Memory Sockets

Memory sockets are a part of printed circuit boards, designed for use in personal computers, servers and workstations. The module is mounted on the circuit board using a module socket. DIMMs are the dominant form of memory used in computing.


What are DIMMs?


DIMMs are memory modules that are composed of a series of dynamic, random-access memory (RAM) integrated circuits. They have two separate electrical contacts on either side and a 64-bit path.


Types of DIMM sockets


DIMM sockets have to conform to the needs of the system that they are used in. Different types of socket may vary according to the number of pins. This depends on the type of RAM being supported by the DIMM, from DDR to DDR4. Generally, the more pins or contacts, the higher the type of RAM supported. For example, a 240-pin DIMM might be used for DDR2 SDRAM, while a 288-pin DIM might be used for DDR4 SDRAM.


DIMM sockets can vary based on orientation this can be:



  • Angled

  • Horizontal

  • Vertical


What are SIMMs?


SIMM (Single In-Line Memory Module) sockets are computer memory expansion holders that connect memory modules to circuit boards. These sockets have single row pins which connect to the system board vertically or at predetermined angles. The sockets are easily inserted or extracted because they are not soldered onto the circuit board.


SIMM sockets have positive polarisation to prevent the memory modules from being inserted incorrectly. Contacts (pins) on the SIMM sockets have anti-overstress features and are resistant to high temperatures.


What are SIMM sockets used for?


The main benefits of using SIMM sockets are their space-saving capabilities and simple installation mechanisms, making them suitable for smaller circuit board designs used by electronic hobbyists. SIMM sockets are legacy components, mainly used in older module computers, PCBs and motherboards.


Types of SIMM sockets


SIMM sockets come in various sizes and are distinguished by the number of pin slots:



  • 30-pin SIMM sockets are shorter than standard sockets and can be used in legacy type laptops.

  • 64- and 72-pin SIMM sockets are used in desktop motherboards because they can hold larger memory modules.

