# 5V Omron G2RL Relay Driver ## Description 5 V Omron G2RL relay driver PCB using an MMBT2222A low-side transistor, input terminals, flyback diode, and screw-terminal relay output. ## Project Details - **Owner:** raincowboy - **Created:** 6/11/2026 - **Last Updated:** 6/11/2026 - **Visibility:** Public ## Key Components ### D1 — [1N4148W](https://www.flux.ai/lcsc/1n4148w~ah9z.md) - Role: Relay coil flyback clamp - Max Reverse Voltage: 100V - Package or Case Code: SOD-123_L2.8-W1.8-LS3.7-RD - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_1N4148W_C109203.html - Manufacturer Part Number: 1N4148W - Forward Voltage: 0.7V - LCSC Part Number: C109203 - Part Type: Switching Diode - JLCPCB Part Class: Extended Part - Diode Type: Switching Diode - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1811131721_Shikues-1N4148W_C109203.pdf - Manufacturer Name: SHIKUES(时科) **Pins:** - A [pin 2] - C [pin 1] ### J1 — [KF128-5.08-2P-AA](https://www.flux.ai/lcsc/kf128-5p08-2p-aa~0pbi.md) - Connector Type: Screw terminal - Connector Pitch: 5.08mm - Manufacturer Part Number: KF128-5.08-2P-AA - Role: 5 V power input - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2408211511_Cixi-Kefa-Elec-KF128-5-08-2P-AA_C474952.pdf - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF128-5-08-2P_C474952.html - Connector Gender: Female - Connector Rows: 1 - LCSC Part Number: C474952 - Part Type: Screw terminal - JLCPCB Part Class: Extended Part - Current Rating: 24A - Operating Temperature: -40℃~+105℃ - Package or Case Code: CONN-TH_P5.08_KF128-5.08-2P - Manufacturer Name: KEFA(科发) - Connector Positions: 2 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J2 — [KF128-5.08-2P-AA](https://www.flux.ai/lcsc/kf128-5p08-2p-aa~0pbi.md) - Connector Positions: 2 - Package or Case Code: CONN-TH_P5.08_KF128-5.08-2P - Manufacturer Name: KEFA(科发) - Operating Temperature: -40℃~+105℃ - Part Type: Screw terminal - Current Rating: 24A - JLCPCB Part Class: Extended Part - Connector Gender: Female - Connector Rows: 1 - LCSC Part Number: C474952 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2408211511_Cixi-Kefa-Elec-KF128-5-08-2P-AA_C474952.pdf - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF128-5-08-2P_C474952.html - Role: Logic control input - Manufacturer Part Number: KF128-5.08-2P-AA - Connector Type: Screw terminal - Connector Pitch: 5.08mm **Pins:** - 1 [pin 1] - 2 [pin 2] ### J3 — [KF128-5.08-3P-AA](https://www.flux.ai/lcsc/kf128-5p08-3p-aa~wbwy.md) - Manufacturer Part Number: KF128-5.08-3P-AA - Role: Relay switched contact output - Connector Rows: 1 - Voltage Rating: 250V - Part Type: Screw terminal - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF128-5-08-3P_C474953.html - Connector Pitch: 5.08mm - Package or Case Code: CONN-TH_3P-P5.08_KF128-5.08-3P - LCSC Part Number: C474953 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2408211511_Cixi-Kefa-Elec-KF128-5-08-3P-AA_C474953.pdf - Manufacturer Name: KEFA(科发) - Current Rating: 24A - JLCPCB Part Class: Extended Part - Operating Temperature: -40℃~+105℃ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### K1 — [G2RL-1A-E2-CV-HA DC5](https://www.flux.ai/lcsc/g2rl-1a-e2-cv-ha-dc5~q0eu.md) - Manufacturer Name: OMRON - LCSC Part Number: C1563105 - Manufacturer Part Number: G2RL-1A-E2-CV-HA DC5 - Part Type: Power Relays - Role: 5 V relay output - Package or Case Code: RELAY-TH_OMRON_G2RL-1A-E-HA-DCXX **Pins:** - 1 [pin 1] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 8 [pin 8] ### Q1 — [MMBT2222A](https://www.flux.ai/lcsc/mmbt2222a~j9gx.md) - Package or Case Code: SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR - Part Type: Bipolar Transistors - BJT - Product Info Url: https://lcsc.com/product-detail/Transistors-NPN-PNP_MMBT2222A_C171740.html - LCSC Part Number: C171740 - Manufacturer Name: SHIKUES(时科) - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1811061311_Shikues-MMBT2222A_C171740.pdf - Role: Low-side relay coil switch - Manufacturer Part Number: MMBT2222A **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/raincowboy/5v-omron-g2rl-relay-driver~bd](https://www.flux.ai/raincowboy/5v-omron-g2rl-relay-driver~bd).* --- *Generated from [https://www.flux.ai/raincowboy/5v-omron-g2rl-relay-driver~bd](https://www.flux.ai/raincowboy/5v-omron-g2rl-relay-driver~bd)*