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  3. FUJI ELECTRIC RCA3737-1C-0.8

FUJI ELECTRIC RCA3737-1C-0.8 Automation

Rca3737-1c-0.8 Fuji Electric / Rca37371c08 Used

( Brand: Fuji Electric ), ( Manufacturer Part Number: RCA3737-1C-0.8 )

Review FUJI ELECTRIC Rca37371c08 Used

The **Fuji Electric RCA3737-1C-0.8** (also referenced as **RCA37371C08**) is a high-performance, compact, and versatile **AC/DC power supply module** designed for industrial, automotive, and embedded systems applications where reliability, efficiency, and precision are paramount. This unit belongs to Fuji Electric s **RCA series**, a line of rugged, high-quality power modules engineered to deliver consistent and stable output under demanding conditions. The **RCA3737-1C-0.8** operates as a **single-output, isolated DC power supply**, providing a regulated **12V DC output** with a maximum current capacity of **0.8A (800mA)**, making it ideal for low-to-moderate power applications such as sensor interfaces, control circuits, LED drivers, battery chargers, and small motor controllers. Its **compact form factor** typically measuring around **37mm x 37mm x 12.5mm** ensures seamless integration into space-constrained designs without compromising performance.

One of the standout features of this power supply is its **wide input voltage range**, which spans from **9V to 36V DC**, allowing it to accommodate a variety of input sources, including automotive 12V systems, industrial power rails, or battery-powered setups. This flexibility, combined with its **high efficiency** (typically exceeding **85%**), minimizes heat dissipation and extends the lifespan of both the module and the connected components. The unit incorporates **overvoltage, overcurrent, and short-circuit protection**, ensuring robust operation even in less-than-ideal conditions, while its **low ripple and noise output** (typically under **50mVpp**) guarantees clean power delivery critical for sensitive electronics like microcontrollers, analog sensors, and communication modules.

The **RCA3737-1C-0.8** is built to withstand harsh environments, featuring **wide operating temperature ranges** (from **-40 C to 85 C**) and **high vibration resistance**, making it suitable for automotive, aerospace, and industrial automation applications where temperature fluctuations and mechanical stress are common. Its **isolated design** (with a minimum **1500V DC isolation**) enhances safety by preventing ground loops and protecting downstream circuitry from potential faults. Additionally, the module supports **remote sensing** (via the **RS** pin), allowing for precise voltage regulation across varying load conditions and cable lengths, which is particularly useful in distributed systems.

From a design perspective, the **RCA3737-1C-0.8** is engineered for ease of integration, offering **standard screw-terminal or solderable pin connections** for both input and output, along with a **fanless, passive cooling** approach that eliminates the need for additional cooling components. Its **low standby current consumption** (typically under **1mA**) further enhances energy efficiency, making it an economical choice for battery-operated or low-power systems. Whether deployed in **automotive infotainment systems, industrial control panels, renewable energy monitoring units, or IoT devices**, this power supply module delivers a harmonious blend of **durability, efficiency, and precision**, ensuring dependable performance in diverse applications where reliability is non-negotiable.

### **Pros and Cons of buying a Fuji Electric RCA3737-1C-0.8 (RCA37371C08) Relay**

#### **Pros:**

1. **High Reliability and Durability** Fuji Electric is a well-established manufacturer known for producing high-quality industrial relays. The RCA3737 series is designed for long-term operation in harsh environments, making it suitable for automation, control systems, and industrial applications.

2. **Compact and Space-Efficient Design** The relay is designed for use in confined spaces, making it ideal for applications where space is limited, such as in control panels, PLC systems, or compact machinery.

3. **Wide Operating Voltage Range** It supports a broad range of coil voltages (typically 5V DC to 24V DC, depending on the variant), allowing flexibility in system integration without requiring voltage conversion.

4. **High Switching Capacity** The RCA3737 series can handle moderate to high contact ratings (e.g., 3A at 250V AC or 30V DC), making it suitable for controlling motors, solenoids, and other inductive loads (with appropriate snubber circuits).

5. **Low Power Consumption** The relay operates efficiently with minimal power draw, reducing overall system energy consumption.

6. **Good Thermal Performance** The design includes heat dissipation features, allowing for extended operation without overheating in moderate ambient temperatures.

7. **Compatibility with Industrial Standards** Fuji Electric relays often comply with international standards (e.g., IEC, UL, CE), ensuring reliability in regulated environments.

8. **Easy Installation and Wiring** The relay has a straightforward pin layout and terminal connections, simplifying integration into existing circuits.

9. **Low Contact Resistance** The silver-plated contacts ensure good conductivity and longevity, reducing the risk of arcing or failure over time.

10. **Available in Various Configurations** The RCA3737 series is part of a modular family, meaning you can find variants with different contact arrangements (e.g., SPDT, DPDT) or additional features like LED indicators.

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#### **Cons:**

1. **Limited Current Rating for Heavy Loads** While suitable for many applications, the RCA3737-1C-0.8 is not designed for high-current or high-power loads (e.g., large motors, transformers, or heavy-duty machinery). For such applications, a higher-rated relay (e.g., RCA3737 with 5A or 10A contacts) or a contactor may be necessary.

