Products Description
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Technical Specifications
| Parameter | Description |
|---|---|
| Product Model | Allen-Bradley 1336-SN-SP21A |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Series | 1336 Adjustable Frequency AC Drive Series |
| Product Type | Inverter Snubber PC Board Assembly |
| Function | Protects inverter power switching components by suppressing voltage spikes and transient electrical surges during switching operation |
| Application | Variable frequency drive repair, AC motor control systems, industrial automation equipment |
| Compatible Drive Series | Allen-Bradley 1336 FORCE, 1336 IMPACT, 1336 PLUS, and 1336 PLUS II drives |
| Compatible Drive Frame | 1336STEF Frame C |
| Voltage Class | 460 VAC drive systems |
| Board Function | Inverter snubber circuit protection |
| Circuit Type | RC snubber protection network PCB |
| Protection Function | Reduces switching transients and protects power semiconductors such as IGBT/SCR devices |
| Installation Location | Internal inverter power section of 1336 drive |
| Mounting Type | Internal PCB mounting |
| Board Construction | Industrial-grade printed circuit board assembly |
| Replacement Application | Spare replacement snubber board for compatible Allen-Bradley 1336 drives |
| Compatible Power Range | Approx. 40–60 HP applications (configuration dependent) |
| Dimensions | Approx. 150 × 100 × 35 mm |
| Weight | Approx. 0.30 kg |
FAQ
FAQ
Q1: What is the Allen-Bradley 1336-SN-SP21A used for?
A: The 1336-SN-SP21A is an inverter snubber PCB used to suppress voltage transients and protect inverter power components inside Allen-Bradley 1336 series drives.
Q2: Which drives are compatible with the 1336-SN-SP21A?
A: It is designed for compatible Allen-Bradley 1336STEF Frame C drives and is commonly associated with 460V 1336 FORCE, IMPACT, PLUS, and PLUS II drive applications.
Q3: What is the main function of a snubber board?
A: A snubber board absorbs and limits voltage spikes produced during power switching, reducing stress on inverter semiconductors and improving drive reliability.
Q4: Is the 1336-SN-SP21A a complete variable frequency drive?
A: No. It is only a replacement protection PCB assembly installed inside compatible Allen-Bradley 1336 drive units.
Q5: What problems may indicate a failed snubber board?
A: Possible symptoms include inverter faults, repeated power module failures, overvoltage alarms, abnormal switching behavior, or visible damage to snubber components.
Q6: What are the dimensions and weight of the 1336-SN-SP21A?
A: The approximate dimensions are 150 × 100 × 35 mm, and the weight is approximately 0.30 kg. Actual values may vary depending on hardware revision and packaging.
Q7: Can the 1336-SN-SP21A replace other snubber boards?
A: Replacement should only be performed after confirming the drive series, voltage rating, frame size, PCB revision, and original spare part number. Different 1336 snubber boards are designed for specific power configurations.
Q8: What should be checked before installing the 1336-SN-SP21A?
A: Verify the drive model, voltage rating, board compatibility, mounting position, and connector condition. Disconnect power and fully discharge the DC bus before replacing the snubber board to ensure safe maintenance.
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Packing & Delivery
We will use wear-resistant cartons to seal the boxes, and take photos for your confirmation before sealing. We will pack the boxes only after confirmation.
For express delivery, we will use DHL, UPS, TNT, FedEx and EMS.
Please rest assured that we have a deep cooperation with express delivery companies and can ensure that your goods are delivered to you in good condition.
