The **CD214A-R1400** is a specific surface-mount (SMD) **Rectifier Diode** manufactured primarily by Bourns. It is part of the CD214A series and is designed for power rectification and protection in compact electronic circuits. --- ### 1. Key Technical Specifications The part number "R1400" provides specific clues about its electrical ratings: | Feature | Specification | | :--- | :--- | | **Component Type** | General Purpose Rectifier Diode | | **Maximum Repetitive Peak Reverse Voltage ($V_{RRM}$)** | 400 V | | **Maximum Average Forward Current ($I_{F(AV)}$)** | 1.0 A | | **Peak Forward Surge Current ($I_{FSM}$)** | 30 A (8.3 ms half-sine wave) | | **Maximum Forward Voltage ($V_F$)** | 1.1 V @ 1.0 A | | **Operating Junction Temperature** | -55 °C to +150 °C | | **Package Type** | SMA (DO-214AC) | --- ### 2. Physical Construction and Package The "CD214A" prefix refers to the industry-standard **SMA (DO-214AC)** package. * **Footprint:** Small surface-mount package. * **Termination:** Lead-free (RoHS compliant). * **Marking:** Usually identified by a code on the body (often including "R1400" or a simplified manufacturer code) and a **cathode band** indicating the direction of current flow. --- ### 3. Functional Breakdown * **Rectification:** It allows current to flow in one direction (Anode to Cathode) while blocking it in the reverse direction. This is essential for converting AC to DC. * **Reverse Blocking:** With a 400V rating, it is suitable for circuits connected to AC mains (after initial transformation) or high-voltage DC rails. * **Low Profile:** The SMA package is designed for automated assembly on PCBs where vertical space is limited. --- ### 4. Common Applications Due to its 1A / 400V rating, it is frequently found in: 1. **AC-DC Adapters:** Small power supplies for consumer electronics. 2. **Freewheeling Diodes:** Protecting circuits from inductive spikes (back EMF) in relay or motor drivers. 3. **Polarity Protection:** Preventing damage if a battery or DC input is connected backward. 4. **Lighting:** LED driver circuits and ballasts. --- ### 5. Identification Code Example If you are looking at a PCB and see this component, the naming convention follows: `CD` (Chip Diode) + `214A` (SMA Package size) + `R` (Rectifier) + `1` (1 Amp) + `400` (400 Volts).