Two Industry Leaders
Stamford (Newage) and Leroy Somer are the two most widely used alternator brands in diesel generator sets worldwide. Both produce high-quality products, but there are differences that matter when sourcing spare parts.
Stamford Alternators
Key Series
- P0 series — 20-70 kVA (single bearing)
- P1 series — 50-150 kVA (single bearing)
- PI series — 100-300 kVA (single bearing)
- HCI series — 200-2000+ kVA (brushless)
Parts Availability
Stamford parts are widely available globally. Common AVRs (SX460, MX341, MX321) are among the most stocked alternator parts in the industry.
Leroy Somer Alternators
Key Series
- LSA 42 — 30-100 kVA
- LSA 44 — 80-200 kVA
- LSA 46 — 150-400 kVA
- LSA 49/50/52/54 — 300-3000+ kVA
Parts Availability
Leroy Somer uses R-series AVRs (R438, R448, R450). Parts are available but may have longer lead times in some regions.
Comparison
| Feature | Stamford | Leroy Somer |
|---|---|---|
| Market share | Higher (especially Asia/ME) | Strong (Europe/Africa) |
| AVR types | SX/MX/AS series | R series |
| Parts availability | Excellent globally | Good, regional variation |
| Diode compatibility | Standard | Proprietary |
Conclusion
Both brands are excellent choices. Parts availability for both is good, but Stamford tends to have broader global availability for common components. Browse our alternator parts range.