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. 188-0606
Mfr. Part No.WFMB2512R4700FEA
BrandVishay
kr 8,523
Each (On a Reel of 2000)
Units
0.47 Ω 2512 (6432M) - ±1% 3W ±50ppm/°C AEC-Q200 - - - - WFM -65°C +170°C
RS Stock No. 176-4548
Mfr. Part No.CRGP2010F56R
kr 0,384
Each (On a Reel of 500)
Units
56 Ω 2010 (5025M) Thick Film ±1% 1.25W ±100ppm/°C - - - - - CRGP -55°C +155°C
RS Stock No. 814-0550
Mfr. Part No.ERJ6ENF1023V
BrandPanasonic
kr 0,195
Each (In a Bag of 100)
Units
102 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C AEC-Q200 - - - - ERJ6EN -55°C +155°C
RS Stock No. 180-3831
Mfr. Part No.MMU01020C2209FB300
BrandVishay
kr 0,663
Each (On a Reel of 500)
Units
22 Ω Melf 0102 Thin Film ±1% 0.2W ±50ppm/K AEC-Q200 - - - - MMU -55°C +125°C
RS Stock No. 180-4391
Mfr. Part No.MMB02070C2209FB200
BrandVishay
kr 1,326
Each (On a Reel of 500)
Units
22 Ω Melf 0207 Thin Film ±1% 0.4W ±50ppm/K AEC-Q200 - - - - MMB -55°C +125°C
RS Stock No. 802-9740
BrandRS PRO
kr 0,025
Each (On a Reel of 5000)
Units
36 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 114-2813
Mfr. Part No.ERJ6ENF2491V
BrandPanasonic
kr 0,071
Each (On a Reel of 5000)
Units
2.49 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C AEC-Q200 - - - - ERJ -55°C +155°C
RS Stock No. 122-8989
Mfr. Part No.CPF0603B13K7E1
kr 0,779
Each (In a Bag of 20)
Units
13.7 kΩ 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 717-5435
BrandRS PRO
kr 0,026
Each (On a Reel of 5000)
Units
249 Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 187-0263
Mfr. Part No.3560560KJT
kr 6,30
Each (On a Reel of 1000)
Units
560 kΩ 4257 (11070M Thick Film ±5% 6W ±100ppm/°C - - - - - 3560 -55°C +155°C
RS Stock No. 168-8429
Mfr. Part No.CRCW04023K01FKED
BrandVishay
kr 0,039
Each (On a Reel of 10000)
Units
3.01 kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 178-6255
Mfr. Part No.SG73G2BTTD47R0D
BrandKOA
kr 1,345
Each (On a Reel of 5000)
Units
47 Ω 1206 (3216M) Thick Film ±0.5% 0.5W ±50ppm/°C AEC-Q200 - - - - SG73G -55°C +155°C
RS Stock No. 176-3518
Mfr. Part No.ERJ3EKF6813V
BrandPanasonic
kr 0,091
Each (On a Reel of 1000)
Units
681 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C AEC-Q200 - - - - ERJ -55°C +155°C
RS Stock No. 812-1607
Mfr. Part No.CRCW04021M00FKEDHP
BrandVishay
kr 0,237
Each (In a Bag of 100)
Units
1 MΩ 0402 (1005M) Thick Film ±1% 0.2W ±100ppm/K - - - - - CRCW -55°C +155°C
RS Stock No. 770-8776
Mfr. Part No.ERJP6WF3603V
BrandPanasonic
kr 1,612
Each (In a Pack of 100)
Units
360 kΩ 0805 (2012M) Thick Film ±1% 0.5W ±200ppm/°C AEC-Q200 - - - - ERJP6W -55°C +155°C
RS Stock No. 182-4414
Mfr. Part No.SMA-A0102FTDL39R
kr 0,69
Each (On a Reel of 3000)
Units
39 Ω Melf 0102 Thin Film ±1% 0.3W ±50ppm/°C AEC-Q200 - - - - SMA-A -55°C +155°C
RS Stock No. 802-9469
BrandRS PRO
kr 0,019
Each (On a Reel of 5000)
Units
12 Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 904-8556
Mfr. Part No.ERA6ARB1651V
BrandPanasonic
kr 1,231
Each (In a Bag of 100)
Units
1.65 kΩ 0805 (2012M) Metal Film ±0.1% 0.125W ±10ppm/°C AEC-Q200 - - - - ERA -55°C +155°C
RS Stock No. 180-9804
Mfr. Part No.ERA3AEB4990V
BrandPanasonic
kr 0,883
Each (On a Reel of 500)
Units
- - - - - - - - - - - - - -
New
RS Stock No. 198-7693
Mfr. Part No.RC0402FR-0720KL
BrandYageo
kr 0,038
Each (On a Reel of 10000)
Units
20 kΩ 0204 (1005M) Thick Film 1% 0.0625W - - - - - - - - -
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