HITACHI SJ300TM 3B295619-3 – Inverter Terminal Board | SJ300 Series Platform
Engineering Background
The HITACHI SJ300 series is a high-performance general-purpose variable frequency drive (VFD) platform widely deployed across industrial automation, HVAC, pump, fan, and conveyor applications. The SJ300TM 3B295619-3 is the dedicated terminal board (control I/O interface card) for SJ300TM-frame drives, providing the critical signal routing layer between the drive’s main control board and external field wiring.
Product Positioning
Designed for maintenance engineers and procurement specialists sourcing OEM-equivalent replacement parts, this terminal board restores full drive functionality without requiring complete drive replacement. It is the preferred solution for minimizing downtime in production-critical environments where SJ300-series drives are already installed.
Complete Technical Specifications
| Manufacturer | HITACHI Industrial Equipment Systems Co., Ltd. |
| Part Number / SKU | SJ300TM 3B295619-3 |
| Component Type | Inverter Terminal Board (Control I/O Interface Card) |
| Compatible Drive Series | HITACHI SJ300 Series (SJ300TM frame) |
| Function | Signal terminal routing, analog/digital I/O interface, control wiring termination |
| Country of Origin | Japan |
| Weight | 660 g (net) |
| Condition | New / Surplus New / Tested Used (specify at inquiry) |
| Warranty | 12 months from shipment date |
Proven Application Environments
- Industrial pump and fan VFD systems using HITACHI SJ300 drives
- HVAC building automation with SJ300TM-frame inverters
- Conveyor and material handling lines requiring precise speed control
- Compressor and blower control panels in process industries
- Maintenance replacement in existing SJ300 drive installations
- OEM machine builders standardized on HITACHI SJ300 platform
Engineering Advantages
- OEM-Identical Fit: Direct plug-in replacement for SJ300TM frame drives — no modification required
- Signal Integrity: Maintains original analog/digital I/O specifications, preserving drive tuning parameters
- Downtime Reduction: Board-level replacement is faster and more cost-effective than full drive swap
- Verified Compatibility: Cross-referenced against HITACHI SJ300 service documentation
- Quality Assurance: Each unit inspected and function-tested prior to shipment
System Architecture & Signal Flow
The SJ300TM 3B295619-3 terminal board interfaces directly with the SJ300 main control PCB via a dedicated connector harness. It routes:
- Analog Inputs: Frequency reference signals (0–10 V / 4–20 mA)
- Digital Inputs: Run/Stop, Forward/Reverse, multi-speed select, fault reset
- Digital Outputs: Drive status relay outputs (fault, run, frequency-agree)
- Communication: RS-485 Modbus terminal access points (model-dependent)
- Ground & Shield: Dedicated PE and signal shield termination points
Proper reinstallation requires following HITACHI SJ300 service manual wiring diagrams. Konmask technical support can provide documentation upon request.
Sourcing & Quality Verification
- Sourced from authorized HITACHI distributors and verified surplus channels
- Each unit undergoes visual inspection, connector integrity check, and functional verification
- Serialization and date codes recorded for full traceability
- Anti-static packaging with humidity indicator card for safe transit
- Certificate of conformance available upon request for regulated industries
Procurement Process
- Confirm Compatibility: Verify your drive’s nameplate shows SJ300TM frame and part number 3B295619-3
- Request Quote: Contact [email protected] with quantity and required delivery timeline
- Order Confirmation: Receive proforma invoice with lead time and shipping options
- Payment & Dispatch: Orders dispatched within 1–3 business days of payment confirmation
- Tracking & Support: Full shipment tracking provided; technical support available post-delivery
Technical FAQ
Q: Is this board compatible with all SJ300 frame sizes?
A: This specific part number (3B295619-3) is designed for the SJ300TM frame. Please confirm your drive’s frame designation before ordering.
Q: Can I replace only the terminal board without replacing the entire drive?
A: Yes. The terminal board is a field-replaceable unit. Replacement requires basic electronics handling skills and adherence to HITACHI’s service procedures.
Q: Do you provide installation documentation?
A: Yes. HITACHI SJ300 service manual excerpts and wiring diagrams are available upon request from [email protected].
Q: What is the lead time for bulk orders?
A: Standard stock orders ship within 1–3 business days. For bulk quantities (>5 units), please contact us for availability and lead time confirmation.
Q: Is the unit tested before shipment?
A: Yes. All units are inspected and function-verified prior to dispatch. A 12-month warranty is included.
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