Description
Your AC's Compressor Costs More Than This Does.
4 KVA · 140–280 V · Copper Wound.
A stabilizer sized for a single air conditioner, and the cheapest insurance you can put in front of one · a 4 KVA rating suitable for one AC up to 1.5 ton · a genuinely wide 140 V to 280 V input range — it keeps working when the supply sags to 140 V on a hot evening and when it spikes towards 280 V afterwards · a copper wound transformer rather than aluminium: better conductivity, less heat, longer life — and the single most important thing to check on any stabilizer · durable construction built for Indian supply conditions · made in India · 2-year manufacturer warranty · from Bluebird, a specialist in voltage stabilisation
140 V
to 280 Vthe range that matters here
This is what a stabilizer is actually for, and it's worth understanding what happens without one. On a Delhi summer evening, when every AC on the street starts together, the supply voltage sags — and a compressor asked to start on low voltage draws far more current than it should, and overheats. Later at night the load drops and the voltage swings high the other way, which stresses the electronics. Both do cumulative damage, and neither is visible until the compressor fails. This unit holds the output steady across a 140 V to 280 V input swing — an unusually wide window, and precisely the range Indian supply moves through.
Copper wound — the one specification to check on any stabilizer
Most stabilizer buyers compare KVA and price. The winding matters more, and it's where cheap units cut cost. A stabilizer is essentially a transformer, and that transformer is wound with either copper or aluminium. Copper conducts better, which means less energy lost as heat for the same load. That matters because heat is what ages a transformer — an aluminium-wound unit under a 1.5-ton AC in a Delhi May runs hotter, and hot windings degrade. Copper costs the manufacturer more and it's the reason this lasts. When comparing two stabilizers at similar prices, ask which is copper wound — it's often the whole difference.
Sizing it correctly — please check before ordering
4 KVA is rated for one air conditioner up to 1.5 ton, and both halves of that matter. One AC — this is not a whole-house stabilizer, and connecting a second appliance or a fridge alongside will overload it. Up to 1.5 ton — a 2-ton unit needs a larger stabilizer. Beyond tonnage, the things that actually decide correct sizing are the AC's rated current, its compressor starting load, and what the AC manufacturer specifies; some inverter ACs have wide built-in voltage tolerance and need no external stabilizer at all. Tell us your AC's make, model and tonnage and we'll confirm whether this is the right unit — it takes a minute and avoids an expensive mistake.
🎯 Right for
Not suitable for 2-ton ACs, multiple appliances on one unit, or use as a general household stabilizer.
⚙️ At a glance
Bluebird is a specialist stabilizer manufacturer rather than a general appliance brand — voltage regulation is what they build.
A replacement AC compressor runs into many times this price, and low-voltage starting is one of the things that kills them.
Copper's lower resistance means less waste heat under load — and heat is what shortens a transformer's life.
This needs a qualified electrician, proper earthing and a correctly rated MCB — not a plug into the nearest socket.
Tell us your AC's model and tonnage before ordering and we'll confirm this is the right rating for it.
| Brand | Bluebird ✅ |
| Type | Voltage stabilizer for air conditioner ✅ |
| Power Rating | 4 KVA ✅ |
| Input Voltage Range | 140–280 V ✅ |
| Suitable For | One compatible air conditioner up to 1.5 ton ✅ |
| Transformer | Copper wound ✅ |
| Application | Voltage regulation and AC protection ✅ |
| Installation | By a qualified electrician, with proper earthing and MCB ✅ |
| Country of Origin | Made in India 🇮🇳 ✅ |
| Warranty | 2 Years manufacturer warranty ✅ |
Why buy from Mahajan Electronics?
- 📐 We check stabilizer sizing against your AC
- 100% genuine Bluebird with warranty support
- 24-hour delivery across Delhi NCR
- GST invoice — save up to 18% on business purchases
- 45+ years of trust · rated 4.7 on Google
- Raja Garden · Jail Road · Dabri Mor
Order today. Delivered in 24 hours.
Bluebird 4 KVA Voltage Stabilizer · 140–280 V Input · Copper Wound Transformer · For One Air Conditioner up to 1.5 Ton · 2-Year Warranty · Made in India
Warranty as per Bluebird's terms and conditions — 2 years manufacturer warranty, subject to T&C; coverage of the transformer winding, relay and control components, regulation circuit, cabinet, cables and accessories, parts and labour, exclusions and the service process are subject to brand policy and the final invoice or warranty documentation. Regulation performance, supported input range, electrical loss, heating and noise depend on incoming voltage, load current, compressor starting current, AC type and model, wiring condition, earthing, socket and MCB rating, ambient temperature, ventilation, installation quality and maintenance. The 4 KVA rating and suitability for one AC up to 1.5 ton are general compatibility guidance: verify the connected AC's rated current, maximum input, starting load and the AC manufacturer's own stabilizer recommendation before purchase and installation. Do not connect multiple appliances or an incompatible load. A voltage stabilizer reduces risk from fluctuations within its specified range but cannot guarantee protection against every surge, lightning strike, short circuit, wiring fault, neutral failure or voltage outside that range. Installation and electrical connection must be carried out by a qualified electrician with proper earthing, wiring, MCB protection and ventilation clearance. Do not cover the unit or install it near water, heat, direct sunlight or flammable materials. Image for reference only; actual serial number, manufacturing date, cabinet design, colour, indicator layout, cable, plug, mounting method and accessories may vary by batch.
Please Note: The image shown is for reference purposes only. Actual product details, including the serial number and manufacturing date, may vary.