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4RB12503EE508K
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4RB12503EE508K
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SIEMENS
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4RB12503EE508K - 25 kVAR Power Capacitor, 440V AC, 50 Hz, 3-Phase - Siemens

Cat No. 4RB12503EE508K
Category Capacitors
Stock In Stock
Condition Brand New, Sealed Packaging
Product Type Capacitors
Please contact us for the exact delivery timeline

In Stock — 32 Qty

Quantity Expected Delivery
32 Units 25 Business Days

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Technical Specification

SIEMENS 4RB12503EE508K Capacitors Technical Specification

Capacitors
Duty Heavy Duty
Phase 3
Rated Voltage 440Vac
Rating Kvar 25
Type Cylinderical Type

Product Details

Siemens 4RB12503EE508K - 25 kVAR Power Capacitor, 440V AC, 50 Hz, 3-Phase. We are dedicatedly involved in providing an excellent quality products at Electrihub.

Product Dimensions

SIEMENS 4RB12503EE508K dimensions and weight

Dimensions (L × W × H)
Length 29 cm
Width 13.2 cm
Height 13.1 cm
Weight
Net Weight 2.4 kg

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

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Product Overview

Siemens 4RB12503EE508K - 25 kVAR Power Capacitor, 440V AC, 50 Hz, 3-Phase. We are dedicatedly involved in providing an excellent quality products at Electrihub.

Frequently Asked Questions for 4RB12503EE508K

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 4RB12503EE508K is an industrial 3-phase power factor correction capacitor rated at 25.0 kVAr at 440V 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 32.8 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 4RB12503EE508K is one of the most widely specified APFC panel stages in India, rated for 415V/440V, 50 Hz heavy industrial loads. It delivers dependable displacement power factor correction to help Indian HT/LT industrial consumers maintain unity power factor (0.99) and avoid DISCOM kVAh tariff penalties. Operating on Indian nominal 415V lines, it delivers ~22.26 kVAr of reactive power [25 × (415/440)²] at a current of ~31 A. It withstands frequent switching cycles and short-term overvoltages up to 10% above rated voltage as per IS 13340. 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 4RB12503EE508K 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 4RB12503EE508K 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 4RB12503EE508K 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 4RB12503EE508K 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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Jesse Martin Sep 18, 2026

We verified the serial numbers and factory markings on the 4RB12503EE508K upon delivery. It is 100% genuine SIEMENS hardware. Electrihub.com made international procurement easy, providing commercial invoices, packing lists, and proper compliance certificates for our engineering files.

Bobby Cooper Sep 18, 2026

Great commercial experience. Local vendors had a multi-week backorder on this SIEMENS 4RB12503EE508K capacitor, but Electrihub had units ready to ship on their .com site. Prompt support, fair bulk pricing, and top-tier industrial components delivered right to our receiving dock.

Lukas Evans Sep 18, 2026

The terminal block on this SIEMENS 4RB12503EE508K is well engineered — handled our 16mm² flexible copper cables without any terminal spreading or thread stripping. Paired it with our contactor bank and it switched in smoothly without any inrush issues. Another solid buy from Electrihub.

Ronald Myers Sep 18, 2026

Ordered two units of SIEMENS 4RB12503EE508K via Electrihub.com. Given the weight of industrial capacitors, packaging quality is critical. Electrihub used heavy-duty strapping and dense foam liners. Excellent logistics execution and great customer communication throughout shipping.

Mukesh Agarwal Sep 18, 2026

We ordered the 4RB12503EE508K capacitor from Electrihub India for our machine shop in an industrial area. It handles continuous fluctuating inductive loads without heating up. Our reactive power charges have vanished on the latest electricity bill. Very happy with the purchase from Electrihub.in.

Manpreet Grover Sep 18, 2026

As an electrical maintenance head, counterfeit components are my biggest headache. Electrihub India delivered authentic SIEMENS 4RB12503EE508K units with original factory labeling and test compliance. Genuine e-commerce platform for industrial switchgear.

Vikram Kapoor Sep 18, 2026

Proper cushioning and reinforced strapping ensured our SIEMENS 4RB12503EE508K order arrived without any terminal bending or leakage. Electrihub.in has set a high benchmark for delivering heavy switchgear products safely across India.

Related Categories

Power Monitoring & PF Correction Active Harmonic Filter APFC Capacitors Detuned Filter Reactor Digital Meters Digital Meters Accessories Thyristor Switch Module

Tags

# 4RB12503EE508K # 25 kVAR # Power Capacitor # 440V AC # 50 Hz # 3-Phase # Siemens # Siemens 4RB12503EE508K # Electrihub
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