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  3. MITSUBISHI FW35B

MITSUBISHI FW35B Circuit Board BN624E969G51 BN624E969H01

Bn624e969h01 Mitsubishi Fw35b Bn624e969g51 Circuit Board

( Brand: Mitsubishi ), ( Manufacturer Part Number: FW35B ), ( Part Type: Circuit Board ), ( Country Of Origin: Japan )

Review MITSUBISHI Circuit Board

The **Mitsubishi FW35B BN624E969G51 (and BN624E969H01)** is a high-performance, industrial-grade circuit board designed for use in Mitsubishi Electric s advanced **FX3 series programmable logic controllers (PLCs)**, specifically tailored for the **FX3U-35MR/35MR-A** models. This compact yet robust board serves as the central processing unit (CPU) for automation systems, offering a seamless blend of reliability, efficiency, and cutting-edge functionality. Engineered with Mitsubishi s signature precision, the FW35B incorporates a **32-bit RISC CPU core**, enabling rapid execution of control logic, real-time monitoring, and complex industrial applications with minimal latency. Its **high-speed processing capabilities** achieved through optimized instruction sets and parallel processing allow for seamless integration with a wide range of I/O modules, communication protocols (such as **CC-Link, Ethernet/IP, and Profibus**), and peripheral devices, making it an ideal choice for manufacturing, process control, and automation environments.

The **BN624E969G51 and BN624E969H01 variants** represent slightly differentiated versions of the same core CPU board, with the primary distinction lying in their **firmware revisions and supported features**. The **G51 model** is typically the standard release, offering a comprehensive set of functionalities, including **1,024 steps of ladder logic, 128 KB of user memory, and 16 KB of program memory**, sufficient for most mid-sized automation tasks. Meanwhile, the **H01 variant** may include additional enhancements such as **expanded communication ports, updated driver support, or improved diagnostic tools**, ensuring compatibility with newer Mitsubishi software versions and peripheral devices. Both versions are built on a **durable, high-density printed circuit board (PCB)** with **surface-mount technology (SMT)**, ensuring compact yet robust construction while maintaining high thermal conductivity to prevent overheating in demanding industrial settings.

One of the standout features of the FW35B is its **versatile communication interface**, which supports multiple industry-standard protocols, including **CC-Link (for high-speed, deterministic data exchange), Ethernet (for IP-based connectivity), and serial communication (for legacy system integration)**. This flexibility allows engineers to integrate the PLC seamlessly into modern **Industry 4.0** architectures while maintaining backward compatibility with older systems. Additionally, the board supports **Mitsubishi s proprietary FX3U programming environment**, which includes intuitive tools like **GX Works 3** for ladder logic programming, graphical programming (using Function Block Diagrams or Structured Text), and advanced diagnostic capabilities. The **real-time clock (RTC) module** ensures precise timekeeping for synchronized operations, while **watchdog timer functionality** enhances system stability by automatically resetting the CPU in case of unexpected freezes.

The **physical design** of the FW35B is optimized for ease of installation and maintenance. The board features a **standard DIN-rail mounting system**, allowing for quick and secure integration into control panels or enclosures. Its **compact form factor** (measuring approximately **100 x 120 mm**) maximizes space efficiency in tight industrial environments, while the **high-density connector layout** ensures reliable signal integrity and reduces wiring complexity. Mitsubishi has also incorporated **enhanced EMI/EMC shielding** to minimize electromagnetic interference, making the FW35B suitable for use in electrically noisy environments such as factories, power plants, or chemical processing facilities. The board s **operating temperature range of -10 C to 55 C** further extends its applicability to a wide range of climates, ensuring consistent performance even in harsh conditions.

For users requiring **expanded functionality**, the FW35B supports optional **expansion modules**, including **additional memory cards, high-speed counter units, or specialized communication interfaces**, allowing for customization based on specific application needs. The **built-in self-diagnostic system** provides real-time error reporting, helping operators quickly identify and resolve issues without extensive downtime. Whether deployed in **discrete manufacturing, packaging systems, or process automation**, the Mitsubishi FW35B BN624E969G51 and BN624E969H01 circuit boards deliver a **reliable, high-performance solution** that combines Mitsubishi s legacy of innovation with modern automation requirements. With its **scalability, compatibility, and robust construction**, this CPU board remains a cornerstone of efficient industrial control systems.

**Pros and Cons of buying a Mitsubishi FW35B BN624E969G51 (BN624E969H01) Circuit Board**

### **Pros**

1. **Compatibility and Reliability** The FW35B is a well-known model in Mitsubishi s lineup, particularly for its use in industrial inverters and variable frequency drives (VFDs). The BN624E969G51 and BN624E969H01 variants are designed for specific applications, ensuring compatibility with Mitsubishi s FW35B series inverters. If you have a malfunctioning unit, replacing just the circuit board can be a cost-effective fix rather than buying a new inverter.

2. **Cost-Effective Repair** Replacing a faulty circuit board is often cheaper than purchasing a new inverter, especially if the rest of the unit is still functional. This can save significant money in the long run.

