Allen-Bradley 1336-PB-SP6C (74101-181-51) PC Board Precharge | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1336-PB-SP6C (Rockwell Automation part number 74101-181-51) is an OEM precharge PC board designed for the 1336 PLUS series AC variable frequency drives. This board manages the DC bus precharge sequence, protecting power components from inrush current during drive startup. Konmask.com supplies genuine and compatible replacement units with full traceability for industrial automation environments.
Technical Specifications
| Attribute | Detail |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Part Number | 1336-PB-SP6C |
| Internal Reference | 74101-181-51 |
| Function | DC Bus Precharge Control PC Board |
| Compatible Drive Series | 1336 PLUS, 1336 PLUS II (select frames) |
| Board Type | Precharge / Soft-Start Control |
| Mounting | Internal drive chassis mount |
| Weight (approx.) | 300 g |
| Condition Available | New OEM, Refurbished, Tested Exchange |
Compatible Replacement & Equivalent Models
When the original 1336-PB-SP6C is unavailable or discontinued, the following alternatives may be evaluated depending on drive frame size and firmware revision:
- 1336-PB-SP6C — Direct OEM replacement (this listing)
- 74101-181-51 — Rockwell internal assembly number, same board
- 1336-PB-SP6 — Earlier revision; verify firmware and connector compatibility before substitution
- 1336-PB-SP6B — Intermediate revision; check drive nameplate for compatibility
- Third-party remanufactured boards — Must match PCB layout, connector pinout, and precharge timing parameters
⚠ Always cross-reference the drive’s nameplate, frame size, and firmware version before ordering a replacement. Contact Konmask.com for a free compatibility check.
Why Choose the Original Model
- Exact OEM fit — Designed and tested to Rockwell Automation specifications for the 1336 PLUS platform
- Validated precharge timing — Ensures correct DC bus ramp-up, preventing capacitor stress and drive faults
- Plug-and-play replacement — No firmware changes or parameter adjustments required when using the correct revision
- Long-term reliability — OEM components carry full traceability and are manufactured to industrial-grade standards
- Reduced downtime risk — Eliminates compatibility uncertainty associated with non-OEM substitutes
Typical Applications
- AC drive precharge circuit repair and board-level replacement in 1336 PLUS drives
- Preventive maintenance stock for facilities running Allen-Bradley 1336 series VFDs
- OEM machine builders requiring certified spare parts for drive panels
- Industrial service centers performing drive refurbishment and exchange programs
- Process industries: water treatment, HVAC, conveyor systems, pump & fan control
System Compatibility
- Drive Series: Allen-Bradley 1336 PLUS (1336F), 1336 PLUS II (1336S) — verify frame and catalog suffix
- Control Platform: Compatible with RSLogix 5000 / Studio 5000 managed systems where 1336 drives are integrated via DeviceNet or hardwired I/O
- Power Range: Applicable across standard 1336 PLUS horsepower ratings where this precharge board variant is specified
- Not compatible with: 1336 IMPACT, 1336 FORCE, or PowerFlex series without engineering verification
Selection Guide
Use the following criteria to confirm the correct precharge board for your 1336 PLUS drive:
- Step 1 — Identify drive catalog number: Locate the full catalog number on the drive nameplate (e.g., 1336F-BRF050-AN-EN)
- Step 2 — Confirm frame size: The precharge board variant is frame-dependent; SP6C applies to specific frame sizes — consult the 1336 PLUS User Manual (publication 1336 PLUS-6.2)
- Step 3 — Check board revision: Inspect the existing board’s silkscreen or label for revision suffix (SP6, SP6B, SP6C) to ensure like-for-like replacement
- Step 4 — Verify firmware: Some board revisions require minimum drive firmware versions — confirm with Rockwell TechConnect or Konmask.com support
- Step 5 — Contact us: Provide your full drive catalog number and we will confirm compatibility before shipment
Quality Assurance & Sourcing
- All units sourced through authorized distribution channels or certified refurbishment partners
- Functional test performed prior to shipment: precharge relay actuation, signal integrity, and visual inspection
- Anti-static packaging with humidity indicator cards for safe transit
- Certificate of conformance available upon request for MRO and OEM procurement teams
- Traceability documentation (lot number, test date, condition grade) included with each shipment
How to Order
- Online: Add to cart directly from this page — stock status shown in real time
- Email RFQ: Send your drive catalog number and required quantity to [email protected]
- Phone / WhatsApp: +0086 19859288691 — available for urgent requirements and bulk pricing
- Lead time: In-stock units ship within 1–2 business days; sourced units typically 5–10 business days
- Minimum order: 1 piece; volume discounts available for 5+ units
Replacement & Compatibility FAQ
Q: Can I use a 1336-PB-SP6B instead of the SP6C?
A: Possibly, but revision differences may affect precharge timing or connector layout. Always verify against your drive’s service manual before substituting.
Q: Is this board compatible with the 1336 PLUS II (1336S)?
A: Some 1336 PLUS II frames share precharge board designs with the 1336 PLUS. Provide your full catalog number for confirmation.
Q: Do you offer exchange / core return pricing?
A: Yes. Send your faulty board as a core return and receive a discount on the replacement. Contact us for exchange program details.
Q: What warranty is provided?
A: New OEM units carry the standard Rockwell Automation warranty. Refurbished units carry a 12-month Konmask.com functional warranty.
Q: Can you source this board if it shows as discontinued?
A: Yes. Konmask.com specializes in sourcing obsolete and long-lead Allen-Bradley components. Contact us with your requirement.
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Contact: [email protected] | +0086 19859288691
