ABB MCCB 1SDA050999R1

Technical Specifications and Application Guide for ABB MCCB 1SDA050999R1

Model Explanation

Model Part	Description
1SDA050999R1	Unique global product code for ABB SACE Tmax T series molded case circuit breaker
T2S	Product series: Tmax T2 series; S stands for standard breaking capacity (50kA)
160	Frame rated current: 160A
TMD	Trip unit type: Thermal-magnetic trip unit, D-curve (motor protection type)
50-500	Trip unit rated current range: 50A (rated), 500A (instantaneous trip value)
3p	Number of poles: 3 poles
F F	Mounting: Fixed; Connection: Front connection

Key Parameters

Electrical Parameters

Item	Value
Rated operational voltage (Un)	400V AC (50/60Hz), 690V AC optional
Rated insulation voltage (Ui)	690V AC
Rated impulse withstand voltage (Uimp)	8kV
Rated current (In)	50A (adjustable range 50–500A)
Frame rated current (Icu)	160A
Breaking capacity	50kA (415V AC), 36kA (690V AC)
Short-time withstand current (Icw)	16kA (1s)
Trip curve	Type D, compliant with IEC 60947-2
Thermal trip range	50–500A (adjustable)
Magnetic trip range	5–10In (adjustable)
Rated frequency	50/60Hz compatible

Mechanical Parameters

Item	Value
Operation mode	Manual (standard), motor operation optional
Mechanical endurance	10,000 operations (at rated)
Electrical endurance	1,000 operations (rated short-circuit breaking)
Degree of protection	IP30 (compliant with IEC 60529)
Terminals	Front connection, suitable for cable cross-section: 16–70mm²
Mounting	Fixed, standard 35mm DIN rail mounting

Mounting Dimensions

Item	Value (mm)
Width	90
Height	150
Depth	105
Mounting hole pitch	Standard 35mm DIN rail
Terminal spacing	Compliant with IEC standards, suitable for standard cable connections

Application Notes

4.1 Selection Guidelines

Suitable for motor protection and general industrial power distribution systems, especially where D-curve tripping is required

Derate when ambient temperature exceeds 40°C: 1% per °C rise; max operating temperature 60°C

Derate at altitudes above 2000m: 1% per 100m rise; max altitude 4000m

Select appropriate trip setting current according to actual load, ensuring I_load ≤ In ≤ I_cable

4.2 Installation Requirements

Ensure breaker is OFF and voltage-free with multimeter before installation

Mount on 35mm standard DIN rail, ensure firm fixing to avoid vibration effects

Tighten terminals with suitable torque (recommended 6N·m) to prevent overheating from poor contact

Keep sufficient heat dissipation space: at least 50mm clearance around the breaker

Avoid installation in damp, dusty, corrosive gas or heavy vibration environments

4.3 Operation and Maintenance

Inspect mechanical operating mechanism regularly (annually recommended) to ensure smooth ON/OFF

Test tripping function regularly (semi-annually recommended) to ensure reliable protection

Clean surface with dry soft cloth; avoid chemical cleaners

Record operation count; replace before reaching mechanical endurance

After short-circuit interruption, check breaker condition and replace if necessary

Troubleshooting

Fault Symptom	Possible Causes	Solutions
Fails to close	1. Undervoltage trip not powered	1. Check control power supply
	2. Mechanical jamming	2. Operate manually several times to clear jam
	3. Trip unit fault	3. Replace trip unit module
Frequent tripping	1. Overload	1. Check load current
	2. Short circuit	2. Troubleshoot short circuit
	3. Improper trip setting	3. Reset trip settings
	4. Loose connection causing heating	4. Check and tighten terminals
Contact ablation	1. Long-term overload	1. Replace with higher-rated breaker
	2. Insufficient breaking capacity	2. Upgrade to higher breaking capacity model
	3. Excessive operating frequency	3. Reduce operation frequency or replace suitable model
Trip unit does not operate	1. Trip unit damaged	1. Replace trip unit
	2. Incorrect wiring	2. Check wiring correctness
	3. Excessively low ambient temperature	3. Improve ambient temperature or select low-temperature model
Motor operation mechanism fails	1. Control voltage below 85% Un	1. Check control power supply
	2. Limit switch not reset	2. Manually reset limit switch
	3. Motor fault	3. Replace operating mechanism motor

