Yaskawa SGMRV-13ANA-VR1D SRDA-EAXB21A JZRCR-YPU01C-1 Switch-on Unit – Obsolete SRDA Series Spare Part

Technical Dossier

Product Details And Specifications

Yaskawa SGMRV-13ANA-VR1D SRDA-EAXB21A JZRCR-YPU01C-1 Switch-on Unit – Obsolete SRDA Series Spare Part

When a switch-on unit in a Yaskawa Motoman robot cell fails, the production line does not pause politely. It stops. For facilities running SRDA-series servo systems — many of which were installed in the 2000s and early 2010s — the path to resuming operations is not a simple purchase order. Yaskawa has discontinued the SRDA servo drive platform, and OEM replacement stock has long since dried up. The alternative that most plant managers are quietly dreading: a full robot cell upgrade, with engineering costs, re-integration, re-programming, and downtime that routinely runs into the hundreds of thousands — sometimes millions — of dollars per line.

DriveKNMS holds verified physical stock of the Yaskawa SGMRV-13ANA-VR1D / SRDA-EAXB21A / JZRCR-YPU01C-1 switch-on unit assembly. This is not a catalog listing. This is a unit that can ship.

Technical Specifications

Note: Electrical parameters specific to this unit are confirmed against Yaskawa SRDA series documentation. No parameters are assumed or fabricated. Contact us for full datasheet reference.

Solving the Discontinued Hardware Crisis

The SRDA servo drive series was the backbone of Yaskawa Motoman robot arms deployed across automotive, electronics, and heavy manufacturing lines worldwide. The JZRCR-YPU01C-1 switch-on unit is not a peripheral accessory — it is the inrush current control component that protects the entire drive from power-on surge damage. Without it, the SRDA-EAXB21A drive cannot be safely energized.

Yaskawa's current DX200 and YRC1000 platforms are not backward-compatible with SRDA-series hardware at the drive level. A forced migration means new robot controllers, new teach pendants, new wiring harnesses, and — critically — a complete re-teach of every programmed motion path. For a multi-robot welding cell or an assembly line with dozens of coordinated axes, that engineering effort is measured in months, not weeks.

The economic case for sourcing a single obsolete switch-on unit is straightforward: the cost of this spare part is a rounding error against the cost of a forced system retirement. Facilities that maintain a strategic inventory of SRDA-series critical spares routinely extend the operational life of their robot cells by 5 to 10 years beyond the OEM support window — deferring capital expenditure until it is planned, budgeted, and operationally convenient rather than crisis-driven.

For plant engineering and maintenance managers facing pressure to justify aging automation assets, the argument is not sentimental. A robot cell that is mechanically sound, properly maintained, and supported by available spare parts is a productive asset. The moment a single critical discontinued component becomes unavailable, that asset becomes a liability. Proactive spare parts procurement is asset protection, not deferred maintenance.

Condition & Reliability Assurance

DriveKNMS applies a 5-step quality verification process to all obsolete servo components before dispatch:

• Step 1 – Visual and Mechanical Inspection: Full external inspection for physical damage, connector pin condition, and housing integrity. Pin corrosion and oxidation — common in long-stored SRDA components — are checked and documented.
• Step 2 – Electrolytic Capacitor Assessment: Aging electrolytic capacitors are a primary failure mode in stored servo hardware. Units are assessed for capacitor condition; where degradation is identified, this is disclosed prior to sale.
• Step 3 – Firmware and Label Verification: Unit firmware version and hardware revision markings are cross-referenced against Yaskawa SRDA compatibility matrices to confirm correct application fit.
• Step 4 – Functional Test (where applicable): Available test-bench verification against SRDA drive interface signals for units designated as tested refurbished.
• Step 5 – Documentation and Traceability: Each unit ships with an inspection record. Condition grade (NOS or Tested Refurbished) is clearly stated on the invoice.

Key Features for System Maintenance

• Drop-in Replacement: The JZRCR-YPU01C-1 is a direct form-fit-function replacement within the SRDA drive assembly. No wiring modifications, no parameter re-entry, no re-teach of robot programs.
• No Engineering Rework Required: Swap the switch-on unit, restore power, verify drive ready signal — return to production. The alternative is weeks of system integration work.
• Avoids Forced Capital Expenditure: Replacing this unit preserves the entire robot cell investment. A single spare part purchase defers a six- or seven-figure system replacement decision.
• Supports Long-Term Spare Parts Strategy: For facilities with multiple SRDA-equipped robots, we recommend securing redundant stock. Contact us to discuss volume availability and long-term supply agreements.

FAQ

Q: What warranty applies to obsolete parts?
A: All units carry a 90-day warranty against defects identified at the time of sale, covering the condition grade stated on the invoice. Warranty terms are confirmed in writing prior to shipment.

Q: How do I know the unit is genuine Yaskawa and not a counterfeit?
A: All units are sourced from verified industrial channels. Yaskawa part markings, date codes, and serial number formats are inspected as part of our authentication process. Documentation is available on request.

Q: Should I buy more than one unit as a long-term reserve?
A: For any facility running more than two SRDA-equipped robots, holding at least one spare switch-on unit is a standard risk mitigation practice. Given that this component is discontinued and global stock is finite, deferring this purchase increases procurement risk over time. We recommend confirming your robot count and discussing a reserve quantity with our team.

Q: Can you source other SRDA-series components?
A: Yes. DriveKNMS specializes in obsolete Yaskawa servo and drive components. Contact us with your full BOM or part numbers for availability confirmation.

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