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. 717-0777
BrandRS PRO
MYR0.015
Each (On a Reel of 5000)
units
2.32kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-3221
BrandRS PRO
MYR0.009
Each (On a Reel of 5000)
units
274kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 169-0301
BrandRS PRO
MYR0.09
Each (On a Reel of 3000)
units
470Ω Melf 0204 Thin Film ±1% 0.4W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 717-5631
BrandRS PRO
MYR0.016
Each (On a Reel of 5000)
units
1.15kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 716-9294
BrandRS PRO
MYR0.011
Each (On a Reel of 10000)
units
32.4kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 183-9980
BrandRS PRO
MYR0.311
Each (On a Reel of 1000)
units
- - Thick Film ±5% - - - - - - - - - -
RS Stock No. 713-1413
BrandRS PRO
MYR0.042
Each (On a Reel of 5000)
units
2.2kΩ 1206 (3216M) Thick Film ±5% 0.25W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 183-9548
BrandRS PRO
MYR0.004
Each (On a Reel of 10000)
units
499Ω 0402 (1005M) Thick Film ±1% 16W ±200ppm/°C - - - - - CR -55°C +155°C
RS Stock No. 169-1738
BrandRS PRO
MYR0.124
Each (On a Reel of 1000)
units
56Ω Melf 0204 Thin Film ±1% 0.4W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 802-9680
BrandRS PRO
MYR0.016
Each (On a Reel of 5000)
units
7.5kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 804-7136
BrandRS PRO
MYR0.006
Each (On a Reel of 10000)
units
620Ω 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 183-9624
BrandRS PRO
MYR0.122
Each (On a Reel of 4000)
units
330Ω 2512 (6432M) Thick Film ±5% 1W ±100ppm/°C - - - - - CR -55°C +155°C
RS Stock No. 717-0490
BrandRS PRO
MYR0.006
Each (On a Reel of 5000)
units
280Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 716-8428
BrandRS PRO
MYR0.004
Each (On a Reel of 10000)
units
40.2Ω 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 713-7099
BrandRS PRO
MYR0.024
Each (On a Reel of 5000)
units
100kΩ 0805 (2012M) Thick Film ±5% 0.125W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-0500
BrandRS PRO
MYR0.006
Each (On a Reel of 5000)
units
287Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 804-6467
BrandRS PRO
MYR0.012
Each (On a Reel of 5000)
units
2kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-3231
BrandRS PRO
MYR0.01
Each (On a Reel of 5000)
units
301kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-6139
BrandRS PRO
MYR0.014
Each (On a Reel of 5000)
units
51.1kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 169-1744
BrandRS PRO
MYR0.124
Each (On a Reel of 1000)
units
120Ω Melf 0204 Thin Film ±1% 0.4W - AEC-Q200 Qualified - - - - - -55°C +155°C