YASKAWA HW927381-A-12 Braking Unit | Replacement, Equivalent & Selection Guide
The YASKAWA HW927381-A-12 (also referenced as HW0389174-C and HW9381284-B) is a dedicated braking unit designed for YASKAWA servo and drive systems. This page provides full technical specifications, compatible replacement models, application guidance, and sourcing information to help engineers and procurement teams make confident selection decisions.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | HW927381-A-12 |
| Cross-Reference | HW0389174-C / HW9381284-B |
| Manufacturer | YASKAWA Electric Corporation |
| Product Type | Braking Unit (Dynamic Braking Resistor Module) |
| Series | YASKAWA Drive / Servo Accessory Series |
| Function | Dissipates regenerative energy during motor deceleration |
| Weight | Approx. 600 g |
| Condition | New / Surplus / Refurbished (specify on order) |
| Origin | Japan |
Note: Contact Konmask for full electrical ratings (voltage, resistance, wattage) specific to your drive model.
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as replacements or equivalents for the HW927381-A-12. Always verify electrical ratings and mechanical dimensions before substitution:
- HW0389174-C — YASKAWA OEM cross-reference; functionally identical in supported drive series
- HW9381284-B — Alternate YASKAWA part number; confirm firmware/hardware revision compatibility
- Third-party braking resistor modules rated to match original voltage, resistance (Ω), and continuous power (W) specifications
- YASKAWA CDBR series external braking units (for higher-power applications requiring external resistor banks)
⚠ Important: Substituting braking units without matching resistance and power ratings can damage the drive or cause unsafe deceleration. Always consult YASKAWA documentation or contact Konmask for verified equivalents.
Why Choose the Original Model
- OEM Guaranteed Compatibility — Engineered specifically for YASKAWA drive and servo platforms; no derating or adaptation required
- Thermal Management — Factory-calibrated thermal protection aligned with YASKAWA drive firmware thresholds
- Warranty Integrity — Using genuine YASKAWA parts preserves drive warranty and service agreements
- Traceability — Full OEM traceability for ISO-certified production environments
- Long Service Life — Designed to YASKAWA’s reliability standards for continuous industrial duty cycles
Typical Applications
- CNC machine tool spindle and axis drives
- Industrial robot joint servo systems (YASKAWA Motoman)
- Conveyor and hoist systems with frequent start/stop cycles
- Injection molding machine servo drives
- Crane and elevator drive systems requiring regenerative braking
- Semiconductor and electronics manufacturing equipment
System Compatibility
The HW927381-A-12 braking unit is designed for use with YASKAWA drive and servo controller platforms. Typical compatible systems include:
- YASKAWA Sigma-5 / Sigma-7 Servo Drives
- YASKAWA SGDV / SGDH series servo amplifiers
- YASKAWA Varispeed / A1000 / L1000 series AC drives (verify model-specific compatibility)
- YASKAWA DX100 / DX200 / YRC1000 robot controllers
Always cross-check the drive model number against YASKAWA’s official braking unit selection table before ordering.
Selection Guide
Use the following criteria to confirm the HW927381-A-12 is the correct braking unit for your application:
- Drive Model — Confirm your YASKAWA drive model number and its required braking unit part number from the drive manual
- Braking Resistance (Ω) — Match the minimum allowable resistance rating of your drive
- Power Rating (W/kW) — Ensure the braking unit’s continuous and peak power ratings meet your deceleration duty cycle
- Voltage Class — Confirm 200V or 400V class compatibility with your drive
- Mounting & Dimensions — Verify physical fit within your control cabinet or drive enclosure
- Quantity — For multi-axis systems, calculate total regenerative energy to determine if multiple units or an external resistor bank is required
Not sure which model fits your system? Contact our technical team with your drive model number for a free selection recommendation.
Quality Assurance & Sourcing
- Source: Konmask.com sources YASKAWA components from authorized distributors and verified surplus channels
- Inspection: All units undergo visual inspection and basic functional verification prior to shipment
- Authenticity: Genuine YASKAWA OEM parts with original labeling and traceability documentation where available
- Packaging: Anti-static packaging with protective foam; suitable for international air and sea freight
- Lead Time: In-stock items ship within 1–3 business days; contact us for availability confirmation
How to Order
- Add to cart directly on this page, or
- Email support@konmask.com with your part number, quantity, and required condition (new / surplus / refurbished)
- For bulk or project orders, request a formal quotation — we support NET payment terms for qualified B2B buyers
- International orders: we ship worldwide via DHL, FedEx, and UPS with full customs documentation
Replacement & Compatibility FAQ
Q: Can HW0389174-C directly replace HW927381-A-12?
A: In most YASKAWA drive applications, yes — these are OEM cross-reference numbers for the same functional unit. Confirm with your drive’s service manual or contact Konmask to verify.
Q: Is HW9381284-B a newer revision of HW927381-A-12?
A: YASKAWA periodically issues revised part numbers for updated hardware revisions. Both numbers refer to braking units in the same product family; check the revision letter and your drive’s compatibility list.
Q: Can I use a third-party braking resistor instead?
A: Third-party resistors can be used if they meet the exact resistance (Ω), power (W), and voltage class specifications. However, using non-OEM parts may void the drive warranty. Konmask recommends genuine YASKAWA units for critical applications.
Q: What happens if I use a braking unit with too low resistance?
A: Resistance below the drive’s minimum allowable value will cause excessive braking current, potentially triggering drive fault codes or damaging the drive’s braking transistor. Always verify the minimum resistance specification.
Q: Do you offer warranty on YASKAWA braking units?
A: Yes — new OEM units carry YASKAWA’s standard warranty. Surplus and refurbished units are covered by Konmask’s 90-day functional warranty. Contact us for details.
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