ALLEN BRADLEY 104-A09NZ243 Reversing Contactor 24VDC 9A 332189

( Brand: Allen Bradley ), ( Manufacturer Part Number: 104-A09NZ243 ), ( Part Type: Contactor )

Review ALLEN BRADLEY Series Reversing Contactor 24vdc 9a Max #332189

The **Allen-Bradley 104-A09NZ243** is a high-performance, industrial-grade reversing contactor designed for precise control of three-phase AC motors in demanding automation applications. Part of Rockwell Automation s reliable 104 series, this compact yet robust device is engineered to provide seamless bidirectional motor reversal with exceptional durability and efficiency. Operating on a **24V DC control voltage**, it delivers a **9-ampere contact rating**, making it well-suited for light to medium-duty motor control tasks in factory automation, conveyor systems, pump applications, and other industrial environments where smooth and reliable motor reversal is essential. The contactor features **normally open (NO) and normally closed (NC) auxiliary contacts**, allowing for flexible integration into control circuits, while its **three-phase main contacts** ensure robust handling of standard AC motor loads. Constructed with high-quality materials, including corrosion-resistant components and reinforced insulation, this contactor is built to withstand harsh conditions, including temperature fluctuations, vibration, and electrical noise, ensuring long-term reliability in continuous operation. Its **compact, DIN-rail-mountable design** optimizes space efficiency in control panels, while its **low power consumption** and **fast response time** enhance overall system performance. Whether used in automated manufacturing, material handling, or HVAC systems, the **104-A09NZ243** provides a dependable solution for reversing motor control, combining precision engineering with the durability expected from Rockwell Automation s trusted brand.

### **Pros and Cons of buying a Allen-Bradley 104-A09NZ243 Reversing Contactor (24VDC, 9A, Part #332189)**

1. **Reliability and Brand Reputation** Allen-Bradley (now part of Rockwell Automation) is a well-established manufacturer known for high-quality industrial components. This contactor is designed for durability in harsh environments, reducing long-term maintenance needs.

2. **Compatibility with PLC Systems** The 24VDC coil voltage makes it ideal for integration with common PLCs (e.g., Allen-Bradley SLC, ControlLogix, or other 24VDC-powered systems). It aligns with standard industrial control setups.

3. **Reversing Functionality** The reversing design allows for bidirectional motor control (forward/reverse), which is essential for applications requiring motor speed or direction changes (e.g., conveyors, pumps, or positioning systems).

4. **Current Rating (9A)** Suitable for low-to-medium power applications (e.g., small motors, solenoids, or lighting circuits). The 9A rating provides flexibility for many standard industrial tasks without excessive power handling.

5. **Compact and Standardized Design** Fits within typical control panel layouts, making installation straightforward. The NEMA 1 or NEMA 4 enclosure options (depending on model variant) ensure compatibility with standard mounting systems.

6. **Low Voltage Operation (24VDC)** Reduces fire hazards compared to higher voltage systems and is safer for operator proximity in control panels.

7. **Long Lifespan** High-quality contact materials (likely silver or silver-plated) ensure reliable switching over thousands of operations, minimizing wear-related failures.

8. **Easy Replacement for Legacy Systems** If replacing an older contactor, this part is likely a direct drop-in replacement for similar Allen-Bradley or Rockwell models, reducing downtime.

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1. **Limited Current Capacity (9A)** Not suitable for high-power applications (e.g., large motors, heavy machinery, or high-current loads). For motors exceeding 1 HP (depending on voltage), a higher-rated contactor (e.g., 15A, 20A, or 30A) would be required.

2. **24VDC Coil Dependency** Requires a stable 24VDC power supply. If the system lacks this voltage source, additional components (e.g., a DC-DC converter) may be needed, adding cost.

3. **Potential for Contact Welding** Like all contactors, prolonged arcing or inrush currents can cause contact welding, requiring periodic maintenance or replacement of contacts. This is more common in inductive loads (e.g., motors).

4. **No Built-in Overload Protection** The contactor itself does not include overload protection (e.g., thermal overload relays). Users must pair it with separate overload protection devices for motor circuits to prevent damage from sustained overloads.

5. **Cost Relative to Simpler Contactors** Compared to basic non-reversing contactors, this reversing model is more expensive due to its dual-pole design and additional mechanical components. For simple on/off applications, a cheaper contactor may suffice.

6. **Limited Environmental Ratings (Standard Enclosure)** Unless specified otherwise, the standard enclosure may not be rated for extreme conditions (e.g., high humidity, corrosive environments, or explosive atmospheres). Specialized enclosures (e.g., NEMA 4X) would be needed for harsh settings.

7. **Compatibility with Non-Allen-Bradley Systems** While widely compatible with Rockwell Automation PLCs, integration with third-party controllers may require additional wiring or interface components.

8. **Availability and Lead Times** As an older or discontinued part (depending on the market), stock availability may be inconsistent. Some distributors may carry it, but others might require special ordering, leading to delays.

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### **Conclusion**

The **Allen-Bradley 104-A09NZ243** is a **reliable, mid-range reversing contactor** well-suited for **low-to-medium power applications ( 9A, 24VDC)** where bidirectional motor control is needed. Its strengths lie in **brand trust, PLC compatibility, and compact design**, making it a practical choice for industrial automation tasks like conveyors, small pumps, or positioning systems.

However, its **limited current rating, lack of built-in overload protection, and dependency on 24VDC** may pose challenges for certain applications. Additionally, users must ensure proper pairing with overload relays, auxiliary components, and compatible control systems.

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### **Recommendation**

- You need a **reversing contactor for a 24VDC PLC-controlled system** with loads 9A.

- Your application requires **bidirectional motor control** (e.g., forward/reverse operation).

- You prioritize **Allen-Bradley/Rockwell Automation compatibility** and reliability.

- The environment is **moderate** (not extreme humidity, dust, or corrosive conditions).

- Your load exceeds **9A** (opt for a higher-rated contactor, e.g., 15A or 20A).

- You lack a **24VDC power supply** (may need a DC-DC converter).

- The application demands **overload protection** (must add a thermal overload relay separately).

- You require **higher environmental ratings** (e.g., NEMA 4X for outdoor use).

- Cost is a major concern (a basic reversing contactor from another brand may suffice).

- **Allen-Bradley 104-A09NZ243B** (if available, may have improved contact life).

- **Siemens 3TF11** or **Schneider Electric LRS2** (similar reversing contactors with competitive pricing).

- **Omron G2R** (for 24VDC reversing applications with different mechanical design).

- **Higher-rated contactors** (e.g., 15A or 20A) if your load approaches or exceeds 9A.

**Final Note:** Always verify the **exact part number and variant** (e.g., enclosure type) with your distributor, as slight variations (e.g., NEMA 1 vs. NEMA 4) can affect performance. Test compatibility with your PLC and load before full integration to avoid issues.

Details:

MANUFACTURER PART NUMBER: 104-A09NZ243. MAX IEC 947 BS 5424 VDE 0660. ALLEN BRADLEY 104-A09NZ243 SERIES.

part #: 104a09nz243 prices

• $18.75-$102.99

specifications automationjack:

• brand: Allen Bradley
• mpn: 104-a09nz243
• part type: Contactor

payments automationjack:

• other
• credit card: Diners-club
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general automationjack:

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

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• # reviews: 21694
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• policy: No Returns

offer automationjack:

• best offers: True
• availability: In Stock
• quantity: 1
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• sold: 0
• started: May 10, 2026

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