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. 223-1981
Mfr. Part No.CRG1206ZR
TWD0.80
Each (In a Pack of 50)
units
0 Ω 1206 Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5500
Mfr. Part No.CRG1206ZR
TWD0.30
Each (On a Reel of 5000)
units
0 Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5445
Mfr. Part No.CRG0603F10K
TWD0.10
Each (On a Reel of 5000)
units
10 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 125-1173
Mfr. Part No.CRG0603F10K
TWD0.60
Each (In a Bag of 100)
units
10 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5502
Mfr. Part No.CRG1206F15R
TWD0.30
Each (On a Reel of 5000)
units
15 Ω 1206 (3216M) Thick Film ±1% 0.25W ±200ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 223-2013
Mfr. Part No.CRG1206F15R
TWD0.90
Each (In a Pack of 50)
units
15 Ω 1206 (3216M) Thick Film ±1% 0.25W ±200ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 213-2008
Mfr. Part No.CRG0603F10R
TWD0.80
Each (In a Pack of 50)
units
10 Ω 0603 (1608M) Thick Film ±1% 0.1W ±200ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 123-9301
Mfr. Part No.CPF0603B21RE1
TWD5.50
Each (On a Reel of 1000)
units
21 Ω 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 134-5429
Mfr. Part No.CRG0603F10R
TWD0.10
Each (On a Reel of 5000)
units
10 Ω 0603 (1608M) Thick Film ±1% 0.1W ±200ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 122-9085
Mfr. Part No.CPF0603B21RE1
TWD9.00
Each (In a Bag of 20)
units
21 Ω 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 647-6166
Mfr. Part No.SMW310RJT
TWD21.20
Each (In a Pack of 5)
units
10 Ω - Wire Wound ±5% 3W ±200ppm/°C - - - - - SM -55°C +200°C
RS Stock No. 161-6300
Mfr. Part No.SMW310RJT
TWD5.60
Each (On a Reel of 1000)
units
10 Ω - Wire Wound ±5% 3W ±200ppm/°C - - - - - SM -55°C +200°C
RS Stock No. 224-0575
Mfr. Part No.35201M0JT
TWD4.00
Each (In a Pack of 10)
units
1 MΩ 2512 (6432M) Thick Film ±5% 1W ±200ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 163-8714
Mfr. Part No.35201M0JT
TWD2.00
Each (On a Reel of 4000)
units
1 MΩ 2512 (6432M) Thick Film ±5% 1W ±200ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 122-8752
Mfr. Part No.CPF0603B24R9E1
TWD9.00
Each (In a Bag of 20)
units
24.9 Ω 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 134-5495
Mfr. Part No.CRG0805F100K
TWD0.30
Each (On a Reel of 5000)
units
100 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 294-5062
Mfr. Part No.RH73H2A100MKTN
TWD24.60
Each (In a Pack of 5)
units
100 MΩ 0805 (2012M) Thick Film ±10% 0.125W ±100ppm/°C - - - - - RH73 -55°C +125°C
RS Stock No. 223-2417
Mfr. Part No.CRG1206F15K
TWD1.70
Each (In a Pack of 50)
units
15 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 213-2266
Mfr. Part No.CRG0603F1K0
TWD0.40
Each (In a Pack of 50)
units
1 kΩ 0603 Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 223-0691
Mfr. Part No.CRG0805F100K
TWD0.20
Each (In a Pack of 50)
units
100 kΩ 0805 Thick Film ±1% 0.125W ±100ppm/°C - 2 x 0.5mm 2mm 1.25mm 0.5mm CRG -55°C +125°C