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- Allen Bradley
- 1336-SN-SP6A
- Inverter Snubber PCB
- USA
- 165 × 50 × 140 mm
- 0.77 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Allen Bradley 1336-SN-SP6A 1336 Series Inverter Snubber PCB is a snubber printed circuit board used within compatible Allen Bradley 1336 Series inverter equipment. It belongs to the power-electronics section of the drive rather than the control logic or external interface layer.
A snubber circuit is used to manage electrical transients that occur during switching of power components. In an inverter, rapid switching can produce voltage spikes and oscillations associated with the inductive characteristics of the power circuit. The snubber network helps control these transient effects and supports the electrical operating conditions of the associated switching components.
For maintenance engineers working with legacy 1336 Series drives, the 1336-SN-SP6A can be relevant when servicing the drive’s internal power circuitry. Replacement should be based on the exact drive configuration and original board identification because snubber boards are associated with specific hardware arrangements.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley |
| Model | 1336-SN-SP6A |
| Product Family | 1336 Series |
| Product Type | Inverter Snubber PCB |
| Primary Function | Power Circuit Transient Suppression |
| System Role | Inverter Power Electronics |
| Application | Industrial Variable Frequency Drives |
| Dimensions | 165 × 50 × 140 mm |
| Weight | 0.77 kg |
Product Features
The 1336-SN-SP6A belongs to the internal power-electronics hardware of the Allen Bradley 1336 Series inverter platform.
Key characteristics include:
- Allen Bradley 1336 Series inverter snubber PCB
- Model 1336-SN-SP6A
- Used within compatible inverter hardware
- Associated with the drive’s power switching circuitry
- Helps manage electrical switching transients
- Supports the operating environment of the inverter power circuit
- Suitable for maintenance of established 1336 Series drives
- Intended for system-specific replacement applications
- Requires correct matching with the associated drive hardware
- Suitable for industrial motor-control equipment
The board should be treated as a drive-specific power-electronics component rather than a general-purpose replacement PCB.
Working Principle
The 1336-SN-SP6A operates as part of the drive’s transient-control network.
A simplified power relationship is:
DC / AC Power Circuit → Power Switching Devices → Snubber Network → Motor Output
When semiconductor switching devices change state, the combination of circuit inductance and rapid current changes can produce transient voltage conditions. The snubber network provides an electrical path that helps control these transient effects.
Its practical role is to reduce excessive voltage stress and unwanted electrical oscillation associated with switching events. By controlling the transient behavior around the power devices, the snubber circuit supports the overall operating conditions of the inverter’s power section.
The PCB therefore works together with other internal drive components rather than operating as an independent control module.
Role in a 1336 Series Drive
The snubber PCB belongs to the power-electronics section of the inverter.
Input Power → DC Link / Power Circuit → Switching Devices + Snubber Network → Motor Output
| Drive Section | Function |
|---|---|
| Input Power Section | Receives incoming electrical power |
| DC Link / Power Circuit | Provides the intermediate power path |
| Switching Devices | Controls motor output switching |
| 1336-SN-SP6A | Manages switching transients |
| Control Board | Processes drive commands and control functions |
| Gate / Drive Circuitry | Controls power semiconductor switching |
| Output Section | Delivers controlled power to the motor |
This distinction is important during troubleshooting because a snubber PCB is not responsible for speed commands, parameter processing, or external communication.
Industrial Applications
The 1336-SN-SP6A is relevant to industrial installations that continue to operate compatible Allen Bradley 1336 Series inverter equipment.
| Application | Typical Use |
|---|---|
| Industrial Motor Control | Supporting inverter power circuits |
| Conveyor Systems | Maintenance of motor drives |
| Pumps | Drive power-section servicing |
| Fans and Blowers | Variable-speed drive maintenance |
| Machine Tools | Legacy drive repair |
| Material Handling | Inverter maintenance |
| Manufacturing Lines | Drive system replacement |
| Plant Maintenance | Internal PCB-level repair |
The actual application depends on the specific 1336 Series drive in which the board is installed.
Installation and Maintenance
Because the 1336-SN-SP6A is associated with the inverter’s power section, maintenance requires appropriate electrical safety procedures.
Before replacing the PCB, technicians should:
- Confirm the complete 1336-SN-SP6A part number.
- Identify the exact 1336 Series drive model.
- Record the original PCB position and connections.
- Inspect associated power components.
- Check connectors and wiring for damage.
- Look for signs of overheating or electrical arcing.
- Inspect nearby capacitors and switching components.
- Follow the drive manufacturer’s power-discharge procedures.
- Verify that the DC bus has reached a safe condition before servicing.
- Install the replacement board in the correct position.
- Recheck all connections before energizing the drive.
- Test the inverter under controlled operating conditions.
A failed snubber circuit may be associated with problems elsewhere in the power section, so replacing the PCB without checking surrounding components may not resolve a recurring fault.
Related Components
The snubber PCB operates as part of a larger inverter power architecture.
| Component | Function |
|---|---|
| 1336 Series Drive | Complete variable-speed drive system |
| Power Semiconductor Devices | Perform high-speed switching |
| DC Bus Components | Provide intermediate DC power |
| Control Board | Executes drive control functions |
| Gate Drive Circuit | Controls power-device switching |
| Capacitors | Energy storage and DC-link filtering |
| Motor | Receives variable-frequency drive output |
| Cooling System | Removes heat from power electronics |
The snubber network must work correctly with the associated switching and power-circuit components.
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Allen Bradley 1336-SN-SP6A | 1336 Series Inverter Snubber PCB | Power circuit transient control |
| Allen Bradley 1336-SN-SP10A | 1336 Series Inverter Snubber PCB | Compatible drive power section |
| Allen Bradley 1336-SN-SP14A | 1336 Series Inverter Snubber PCB | Inverter maintenance |
| Allen Bradley 1336-SN-SP15A | 1336 Series Inverter Snubber PCB | Inverter maintenance |
| Allen Bradley 1336-SN-SP16A | 1336 Series Inverter Snubber PCB | Power electronics servicing |
These snubber boards should not be considered interchangeable solely because they belong to the same 1336 Series. The correct board must be matched with the associated drive configuration.
Key Advantages
- Designed for compatible Allen Bradley 1336 Series inverter hardware
- Supports transient control within the power circuit
- Works alongside inverter switching components
- Helps manage electrical stress associated with rapid switching
- Suitable for internal drive maintenance
- Useful for legacy 1336 Series repair projects
- Supports continued operation of established motor-control equipment
- Suitable for PCB-level drive servicing
Technical FAQs
What is the Allen Bradley 1336-SN-SP6A used for in a 1336 Series inverter?
The 1336-SN-SP6A is a snubber PCB associated with the inverter’s power electronics. Its circuitry helps manage transient electrical conditions generated during switching of the drive’s power semiconductor devices.
Why is a snubber circuit important in an inverter power section?
Rapid switching combined with circuit inductance can generate voltage transients and oscillations. A properly functioning snubber network helps control these effects and reduces unwanted electrical stress on associated power components.
What should be inspected when a 1336 Series drive has a suspected snubber PCB fault?
The snubber PCB should be checked together with the surrounding power components, switching devices, capacitors, wiring, connectors, and signs of overheating or arcing. A fault in another part of the power circuit can also damage or overload the snubber network.
How should the 1336-SN-SP6A be selected as a replacement part?
The exact part number should be verified against the original PCB and the specific 1336 Series inverter configuration. Boards from the same product family should not automatically be treated as interchangeable because their electrical application can vary between drive configurations.