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. 181-0332
Mfr. Part No.SMV3W10MJT
Each (On a Reel of 100)
10MΩ - Metal Film ±5% 3W ±200ppm/°C - - - - - SMV -55°C +200°C
RS Stock No. 187-2936
Mfr. Part No.RQ73C2B49R9BTDF
Each (On a Tape of 25)
49.9Ω 1206 (3216M) Thin Film ±0.1% 0.4W ±10ppm/°C AEC-Q200 - - - - RQ73 -55°C +155°C
RS Stock No. 178-6341
Mfr. Part No.RN73H1JTTD82R0B25
Each (On a Reel of 5000)
82Ω 0603 (1608M) Thin Film ±0.1% 0.1W ±25ppm/°C AEC-Q200 - - - - RN73H +85°C +155°C
RS Stock No. 169-5068
Mfr. Part No.CRCW0805511RFKEA
Each (On a Reel of 5000)
511Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 865-4289
Mfr. Part No.ERJU06F15R0V
Each (In a Bag of 100)
15Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - ERJ -55°C +155°C
RS Stock No. 187-2952
Mfr. Part No.RQ73C2A6K49BTDF
Each (On a Tape of 25)
6.49kΩ 0805 (2012M) Thin Film ±0.1% 0.2W ±10ppm/°C AEC-Q200 - - - - RQ73 -55°C +155°C
RS Stock No. 679-2291
Mfr. Part No.CRCW12066K19FKEA
Each (In a Pack of 50)
6.19kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 812-6740
Mfr. Part No.ERJ1TYJ100U
Each (In a Bag of 100)
10Ω 2512 (6432M) Thick Film ±5% 1W ±200ppm/°C - - - - - ERJ1TY -55°C +155°C
RS Stock No. 182-4694
Mfr. Part No.SMA-A0102BTNL390R
Each (On a Reel of 250)
390Ω Melf 0102 Thin Film ±0.1% 0.3W ±15ppm/°C AEC-Q200 - - - - SMA-A -55°C +155°C
RS Stock No. 176-4930
Mfr. Part No.CRGP0805F120R
Each (On a Reel of 1000)
120Ω 0805 (2012M) Thick Film ±1% 0.33W ±100ppm/°C - - - - - GRGP -55°C +155°C
RS Stock No. 164-6132
Mfr. Part No.3522150KJT
Each (On a Reel of 2000)
150kΩ 2512 (6432M) Thick Film ±5% 3W - - - - - - 3522 -55°C +105°C
RS Stock No. 871-9291
Mfr. Part No.ERJ-2RKF3323X
Each (In a Pack of 50000)
332kΩ 0402 (1005M) Thick Film ±1% 0.1W ±100 ppm/°C - - - - - ERJ -55°C +155°C
RS Stock No. 122-8967
Mfr. Part No.CPF0603B11KE1
Each (In a Bag of 20)
11kΩ 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 810-1744
Mfr. Part No.ERJ6RBD2001V
Each (In a Bag of 100)
2kΩ 0805 (2012M) Thick Film ±0.5% 0.1W ±50ppm/°C AEC-Q200 - - - - ERJ -55°C +125°C
RS Stock No. 172-2122
Mfr. Part No.ACPP0805300RBE
Each (On a Reel of 5000)
300Ω 0805 (2012M) Thin Film ±0.1% 0.1W ±25ppm/°C - - - - - ACPP -55°C +125°C
RS Stock No. 134-6274
Mfr. Part No.RG1005P-683-B
BrandSusumu Co
Each (On a Reel of 5000)
68kΩ 0402 (1005M) Thin Film ±0.1% 0.125W ±25ppm/°C - - - - - RG -55°C +155°C
RS Stock No. 848-8697
Mfr. Part No.TNPW060347K0BEEA
Each (In a Pack of 5000)
47kΩ 0603 (1608M) Thin Film ±0.1% 0.1W ±25ppm/K - - - - - TNPW -55°C +125°C
RS Stock No. 812-3574
Mfr. Part No.CRCW08054K70FKEAHP
Each (In a Bag of 25)
4.7kΩ 0805 (2012M) Thick Film ±1% 0.5W ±100ppm/K - - - - - CRCW -55°C +155°C
RS Stock No. 181-7852
Mfr. Part No.CRCW06032K70FKEAHP
Each (On a Reel of 1000)
- - - - - - - - - - - - - -
RS Stock No. 683-6215
Mfr. Part No.WSLP1206R0500FEA
Each (In a Pack of 5)
50mΩ 1206 (3216M) Metal Strip ±1% 1W ±75ppm/°C - - - - - WSLP -65°C +170°C
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