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4RB11503EJ508K
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4RB11503EJ508K
SIEMENS
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4RB11503EJ508K - 15 kVAR Power Capacitor, 480V AC, 50 Hz, 3-Phase - Siemens

Cat No. 4RB11503EJ508K
Category Capacitors
Stock In Stock
Condition Brand New, Sealed Packaging
Product Type Capacitors

In Stock — 3 Qty

Quantity Expected Delivery
3 Units 25 Business Days

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Technical Specification

SIEMENS 4RB11503EJ508K Capacitors Technical Specification

Capacitors
Duty Heavy Duty
Phase 3
Rated Voltage 480Vac
Rating Kvar 15
Type Cylinderical Type

Product Details

Siemens 4RB11503EJ508K - 15 kVAR Power Capacitor, 480V AC, 50 Hz, 3-Phase. We are dedicatedly involved in providing an excellent quality products at Electrihub.

Product Dimensions

SIEMENS 4RB11503EJ508K dimensions and weight

Dimensions (L × W × H)
Length 31.1 cm
Width 11.6 cm
Height 11.5 cm
Weight
Net Weight 1.9 kg

Dimensions are approximate. For precise dimensional drawings, contact us.

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Product Overview

Siemens 4RB11503EJ508K - 15 kVAR Power Capacitor, 480V AC, 50 Hz, 3-Phase. We are dedicatedly involved in providing an excellent quality products at Electrihub.

Frequently Asked Questions for 4RB11503EJ508K

Yes. RAS Electrihub Private Limited operates as an ISO-certified organization, ensuring quality sourcing, authentic products, and standardized procurement and delivery processes.
Yes. RAS Electrihub Private Limited issues GST-compliant invoices and also supports PO-based invoicing for businesses, contractors, and organizations across India.
Yes. RAS Electrihub Private Limited provides PAN India delivery with reliable logistics, safe packaging, and doorstep delivery across all states and union territories.
The SIEMENS 4RB11503EJ508K is an industrial 3-phase power factor correction capacitor rated at 15.0 kVAr at 480V AC, 50 Hz. Built in a SIECAP Super Heavy Duty (SHD) Cylindrical Aluminum Can with an M12 bottom threaded mounting stud, it draws a nominal rated current of approximately 18.04 A. Engineered specifically for the Indian electrical environment, it complies rigorously with Indian Standards IS 13340 / IS 13341 as well as international standards IS/IEC 60831-1 and IS/IEC 60831-2. It carries BIS certification and is designed for continuous duty in ambient temperatures up to 55°C (Temperature Class D), accommodating ambient temperature spikes common in Indian panel enclosures. Electrihub India supplies this genuine SIEMENS unit with full manufacturer test certificates.
In Indian low voltage power distribution, the nominal line-to-line grid voltage is 415V at 50 Hz. The SIEMENS 4RB11503EJ508K is engineered specifically for 7% (189 Hz) detuned harmonic filter reactor banks on 415V, 50 Hz Indian industrial networks. Under 7% series detuning, terminal voltage rises to ~446V, making the 480V dielectric rating mandatory to prevent premature capacitor insulation failure. Under a standard 415V supply without reactors, the output derates to ~11.20 kVAr [15 × (415/480)²]. When paired with a Siemens or standard Indian 7% detuned reactor, the net stage output delivers ~13.4 to 13.5 kVAr at 415V, mitigating 5th harmonic currents. This elevated voltage ceiling protects the capacitor against continuous grid overvoltages and harmonic voltage distortion, preventing nuisance tripping, dielectric breakdown, and loss of capacitance.
The SIEMENS 4RB11503EJ508K utilizes self-healing metallized polypropylene (MPP) film with heavy zinc-alloy edge-thickened metallization and wavy-cut geometry to minimize dielectric stress and optimize current carrying capability. For fail-safe protection, it incorporates an integrated 3-phase tear-off overpressure disconnector mechanism that mechanically disconnects all internal winding elements simultaneously in the event of internal fault gas pressure buildup, preventing case explosion or rupture. Furthermore, as mandated by Indian standards, it includes pre-fitted ceramic discharge resistor modules that safely bleed down residual voltage from peak to less than 50V within 60 seconds of de-energization, ensuring complete operator safety during panel maintenance.
Integrating the SIEMENS 4RB11503EJ508K into Automatic Power Factor Correction (APFC) panels enables Indian industrial and commercial facilities to achieve near-unity power factor (0.98 to 0.999), directly eliminating severe DISCOM low-power-factor surcharges and maximizing kVAh billing incentives enforced by state utilities (such as MSEDCL, TANGEDCO, UPPCL, BESCOM, and Torrent Power). For reliable switching, each 4RB11503EJ508K step must be controlled via dedicated capacitor-duty contactors with pre-charging damping resistors (such as Siemens 3TS series or Schneider TeSys LC1D•K) or thyristor switching modules for high-speed dynamic loads. APFC panel builders should ensure minimum 30 mm phase-to-phase separation, vertical mounting orientation, and adequate louvers or exhaust fans to keep internal enclosure temperatures within allowable limits.
Electrihub India (electrihub.in) is India's leading specialized B2B electrical e-commerce platform for genuine switchgear, power quality, and automation products. When sourcing the SIEMENS 4RB11503EJ508K through Electrihub India, buyers receive 100% brand-new, factory-sealed products directly traceable to authorized manufacturer channels, backed by full manufacturer warranty. Electrihub India provides GST-compliant tax invoices enabling full input tax credit (ITC) claims, competitive wholesale B2B pricing, in-house technical sizing assistance for APFC systems, and pan-India express doorstep delivery across all industrial hubs including Delhi-NCR, Mumbai-Pune, Chennai, Bengaluru, Ahmedabad, Hyderabad, and Kolkata.

