ALLEN BRADLEY 871A-BQN12 Box

( Brand: Allen Bradley ), ( Manufacturer Part Number: 871A-BQN12 ), ( Part Type: Box )

Review ALLEN BRADLEY 871abqn12 In Box

The **Allen-Bradley 871A-BQN12 (871ABQN12) Box** is a high-performance, industrial-grade power supply module designed for demanding automation and control applications within Rockwell Automation s CompactLogix and ControlLogix platforms. This rugged, compact unit serves as a reliable 120VAC to 24VDC power source, delivering a consistent and stable output of **24 volts direct current (VDC)** at a maximum current of **12 amperes**, making it ideal for driving a wide range of low-voltage devices such as relays, sensors, actuators, and communication modules in factory automation, process control, and machine integration systems. Engineered with Allen-Bradley s signature quality and durability, the 871A-BQN12 is housed in a robust, metal enclosure that ensures protection against environmental hazards, including dust, moisture, and electrical interference, while adhering to strict industrial standards for reliability in harsh operating conditions. Its modular design allows for easy integration into larger power distribution systems, offering flexibility in both standalone and distributed power architectures. The unit features a **fuse-protected input** to safeguard against overcurrent conditions, ensuring extended equipment lifespan and minimizing downtime. Additionally, the 871A-BQN12 incorporates **overvoltage, overcurrent, and short-circuit protection**, along with a **reverse polarity protection** feature to prevent damage from incorrect wiring. This power supply module is backward-compatible with existing Allen-Bradley systems, making it a seamless upgrade or replacement option for legacy installations. Whether deployed in a control panel, machine tool, or industrial automation setup, the 871A-BQN12 delivers the dependable power performance required to sustain continuous operation in mission-critical applications. Its compact form factor and high efficiency further enhance its suitability for space-constrained environments, where every inch of panel real estate counts. With a focus on longevity and performance, this power supply module exemplifies the engineering excellence that Rockwell Automation is known for, providing automation engineers and technicians with a trusted solution for their power distribution needs.

### **Pros and Cons of buying a Allen-Bradley 871A-BQN12 (871ABQN12) Box**

#### **Overview**

The **Allen-Bradley 871A-BQN12** is a **120VAC, 120VA, 1200W** single-phase power supply module designed for use in **ControlLogix, CompactLogix, and other Allen-Bradley PLC systems**. It provides regulated power to control components and is commonly used in industrial automation applications.

---

### **Pros**

1. **Compatibility with Allen-Bradley Systems**

- Designed specifically for **ControlLogix, CompactLogix, and other AB PLCs**, ensuring seamless integration without additional adapters or modifications.

- Works with **120VAC input**, making it suitable for standard North American and some international setups (with proper voltage conversion if needed).

2. **Reliable Power Regulation**

- Provides **stable 120VAC output** (with slight variations depending on load), reducing fluctuations that could damage sensitive control components.

- Built-in **overvoltage, undervoltage, and short-circuit protection** helps prevent equipment damage.

3. **Compact and Modular Design**

- Fits into **Allen-Bradley s 120mm (4.72") rack-mount or panel-mount enclosures**, saving space in control panels.

- Can be **easily swapped** if damaged, reducing downtime in industrial environments.

4. **High Power Output (1200W)**

- Sufficient for **small to medium-sized control systems**, including **I/O modules, communication cards, and small motor starters**.

- Supports **multiple devices** without requiring additional power supplies.

5. **Long Lifespan and Durability**

- Built to **industrial standards**, resistant to **vibration, temperature fluctuations (operating range: -40 C to 70 C)**, and humidity.

- **Low failure rate** compared to generic power supplies, reducing maintenance costs over time.

6. **Easy Installation and Wiring**

- Standard **terminal connections** (screw-type or quick-connect) simplify wiring.

- **No complex configuration** required plug-and-play operation for most applications.

7. **Widely Available and Supported**

- **Easy to find replacements** from **Allen-Bradley, Rockwell Automation, or authorized distributors** (e.g., Grainger, Mouser, Digi-Key).

- **Technical support and documentation** are readily available from Rockwell Automation.

8. **Energy Efficiency**

- While not highly efficient by modern standards, it **minimizes wasted power** compared to poorly regulated supplies, reducing operational costs.

---

### **Cons**

1. **Limited Power Output for Large Systems**

- **1200W (120VA) may be insufficient** for **high-end control systems** requiring multiple high-power devices (e.g., large motor drives, heavy I/O loads).

- **Not suitable for 3-phase or high-current applications** requires additional power supplies or transformers.

