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 - Some common package sizes are 0201,0402,0603,0805,1206,1210,2020,2512


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 critica

  • 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. 179-1456
Mfr. Part No.RS73F1JTTD3903B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
390kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1501
Mfr. Part No.RS73F1JTTD4700B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
470Ω 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1479
Mfr. Part No.RS73F1JTTD6803B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
680kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1444
Mfr. Part No.RS73F1JTTD4702B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
47kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-0383
Mfr. Part No.RS73F1JTTD5601B
BrandKOA
£0.029
Each (On a Reel of 5000)
Units
5.6kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-0396
Mfr. Part No.RS73F1JTTD4702B
BrandKOA
£0.029
Each (On a Reel of 5000)
Units
47kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1528
Mfr. Part No.RS73F1JTTD3901B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
3.9kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1468
Mfr. Part No.RS73F1JTTD2200B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
220Ω 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1476
Mfr. Part No.RS73F1JTTD2700B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
270Ω 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1434
Mfr. Part No.RS73F1JTTD5601B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
5.6kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1480
Mfr. Part No.RS73F1JTTD1003B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
100kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1458
Mfr. Part No.RS73F1JTTD1800B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
180Ω 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-0384
Mfr. Part No.RS73F1JTTD6801B
BrandKOA
£0.029
Each (On a Reel of 5000)
Units
6.8kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1496
Mfr. Part No.RS73F1JTTD1503B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
150kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-0397
Mfr. Part No.RS73F1JTTD5602B
BrandKOA
£0.029
Each (On a Reel of 5000)
Units
56kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-0360
Mfr. Part No.RS73F1JTTD1000B
BrandKOA
£0.029
Each (On a Reel of 5000)
Units
100Ω 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1449
Mfr. Part No.RS73F1JTTD1500B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
150Ω 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-0402
Mfr. Part No.RS73F1JTTD1203B
BrandKOA
£0.029
Each (On a Reel of 5000)
Units
120kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1459
Mfr. Part No.RS73F1JTTD1002B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
10kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C
RS Stock No. 179-1446
Mfr. Part No.RS73F1JTTD3303B
BrandKOA
£0.047
Each (On a Reel of 500)
Units
330kΩ 0603 (1608M) Thick Film ±0.1% 0.2W ±25ppm/°C AEC-Q200 - - - - RS73 -55°C +155°C