The **LP4-EE-1-R-B-A-B-R** is a high-quality, illuminated pushbutton switch manufactured by **E-Switch**. This specific model belongs to the LP4 series, which is known for its right-angle mounting and compact design for PCB applications. --- ### 1. Part Number Breakdown To understand the electronic and mechanical characteristics, we can decode the part number suffix: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | LP4 | Low profile, illuminated pushbutton | | **Circuit** | EE | DPDT (Double Pole, Double Throw), Latching (Stay-on) | | **Mounting** | 1 | Right-angle PCB mount | | **Illumination** | R | Red LED | | **Housing** | B | Black Housing | | **Cap Style** | A | Square Cap | | **Cap Color** | B | Black Cap | | **LED Color** | R | Red LED | --- ### 2. Technical Specifications The electrical and mechanical ratings determine where this switch can be used in a circuit. #### Electrical Parameters * **Contact Rating:** 100mA @ 30VDC * **Contact Resistance:** 50mΩ Max (initial) * **Insulation Resistance:** 100MΩ Min @ 500VDC * **Dielectric Strength:** 500VAC for 1 minute * **Operating Life:** 50,000 Cycles #### Mechanical Parameters * **Operating Force:** 150 ± 50 gf * **Travel:** Full travel: 4.5mm; Lock travel: 2.5mm * **Function:** Latching (Push-on, Push-off) --- ### 3. Key Electronic Features #### Dual Pole Double Throw (DPDT) The "EE" designation indicates a **DPDT** configuration. This means the switch can control two separate circuits simultaneously. When the button is pressed, it switches two sets of contacts from their "Normally Closed" (NC) position to their "Normally Open" (NO) position. #### Right-Angle Mounting Unlike vertical switches, this model is designed to sit horizontally on a PCB. The pins are bent at a 90-degree angle, allowing the button to be pressed from the side of the device or through a front panel while the PCB lies flat. #### Integrated LED (Red) The switch contains a built-in Red LED. Because the LED is integrated, it saves board space. * **Note:** Always use a current-limiting resistor in series with the LED pins to prevent burnout (typically calculated for a 2V drop at 20mA). --- ### 4. Typical Applications * **Audio/Visual Equipment:** Used for channel switching or power buttons. * **Telecommunications:** Network hardware resets or mode selection. * **Instrumentation:** On/off toggles for handheld testing devices. * **Consumer Electronics:** Front-panel controls where space is limited. ---