2 layers90 × 50 mm
2 layers30 × 40.1 mm
REL1SW01
mlab-modules/REL1SW01Dual MOSFET or single Relay switching module.
- Size
- 30 × 40.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 18
- Pads
- 80
- Tracks, vias
- 70, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 20 Jun 2023
- Updated
- 9 Jul 2024
Overview
REL1SW01 is an open-source printed circuit board by mlab-modules, from the mlab-modules/REL1SW01 repository on GitHub. It is a 2-layer board of 30 × 40.1 mm with 22 parts on 18 nets, routed with 70 tracks and 0 vias.
It is built around the SS14 and IRLML6244. Its parts include 5 connectors, 4 resistors, 4 diodes, 2 capacitors and 1 crystal. It belongs with the home automation and IoT boards of this library.
Main components
2README
README.mdREL1SW01 - One Relay and/or Two N-MOSFET
Introduction
The REL1SW01 is a versatile module from the MLAB series designed for triggering high current demaining devices (eg. high power led, high voltage circuits, DC motors, ..) using two N-MOSFET transistors or relay. It supports both bistable and monostable relay configurations and can be integrated into various electronic projects requiring relay switching or direct MOSFET control.
Features
- Equipped with two N-MOSFET transistors (IRLML6244).
- Capable of switching voltages up to 20V.
- Supports optional relay addition (e.g., DPDT FRT5).
- Configurable for either relay coil driving or independent transistor switching.
- Compatible with MCU control.
Specifications
MOSFET Transistors (IRLML6244)
- Drain-Source Voltage (Vds): 20V
- Gate-Source Voltage (Vgs): ±12V
- Continuous Drain Current (Id): 6.3A
- Total Power Dissipation (Pd): 1.3W
- Gate Threshold Voltage (Vgs(th)): 1.1V
- On-State Resistance (Rds(on)): 21mΩ at Vgs = 4.5V
Usage
Without Relay
- Connect the load to the drain of the MOSFET.
- The source of the MOSFET should be connected to GND.
- Use the gate to control switching via the MCU.
With Relay
- Connect the relay's coil terminals to the MOSFETs as per the required configuration.
- The relay contacts will then be used to switch the external load.
Configuration
To configure the module for different uses:
- For direct MOSFET switching, connect the load between the drain and the positive supply (VCC).
- For relay operation, connect the relay coil to the designated pins controlled by the MOSFETs.
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | SROUB3M | Mlab_Mechanical:MountingHole_3mm | M1, M2, M3, M4 |
| 4 | SS14 | Diode_SMD:D_SMA | D1, D2, D3, D4 |
| 2 | 100R | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | 100k | Resistor_SMD:R_0805_2012Metric | R3, R4 |
| 2 | HEADER_2x02_PARALLEL | Mlab_Pin_Headers:Straight_2x02 | J1, J2 |
| 2 | HEADER_2x06_PARALLEL | Mlab_Pin_Headers:Straight_2x06 | J3, J4 |
| 2 | IRLML6244 | Package_TO_SOT_SMD:SOT-23 | T1, T2 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 47uF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | HEADER_2x04_PARALLEL | Mlab_Pin_Headers:Straight_2x04 | J5 |
| 1 | RELE | Relay_THT:Relay_DPDT_FRT5 | X1 |
Questions
How big is the REL1SW01 PCB?
It measures 30 × 40.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the REL1SW01 use?
22 parts, built around the SS14 and IRLML6244. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the REL1SW01 KiCad files?
From the mlab-modules/REL1SW01 repository on GitHub, at the commit this page was made from: the board is hw/sch_pcb/REL1SW01.kicad_pcb and its schematic hw/sch_pcb/REL1SW01.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the REL1SW01 design in my own project?
Its repository states no licence, so its author keeps all rights: ask mlab-modules before reusing the design.
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