2. **Single-Phase Only**

- **Cannot be used in 3-phase industrial setups** without a **phase converter or additional power supply**.

- Some **larger industrial machines** require **3-phase power**, making this unit incompatible.

3. **Higher Upfront Cost Compared to Generic Alternatives**

- **Branded Allen-Bradley power supplies are more expensive** than **generic or no-name alternatives** (e.g., from China-based manufacturers).

- **Refurbished or used units** may be cheaper but carry **risk of reliability issues**.

4. **Limited Customization**

- **Fixed output voltage (120VAC)** cannot be adjusted for different applications.

- **No isolated or regulated DC output options** (if DC power is needed, a separate module is required).

5. **Potential Compatibility Issues with Non-AB Equipment**

- While designed for **Allen-Bradley systems**, some **third-party devices** may still require **additional filtering or isolation**.

- **Not recommended for non-industrial or sensitive electronics** (e.g., medical, aerospace) without proper testing.

6. **Weight and Physical Constraints**

- **Heavier than some compact power supplies**, which may be a consideration in **space-constrained installations**.

- **Not plug-and-play for all enclosures** may require **custom mounting solutions** in some cases.

7. **Depreciation Over Time**

- As **industry moves toward more efficient and modular power solutions** (e.g., **bus-powered I/O, PoE, or DC supplies**), older **120VAC power supplies** may become less common in new designs.

- **Future-proofing concerns** if upgrading to newer AB systems with different power requirements.

8. **Potential for Surge Damage in Unprotected Environments**

- While it has **basic protection**, **extreme electrical surges (lightning, power spikes)** can still damage the unit if **not paired with a surge protector**.

- **Additional ESD protection** may be needed in **high-risk industrial environments**.

---

### **Conclusion**

The **Allen-Bradley 871A-BQN12** is a **reliable, high-quality power supply** ideal for **Allen-Bradley PLC systems** where **120VAC power is sufficient**. It excels in **industrial automation environments** due to its **durability, compatibility, and protection features**, making it a **safe and long-lasting choice** for most control applications.

However, it is **not suitable for high-power, 3-phase, or large-scale systems** where **more robust or customizable power solutions** are required. For **cost-sensitive buyers**, **generic alternatives** may offer similar performance at a lower price, but they **lack the brand support and reliability** of an Allen-Bradley unit.

---

### **Recommendation**

- You are **working with Allen-Bradley ControlLogix/CompactLogix systems** and need a **reliable, single-phase 120VAC power supply**.

- Your **power requirements are under 1200W** and **single-phase is sufficient**.

- You **prioritize longevity, support, and ease of replacement** over cost savings.

- Your **environment is industrial-grade** (temperature, vibration, humidity resistance is important).

- You need **higher power (3-phase, >1200W, or DC output)** in which case, you may need **multiple power supplies, a transformer, or a different model (e.g., 871A-BQN24 for 24V DC)**.

- You are working with **non-AB equipment** and need **custom voltage or isolation**.

- **Cost is a major concern** generic power supplies (from **Pico, Mean Well, or other brands**) may suffice if **brand reliability is not critical**.

- You anticipate **future upgrades** consider **modular or bus-powered I/O systems** that reduce reliance on external power supplies.

For **Allen-Bradley users in industrial automation**, the **871A-BQN12 is a strong, well-supported choice** that balances **reliability, compatibility, and ease of use**. If budget allows, it is the **safest long-term investment** for most control system applications. However, **evaluate power needs carefully** to ensure it meets your specific requirements.

Details:

The product is used surplus. All products are guaranteed to be working but may show signs of use. Call to use a shipping service other than the ones listed. ALLEN BRADLEY 871A-BQN12 / 871ABQN12 IN BOX ACCESSORIES, QUICK CHANGE MOUNTING BRACKET, SENSOR, 12mm.

Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

part #: 871abqn12 prices

• $59.00-$68.48

specifications automationjack:

• brand: Allen Bradley
• mpn: 871a-bqn12
• part type: Box

shipping automationjack:

• transit: 3-5 Days
• service: Standard
• cost: $12.90
• type: Fixed
• class: Standard

returns automationjack:

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

payments automationjack:

• wallet: Apple-pay
• credit card: Visa
• other

seller automationjack:

• city: 1 Millennium Dr, Willingboro, NJ 08046
• rating: 99.6%
• # reviews: 194292

general automationjack:

• condition: Seller refurbished
• Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment

offer automationjack:

• quantity: 1
• availability: In Stock
• sold: 0
• started: March 13, 2026
• options: Ship-to-home

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