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This is a Schneider Electric ComPacT NSX series disjuntor em caixa moldada (MCCB) for power distribution protection.
New standard order number: C25N3TM160
Obsolete old order number: LV431832
Compliant with IEC 60947‑2 and GB/T 14048.2 padrões.
- Basic Rated Core Parameters
| Item | Valor |
| Tipo | Low‑voltage MCCB for power distribution protection |
| Frame rating | 250UM |
| Poloneses | 3P (3 postes, all protected) |
| Rated current In | 160UM (continuous at 40℃) |
| Rated operational voltage Ue | 690Vca 50/60 Hz, suitable for 380V/400V/415V systems |
| Rated insulation voltage Ui | 800V e |
| Rated impulse withstand voltage Uimp | 8kV |
| Freqüência | 50/60Hz |
| Utilization category | Type A (no short‑time delay, general distribution) |
| Isolation function | Certified isolating function per IEC 60947‑2 |
- Short‑Circuit Breaking Capacity
| Tensão do sistema | Rated ultimate shortircuit breaking capacity Icu | Rated service shortircuit breaking capacity Ics |
| 415V e | 50o | 50o (100% UTI, reusable after breaking) |
| 500V e | 36o | 36o |
| 690V e | 10o | 10o |
Rated short‑time withstand current Icw (1é): 12kA at 415V AC
- TMD Thermal‑Magnetic Release Characteristics
Standard TMD thermal‑magnetic release, LI protection (long‑time overload + instantaneous short‑circuit).
- Long‑time overload thermal protection
Ir setting range: 0.7–1×In (112A–160A)
Characteristic: 120–400s at 1.5×Ir; ≤15s at 6×Ir (standard inverse time)
- Short‑circuit instantaneous magnetic protection
Instantaneous current Ii: fixed at 1250A
Operating time: ≤20ms
- Mecânico & Installation Parameters
| Item | Valor |
| Dimensões (L×A×P) | 105mm × 161mm × 86mm |
| Standard mounting centers | Vertical 125mm × Horizontal 35mm |
| Montagem | Fixo, front connected; horizontal/vertical, no derating |
| Wiring capacity | Up to 70mm² copper cable / busbar |
| Mechanical endurance | 20,000 operações |
| Electrical endurance | 10,000 operations at 440V AC, Em |
| Ingress protection | IP40 (body), IP54 (panel‑mounted) |
| Impact resistance | IK07 |
| Net weight | Aprox.. 2.4kg |
- Environmental & Compliance Parameters
Temperatura ambiente: -25℃ ~ +70 ℃; no derating below 40℃
Altitude: 0–2000m without derating
Grau de poluição: 3
Overvoltage category: Ii
Certificações: CCC, CE, EAC, Marinho, etc..
Accessory slots: 5 standard slots for auxiliary, alarm, shunt, liberação de subtensão, etc..
- Expansion & Compatibilidade
Can be fitted with Vigi earth‑leakage modules
Compatible with motor operators for remote control
Can add interlock, position indicator, padlock devices
Top/bottom feed both allowed without performance derating
Replacement & Notas de seleção
- Old type LV431832 is discontinued; use C25N3TM160 instead.
- For electronic release (adjustable short delay / falha de terra), upgrade to NSX250N with MicroLogic (2.2/5.0).
- Breaking ratings: H (70o), S (100o), based on short‑circuit calculation.
- Concorrentes: ABB Tmax T2, Siemens 3VT250, suitable for cross‑brand replacement.
NSX250N‑3P‑160A Direct Replacement Solutions
Core Matching Rules (100% match required)
Frame rating: 250UM (do NOT downgrade to 160A frame)
Poloneses: 3P
Corrente nominal: 160UM
Capacidade de ruptura: ≥50kA at 415V AC
Release type: thermal‑magnetic (LI characteristic)
Montagem: fixed front connection, matching panel holes
- Recommended Replacements
Cenário 1: Import Brand Direct Replacement
ABB Tmax XT3N250 TMD160/1600 FF 3P
Pedido nº.: 1SDA068266R1
Corresponder: 100%
Frame 250A, 3P, 160UM, TMG thermal‑magnetic
UTI=50kA, Ics=50kA at 415V AC
Identical dimensions and mounting holes
Full accessory compatibility
Aplicativo: foreign‑funded plants, export equipment, on‑site repair
Siemens 3VC250N TMA160 3P
Pedido nº.: 3VC2316‑2DA33‑0AA0
Corresponder: 98%
Frame 250A, 3P, 160UM, TMA thermal‑magnetic
50kA at 415V AC
Highly compatible dimensions
Aplicativo: Siemens low‑voltage systems
Cenário 2: Domestic High‑Cost‑Performance Replacement
Changshu Switch CM3‑250H/3300 160A
Corresponder: 99%
Frame 250A, 3P, 160UM, distribution type thermal‑magnetic
Icu=50kA at 415V AC
Compliant with IEC 60947‑2 / GB 14048.2
Aplicativo: industrial, building distribution, domestic projects
Chint NM8‑250N/3P 160A
Corresponder: 95%
Frame 250A, 3P, 160UM, thermal‑magnetic
50kA at 415V AC
Aplicativo: civil construction, general distribution
- Dimensões & Parameters Comparison
| Modelo | Dimensões (L×A×P) | Mounting Centers | UTI (415V) | Release | Frame |
| NSX250N‑3P‑160A | 105×161×86mm | 125mm×35mm | 50o | DTM | 250UM |
| ABB XT3N250 3P 160A | 105×161×86mm | 125mm×35mm | 50o | TMG | 250UM |
| Siemens 3VC250N 3P 160A | 105×160×85mm | 125mm×35mm | 50o | TMA | 250UM |
| CM3‑250H 3P 160A | 108×162×86mm | 125mm×35mm | 50o | Thermal‑magnetic | 250UM |
> Observação: ABB XT3N250 matches dimensions and holes 100% – best direct replacement.
- Safety Rules for Replacement
- No frame downgrade: Do NOT use 160A frame breakers (por exemplo, ABB T2N, NSX160).
- Breaking capacity ≥50kA: Do NOT use 36kA / 25kA models.
- Release matching: Use distribution‑type thermal‑magnetic only.
- Compatibilidade de acessórios: Match auxiliary, shunt, subtensão, earth‑leakage modules.
- Final Selection Guide
Direct replacement, import, no cabinet modification: ABB XT3N250 TMD160/1600 FF 3P
New project, domestic approval, cost‑effective: Changshu CM3‑250H/3300 160A
Siemens system replacement: Siemens 3VC250N TMA160 3P
