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. 901-3522
Mfr. Part No.MCR03EZPFX49R9
BrandROHM
SGD0.098
Each (In a Bag of 100)
units
49.9 Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3507
Mfr. Part No.MCR03EZPJ000
BrandROHM
SGD0.032
Each (In a Bag of 100)
units
0 Ω 0603 (1608M) Thick Film ±5% 0.1W - - - - - - MCR -55°C +155°C
RS Stock No. 901-3608
Mfr. Part No.MCR03EZPFX1502
BrandROHM
SGD0.047
Each (In a Bag of 100)
units
15 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3733
Mfr. Part No.MCR18EZPF1002
BrandROHM
SGD0.092
Each (In a Bag of 100)
units
10 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3588
Mfr. Part No.MCR03EZPFX3301
BrandROHM
SGD0.075
Each (In a Bag of 100)
units
3.3 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3664
Mfr. Part No.MCR10EZPJ000
BrandROHM
SGD0.021
Each (In a Bag of 100)
units
0 Ω 0805 (2012M) Thick Film ±5% 0.125W - - - - - - MCR -55°C +155°C
RS Stock No. 901-3395
Mfr. Part No.MCR01MZPF4990
BrandROHM
SGD0.058
Each (In a Bag of 100)
units
499 Ω 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3777
Mfr. Part No.MCR25JZHF3900
BrandROHM
SGD0.148
Each (In a Bag of 50)
units
390 Ω 1210 (3225M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3682
Mfr. Part No.MCR10EZPF1001
BrandROHM
SGD0.031
Each (In a Bag of 100)
units
1 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3737
Mfr. Part No.MCR18EZPF4702
BrandROHM
SGD0.053
Each (In a Bag of 100)
units
47 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3698
Mfr. Part No.MCR10EZPF4701
BrandROHM
SGD0.024
Each (In a Bag of 100)
units
4.7 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3743
Mfr. Part No.MCR25JZHJ000
BrandROHM
SGD0.074
Each (In a Bag of 50)
units
0 Ω 1210 (3225M) Thick Film ±5% 0.5W - - - - - - MCR -55°C +155°C
RS Stock No. 901-3421
Mfr. Part No.MCR01MZPF2701
BrandROHM
SGD0.074
Each (In a Bag of 100)
units
2.7 kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3519
Mfr. Part No.MCR03EZPFX33R0
BrandROHM
SGD0.075
Each (In a Bag of 100)
units
33 Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3377
Mfr. Part No.MCR01MZPF2000
BrandROHM
SGD0.098
Each (In a Bag of 100)
units
200 Ω 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3579
Mfr. Part No.MCR03EZPFX3001
BrandROHM
SGD0.075
Each (In a Bag of 100)
units
3 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3642
Mfr. Part No.MCR03EZPFX2003
BrandROHM
SGD0.074
Each (In a Bag of 100)
units
200 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3437
Mfr. Part No.MCR01MZPF4701
BrandROHM
SGD0.075
Each (In a Bag of 100)
units
4.7 kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 901-3345
Mfr. Part No.MCR006YZPF1002
BrandROHM
SGD0.061
Each (In a Bag of 200)
units
10 kΩ 0201 (0603M) Thick Film ±1% 0.05W ±250ppm/°C - - - - - MCR -55°C +125°C
RS Stock No. 901-3585
Mfr. Part No.MCR03EZPFX4991
BrandROHM
SGD0.059
Each (In a Bag of 100)
units
4.99 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - MCR -55°C +155°C