Alternator Mecc Alte 4.1 KVA S16W-105/A Single Phase 3000 RPM

Mecc Alte S16W-105 Alternator — 4.1 kVA, single-phase, 3,000 RPM

The S16W-105 It is the third model in Mecc Alte's single-phase 3,000 RPM range, with a rated power of 4.1 kVA at 50 Hz. It is part of the S16W series, which offers five models ranging from 2.5 to 5.7 kVA, all brushless with internal capacitor regulation. Designed for compact generator sets with a 3,000 RPM engine where compact size and low weight are critical factors.

The S16W series is brushless: no brushes, no commutators, and no moving contacts. It does not require regular maintenance of these components. Voltage regulation is achieved through a capacitor built into the alternator itself.

Technical characteristics

Rated power (50 Hz): 4.1 kVA / 4.1 kW (power factor 1)
Output voltage: 230 V single-phase
Frequency: 50 Hz
Speed: 3,000 RPM
Phases: 1
Excitation type: regulation via built-in capacitor (20 µF)
THD: less than 6%
Full-load performance (cos φ = 1): 76%
Technology: brushless, no brushes or commutators, maintenance-free
Protection rating: IP21 (IP23 available upon request)
Insulation class: H
Impregnation: tropicalized epoxy resin, resistant to high-humidity environments
Housing: high-strength die-cast aluminum alloy
Shaft: C45 steel with open-style fan
Sound level: 56 dBA at 7 m / 72 dBA at 1 m
Maximum operating temperature: 40°C at altitudes below 1,000 m
Weight: 17.7 kg
Country of manufacture: Italy

Certifications: EN 60034-1, IEC 34-1, VDE 0530, BS 4999-5000, NF 51.111
Directives: 2006/42/EC, 2006/95/EC, 2004/108/EC
Electromagnetic compatibility: EN 61000-6-3, EN 61000-6-1

Complete S16W Series

S16W-90: 3.5 kVA, 16.1 kg
S16W-105: 4.1 kVA, 17.7 kg (this product)
S16W-130: 5 kVA, 21 kg
S16W-150: 5.7 kVA, 23.7 kg

Available coupling options

B9 — Bevel shaft coupling in B9 configuration.

J609a — Bevel shaft coupling, model J609a.

J609b — Larger-diameter bevel shaft coupling, model J609b. Suitable for motors with a larger coupling flange.

Free-hub kit (B3B14) — Allows for pulley-and-belt mounting for motors without a bevel gear, compatible with previous models.

Dimension drawings for each coupling are available in the "Manuals" section of this page.

FAQ

Does the S16W-105 require any external capacitors?
No. The 20 µF excitation capacitor is built into the alternator and comes pre-installed. You do not need to purchase or install any additional components.

What type of coupling do I need?
It depends on the motor to which you will be mounting the alternator. Types B9, J609a, and J609b are bevel shaft couplings for direct mounting, with different shaft and flange dimensions. The free-shaft kit is for belt and pulley drive. If you have any questions, please contact us with the exact motor model before placing your order.

How often should maintenance be performed?
Since it is brushless, there are no brushes, commutators, or moving contacts to check. Maintenance is limited to cleaning the exterior and periodically checking the connections and bearings, following the intervals specified in the manual.

Can I use this alternator to power inductive loads?
Capacitor-based regulation is less responsive to sudden inductive loads than AVR electronic regulation. It is suitable for typical resistive and mixed loads. If your application involves frequent starts of high-power motors, please consult our technical team before selecting a model.