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 (PCB’s).


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. 802-9712
BrandRS PRO
MYR0.02
Each (On a Reel of 5000)
units
15kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 804-7316
BrandRS PRO
MYR0.004
Each (On a Reel of 10000)
units
240kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 713-1356
BrandRS PRO
MYR0.011
Each (On a Reel of 5000)
units
390Ω 1206 (3216M) Thick Film ±5% 0.25W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 802-9576
BrandRS PRO
MYR0.018
Each (On a Reel of 5000)
units
270Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 183-9537
BrandRS PRO
MYR0.004
Each (On a Reel of 10000)
units
301Ω 0402 (1005M) Thick Film ±1% 0.063W ±200ppm/°C - - - - - CR -55°C +155°C
RS Stock No. 169-0370
BrandRS PRO
MYR0.089
Each (On a Reel of 2000)
units
1.5kΩ Melf 0207 Thin Film ±1% 0.5W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 804-8704
BrandRS PRO
MYR0.006
Each (On a Reel of 5000)
units
16Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 146-9526
BrandRS PRO
MYR17.438
Each (In a Pack of 5)
units
- Wire Wound ±5% 3W ±90ppm/°C - - - - - RSPSW -55°C +150°C
RS Stock No. 183-9550
BrandRS PRO
MYR0.004
Each (On a Reel of 10000)
units
49.9Ω 0402 (1005M) Thick Film ±1% 0.063W ±200ppm/°C - - - - - CR -55°C +155°C
RS Stock No. 713-4090
BrandRS PRO
MYR0.005
Each (On a Reel of 5000)
units
56Ω 0603 (1608M) Thick Film ±5% 0.1W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 713-6737
BrandRS PRO
MYR48.39
1 Reel of 5000
Reel(s)
3.3Ω 0805 (2012M) Thick Film ±5% 0.125W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-1865
BrandRS PRO
MYR0.02
Each (On a Reel of 5000)
units
7.87Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-5984
BrandRS PRO
MYR0.039
Each (On a Reel of 5000)
units
16.9kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-1398
BrandRS PRO
MYR0.033
Each (On a Reel of 5000)
units
267kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 804-8965
BrandRS PRO
MYR0.008
Each (On a Reel of 5000)
units
30kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 183-9671
BrandRS PRO
MYR0.185
Each (On a Reel of 1000)
units
- - Thick Film ±5% - - - - - - - - - -
RS Stock No. 804-8892
BrandRS PRO
MYR0.008
Each (On a Reel of 5000)
units
4.3kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 713-1283
BrandRS PRO
MYR0.019
Each (On a Reel of 5000)
units
51Ω 1206 (3216M) Thick Film ±5% 0.25W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 183-9631
BrandRS PRO
MYR0.122
Each (On a Reel of 4000)
units
4.7kΩ 2512 (6432M) Thick Film ±5% 1W ±100ppm/°C - - - - - CR -55°C +155°C
RS Stock No. 716-8330
BrandRS PRO
MYR0.021
Each (On a Reel of 10000)
units
22.1Ω 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - RS -55°C +155°C