LEDs on Metal-Core PCB


High-Power LEDs on Metal Core PCB

  • UV, Visible, and NIR Models Available
  • High-Power LED Mounted on Meal-Core printed Circuit Board
  • Ideal for OEM Applications


  • Wavelengths Ranging from 365 nm to 1050 nm
  • High-Power Outputs Ranging from 35 mW to 900 mW
  • Warm White, Cold White, and Broadband LEDs Also Available
  • LED Mounted on Metal-Core Printed Circuit Board for Excellent Heat Management

Thorlabs' High-Power LEDs on Metal-Core Printed Circuit Boards (MCPCBs) are designed to provide high-power output in a compact package. Each LED consists of a single high-power LED with multiple emitters that has been soldered to an MCPCB.

Thorlabs uses high thermal conductivity MCPCB materials from Berquist and SinkPAD (see footnote c in the table to the right for the material used in each LED). The MCPCB is designed to provide good thermal management; however, the LED must still be mounted onto a heat sink using thermal paste to ensure proper operation and to maximize operating lifetime. Mounting holes are provided on the MCPCB surface for attaching the LED to a heat sink; the Ø2 mm through holes are compatible with #1 (M2) screws (not included). Therefore, these LEDs are ideal for OEM or custom applications.

Thorlabs also offers Mounted High-Power LEDs with an integrated heat sink, as well as Collimated Mounted LEDs, which are better suited for laboratory use where there are fewer space constraints. For fiber applications, we also offer Fiber-Coupled High-Power LEDs. 

Optimized Thermal Management
These high-power LEDs possess good thermal stability properties, and hence, degradation of optical output power due to increased LED temperature is not an issue when the LED is properly mounted to a heat sink using thermal paste or thermally conductive double-sided tape. For more details, please see the Stability tab.

Broadband LED Option
The MBB1D1 MCPCB-mounted LED has been designed to have relatively flat spectral emission over a wide wavelength range. It offers a 280 nm FWHM bandwidth, while the 10 dB bandwidth ranges between 470 nm and 850 nm. For more information on the spectrum of this broadband source, please see the table to the right.

These LEDs have been soldered to a metal core with low thermal resistance. While this feature allows for excellent thermal management, it can also prevent the metal pads from reaching the appropriate temperature for soldering when the package is connected to a heat sink. To properly solder wires to the pads, first make sure that the metal core is not in contact with a heat sink or a metal surface. We recommend using a small vice or similar device to hold the MCPCB during the soldering process and wires with a minimum gauge of 24 AWG (0.25 mm2).

To solder wires to the MCPCB, first hold the copper bit of the soldering iron on one of the pads for approximately 30 seconds using a soldering temperature of about 350 °C. The soldering iron will heat the entire metal core PCB, so do not touch LED package until it has cooled down after the soldering process. Test the temperature by touching tin solder to the pad: the solder will melt and flow evenly over the entire pad at the correct temperature. Coat the other pads with tin solder. Now, solder the wires to the pads. Use tweezers or pliers to remove the MCPCB from the vice and place it on a heat sink or metal surface. The metal core PCB will cool down in several seconds and is now ready for your application.

For convenient connection of the LEDs to the above drivers, please order the optional LED Connection Cable below.

Driver Options and Pin Assignments
Thorlabs offers four drivers: LEDD1B, DC2100, DC4100 and DC4104 (the latter two require the DC4100-HUB). See the Drivers tab for compatibility and driver features tab for a list of specifications. The LEDD1B is capable of providing LED modulation frequencies up to 5 kHz, while DC2100, DC4100, and DC4104 can modulate the LED at a rate up to 100 kHz. Please note that these LEDs are not compatible with the EEPROM feature of the DC2100, DC4100, and DC4104, which automatically adjusts for the current limits of our mounted LEDs. Therefore, care must be taken not to exceed the current limits of the LEDs offered on this page. To connect the PCB to a controller, please note that the connector labeled "+" is the Anode (+V), and the connector labeled "-" is the Cathode. The other two connectors ("IO" and "GND") do not need to be connected and are reserved for future use.



Item #Color
(Click for Spectrum)a
LED Power
Output (Min)a
M365D1 UV 365 nm 190 mW
M385D1 UV 385 nm 270 mW
M405D1 UV 405 nm 410 mW
M420D1 Violet 420 nm 250 mW
M455D2c Royal Blue 455 nm 900 mW
M470D2c Blue 470 nm 650 mW
M490D1 Blue 490 nm 200 mW
M505D2c Cyan 505 nm 400 mW
M530D2c Green 530 nm 350 mW
M565D1 Green Yellow 565 nm 100 mW
M590D2c Amber 590 nm 160 mW
M617D2c Orange 617 nm 600 mW
M625D2c Red 625 nm 700 mW
M660D1 Deep Red 660 nm 270 mW
M735D1 Far Red 735 nm 260 mW
M780D1 IR 780 nm 160 mW
M850D2c IR 850 nm 900 mW
M880D1 IR 880 nm 280 mW
M940D2c IR 940 nm 800 mW
M970D1 IR 970 nm 35 mW
M1050D1 IR 1050 nm 50 mW
MBB1D1d Broadband 470 - 850 nme 70 mW
MWWHD1f Warm White 3000 Kg 500 mW
MCWHD2c,f Cold White 6500 Kg 800 mW
  • Due to variations in the manufacturing process and operating parameters such as temperature and current, the actual spectral output of any given LED will vary. These values were measured with the back side of the PCB at 25 °C. Output plots and center wavelength specs are only intended to be used as a guideline.
  • The nominal wavelength indicates the wavelength at which the LED appears brightest to the human eye. This may not correspond to the peak wavelength as measured by a spectrograph.
  • These LEDs use a high thermal conductivity MCPCB material from SinkPAD, while the rest of the MCPCB LEDs use a high thermal conductivity MCPCB material from Berquist.
  • The MBB1D1 LED may not turn off completely when modulated at frequencies above 1 kHz with a duty cycle of 50%, as the broadband emission is produced by optically stimulating emission from phosphor. For modulation at frequencies above 1 kHz, the duty cycle may be reduced. For example, 10 kHz modulation is attainable with a duty cycle of 5%.
  • 10 dB Bandwidth.
  • The MWWHD1 and MCWHD2 LEDs may not turn off completely when modulated at frequencies above 5 kHz, as the white light is produced by optically stimulating emission from phosphor.
  • Correlated Color Temperature.


LED Connection Cable

  • 4-Pin M8 Connector on One Side
  • 4 Bare Wires on Other Side
  • 2 m Long, 24 AWG Wires

The 4-Pin M8 connection cable can be used to connect the high-power LEDs on metal core PCB to the following Thorlabs LED drivers: LEDD1B, DC2100, DC4100, and DC4104 (the latter two require the DC4100-HUB.

Pin Connection - Male
The diagram above shows the male connector for use with the above Thorlabs LED drivers. The connector is a standard M8 x 1 sensor circular connector. Pins 1 and 2 are the connection to the LED. Please note that the bare PCB board LEDs shown on this page do not include an EEPROM like our mounted high-power LEDs; hence pins 3 and 4 should not be connected. Also, note that the pin connection diagram shown here may not be valid for third-party LED drivers. We also offer a female 4-pin M8 connector cable.

PinSpecificationColor Pin Out
1 LED Anode Brown
2 LED Cathode White


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