A-B | 1336-SN-SP6A | Inverter Snubber PC Board

The Allen-Bradley 1336-SN-SP6A is an Inverter Snubber Printed Circuit Board designed for Allen-Bradley 1336STEF adjustable frequency AC drive systems. The snubber board protects inverter power switching components by suppressing voltage spikes and transient energy generated during switching operations, helping improve the reliability of the drive power section.

The 1336-SN-SP6A is used in 1336 Plus, Plus II, Impact, and Force drive families. It is designed for Frame D inverter assemblies and supports 460 VAC applications from 60 HP to 100 HP, providing a replacement solution for industrial motor control equipment.

Product Parameters

Parameter	Description
Brand	Allen-Bradley (A-B)
Model	1336-SN-SP6A
Series	1336 Drive Series
Product Name	Inverter Snubber PC Board
Board Type	Power Protection Circuit Board
Function	Inverter transient suppression and power switching protection
Application	Adjustable Frequency AC Drive Systems
Compatible Drive Series	1336 Plus, Plus II, Impact, Force, STEF
Voltage Rating	460 VAC
Power Rating	60 HP – 100 HP (460 VAC)
Additional Voltage Rating	40 HP – 50 HP (230 VAC), 75 HP – 100 HP (575 VAC)
Rated Current	180 A
Frame Compatibility	Frame D
Dimensions	Approx. 5.8 x 1.3 x 6.5 in (14.7 x 3.3 x 16.5 cm)
Weight	Approx. 0.75 – 1.7 lbs
Origin / Place of Origin	USA / Mexico manufacturing locations
Product Status	New Surplus / Original Replacement Part
Power Supply	Internal AC Drive Power Circuit
Discontinued	Yes, legacy product; discontinued by manufacturer

Common Questions & Answers

Q: What is the function of the 1336-SN-SP6A?
A: The board provides snubber protection for the inverter section of Allen-Bradley 1336 drives by reducing voltage spikes and electrical stress on power switching components.

Q: Which drives use the 1336-SN-SP6A?
A: It is mainly used with Allen-Bradley 1336STEF Frame D drives, including Plus, Plus II, Impact, and Force configurations.

Q: What are common failure symptoms?
A: Typical symptoms include inverter faults, DC bus abnormalities, overvoltage alarms, unexpected drive shutdowns, or damage to inverter power components.

Q: What should be checked before replacement?
A: Verify the drive series, frame size, voltage class, horsepower rating, board revision, mounting hardware, and connection points before installation.

Q: Is the 1336-SN-SP6A still manufactured?
A: The 1336-SN-SP6A is a discontinued Allen-Bradley spare part and is generally supplied through industrial automation replacement channels.

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