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 (PCBs).

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. 134-5516
Mfr. Part No.CRG1206F1K0
kr 0,098
Each (On a Reel of 5000)
Units
1 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 125-1190
Mfr. Part No.CRG1206F1K0
kr 0,126
Each (In a Bag of 100)
Units
1 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5501
Mfr. Part No.CRG1206F10R
kr 0,098
Each (On a Reel of 5000)
Units
10 Ω 0402 (1005M) Thick Film ±1% 0.25W 100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 223-1997
Mfr. Part No.CRG1206F10R
kr 0,443
Each (In a Pack of 50)
Units
10 Ω 1206 (3216M) Thick Film ±1% 0.25W 100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 123-7028
Mfr. Part No.CPF0402B105KE1
kr 1,411
Each (On a Reel of 1000)
Units
105 kΩ 0402 (1005M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 134-5472
Mfr. Part No.CRG0805F680R
kr 0,098
Each (On a Reel of 5000)
Units
680 Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 223-0405
Mfr. Part No.CRG0805F680R
kr 0,271
Each (In a Pack of 50)
Units
680 Ω 0805 Thick Film ±1% 0.125W ±100ppm/°C - 2 x 0.5mm 2mm 1.25mm 0.5mm CRG -55°C +125°C
RS Stock No. 122-6341
Mfr. Part No.CPF0402B105KE1
kr 2,637
Each (In a Bag of 20)
Units
105 kΩ 0402 (1005M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 122-6392
Mfr. Part No.CPF0402B210KE1
kr 3,48
Each (In a Bag of 20)
Units
210 kΩ 0402 (1005M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 123-7079
Mfr. Part No.CPF0402B210KE1
kr 1,466
Each (On a Reel of 1000)
Units
210 kΩ 0402 (1005M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 134-5428
Mfr. Part No.CRG0603ZR
kr 0,016
Each (On a Reel of 5000)
Units
0 Ω 0603 (1608M) Thick Film ±0% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 123-9155
Mfr. Part No.CPF0603B191RE1
kr 1,337
Each (On a Reel of 1000)
Units
191 Ω 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 125-1192
Mfr. Part No.CRG1206F10K
kr 0,123
Each (In a Bag of 100)
Units
10 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5524
Mfr. Part No.CRG1206F10K
kr 0,098
Each (On a Reel of 5000)
Units
10 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 122-9042
Mfr. Part No.CPF0603B191RE1
kr 2,807
Each (In a Bag of 20)
Units
191 Ω 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 755-1287
Mfr. Part No.35212K2FT
kr 4,596
Each (In a Pack of 10)
Units
2.2 kΩ 2512 (6432M) Thick Film ±1% 2W ±100ppm/°C - - - - - 3521 -55°C +155°C
RS Stock No. 125-1171
Mfr. Part No.CRG0603ZR
kr 0,524
Each (In a Bag of 100)
Units
0 Ω 0603 (1608M) Thick Film ±0% 0.1W - - - - - - CRG -55°C +125°C
RS Stock No. 164-4830
Mfr. Part No.35212K2FT
kr 1,27
Each (On a Reel of 4000)
Units
2.2 kΩ 2512 (6432M) Thick Film ±1% 2W ±100ppm/°C - - - - - 3521 -55°C +155°C
RS Stock No. 134-5485
Mfr. Part No.CRG0805F10K
kr 0,034
Each (On a Reel of 5000)
Units
10 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5429
Mfr. Part No.CRG0603F10R
kr 0,032
Each (On a Reel of 5000)
Units
10 Ω 0603 (1608M) Thick Film ±1% 0.1W ±200ppm/°C - - - - - CRG -55°C +125°C