CPC 237-4820 Keypad Pcb Panel Mount Rigid E2 2.10 3.3V FR-4

( Brand: Cpc ), ( Manufacturer Part Number: 237-4820 ), ( Part Type: Panel Mount ), ( Pcb Type: Rigid Pcb ), ( Series: E2 Keypad Rev 2.10 ), ( Operating Voltage: 3.3 V ), ( Item Height: 2.0 ), ( Material: Fr-4 ), ( Item Length: 2.10 )

Review CPC E2 Keypad Rev 2.10 Pcb 3.3v Panel Mount Rigid Fr-4

The **CPC 237-4820 E2 Keypad PCB (3.3V, Panel-Mount, Rigid FR-4)** is a high-performance, compact keypad module designed for embedded systems, industrial control panels, and custom human-machine interface (HMI) applications requiring precise input and robust durability. Engineered with a **rigid FR-4 substrate**, this keypad offers exceptional mechanical stability and resistance to environmental stressors, making it ideal for harsh operating conditions where reliability is paramount. The **E2 keypad variant** features a **2.10" (53.34mm) square form factor**, providing a balanced size that accommodates up to **12 programmable keys** in a grid layout, allowing for flexible customization to match specific application requirements whether for data entry, menu navigation, or control signal input.

Operating seamlessly within a **3.3V power supply range**, this keypad is optimized for low-power microcontroller systems, reducing overall system complexity and energy consumption while maintaining clear, debounced key signals. The **panel-mount design** ensures a clean, flush installation, minimizing clutter in enclosed or space-constrained environments, and its **rigid construction** eliminates flexing or signal interference that could arise from flexible substrates. Each key is designed with **high-contrast, durable membrane switches**, offering tactile feedback and long-term durability against repeated use, dust, and moisture critical for applications in automotive, medical, or industrial settings where reliability is non-negotiable.

The **CPC 237-4820** supports **matrix scanning**, enabling efficient key detection with minimal GPIO pins, which simplifies wiring and reduces board space. Its **programmable key assignments** allow developers to map inputs to custom functions, making it adaptable for everything from simple numeric keypads to complex command interfaces. Additionally, the keypad s **FR-4 material** ensures thermal stability and resistance to soldering heat, while its **surface-mount technology (SMT) or through-hole (TH) compatible design** (depending on variant) offers flexibility in assembly processes. Whether integrated into a custom control panel, a portable device, or an industrial automation system, this keypad delivers a **precise, durable, and low-power input solution** that enhances user interaction while maintaining system integrity under demanding conditions.

### **Pros and Cons of buying a CPC 237-4820 E2 Keypad (2.10" PCB, 3.3V, Panel-Mount, Rigid FR-4)**

1. **Compact and Space-Efficient Design** The 2.10" size makes it suitable for applications where space is limited, such as industrial control panels, embedded systems, or compact IoT devices.

2. **Panel-Mount Compatibility** The rigid FR-4 PCB and panel-mount design allow for easy integration into existing enclosures, reducing assembly complexity.

3. **3.3V Operation** Compatibility with 3.3V logic levels is beneficial for modern microcontrollers (e.g., ARM Cortex-M, ESP32, RP2040) and low-power applications, reducing the need for level-shifting circuits.

4. **Reliable Mechanical Construction** The rigid FR-4 PCB provides durability, making it resistant to flexing or damage during installation and use.

5. **Potential for Customization** Some keypad models in this series support programmable keys, allowing for flexible input configurations (e.g., numeric, alphanumeric, or function keys).

6. **Industrial-Grade Build** The E2 series is often designed for industrial or rugged environments, offering better longevity than consumer-grade alternatives.

7. **Easy Integration with Microcontrollers** Many keypads in this category use standard communication protocols (e.g., SPI, I2C, or direct GPIO) that are easy to interface with common development boards.

8. **Cost-Effective for Bulk Applications** If used in high-volume production, the per-unit cost may be justified by its reliability and compact form factor.

