Mitsubishi S-N25 Magnetic Contactor | Replacement, Equivalent & Selection Guide
The Mitsubishi Electric S-N25 is a 25A AC magnetic contactor from the S-N series, widely used in motor control centers, distribution panels, and industrial automation systems. This page provides full technical specifications, compatible replacement models, and a structured selection guide to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | S-N25 |
| Brand | Mitsubishi Electric |
| Series | S-N Series |
| Rated Current (AC-3) | 25 A |
| Motor Rating (AC-3, 400V) | 11 kW |
| Motor Rating (AC-3, 200V) | 5.5 kW |
| Main Poles | 3-pole |
| Auxiliary Contacts | 1NO + 1NC (standard) |
| Coil Voltage Options | 24V, 110V, 220V, 380V AC (50/60 Hz) |
| Insulation Class | Class B / F |
| Mechanical Life | 10,000,000 operations |
| Electrical Life (AC-3) | 1,000,000 operations |
| Mounting | DIN rail / screw mount |
| Weight | 1,240 g |
| Standards | IEC 60947-4-1, JIS C 8201-4-1 |
Compatible Replacement & Equivalent Models
The following models are commonly used as direct or functional replacements for the Mitsubishi S-N25. Always verify coil voltage and auxiliary contact configuration before substitution.
| Brand | Model | Rated Current | Compatibility Notes |
|---|---|---|---|
| Fuji Electric | SC-5-1 / SC-N5 | 25 A | Direct equivalent, same frame size |
| Schneider Electric | LC1D25 | 25 A | IEC equivalent, verify terminal pitch |
| Siemens | 3RT2026 | 25 A | Functional equivalent, DIN rail compatible |
| ABB | AF26-30-10 | 26 A | Near equivalent, check coil voltage range |
| Omron | J7KN-22 | 22 A | Close equivalent for lighter loads |
| Chint | NXC-25 | 25 A | Economy alternative, IEC rated |
Why Choose the Original Mitsubishi S-N25
- Proven reliability — Mitsubishi S-N series contactors are field-proven across decades of industrial deployment in Asia, Europe, and the Americas.
- Long mechanical life — 10 million operations ensures minimal maintenance in high-cycle applications.
- Broad coil voltage range — Available in 24V to 380V AC variants to suit diverse control circuits.
- Modular auxiliary contacts — Add-on auxiliary contact blocks (e.g., S-N11) allow flexible configuration without rewiring.
- OEM compatibility — Preferred by Japanese machine builders and widely specified in OEM documentation.
Typical Applications
- Motor starters and reversing starters (up to 11 kW / 400V)
- HVAC compressor and fan motor control
- Conveyor and pump control panels
- Machine tool and CNC auxiliary circuits
- Building automation and MCC (Motor Control Center) assemblies
- Star-delta (Y-Δ) starter configurations
System Compatibility
The S-N25 is compatible with the following Mitsubishi Electric accessories and system components:
- Thermal Overload Relays: TH-N20, TH-N20KP (direct mount)
- Auxiliary Contact Blocks: S-N11, S-N20 (add-on)
- Surge Suppressors: RC-N25 (RC snubber), SD-N25 (diode type)
- Mechanical Interlocks: S-N25MI (for reversing starter pairs)
- PLC Integration: Compatible with Mitsubishi MELSEC Q/L/iQ-R series output modules via standard 24V DC coil variant
Selection Guide
Use the following criteria to confirm the S-N25 is the right contactor for your application:
- Step 1 — Load current: Confirm motor or load current does not exceed 25A (AC-3 duty). For loads up to 18A, consider S-N18; for loads up to 35A, consider S-N35.
- Step 2 — Coil voltage: Match coil voltage to your control circuit (24V DC, 110V AC, 220V AC, or 380V AC). Specify suffix when ordering (e.g., S-N25-AC220V).
- Step 3 — Auxiliary contacts: Standard is 1NO+1NC. Add S-N11 block if additional contacts are required.
- Step 4 — Mounting: Confirm DIN rail or screw-mount panel space. S-N25 fits standard 35mm DIN rail.
- Step 5 — Environment: For harsh environments (dust, vibration), specify IP rating enclosure separately. Contactor itself is open-type.
Quality Assurance & Sourcing
All Mitsubishi S-N25 units supplied by Konmask.com are:
- Sourced from authorized distributors or verified surplus channels
- Inspected for physical integrity, label authenticity, and coil continuity before dispatch
- Shipped with original packaging where available
- Backed by our 30-day return policy for DOA (Dead on Arrival) units
We specialize in industrial automation components for B2B buyers, system integrators, and MRO procurement teams.
How to Order
- Online: Add to cart directly on this page — specify coil voltage in the order notes if required.
- Bulk / OEM inquiry: Email support@konmask.com with quantity, required coil voltage, and delivery timeline.
- Phone / WhatsApp: +0086 19859288691
- Lead time: In-stock units ship within 1–3 business days. Special configurations may require 5–10 business days.
Replacement & Compatibility FAQ
Q: Can I replace an S-N25 with a Schneider LC1D25?
A: Yes, functionally. Both are 25A IEC contactors. Verify coil voltage, terminal pitch, and auxiliary contact layout before installation.
Q: What is the difference between S-N25 and S-N25H?
A: The S-N25H is a high-capacity variant with enhanced thermal performance for higher ambient temperatures or frequent-start duty cycles.
Q: Is the S-N25 compatible with Mitsubishi FR-E700 / FR-D700 inverters?
A: Yes, as an input-side isolation contactor. Do not use it on the output side of a VFD.
Q: Can I add a 24V DC coil version for PLC control?
A: Yes. Order the S-N25 with DC24V coil suffix. Confirm with your PLC output module’s current sourcing capacity (typically 100–200 mA per output).
Q: What overload relay pairs with the S-N25?
A: The TH-N20 or TH-N20KP thermal overload relay mounts directly onto the S-N25 without additional brackets.
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