Brand:Allen Bradley PLC Item No.:1336-SN-SP21A Product Origin:USA Product Dimensions:180 × 20 × 95 mm Product Weight:0.59 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Allen Bradley 1336-SN-SP21A Snubber Circuit Board is an important inverter protection component designed for Allen-Bradley 1336 adjustable frequency drive systems. It provides electrical protection for the inverter power section by controlling transient voltage generated during rapid switching operations.
In industrial automation systems, power semiconductor devices experience significant electrical stress during continuous operation. Effective snubber protection helps reduce voltage overshoot, minimize component wear, and maintain stable drive performance.
The 1336-SN-SP21A offers a reliable maintenance solution for users supporting existing Allen-Bradley drive installations. With its compact design, dedicated protection function, and compatibility with established drive platforms, it helps extend equipment service life and improve system availability.
Technical Specifications and Product Data
Parameter
Specification
Manufacturer
Allen Bradley
Model Number
1336-SN-SP21A
Product Type
Snubber Circuit Board
Compatible Drive Family
Allen-Bradley 1336 Series Adjustable Frequency Drives
Main Function
Transient voltage suppression and inverter protection
Circuit Role
Power switching protection
Application
AC drive inverter maintenance and repair
Installation Type
Internal protection board replacement
Dimensions
180 × 20 × 95 mm
Weight
0.59 kg (1.30 lb)
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Industrial Applications and Drive System Integration
The Allen Bradley 1336-SN-SP21A Snubber Circuit Board is a specialized protection component designed for Allen-Bradley 1336 series adjustable frequency drive systems. It operates within the inverter power section to help reduce voltage spikes and electrical transients generated during high-speed switching, improving the stability and durability of drive power components.
This snubber circuit board is commonly used in industrial automation environments where reliable power switching, inverter protection, and continuous motor operation are required, including:
For facilities maintaining existing 1336 drive installations, the 1336-SN-SP21A provides an effective replacement solution that helps restore inverter protection capability, reduce electrical stress on power devices, and improve long-term drive reliability.
Engineering Advantages and Performance Benefits
The Allen Bradley 1336-SN-SP21A Snubber Circuit Board is designed to improve the protection performance of industrial drive power systems. Its dedicated circuit function helps manage switching-related electrical disturbances and supports stable inverter operation.
Effective Transient Voltage Protection
The board helps suppress voltage spikes created during semiconductor switching, reducing stress on inverter power components.
Improved Power Component Reliability
By controlling transient energy, the snubber circuit helps protect switching devices and contributes to longer component operating life.
Stable Inverter Switching Performance
The module supports smoother switching operation by reducing electrical interference during high-frequency power conversion.
Reliable Maintenance Replacement
The 1336-SN-SP21A provides a practical repair option for restoring damaged protection circuits in existing Allen-Bradley 1336 drive systems.
Optimized Industrial Drive Operation
Its application-specific design supports reliable performance in automation environments where drive availability is critical.
Technical FAQs and Troubleshooting Guide
Q1: What is the main function of the Allen Bradley 1336-SN-SP21A Snubber Circuit Board?
A: The board reduces switching voltage spikes and protects inverter power components from electrical stress.
Q2: Which drive systems are compatible with the 1336-SN-SP21A?
A: The module is designed for compatible Allen-Bradley 1336 series adjustable frequency drive applications.
Q3: What symptoms indicate a damaged snubber circuit board?
A: Common symptoms include repeated inverter faults, unstable switching operation, power component failures, and increased electrical noise.
Q4: Why is a snubber circuit important in an AC drive?
A: It helps absorb transient energy generated during switching events, protecting sensitive semiconductor devices.
Q5: How can technicians diagnose a faulty snubber board?
A: Diagnosis may include visual inspection, checking inverter fault history, testing related power components, and evaluating switching performance.
Q6: What causes snubber circuit board failure?
A: Voltage surges, excessive switching stress, overheating, aging components, and abnormal power conditions can contribute to failure.
Q7: Does replacing the 1336-SN-SP21A require software configuration?
A: No. The board is a hardware protection component and does not require parameter programming after replacement.
Q8: What safety procedures should be followed before replacing the snubber board?
A: Power must be isolated, DC bus voltage must be discharged, and proper electrical safety procedures must be followed before servicing.
Q9: Can a failed snubber board damage inverter transistors?
A: Yes. Loss of transient protection can increase stress on output switching devices and reduce their operating life.
Q10: How can maintenance teams improve snubber circuit reliability?
A: Regular inspection of cooling conditions, electrical connections, and inverter components helps maintain reliable operation.
