)
units
5 mΩ 4412 Metal Plate ±5% 0.25W ±100ppm/°C - - - - - 602SJR -40°C +155°C