1. **Limited Key Customization** Unlike fully programmable keypads, this model may have fixed key assignments, restricting flexibility in user interface design.

2. **No Backlighting (Unless Specified Otherwise)** If backlit keys are required, this model may not include them, potentially requiring additional modifications or external lighting solutions.

3. **Potential for Limited Documentation** Some niche or older models may lack detailed datasheets or community support, making troubleshooting or integration more challenging.

4. **Dependence on Supplier Availability** As a specialized component, stock availability may be inconsistent, leading to delays in procurement.

5. **No Touchscreen Alternative** If a touch-sensitive interface is desired, this mechanical keypad is not suitable, requiring a separate touchscreen module.

6. **Possible Learning Curve for New Users** Developers unfamiliar with keypad interfacing (e.g., debouncing, scan matrix logic) may need additional time to implement correctly.

7. **Cost for Low-Volume Projects** For one-off or small-scale projects, the price per unit may be higher than off-the-shelf alternatives (e.g., Arduino-compatible keypads).

8. **No Built-In Encryption or Security Features** If the application requires secure input handling (e.g., PIN entry for sensitive systems), additional hardware or software measures will be necessary.

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### **Conclusion**

The **CPC 237-4820 E2 keypad** is a **practical choice for applications requiring a compact, 3.3V-compatible, panel-mount keypad** in industrial or embedded systems. Its rigid construction and space efficiency make it ideal for environments where durability and integration are critical. However, its **fixed key layout, lack of backlighting (unless specified), and potential documentation gaps** may pose challenges depending on the use case.

If your project demands **flexibility in key assignments, backlit keys, or touch input**, alternative solutions (e.g., programmable keypads, touchscreens, or Arduino-compatible modules) might be more suitable. Conversely, if **cost-effective, low-power, and space-constrained input is the priority**, this keypad is a solid option provided you account for any integration complexities upfront.

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### **Recommendation**

- You need a **small, rugged, panel-mount keypad** for an industrial or embedded system.

- Your microcontroller operates at **3.3V** and requires a simple, reliable input method.

- You are working on a **high-volume project** where the per-unit cost is justified by long-term reliability.

- You can **design around its fixed key layout** or accept minimal customization.

- You require **programmable keys, backlighting, or touch input**.

- Your project is **low-volume**, and a more flexible (but potentially pricier) keypad would be easier to integrate.

- You lack experience with **keypad interfacing** (e.g., debouncing, scan matrix logic), as this may require additional development effort.

- **Stock availability or documentation quality** is a concern, and you need immediate support.

- For **programmable keys**, look into **I2C/SPI keypads** (e.g., Adafruit 16-Button Keypad).

- For **backlit or touch-sensitive input**, evaluate **capacitive touch keypads** or **LCD/touchscreen modules**.

- For **Arduino/Raspberry Pi compatibility**, pre-built modules (e.g., Seeed Studio Keypad Shield) may simplify integration.

Details:

CPC E2 Keypad Rev 2.10 PCB 237-4820 3.3V Panel Mount Rigid FR-4.

part #: 2374820 price

• $175.00

specifications pcbemdev:

• brand: Cpc
• mpn: 237-4820
• part type: Panel Mount
• pcb type: Rigid Pcb
• series: E2 Keypad Rev 2.10
• operating voltage: 3.3 V
• item height: 2.0
• material: Fr-4
• item length: 2.10

offer pcbemdev:

• availability: In Stock
• options: Ship-to-home
• quantity: 1
• sold: 0
• started: May 21, 2026
• best offers: True

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general pcbemdev:

• condition: Used
• Electronic Components Semiconductors > Circuit Boards Prototyping > Printed Circuit Boards PCBs

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• policy: No Returns

seller pcbemdev:

• rating: 100.0%
• city: Chester, Illinois
• # reviews: 2

shipping pcbemdev:

• type: Calculated
• class: Standard
• service: USPS Ground Advantage
• cost: $0.00
• transit: 5-11 Days
• carrier: USPS

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