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. 804-9028
BrandRS PRO
MYR0.006
Each (On a Reel of 5000)
units
180kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 169-1710
BrandRS PRO
MYR0.172
Each (On a Reel of 500)
units
120kΩ Melf 0207 Thin Film ±1% 0.5W - AEC-Q200 Qualified - - - - - -55°C +155°C
New
RS Stock No. 184-0007
BrandRS PRO
MYR0.308
Each (On a Reel of 1000)
units
- - Thick Film ±5% - - - - - - - - - -
RS Stock No. 716-7747
BrandRS PRO
MYR0.021
Each (On a Reel of 15000)
units
6.8kΩ 0201 (0603M) Thick Film ±1% 0.05W ±200ppm/°C - - - - - RS -55°C +125°C
RS Stock No. 169-1715
BrandRS PRO
MYR0.181
Each (On a Reel of 1000)
units
2.2Ω Melf 0204 Thin Film ±1% 0.4W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 804-8937
BrandRS PRO
MYR0.006
Each (On a Reel of 5000)
units
11kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 169-0259
BrandRS PRO
MYR0.193
Each (On a Reel of 3000)
units
100kΩ Melf 0102 Thin Film ±1% 0.2W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 717-2616
BrandRS PRO
MYR0.017
Each (On a Reel of 5000)
units
2.55kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 716-8633
BrandRS PRO
MYR0.009
Each (On a Reel of 10000)
units
221Ω 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 804-8889
BrandRS PRO
MYR0.007
Each (On a Reel of 5000)
units
3kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 804-7108
BrandRS PRO
MYR0.004
Each (On a Reel of 10000)
units
240Ω 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 713-6875
BrandRS PRO
MYR0.01
Each (On a Reel of 5000)
units
150Ω 0805 (2012M) Thick Film ±5% 0.125W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 716-9288
BrandRS PRO
MYR0.014
Each (On a Reel of 10000)
units
30.1kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 169-0267
BrandRS PRO
MYR0.193
Each (On a Reel of 3000)
units
470kΩ Melf 0102 Thin Film ±1% 0.2W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 716-9572
BrandRS PRO
MYR0.014
Each (On a Reel of 10000)
units
274kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 169-0239
BrandRS PRO
MYR0.193
Each (On a Reel of 3000)
units
680Ω Melf 0102 Thin Film ±1% 0.2W - AEC-Q200 Qualified - - - - - -55°C +155°C
New
RS Stock No. 183-9997
BrandRS PRO
MYR0.308
Each (On a Reel of 1000)
units
- - Thick Film ±5% - - - - - - - - - -
RS Stock No. 169-0219
BrandRS PRO
MYR0.115
Each (On a Reel of 3000)
units
10Ω Melf 0102 Thin Film ±1% 0.2W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 716-9604
BrandRS PRO
MYR0.011
Each (On a Reel of 10000)
units
348kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 169-1665
BrandRS PRO
MYR0.263
Each (On a Reel of 1000)
units
200Ω Melf 0102 Thin Film ±1% 0.2W - AEC-Q200 Qualified - - - - - -55°C +155°C
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