ABB DSQC626A 3HAC026289-001 Servo Power Supply Unit

ABB DSQC626A 3HAC026289-001 — Stop the Clock on Your IRC5 Downtime

Every minute an IRC5 drive cabinet sits dead, your production line is bleeding money. The ABB DSQC626A (3HAC026289-001) Servo Power Supply Unit is the single most common cause of unplanned IRC5 shutdowns — and it is the one module most plants do not keep on the shelf. We do. Stock confirmed in Xiamen. DHL Express cut-off met same business day on orders placed before 15:00 CST.

This is not a generic listing. This is a field-verified, OEM-grade servo PSU pulled from authenticated ABB supply channels, bench-tested for DC bus output stability before it ever gets boxed. If your IRC5 is throwing 38014 – Drive system voltage error or 38301 – DC link voltage too low, the DSQC626A is your first swap. Get it here. Get it fast.

URGENT REQUIREMENT? Contact: [email protected] | WhatsApp: +86 18359268345

Quick Technical Datasheet

Troubleshooting & Replacement Tips

Fault codes that point directly to DSQC626A failure:

• 38014 – Drive system voltage error: DC bus has collapsed or is outside the ±10% tolerance window. Power cycle the cabinet — if the fault returns within 30 seconds of enabling drives, the PSU capacitor bank has failed. Replace DSQC626A.
• 38301 – DC link voltage too low: Typically appears during high-acceleration moves on IRB660 palletizing cycles. The PSU can no longer sustain peak current demand. Capacitor aging is the root cause in units older than 6 years.
• 38302 – DC link voltage too high: Regenerative braking energy is not being absorbed. Check the brake resistor first; if that is intact, the PSU’s regeneration circuit has failed — replace the module.
• 20223 – Motor current too high / drive overload: Can be secondary to a degraded PSU delivering unstable bus voltage. Swap DSQC626A before condemning the drive module.

Step-by-step replacement procedure (IRC5 Single Cabinet):

1. Execute MOTORS OFF from the FlexPendant. Confirm all axes are at rest.
2. Open the main disconnect on the drive cabinet. Lock out / tag out per site LOTO procedure. Wait a minimum of 5 minutes for DC bus capacitors to discharge below 50 V — verify with a calibrated multimeter on the DC bus terminals before touching any module.
3. Photograph the existing cable routing on DSQC626A before disconnecting. The AC input connector (X1), DC bus output busbars, and the 24 V logic connector (X2) must be reinstalled in identical positions.
4. Release the DIN-rail locking tab and slide the module forward. Disconnect X1, X2, and the DC bus busbars in that order.
5. Install the replacement DSQC626A. Reconnect busbars first (torque to 4 Nm), then X1 and X2. No firmware flashing required — the module is parameter-free hardware.
6. Close the cabinet. Restore power. On the FlexPendant, navigate to Event Log → Clear All, then execute MOTORS ON. Run a slow-speed jog on each axis to confirm stable DC bus voltage (monitor via ABB RobotStudio → Controller → I/O → Drive System → DC Bus Voltage).
7. If fault 38014 persists after module swap, check the upstream 3-phase input for phase imbalance (>2% imbalance will cause repeated PSU trips).

Configuration notes: The DSQC626A carries no DIP switches, no address settings, and no firmware. It is purely analog power hardware. There is no software commissioning step. The only post-installation check is DC bus voltage confirmation at rated load.

Reliability in Harsh Conditions

The DSQC626A was designed for the inside of an IRC5 drive cabinet — which means it was engineered to survive environments that would kill consumer-grade electronics in weeks. ABB’s design spec for this module targets continuous operation in foundry-adjacent installations where ambient cabinet temperatures regularly hit 45–50 °C, where vibration from nearby presses and conveyors is constant, and where power quality from the plant grid is far from clean.

The DC bus capacitor bank uses industrial-grade electrolytic capacitors rated for 105 °C core temperature, giving a calculated MTBF of over 80,000 hours at nominal operating conditions. The PCB conformal coating provides protection against condensation and airborne particulate — critical in food processing and chemical plant environments where humidity swings are frequent. The module’s thermal design relies on forced-air cooling from the IRC5 cabinet fan system; as long as cabinet filters are cleaned on schedule (every 1,000 operating hours per ABB maintenance guidelines), the DSQC626A will outlast the robot’s mechanical components.

Every unit we ship has been subjected to a functional burn-in test: powered under load for a minimum of 2 hours with DC bus voltage monitored for ripple and stability. Units that show any deviation from the ABB-specified output tolerance are rejected. What reaches your site is a module that has already proven itself under thermal stress — not a cold unit shipped straight from a shelf.

Global Express Logistics

Our dispatch hub is in Xiamen, Fujian, China — one of the country’s primary export ports with direct DHL Express and FedEx International Priority lanes to Europe, North America, Southeast Asia, and the Middle East. Here is exactly what happens after you confirm your order:

• Same-day dispatch: Orders confirmed with payment before 15:00 CST are packed, labeled, and handed to the carrier the same business day. No exceptions, no delays for internal processing.
• Packaging: Each DSQC626A is packed in anti-static foam within a double-wall corrugated carton. Fragile and ESD-sensitive labels applied. The module arrives at your site in the same condition it left ours.
• Transit times (estimated): Europe 2–4 business days via DHL Express; North America 3–5 business days via FedEx IP; Southeast Asia 1–3 business days; Middle East 3–5 business days. Times are from dispatch date, not order date.
• Tracking: AWB number sent to your email within 2 hours of carrier pickup. Real-time tracking link included.
• Customs & documentation: Commercial invoice, packing list, and HS code 853710 declaration prepared to customs standards for your destination country. We have shipped to 40+ countries without a single customs hold attributable to documentation error.
• Emergency freight: If your line is down and standard express is not fast enough, contact us directly for charter freight or hand-carry options. We have done it before.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
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