Sr. Mechanical Design Engineer | Power Electronics Products & Systems

Role Purpose

Design and deliver robust, thermally efficient, and manufacturable mechanical solutions for power electronics products and systems, ensuring reliability, safety, serviceability, and compliance across indoor and outdoor deployments.

Key Responsibilities

- Mechanical Architecture & Enclosure Design
- Design product and system-level mechanical architecture for:

- Solar inverters (string & central)
- PCS & BESS containers
- EV chargers (AC/DC)
- Electrolysers & power supply cabinets

Develop enclosures, cabinets, skids, and container layouts.Ensure IP protection, corrosion resistance, and environmental robustness. Thermal & Cooling DesignDesign thermal management solutions:
- Forced air cooling
- Liquid cooling (cold plates, heat exchangers)

Perform thermal simulations (CFD) and support validation.Optimize airflow paths, heat sink design, and component placement. Structural & Mechanical AnalysisPerform structural analysis for:
- Static & dynamic loads
- Transportation & seismic conditions

Ensure compliance with wind, seismic, and shock/vibration requirements.Design for safe lifting, handling, and installation. Integration with Electrical & Control SystemsCoordinate with electrical and control teams on:
- Component placement & clearances
- Cable routing and bending radius
- EMI shielding & segregation

Ensure creepage, clearance, and safety requirements are mechanically supported. DFM, DFA & IndustrializationDesign for manufacturability, assembly,



and serviceability.Select materials and finishes considering cost, durability, and environment.Support prototype builds, NPI, and production ramp-up.Drive cost reduction and weight optimization initiatives. Testing, Validation & ComplianceSupport mechanical and environmental testing:
- Thermal cycling
- IP / ingress tests
- Vibration & shock tests

Support certification to IEC, UL, and ISO standards.Resolve mechanical field issues and drive corrective actions. Documentation & Configuration ControlPrepare and maintain:
- 3D models & 2D drawings
- BOMs & assembly instructions
- Installation and service manuals

Ensure proper revision and change management.
Key KPIs

- Thermal performance & reliability
- First-pass build success
- Cost & weight targets
- Field failure rate

Education & Experience

- BE / BTech in Mechanical Engineering
- 5–12+ years in mechanical design for power electronics or industrial equipment
- Experience in Enclosure & cabinet design,
- Robust understanding in Thermal management & CFD, Structural analysis
- CAD tools (Creo, SolidWorks, NX)
- DFM/DFA principles

Preferred Industry Background

- Solar inverter OEMs
- PCS / BESS system manufacturers
- EV charging infrastructure
- Industrial power electronics

Preferred Experience

Worked on 30+ kW-level converters for EV chargers, ESS, solar inverters, onboard chargers.

Knowledge of automotive ISO 26262, IEC 61800, IEC 61000 standards (preferred).

Exposure to SiC/GaN based systems. Experience with FPGA or RTOS is a plus.

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📌 Sr. Mechanical Design Engineer (India)
🏢 Larsen and Toubro
📍 India