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Description Price Gender Memory Socket Type Body Orientation Contact Material Contact Plating Number of Contacts Pitch Mounting Type Termination Method Housing Material SDRAM Type Latching Row Spacing Maximum Contact Resistance
RS Stock No. 161-5604
Mfr. Part No.440360-2
HK$38.209
Each (In a Tray of 600)
units
Female DIMM Socket Right Angle Phosphor Bronze Gold over Nickel 124 0.8mm Surface Mount Solder Thermoplastic - - - -
RS Stock No. 717-6684
Mfr. Part No.440360-2
HK$57.31
Each
units
Female DIMM Socket Right Angle Phosphor Bronze Gold over Nickel 124 0.8mm Surface Mount Solder Thermoplastic - - - -
RS Stock No. 542-2607
Mfr. Part No.390111-1
HK$47.28
Each
units
Female DIMM Socket Right Angle Phosphor Bronze Gold over Nickel 144 0.8mm Surface Mount Solder Nylon - - - -
RS Stock No. 186-4817
Mfr. Part No.1717254-4
HK$21.784
Each (On a Tape of 150)
units
Female DIMM Socket Right Angle Copper Alloy Gold Flash 200 0.6mm Surface Mount Solder Thermoplastic SO Yes 6.2mm 30.0mΩ
RS Stock No. 135-8525
Mfr. Part No.5822021-5
HK$45.78
Each (In a Box of 315)
units
Female SIMM Socket Straight Phosphor Bronze Tin over Nickel 80 2.54mm Through Hole Solder Liquid Crystal Polymer - - - -
RS Stock No. 164-4213
Mfr. Part No.5821997-3
HK$65.274
Each (In a Box of 315)
units
Female SIMM Socket Straight Phosphor Bronze Gold 72 1.27mm Through Hole Solder Liquid Crystal Polymer - Yes - -
RS Stock No. 185-5885
Mfr. Part No.2309413-1
HK$14.63
Each (On a Tape of 5)
units
Female DIMM Socket Right Angle Copper Alloy Gold Flash, Nickel Plated (Under Plated) 260 0.5mm Surface Mount Solder Thermoplastic SO Yes 8.2mm 50.0mΩ
RS Stock No. 164-0073
Mfr. Part No.5822021-4
HK$31.40
Each (In a Box of 315)
units
Female SIMM Socket Straight Phosphor Bronze Tin over Nickel 72 2.54mm Through Hole Solder Liquid Crystal Polymer - - - -
RS Stock No. 542-2657
Mfr. Part No.5390241-1
HK$44.67
Each
units
Female DIMM Socket Straight Phosphor Bronze Gold 184 2.54mm Through Hole Solder Nylon DDR - - -
RS Stock No. 191-7876
Mfr. Part No.1827236-4
HK$48.127
Each (In a Tray of 20)
units
Female DIMM Socket Right Angle Copper Alloy Gold Flash 200 0.6mm Surface Mount Solder Thermoplastic DDR2 Yes 5.6mm 30.0mΩ
RS Stock No. 185-5906
Mfr. Part No.2309412-1
HK$14.848
Each (On a Tape of 5)
units
Female DIMM Socket Right Angle Copper Alloy Gold Flash, Nickel Plated (Under Plated) 260 0.5mm Surface Mount Solder Thermoplastic SO Yes 8.2mm 50.0mΩ
RS Stock No. 164-4116
Mfr. Part No.3-390113-1
HK$41.135
Each (In a Box of 432)
units
Female DIMM Socket Right Angle Copper Alloy Gold over Nickel 144 0.8mm Surface Mount Solder Polymer SO - - -
RS Stock No. 718-4739
Mfr. Part No.5822021-5
HK$64.69
Each
units
Female SIMM Socket Straight Phosphor Bronze Tin over Nickel 80 2.54mm Through Hole Solder Liquid Crystal Polymer - - - -
RS Stock No. 186-4923
Mfr. Part No.1717254-1
HK$29.61
Each (On a Tape of 3)
units
Female DIMM Socket Right Angle Copper Alloy Gold Flash 200 0.6mm Surface Mount Solder Thermoplastic SO Yes 6.2mm 30.0mΩ
RS Stock No. 185-5875
Mfr. Part No.2309407-1
HK$11.22
Each (On a Tape of 5)
units
Female DIMM Socket Right Angle Copper Alloy Gold Flash, Nickel Plated (Under Plated) 260 0.5mm Surface Mount Solder Thermoplastic SO Yes 8.2mm 50.0mΩ
RS Stock No. 164-7720
Mfr. Part No.1612618-4
HK$28.937
Each (In a Tray of 20)
units
Female DIMM Socket Right Angle Copper Alloy Gold over Nickel 200 0.6mm Surface Mount Solder Thermoplastic - - - -
RS Stock No. 719-8725
Mfr. Part No.1473149-4
HK$29.15
Each
units
Female DIMM Socket Right Angle Copper Alloy Gold over Nickel 200 0.6mm Surface Mount Solder Thermoplastic DDR2 - - -
RS Stock No. 681-2307
Mfr. Part No.5822134-3
HK$52.43
Each
units
Female SIMM Socket - Phosphor Bronze Tin over Nickel 72 2.54mm Through Hole Solder Liquid Crystal Polymer - - - -
RS Stock No. 185-9262
Mfr. Part No.1565917-4
HK$23.10
Each (On a Reel of 150)
units
Female DIMM Socket Right Angle Copper Alloy Gold Flash 200 0.6mm Surface Mount - Thermoplastic DDR1, DDR2 Yes 6.2mm -
RS Stock No. 185-5879
Mfr. Part No.2309409-1
HK$11.486
Each (On a Tape of 5)
units
Female DIMM Socket Right Angle Copper Alloy Gold Flash, Nickel Plated (Under Plated) 260 0.5mm Surface Mount Solder Thermoplastic SO Yes 8.2mm 50.0mΩ