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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RS庫存編號 869-6038
製造零件編號CHV2010-JW-104ELF
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100 kΩ 2010 (5025M) Thick Film ±5% 0.5W ±200ppm/°C - - - - - CHV -55°C +155°C
RS庫存編號 720-3215
製造零件編號CRM2512-FX-R100ELF
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100 mΩ 2512 (6432M) Thick Film ±1% 2W ±100ppm/°C - - - - - CRM -55°C +155°C
RS庫存編號 167-4485
製造零件編號CRM2512-FX-R100ELF
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100 mΩ 2512 (6432M) Thick Film ±1% 2W ±100ppm/°C - - - - - CRM -55°C +155°C
RS庫存編號 166-9977
製造零件編號CHV2010-JW-104ELF
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100 kΩ 2010 (5025M) Thick Film ±5% 0.5W ±200ppm/°C - - - - - CHV -55°C +155°C
RS庫存編號 720-3240
製造零件編號CRM2512-JW-4R7ELF
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4.7 Ω 2512 (6432M) Thick Film ±5% 2W ±200ppm/°C - - - - - CRM -55°C +155°C
RS庫存編號 167-4491
製造零件編號CRM2512-JW-4R7ELF
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4.7 Ω 2512 (6432M) Thick Film ±5% 2W ±200ppm/°C - - - - - CRM -55°C +155°C
RS庫存編號 824-0329
製造零件編號CRE2512-FZ-R008E-2
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8 mΩ 2512 (6432M) Metal Strip ±1% 2W ±75ppm/°C AEC-Q200 - - - - CRE -55°C +170°C
RS庫存編號 166-9917
製造零件編號CRE2512-FZ-R008E-2
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8 mΩ 2512 (6432M) Metal Strip ±1% 2W ±75ppm/°C AEC-Q200 - - - - CRE -55°C +170°C
RS庫存編號 161-6935
製造零件編號CR0805-JW-104ELF
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100 kΩ 0805 (2012M) Thick Film ±5% 0.125W ±200ppm/°C - - - - - CR0805 -55°C +155°C
RS庫存編號 740-9075
製造零件編號CR0805-JW-104ELF
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100 kΩ 0805 (2012M) Thick Film ±5% 0.125W ±200ppm/°C - - - - - CR0805 -55°C +155°C
RS庫存編號 167-4477
製造零件編號CRA2512-FZ-R020ELF
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20 mΩ 2512 (6432M) - ±1% 3W ±75ppm/°C AEC-Q200 - - - - CRA -55°C +170°C
RS庫存編號 167-4478
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80 mΩ 2512 (6432M) - ±1% 3W ±75ppm/°C AEC-Q200 - - - - CRA -55°C +170°C
RS庫存編號 693-4384
製造零件編號CRA2512-FZ-R020ELF
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20 mΩ 2512 (6432M) Metal Strip ±1% 3W ±75ppm/°C AEC-Q200 - - - - CRA -55°C +170°C
RS庫存編號 167-4785
製造零件編號CR0603-JW-102GLF
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1 kΩ 0603 (1608M) Thick Film ±5% 0.1W ±200ppm/°C - - - - - CR0603 -55°C +155°C
RS庫存編號 167-5182
製造零件編號CRF2512-FZ-R020ELF
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20 mΩ 2512 (6432M) Metal Strip ±1% 1W ±75ppm/°C AEC-Q200 - - - - CRF -55°C +170°C
RS庫存編號 693-4390
製造零件編號CRA2512-FZ-R080ELF
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80 mΩ 2512 (6432M) Metal Strip ±1% 3W ±75ppm/°C AEC-Q200 - - - - CRA -55°C +170°C
RS庫存編號 720-3177
製造零件編號CRA2512-FZ-R025ELF
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25 mΩ 2512 (6432M) Metal Strip ±1% 3W ±75ppm/°C AEC-Q200 - - - - CRA -55°C +170°C
RS庫存編號 167-4483
製造零件編號CRA2512-FZ-R025ELF
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25 mΩ 2512 (6432M) Metal Alloy ±1% 3W ±75ppm/°C AEC-Q200 - - - - CRA -55°C +170°C
RS庫存編號 740-8830
製造零件編號CR0603-FX-2002ELF
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20 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CR0603 -55°C +155°C
RS庫存編號 167-5140
製造零件編號CRL0603-FW-R270ELF
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270 mΩ 0603 (1608M) Thick Film ±1% 0.1W ±200ppm/°C - - - - - CRL -55°C +125°C