The **UB226SKW035D-3JB** is a high-quality, illuminated pushbutton switch manufactured by **NKK Switches**. It belongs to the UB2 series, which is known for its low-profile design and customizable aesthetics. --- ### 1. Part Number Breakdown Understanding the specific electronics involves decoding the manufacturer's nomenclature: | Code Segment | Description | Details | | :--- | :--- | :--- | | **UB2** | Series Type | Low Profile Pushbutton | | **26** | Circuit Configuration | **DPDT** (Double Pole, Double Throw) | | **S** | Operation Type | Momentary (Spring Return) | | **K** | Mounting Type | Snap-in Mount (Square) | | **W** | Contact Material | Silver Contacts (Power Rated) | | **03** | Termination | Straight PC Terminals | | **5D** | LED Color | **Amber** LED (Single Element) | | **3JB** | Cap Style/Color | Clear Lens with White Filter/Diffuser | --- ### 2. Electrical Specifications The internal electronic components are designed for reliability and power handling. * **Current/Voltage Rating:** 5A @ 125/250V AC or 5A @ 30V DC. * **Contact Resistance:** 50 milliohms maximum. * **Insulation Resistance:** 200 Megohms minimum @ 500V DC. * **Dielectric Strength:** 1,000V AC minimum between contacts; 1,500V AC minimum between contacts and case. * **LED Forward Current ($I_f$):** Typically 20mA. * **LED Forward Voltage ($V_f$):** Typically 2.0V (Requires an external resistor for higher voltage circuits). --- ### 3. Key Electronic Features * **DPDT Logic:** This switch can control two separate circuits simultaneously. Since it is "Double Throw," it can toggle between two different output paths for each pole. * **Momentary Action:** The switch only completes the circuit while it is being physically pressed. It returns to its "normal" state immediately upon release. * **Integrated Illumination:** The "5D" designation refers to an Amber LED integrated into the housing. This allows for status feedback (e.g., Power On, Fault, or Active). * **Snap-in Design:** The housing features tension tabs that allow the switch to be pushed into a panel cutout without additional mounting hardware. --- ### 4. Physical Construction ```text Structure: [ Clear Cap ] <- Protective lens [ Diffuser ] <- Evenly spreads Amber LED light [ LED Unit ] <- Integrated light source [ Contacts ] <- Silver plated for high conductivity [ Terminals ] <- PC board pins for soldering ``` ---