SFT Repair Services India
SFT (Soft Starter Technologies) is a German specialist in soft starter units, motor control devices, and power electronics for industrial automation. Since 1993, SFT has engineered robust soft starters and dynamic braking systems trusted across European manufacturing and increasingly in Indian automotive, steel, and cement sectors. Their compact, efficient designs reduce inrush current and mechanical stress in three-phase motor applications.
SFT (Soft Starter Technologies) is a German specialist in soft starter units, motor control devices, and power electronics for industrial automation. Since 1993, SFT has engineered robust soft starters and dynamic braking systems trusted across European manufacturing and increasingly in Indian automotive, steel, and cement sectors. Their compact, efficient designs reduce inrush current and mechanical stress in three-phase motor applications.
Synchronics Electronics has built deep expertise servicing SFT soft starters and motor control modules since 2006. Our 180+ engineers repair SFT units across India—from minor parameter resets to complex capacitor bank replacements and thyristor recalibration. We stock OEM SFT boards and components, ensuring your soft starter downtime never extends beyond 48 hours at our Vadodara facility.
Expert SFT soft starter repair and motor control thyristor diagnostics across India.
SFT Equipment We Repair — By Category
SFT Product Lines We Repair
Our engineers are trained on the full SFT product range. Below are the major product families we service.
SFT Soft Starter Units
Three-phase soft starters with integrated power electronics, thyristor bridges, and ramp control. Common repairs include thyristor firing circuit failures, power supply PCB degradation, and control logic resets after voltage transients.
SFT Dynamic Braking Modules
External braking resistor modules paired with soft starters for rapid motor deceleration. Frequent issues include resistor element burnout, braking transistor shorts, and brake control relay failures in high-cycle applications.
SFT Control & Monitoring PCBs
Embedded control boards managing ramp rates, bypass logic, fault detection, and serial communication (ModBus, Profibus). Typical faults: capacitor electrolyte leakage, optoisolator failures, and crystal oscillator drift affecting timing.
SFT Bypass Contactor Assemblies
Mechanical bypass contactors that switch soft starter output to hard-start configuration post-ramp. Repair involves contact replacement, coil rewinding, and synchronization logic verification after thermal stress events.
SFT Power Supply Units (PSUs)
24 VDC and 230 VAC auxiliary power modules feeding control circuits and solenoids. Common failures: diode bridge rectification loss, capacitor drying (>10 years age), transformer primary winding insulation breakdown.
Why Choose Synchronics for SFT Repairs?
PCB-Level Expertise
We repair down to the component level — not just swap boards. Our engineers identify root causes, replace failed IGBTs, capacitors, processors, and gate drivers on SFT equipment.
Fast Turnaround
Standard 7–10 working days. Express 3–5 days available for critical breakdowns. Emergency same-day/next-day service for unplanned downtime.
6-Month Warranty
Every repaired unit ships with a 6-month comprehensive warranty on parts and labour. Our repair success rate is over 94% across all brands.
All-India Service
Couriered repairs accepted from any city in India. Doorstep pickup available in Vadodara, Mumbai, Pune, Ahmedabad, Surat, Chennai, and more.
Common SFT Equipment Faults We Fix
Based on 30+ years of repair data, these are the most frequent failure modes we see in SFT equipment arriving at our workshop.
- ✓Thyristor gate drive circuit failure — Gate drive optoisolators degrade due to continuous thermal cycling in high-ambient plants. Firing pulses weaken, causing asymmetrical phase switching and motor current imbalance. Common in cement mills and steel rolling operations in India where ambient temps exceed 50°C.
- ✓Power capacitor bank bulging or leakage — SFT soft starters carry large DC capacitor banks (typically 1500-3300 µF, 600 VDC) filtering the rectified mains. Electrolyte dries over 8-12 years in dusty environments; high ripple current in undersized units accelerates aging. Common in Indian textile and automotive plants with poor thermal management.
- ✓Control logic reset or fault code lock-out — Voltage spikes from switching transients or upstream SCR drives corrupt flash memory in SFT control modules. Microcontroller watchdog resets but fails to recover program execution. Plant operators see E14 or E16 fault codes and cannot clear them via control panel.
- ✓Bypass contactor fails to transition — After ramp completion, the bypass contactor should hard-start the motor for efficiency. Contact welding or arc erosion (especially under 460V systems) causes mechanical or electrical latching. Synchronics sees this frequently in Indian pump stations and compressor drives running 6000+ hours annually.
- ✓Auxiliary power supply 24 VDC dropout — SFT soft starters require clean 24 VDC for control electronics and solenoid valves. Transformer primary winding insulation failure or rectifier diode reverse leakage causes brownout. In older units (pre-2008), capacitor ripple filtering becomes inadequate, dropping rail voltage below 20 VDC under peak control current.