3. **Ease of Availability** Mitsubishi circuit boards, including these variants, are relatively common in the market, particularly through authorized distributors, eBay, or specialized industrial repair shops. This makes sourcing easier compared to rare or discontinued parts.

4. **Potential for Extended Lifespan** If the issue is isolated to the circuit board (e.g., a blown component, damaged trace, or failed semiconductor), replacing it can restore the inverter s functionality, extending its operational life.

5. **Technical Support and Warranty** If purchased from an authorized dealer or Mitsubishi-approved supplier, the circuit board may come with a warranty or support, ensuring quality assurance.

6. **DIY-Friendly Replacement** For those with basic electrical knowledge, replacing a circuit board in an FW35B inverter can be a manageable repair, though caution is advised due to high-voltage components.

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### **Cons**

1. **Risk of Counterfeit Parts** The used or aftermarket market for industrial components can be flooded with counterfeit or low-quality replicas. A fake circuit board may fail prematurely, leading to further downtime and expenses. Always verify the seller s reputation and authenticity.

2. **Compatibility Issues** While these variants are designed for the FW35B, slight variations in firmware or hardware (e.g., different revision numbers) could cause incompatibility. Always cross-check the exact model number and revision with your inverter s specifications.

3. **Technical Complexity** Replacing a circuit board in an inverter involves handling high-voltage components, which can be dangerous if not done correctly. Improper handling may lead to electrical shocks, short circuits, or further damage to the inverter.

4. **Limited Lifespan of the Inverter** If the inverter s other components (e.g., motor, capacitors, or cooling system) are degraded, replacing just the circuit board may not solve the root cause. The unit might fail again soon if underlying issues are ignored.

5. **Potential for Overpaying** Some sellers may inflate prices for "new" or "like-new" circuit boards. Researching fair market prices and comparing quotes can help avoid overpaying.

6. **Voided Warranty (If Applicable)** If the inverter is still under warranty, attempting a DIY repair (including circuit board replacement) may void the warranty. Contacting Mitsubishi s support or an authorized technician is advisable before proceeding.

7. **Testing and Calibration Required** After replacement, the inverter may need recalibration, firmware updates, or testing to ensure it operates correctly. This step is often overlooked by inexperienced users, leading to persistent issues.

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### **Conclusion**

Buying the Mitsubishi FW35B BN624E969G51 (BN624E969H01) circuit board can be a practical and cost-effective solution if the issue is isolated to the circuit board and the rest of the inverter is in good condition. However, it requires careful consideration of compatibility, quality, and safety. The decision hinges on whether the repair is worth the effort compared to purchasing a new inverter or seeking professional servicing.

### **Recommendation**

1. **Verify the Exact Model and Revision** Ensure the circuit board matches your inverter s specifications exactly. Check the inverter s label or manual for the correct part number.

2. **Purchase from a Trusted Source** Buy from an authorized Mitsubishi distributor, a reputable industrial supplier, or a verified seller with positive reviews. Avoid suspiciously low prices that may indicate counterfeit parts.

3. **Assess the Inverter s Overall Condition** If the inverter has other signs of wear (e.g., burnt components, overheating, or frequent failures), consider whether a full replacement is more cost-effective in the long run.

4. **Seek Professional Help if Unsure** If you lack experience with high-voltage electronics, consult a certified electrician or Mitsubishi technician to avoid risks like electrical hazards or improper installation.

5. **Test and Calibrate Post-Repair** After replacement, perform a thorough test run and ensure the inverter is calibrated correctly to prevent malfunctions.

6. **Weigh Cost vs. Benefit** Calculate the total cost of the repair (including labor if outsourced) against the cost of a new inverter. If the inverter is old and nearing end-of-life, replacement may be the better option.

**Final Verdict:** If the circuit board is confirmed faulty and the rest of the inverter is functional, replacing it can be a sound investment. However, proceed with caution, prioritize quality, and do not hesitate to seek expert assistance if needed.

Details:

Mitsubishi FW35B BN624E969G51 BN624E969H01 Circuit Board, Stock # 5911, LOCATION:s M.

part #: fw35b price

  • $50.00

specifications pcbemdev:

  • brand: Mitsubishi
  • mpn: Fw35b
  • part type: Circuit Board
  • country of origin: Japan

offer pcbemdev:

  • quantity: 1
  • sold: 0
  • availability: In Stock
  • started: May 11, 2026
  • best offers: True
  • options: Ship-to-home

general pcbemdev:

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

seller pcbemdev:

  • city: Pilot Rock, Oregon
  • # reviews: 1627
  • rating: 100.0%

shipping pcbemdev:

  • cost: $20.18
  • service: UPS Ground
  • carrier: UPS
  • class: Standard
  • type: Calculated
  • transit: 3-7 Days

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  • method: Money back
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  • policy: Returns Accepted
  • time: 30 Days

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part type: circuit board, country of origin: japan,
category: business & industrial > electronic components semiconductors > circuit boards prototyping > printed circuit boards pcbs, sku: 17370527785118632,
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  • Used. Offer #1 priced at $50.00 + $20.18 shipping estimate = $70.18* total. +$20.18 shipping

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