Shrink your panel footprint and unlock copper savings with ABB’s SACE Tmax XT platform.
When every millimetre in your LV switchboard counts, the ABB XT1B 160 TMD 63–630, 4-pole, fixed MCCB delivers reliable protection in a compact body. Its XTraordinary current-limiting characteristics help reduce thermal stress and enable smarter busbar layouts—translating to potential copper savings and faster builds.
Why “Compact” Matters in Real Panels
- More feeders per column: Smaller devices mean tighter vertical pitch and better use of riser space.
- Straighter runs, fewer bends: Front bolt terminals let you approach directly, cutting busbar/cable detours.
- Lower thermal stress: Limiting characteristics reduce let-through energy, easing hot-spot risk in dense sections.
- Accessory ecosystem: One platform for metering/communication and safety accessories helps keep panels clean and modular.
XT1B at a Glance (Specs Snapshot)
| Brand | ABB |
|---|---|
| Platform | SACE Tmax XT |
| Type | Moulded Case Circuit Breaker (Automatic) |
| Version | F (Fixed), 4-pole, front bolt terminals |
| Frame / Rated Current | Iu 160 A / In 63 A (TMD) |
| Setting Range (TMD) | 44.1…63 A |
| Operating Voltage | Up to 690 V AC / 500 V DC |
| Insulation / Impulse | Ui 800 V / Uimp 8 kV |
| Frequency | 50 / 60 Hz |
| Ics / Icu (AC) | 220–240 V: 25/25 kA; 380–415 V: 18/18 kA; 440 V: 11.25/15 kA; 500 V: 8/8 kA; 525 V: 6/6 kA; 690 V: 3/3 kA |
| DC Breaking (250 V) | 2 poles in series: 18/18 kA (Ics/Icu) |
| Instantaneous Setting (Ii) | 630 A (Level B) |
| Opening Time | CB with SOR: 30 ms; CB with UVR: 30 ms |
| Power Loss | 4.3 W per pole at rated conditions |
| Terminals | M6 bolt, tightening torque 6 N·m |
| Busbar Capacity | 45.5 … 80 mm² (main circuit) |
| Dimensions (W × H × D) | 101.6 × 130 × 70 mm |
| Weight | 1.4 kg |
| Durability | Electrical 8,000 ops (≤120/h); Mechanical 25,000 ops (≤240/h) |
| Standard | IEC 60947-2 |
Part IDs: Catalog Description: XT1B 160 TMD 63-630 4p F F · Product ID: 1SDA066816R1 · EAN: 8015644007232
Quick Footprint Math (What You Actually Gain)
- Frontal area: 101.6 mm × 130 mm = 13,208 mm² (~132.08 cm²)
- Device volume (approx.): 101.6 × 130 × 70 mm = 924,560 mm³ (~0.925 L)
These compact proportions help you tighten vertical spacing and fit more outgoing ways within the same column, especially in risers and narrow wall-mount enclosures.
How XT Current-Limiting Can Unlock Copper Savings
ABB’s XTraordinary limiting characteristics reduce the peak fault current and let-through energy the downstream conductors “see.” In practical terms, this can enable shorter, straighter busbar runs and, depending on your coordination study, the opportunity to optimize bar cross-section or layering.
Engineer’s Checklist (Use in Your Design File)
- Fault level at MCCB location: calculate prospective short-circuit (kA) for each bus section.
- Let-through data: pull the XT1B TMD I²t / peak-let-through curves (datasheet/curve link: [Information Not Provided]).
- Thermal & mechanical checks: verify busbar temperature rise and electrodynamic forces with the limited current values.
- Bar sizing decision: confirm if your standard allows a reduction or fewer laminations based on verified limits.
- Layout pass: use front terminals to eliminate offsets and reduce total copper length; re-measure bend allowances.
- Selectivity and back-up: validate Ics/Icu and discrimination with upstream devices before freezing the BOM.
Note: Copper “savings” depend on your network fault levels, temperature rise criteria, and accepted standards. Always base decisions on official ABB curves and your project’s calculations.
Layout Ideas for Tight Panels
- Direct approach busbars: front bolt terminals simplify straight stabs and reduce bridge pieces.
- 4-pole neutrality: full pole isolation (4P) helps with clean neutral switching in mixed-supply boards.
- Accessory planning: pre-define trip/aux/UVR/SOR positions to keep internal wiring harnesses short.
- Thermal zoning: group higher dissipation ways away from cable entry points; XT1B’s per-pole loss is 4.3 W at rated conditions.
- Serviceability: maintain torque access (6 N·m on M6) with clear wrench swing to keep maintenance quick.
FAQs
Will the XT1B fit my existing column spacing?
Its compact body (101.6 × 130 × 70 mm) is designed for dense boards. Check your vertical pitch and door clearance to confirm.
Can I use it on DC feeders?
Yes. Operational voltage up to 500 V DC. DC breaking at 250 V (two poles in series) is 18 kA (Ics/Icu). Verify coordination for your application.
What helps achieve copper savings?
Current-limiting characteristics plus front-terminal geometry. Use ABB’s let-through curves with your fault study to justify any bar optimization.
Ordering & Identification
| Catalog Description | XT1B 160 TMD 63-630 4p F F |
|---|---|
| Product ID | 1SDA066816R1 |
| EAN | 8015644007232 |
| Datasheet | [Against Request] |
| Country of Origin | India |
Need a Compact Breaker for a Tight Panel?
WhatsApp us for pricing, stock and lead times. We’re channel partners of ABB, Eaton Bussmann, and SECURE Meters with a 100% customer satisfaction record. Delivery all over India. Share your SLD and constraints—we’ll suggest accessories and help optimize your layout for space and copper.