- ✓Ramp time acceleration or deceleration inconsistent — SFT ramp generators use RC timing networks and voltage-to-frequency converters. Component drift—particularly in timing resistors and integrator capacitors—causes ramps to overshoot or undershoot setpoint. This creates jerky motor acceleration, accelerating mechanical coupling wear in Indian paper mills and refineries.
How We Repair Your SFT Unit
Receive & Log
Your unit is logged into our tracking system with a unique job number. You receive WhatsApp / email updates at every stage.
Fault Diagnosis
Board-level diagnosis using oscilloscopes, LCR meters, and thermal cameras. Root cause identified before any repair begins.
Component Repair
Faulty ICs, capacitors, MOSFETs, IGBTs, and gate drivers replaced with genuine or equivalent-spec components.
Full-Load Test
Unit tested under rated load with original or equivalent motor. All parameters verified. 6-month warranty issued.
Industries Using SFT Equipment
We serve plant maintenance teams across all major industries where SFT automation is deployed.
Frequently Asked Questions — SFT Repairs
Do you repair SFT equipment anywhere in India?+
Yes. Synchronics repairs the complete SFT soft starter and motor control range across all of India. We offer pan-India door pickup from Mumbai, Delhi, Pune, Chennai, Hyderabad, Ahmedabad, Bangalore, and all major industrial cities. Units are serviced at our Vadodara, Gujarat headquarters with 24-48 hour turnaround for most repairs, and returned fully insured.
What is the typical cost of repairing an SFT soft starter versus replacement?+
SFT soft starter repairs typically cost 30-50% of new unit price. Common repairs—thyristor gate drive board replacement, capacitor bank service, or bypass contactor contact replacement—run INR 12,000-28,000 depending on model and severity. Synchronics provides free diagnostics and written quotations within 2 hours of receipt. We often save Indian manufacturers 60-70% compared to imported replacement units when warranty has expired.
Can Synchronics repair SFT units that have been subject to voltage surges or lightning strikes?+
Yes. SFT soft starters are vulnerable to transient overvoltage; we see this often during monsoon season in Indian industrial zones. Synchronics performs full dielectric testing, thyristor avalanche-voltage verification, and control board flash memory recovery post-surge. We recommend installing downstream surge suppression units (SPDs) to prevent recurrence—we stock SFT-compatible varistor modules and can retrofit existing installations.
Do you stock OEM SFT replacement parts and modules?+
Synchronics maintains inventory of common SFT components: power capacitors (600 VDC, 1500-3300 µF), thyristor gate drive optoisolators, 24 VDC power supply modules, bypass contactor coil assemblies, and control PCB modules. For critical spares not in stock, we source directly from SFT German facility within 7-10 days. Emergency same-day parts dispatch available for existing customers.
What is Synchronics' warranty on SFT soft starter repairs?+
All SFT repairs carry a 12-month workmanship and parts warranty covering defects in our service. This includes thyristor functionality, capacitor aging, and control logic stability. We perform in-factory burn-in testing (72 hours operational stress) before dispatch. On-site repair warranty is available for plants with installed SFT systems—Synchronics engineers can troubleshoot and replace modules on-location with same-day turnaround.
How do I send my SFT unit for repair?+
Pack the unit securely and courier it to our Vadodara workshop. Include a note with the fault description and your contact details. We will log it into our system and WhatsApp you a job number within 24 hours of receipt. Doorstep pickup is available in Vadodara, Ahmedabad, Surat, Mumbai, and Pune.
What is the cost of repairing a SFT drive or PLC?+
Repair cost depends on the model and the fault. We offer a free diagnosis — once we identify the fault, we provide a fixed quotation before proceeding. Typical repairs cost 20–40% of the new unit price. We will never repair without your approval.
What warranty do you provide on SFT repairs?+
All repaired units carry a 6-month comprehensive warranty covering the same fault and related issues. If the fault recurs within the warranty period, we repair it free of cost.
Do you provide a no-fix, no-fee guarantee?+
Yes. If we cannot repair your SFT unit after diagnosis, you pay only the diagnosis fee (₹500–₹1,500 depending on the product). The unit is returned to you at no additional charge.
SFT Repair Catalog
Showing 1–1 of 1 SFT products
Other Brands We Repair in the Same Categories
Get Your Equipment
Back in Action — Fast
Send us your faulty industrial electronics. Our engineers will diagnose it and provide a detailed quote within 24 hours — with no obligation to proceed.
Free Evaluation
No obligation
48hr Turnaround
Fastest in India
6-Month Warranty
Every repair
No Fix, No Charge
Zero risk policy
Pan-India Pickup
Doorstep service