The **YB225CWCKW01-5F-JB** is a specific part number for a high-quality, illuminated pushbutton switch manufactured by **NKK Switches**. This component belongs to the YB2 series, known for being panel-sealed and having a low profile. ### 1. Part Number Breakdown Understanding the alphanumeric code reveals the specific electronic and physical characteristics: | Code | Category | Description | | :--- | :--- | :--- | | **YB2** | Series | YB2 Series (Panel Seal, Low Profile) | | **25** | Circuit | DPDT (Double Pole Double Throw) | | **CW** | Mounting | Bushing Mount (IP65 Panel Sealed) | | **CK** | Action | Maintained (Push-ON, Push-OFF) | | **W01** | Contact Rating | Silver Contacts (5A @ 125/250V AC) | | **5F** | Illumination | Green LED (Requires Resistor) | | **JB** | Cap Color | Clear Lens with White Insert | --- ### 2. Technical Specifications This switch is designed for industrial and commercial interfaces where durability and moisture resistance are required. #### Electrical Specifications * **Current/Voltage Rating:** 5A @ 125V AC; 5A @ 250V AC; 3A @ 30V DC. * **Contact Resistance:** 50 milliohms maximum. * **Insulation Resistance:** 200 megohms minimum @ 500V DC. * **Dielectric Strength:** 1,000V AC minimum between contacts for 1 minute. #### LED Characteristics (The "5F" Green LED) The LED is a discrete component within the switch housing. Note that it typically requires an external current-limiting resistor if your supply voltage exceeds the LED's forward voltage. * **Forward Voltage ($V_f$):** ~2.1V typical. * **Forward Current ($I_f$):** 20mA. --- ### 3. Physical & Mechanical Properties * **Actuation Type:** Alternate Action (Latching). You press once to engage the circuit, and press again to release. * **Sealing:** Rated **IP65** (Dust-tight and protected against water jets), making it suitable for environments where spills or splashes occur. * **Panel Cutout:** 22mm diameter. * **Terminals:** Solder lug / Quick connect terminals. --- ### 4. Circuit Diagram (DPDT) A DPDT (Double Pole Double Throw) configuration means the switch controls two separate circuits simultaneously, each with a "normally open" (NO) and "normally closed" (NC) contact. ```text Circuit 1 Circuit 2 [NC1] [NO1] [C1] [NC2] [NO2] [C2] | | (Switching) (Switching) ```