Reviews & Ratings

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Travis Patel Sep 18, 2026

Capacitors are vulnerable to casing dents and damaged terminal studs during freight, but Electrihub packed this SIEMENS 4RB11503EJ508K with heavy-duty shock absorption and custom corrugated reinforcement. Arrived in mint condition with zero transit wear. Tracking was prompt and accurate from warehouse dispatch to delivery.

Noah Robinson Sep 18, 2026

Purchased the 4RB11503EJ508K capacitor from Electrihub.com after verifying their switchgear catalog. The physical casing, grounding stud, and terminal construction confirm genuine SIEMENS manufacturing. Very pleased with the authenticity and professional supply chain handling.

Felix Braun Sep 18, 2026

Finding reliable pricing on genuine SIEMENS switchgear components is tough, but Electrihub offered very competitive commercial terms on the 4RB11503EJ508K. The entire checkout process was streamlined, GST/commercial invoicing was automated, and customer service promptly confirmed dispatch. Will certainly reorder for upcoming projects.

Tushar Mehta Sep 18, 2026

Proper cushioning and reinforced strapping ensured our SIEMENS 4RB11503EJ508K order arrived without any terminal bending or leakage. Electrihub.in has set a high benchmark for delivering heavy switchgear products safely across India.

Vinod Bansal Sep 18, 2026

Our electrical contracting team installed five units of SIEMENS 4RB11503EJ508K purchased from Electrihub India. The discharge resistors functioned as specified, quickly dropping residual voltage below 50V within a minute of de-energizing. Great product for panel safety.

Santosh Iyer Sep 18, 2026

Installed this SIEMENS 4RB11503EJ508K capacitor in our textile unit's main distribution board. Sourced directly via Electrihub India to replace older degraded capacitors. Electrical losses are minimal, and our plant power factor immediately improved. Outstanding electrical performance from SIEMENS.

Ravindra Mishra Sep 18, 2026

Local switchgear stockists were quoting a 3 to 4-week delivery timeline for SIEMENS 4RB11503EJ508K. Found ready stock on Electrihub India and received delivery within 48 hours. Moreover, the B2B GST tax invoice was generated instantly with full input tax credit claim. Outstanding service from Electrihub.in.

Suhas Singh Sep 18, 2026

Verified the batch number and manufacturing date on this 4RB11503EJ508K upon delivery from Electrihub India. It is 100% original SIEMENS switchgear hardware. Electrihub.in is now our trusted source for certified electrical automation spares.

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