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. 804-6470
BrandRS PRO
PHP0.154
Each (On a Reel of 5000)
units
1.8kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 802-9551
BrandRS PRO
PHP0.243
Each (On a Reel of 5000)
units
220Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 713-6929
BrandRS PRO
PHP0.109
Each (On a Reel of 5000)
units
680Ω 0805 (2012M) Thick Film ±5% 0.125W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 713-1164
BrandRS PRO
PHP0.095
Each (On a Reel of 5000)
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1.8Ω 1206 (3216M) Thick Film ±5% 0.25W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-6400
BrandRS PRO
PHP0.388
Each (On a Reel of 5000)
units
402kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 804-6408
BrandRS PRO
PHP0.135
Each (On a Reel of 5000)
units
270Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 717-3212
BrandRS PRO
PHP0.189
Each (On a Reel of 5000)
units
249kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-5606
BrandRS PRO
PHP0.149
Each (On a Reel of 5000)
units
845Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-1386
BrandRS PRO
PHP0.301
Each (On a Reel of 5000)
units
255kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 804-8748
BrandRS PRO
PHP0.087
Each (On a Reel of 5000)
units
47Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 804-8814
BrandRS PRO
PHP0.07
Each (On a Reel of 5000)
units
360Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 804-6528
BrandRS PRO
PHP0.152
Each (On a Reel of 5000)
units
10kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 802-9692
BrandRS PRO
PHP0.243
Each (On a Reel of 5000)
units
10kΩ 1206 (1608M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 717-6123
BrandRS PRO
PHP0.189
Each (On a Reel of 5000)
units
47.5kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 169-0295
BrandRS PRO
PHP1.04
Each (On a Reel of 3000)
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110Ω Melf 0204 Thin Film ±1% 0.4W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 169-1670
BrandRS PRO
PHP3.283
Each (On a Reel of 1000)
units
680Ω Melf 0102 Thin Film ±1% 0.2W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 169-1674
BrandRS PRO
PHP3.283
Each (On a Reel of 1000)
units
1.5kΩ Melf 0102 Thin Film ±1% 0.2W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 717-5255
BrandRS PRO
PHP0.189
Each (On a Reel of 5000)
units
59Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 804-8757
BrandRS PRO
PHP0.089
Each (On a Reel of 5000)
units
75Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 802-9813
BrandRS PRO
PHP0.158
Each (On a Reel of 5000)
units
240kΩ 0603 (1608M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
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