Brand Replacement Solutions

6.1 ABB Alternative Models

Upgrade model: XT2S 160 TMA 50–500 3p F F (1SDA067555R1), Tmax XT series, higher performance, compatible mounting dimensions

Economic alternative: Formula A1B 125 TMF 50–500 3p F F (1SDA066702R1), lower cost, same basic protection functions

6.2 Competitive Brand Equivalents

Brand	Replacement Model	Main Differences
Schneider	CVS160F TMD50 3P 50kA	Same breaking capacity, slight dimension difference, consistent trip curve
Siemens	3VL160 50A 3P TMD	Same frame current, 50kA breaking capacity, different operating mechanism design
Chint	NM1-160S/3300 50A	Domestic alternative, cost-effective, basic functions consistent
Delixi	CDM1-160S/3300 50A	Domestic alternative, high cost-performance, compliant with IEC standards

Detailed Mounting Dimensions for ABB MCCB 1SDA050999R1

Basic Model and Mounting Type Confirmation

Full Model: ABB SACE Tmax T2S 160 TMD50–500 3p F F (1SDA050999R1)

Mounting type: Fixed (F), front connection (F)

Poles: 3 poles (3p)

Series: Tmax T series (not XT upgraded series)

Core Mounting Dimensions (Unit: mm)

Item	Value	Remarks
Width (W)	90	Standard 3-pole width, DIN rail compatible
Height (H)	130	Including operating handle, fixed standard height
Depth (D)	70	Standard depth for fixed front connection, excluding terminal extension
Mounting	Standard 35mm DIN rail	Compliant with IEC 60715, snap-in mounting
Mounting hole pitch	For 35mm DIN rail	Rail thickness 1.0–1.5mm compatible
Terminal spacing	Phase spacing 25mm, N-line spacing 25mm	Standard wiring, suitable for 16–70mm² cable
Terminal height	45mm	From rail plane to top of terminals
Handle height	130mm	From rail plane to top of handle
Net weight	1.12kg	Without packaging

Detailed Dimension Diagram Description

3.1 Front View Dimensions

Total width: 90mm (3-pole)

Total height: 130mm (including handle)

Handle travel: approx. 25mm (ON–OFF difference)

Trip indicator window: 30mm from top, centered

3.2 Side View Dimensions

Total depth: 70mm (fixed front connection)

DIN rail slot: 15mm from bottom, 35mm wide

Terminal connection depth: approx. 15mm from front surface

Terminal tightening torque: 6N·m (for M6 bolts)

3.3 Installation Clearance Requirements

Location	Min. Distance	Description
Left and right	50mm	For wiring and heat dissipation
Top and bottom	50mm	Prevent heat buildup, ensure operating space
Front operating space	100mm	For handle operation and maintenance
Rear (in cabinet)	30mm	For cable bending radius

Installation Compatibility

4.1 DIN Rail Compatibility

Compatible with standard 35mm DIN rail (EN 60715:2001)

Rail material: steel or aluminum, recommended thickness 1.2mm

Mounting clips: self-contained spring clips, no extra fixings needed

4.2 Dimension Comparison with XT Series

Item	Tmax T2S 160 (1SDA050999R1)	Tmax XT2S 160	Difference
Width	90mm	90mm	Same, interchangeable position
Height	130mm	130mm	Same, panel cutout universal
Depth	70mm	82.5mm	XT series deeper; check cabinet space before replacement
Mounting	Same (35mm DIN rail)	Same	Fully compatible