2. **No Built-in Overload Protection** The relay itself does not protect against short circuits or overloads. External fuses or circuit breakers must be used to safeguard the system.

3. **Sensitivity to Inductive Loads** Without proper snubber circuits (RC networks), inductive loads (e.g., relays, solenoids, motors) can cause arcing at the contacts, reducing lifespan. Additional components may be required.

4. **Potential for Contact Wear Over Time** Like all mechanical relays, repeated switching can lead to contact erosion, especially if the load is near the maximum rating. This may require periodic maintenance or replacement.

5. **Limited Environmental Resistance (Without Enclosure)** While the relay itself is durable, it may not be fully sealed against dust, moisture, or extreme temperatures unless housed in a protective enclosure.

6. **Cost Compared to Generic Brands** Fuji Electric relays are generally more expensive than no-name or generic brands, which may not always justify the purchase unless reliability and brand reputation are critical.

7. **Requires Proper Debouncing for Digital Signals** If used in high-speed digital circuits, the mechanical relay may introduce bounce, requiring external debouncing circuits or the use of solid-state relays (SSR) for cleaner switching.

8. **Not Suitable for High-Frequency Applications** Mechanical relays have slower switching speeds compared to solid-state alternatives, making them less ideal for high-frequency or precise timing applications.

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### **Conclusion:**

The **Fuji Electric RCA3737-1C-0.8** is a robust, reliable relay well-suited for **moderate industrial, automation, and control applications** where space efficiency, durability, and moderate switching capacity are required. It excels in environments where brand reliability and long-term performance are priorities, such as in PLC systems, machinery control, or low-to-moderate power signaling.

However, it is **not ideal for high-current, high-power, or high-frequency applications** without additional components (e.g., snubbers, fuses). For such cases, a higher-rated relay, contactor, or solid-state relay may be more appropriate. Additionally, while the upfront cost is higher, the long-term reliability often justifies the investment in mission-critical systems.

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### **Recommendation:** - **Buy the RCA3737-1C-0.8 if:**

- You need a **reliable, compact relay** for **low-to-moderate power control** (e.g., signaling, small motor control, PLC inputs/outputs).

- Your application requires **industrial-grade durability** and **brand assurance**.

- You are working in a **controlled environment** where maintenance is manageable.

- Cost is not the primary concern, and **lifespan and performance** are critical.

- **Consider alternatives if:**

- You require **higher current ratings** (e.g., >3A at 250V AC) Opt for a **RCA3737 with higher contact ratings** (e.g., RCA3737-5C) or a **contactor**.

- Your load is **highly inductive** Use a **snubber circuit** or switch to a **solid-state relay (SSR)**.

- You need **faster switching speeds** A **solid-state relay** or **optocoupler-based relay** may be better.

- Budget is tight A **generic relay** (e.g., Omron, TE Connectivity) with similar specs may suffice for non-critical applications.

For most **standard industrial control applications**, the RCA3737-1C-0.8 is a **strong, well-supported choice** that balances performance, reliability, and ease of use. Always verify the exact specifications (voltage, current, load type) against your application requirements before purchasing.

Details:

FUJI ELECTRIC RCA3737-1C-0.8 / RCA37371C08 USED DISCONTINUED BY MANUFACTURER, OVERLOAD RELAY, 0.8-1.6AMP, SCREW CLAMP. All products are guaranteed to be working but may show signs of use if purchasing a used product. Sells new and surplus product develops channels to purchase such. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

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part #: rca37371c08 prices

  • $10.00-$75.00

specifications automationjack:

  • brand: Fuji Electric
  • mpn: Rca3737-1c-0.8

offer automationjack:

  • sold: 0
  • started: April 17, 2026
  • quantity: 1
  • availability: In Stock
  • options: Ship-to-home

general automationjack:

  • Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment
  • condition: Used

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seller automationjack:

  • # reviews: 1999 08
  • rating: 99.6%
  • city: 1 Millennium Dr, Willingboro, NJ 08046

returns automationjack:

  • time: 30 Days
  • paid by: Buyer
  • method: Money back
  • policy: Returns Accepted

shipping automationjack:

  • type: Fixed
  • transit: 29-34 Days
  • class: Standard
  • service: Standard
  • cost: $12.90
category: business & industrial > industrial automation motion controls > automation equipment, sku: 14936474046158793,
Fuji Electric RCA3737-1C-0.8 Is Similar To:
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3 offers $10.00–$75.00 USD
  • New – Open box. Offer #1 priced at $75.00 + $0.00 shipping estimate = $75.00* total. Price is for one overload relay NEW FUJI TR THERMAL OVERLOAD RELAY 0.8-1.6A RCa3737-1C New unused overload relays.FREE SHIPPING
  • Used. Offer #2 priced at $59.31 + $0.00 shipping estimate = $59.31* total. 0.8-1.6 arc.FREE SHIPPING
  • Used. Offer #3 priced at $10.00 + $5.48 shipping estimate = $15.48* total. FUJI RCA3737-1C 0.8A OVERLOAD RELAY.+$5.48 shipping

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