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
TWD62.20
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. 893-4443
Mfr. Part No.HVC0805Z1008KET
BrandOhmite
TWD326.00
Each
units
10 GΩ 0805 (2012M) Wrap Around ±10% 0.125W ±250ppm/°C - - - - - HVC -55°C +155°C
RS Stock No. 893-5500
Mfr. Part No.FC4L64R010FER
BrandOhmite
TWD24.50
Each (In a Pack of 1000)
units
10 mΩ 6432 Metal Foil ±1% 2W ±50ppm/°C - - - - - FC4L -55°C +155°C
RS Stock No. 892-8004
Mfr. Part No.RW1S5CAR010JE
BrandOhmite
TWD66.50
Each (In a Pack of 100)
units
10 mΩ - Wire Wound ±5% 1.5W ±90ppm/°C - - - - - RW -55°C +150°C
RS Stock No. 892-8007
Mfr. Part No.RW1S0CKR050DE
BrandOhmite
TWD213.30
Each (In a Pack of 10)
units
50 mΩ - Metal Strip ±0.5% 1W ±50ppm/°C - - - - - RW1 -55°C +150°C
RS Stock No. 893-4352
Mfr. Part No.605SJR00200E-T
BrandOhmite
TWD34.70
Each (In a Pack of 2000)
units
2 mΩ 4412 Metal Plate ±5% 0.5W ±100ppm/°C - - - - - 605SJR -40°C +155°C
RS Stock No. 893-4421
Mfr. Part No.HVC0805T5004JET
BrandOhmite
TWD27.50
Each (In a Pack of 500)
units
5 MΩ 0805 (2012M) Wrap Around ±5% 0.125W ±100ppm/°C - - - - - HVC -55°C +155°C
RS Stock No. 893-4355
Mfr. Part No.602SJR00300E-T
BrandOhmite
TWD35.70
Each (In a Pack of 2000)
units
3 mΩ 4412 Metal Plate ±5% 0.25W ±100ppm/°C - - - - - 602SJR -40°C +155°C
RS Stock No. 892-8010
Mfr. Part No.RW3R5EAR010JE
BrandOhmite
TWD82.80
Each (In a Pack of 100)
units
10 mΩ - Wire Wound ±5% 3.5W ±90ppm/°C - - - - - RW -55°C +150°C
RS Stock No. 893-4478
Mfr. Part No.HVC1206Z1008KET
BrandOhmite
TWD270.00
Each
units
10 GΩ 1206 (3216M) Wrap Around ±10% 0.25W ±250ppm/°C - - - - - HVC -55°C +155°C
RS Stock No. 892-8013
Mfr. Part No.RW2S0CBR050JET
BrandOhmite
TWD38.90
Each (In a Pack of 1000)
units
50 mΩ - Wire Wound ±5% 2W ±90ppm/°C - - - - - RW -55°C +150°C
RS Stock No. 893-4358
Mfr. Part No.602SJR00500E-T
BrandOhmite
TWD35.70
Each (In a Pack of 2000)
units
5 mΩ 4412 Metal Plate ±5% 0.25W ±100ppm/°C - - - - - 602SJR -40°C +155°C
RS Stock No. 893-4308
Mfr. Part No.FC4L110R001JER
BrandOhmite
TWD63.50
Each (In a Pack of 1000)
units
1 mΩ 11050 Metal Foil ±5% 5W ±100ppm/°C - - - - - FC4L -55°C +155°C
RS Stock No. 893-4361
Mfr. Part No.605SJR00375E-T
BrandOhmite
TWD21.90
Each (In a Pack of 2000)
units
3.75 mΩ 4412 Metal Plate ±5% 0.5W ±100ppm/°C - - - - - 605SJR -40°C +155°C
RS Stock No. 893-4428
Mfr. Part No.HVC0805T1004JET
BrandOhmite
TWD27.50
Each (In a Pack of 500)
units
1 MΩ 0805 (2012M) Wrap Around ±5% 0.125W ±100ppm/°C - - - - - HVC -55°C +155°C
RS Stock No. 893-3967
Mfr. Part No.LVK12R024FER
BrandOhmite
TWD18.90
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. 893-3614
Mfr. Part No.FCSL64R001JER
BrandOhmite
TWD14.10
Each (In a Pack of 1000)
units
1 mΩ 6432 Metal Foil ±5% 2W ±150ppm/°C - - - - - FCSL -55°C +155°C
RS Stock No. 892-8016
Mfr. Part No.RW2S0CBR200JE
BrandOhmite
TWD82.80
Each (In a Pack of 100)
units
200 mΩ - Wire Wound ±5% 2W ±90ppm/°C - - - - - RW -55°C +150°C
RS Stock No. 891-8479
Mfr. Part No.TA810PA100RJE
BrandOhmite
TWD73.70
Each (In a Pack of 100)
units
100 Ω - Thick Film ±5% 10W 100ppm/°C - - - - - TA -55°C +180°C
RS Stock No. 893-3633
Mfr. Part No.FCSL90R002GER
BrandOhmite
TWD21.50
Each (In a Pack of 1000)
units
2 mΩ 3518 Metal Foil ±2% 4W ±100ppm/°C - - - - - FCSL -55°C +155°C