LS A1U-60 Legacy Shield™ Miniature Circuit Breaker — Datasheet

At the breaker

The numbers you need with the cover off

Everything below comes from the Legacy Shield™ LS A1U-60 Component Datasheet v1.0. Apply within nameplate ratings only.

Rated current: 5–60 A11 ratings per pole configuration
Rated voltage: 120/240 VVAC · 50/60 Hz · 3-pole 240 VAC
Interrupting rating: 10 kAIcu = Ics = 10 kA
Trip curve: Type CThermal-magnetic · instantaneous 6.4–9.6 In
Conductors: 14–4 AWGCopper only · 60/75 °C · 2–25 mm²
Terminal torque: 3.5 N·m31 lb·in — verify every terminal

Ordering guide

Build the catalog number

Pick the rating, the poles and any accessories. The catalog number, part numbers and ratings update from the ordering tables in the datasheet.

Catalog number

LS A1U-60C60/1

Request a quote for this part

Pricing and volume quotes through Legacy Controls or your local authorized Legacy Controls sales and service provider.

Technical characteristics

Specifications

UL 489 listed, thermal-magnetic, suitable for main or branch circuit protection in industrial control panels, power supply equipment, HVAC systems and lighting and receptacle circuits.

Electrical

Applicable standard: UL 489
Rated current: 5 – 60 A
Rated voltage: 120/240 VAC (1 & 2 pole) · 240 VAC (3 pole)
Rated frequency: 50/60 Hz
Rated insulation voltage: 1,000 VAC
Rated impulse withstand: 6 kV

Protection

Tripping type: Thermal magnetic
Tripping characteristic: Type C (6.4 In – 9.6 In)
Short-circuit current (Icu): 10 kA
Operating breaking capacity (Ics): 10 kA
Protection degree: IP20

Life & environment

Electrical life: 6,000 operations
Mechanical life: 10,000 operations
Operating temperature: −25 °C to +40 °C (reference 30 °C)
Pollution level: Class III
Elevation: Not exceeding 6,561 ft (2,000 m)
Relative humidity: ≤ 90 % at 20 °C · ≤ 50 % at 40 °C

Wiring & mounting

Conducting wire: 14 – 4 AWG (2 – 25 mm²) copper
Conductor temperature: 60/75 °C
Terminal torque: 3.5 N·m (31 lb·in)
Installation: 35 mm DIN rail · optional feet for bottom or surface mounting

UL interrupting rating

Circuit breaker type	Poles	Ampere rating	120/240 VAC	240 VAC
LS A1U-60	1	5 – 60 A	10 kA	N/A
LS A1U-60	2	5 – 60 A	10 kA	N/A
LS A1U-60	3	5 – 60 A	N/A	10 kA

Tripping characteristics

Type C trip curve

Type C thermal-magnetic trip element with an instantaneous trip region of 6.4–9.6 In (8 In ± 20 %).

Type C time-current tripping curve: trip time in seconds against multiples of rated current I/In, with the instantaneous region between 6.4 and 9.6 In — Figure 1 — Type C tripping curve (reference)Open full size ↗

Conventional non-tripping current I1 = 1.05 × In

No trip for t > 1 h (In ≤ 50 A) · t > 2 h (In > 50 A).

Conventional tripping current I2 = 1.35 × In

Trips within t ≤ 1 h (In ≤ 50 A) · t ≤ 2 h (In > 50 A).

Instantaneous region 6.4 – 9.6 × In

Type C magnetic trip band — 8 In ± 20 %.

Dimensions & mounting

Dimensions

All dimensions mm [inch]. The visual switch window shows green when open (O / OFF) and red when closed (I / ON).

Pole width

1 Pole18.8mm · 0.74 in
2 Pole37.6mm · 1.48 in
3 Pole56.4mm · 2.22 in

Product weight

1 Pole0.161kg · 5.7 oz
2 Pole0.314kg · 11.1 oz
3 Pole0.467kg · 16.5 oz

Dimensioned drawing, 35 mm DIN rail mounting: side view and 1 to 3 pole front view, with visual switch window — Figure 2a — 35 mm DIN rail mounting · mm [inch]Open full size ↗

Dimensioned drawing, mounting-foot installation: side view and 1 to 3 pole front view with mounting feet — Figure 2b — Mounting-foot installation · mm [inch]Open full size ↗

Installation & field wiring

Install it right

Warning — risk of electric shock

Risk of electric shock and serious injury. Installation must be carried out by qualified personnel only, per the National Electrical Code (NEC) and all applicable local codes. De-energize the circuit and verify with a voltage tester before installing or servicing any breaker.

Conductors
Copper wire only, 14–4 AWG (2–25 mm²), temperature rating 60/75 °C.
Terminal torque
Tighten terminals to 3.5 N·m (31 lb·in) and verify all torque values. Reliable connections prevent terminal overheating and burn-out.
Mounting
Standard 35 mm DIN rail; optional mounting feet (MF) enable bottom or surface mounting.
Multi-pole operation
Operate 2- and 3-pole handles from the center position. Normal ON/OFF switching time is less than 1 second.
Locking
The handle is lockable in the ON or OFF position; the HS handle safety lock secures either position.

Pole configurations: 1 pole terminals 1 and 2; 2 pole terminals 1-2 and 3-4; 3 pole terminals 1-2, 3-4 and 5-6; multi-pole handles mechanically ganged — Figure 3 — Pole configurationsOpen full size ↗

Warranty & support

Backed by the people who build it

Limited warranty

24 months

Legacy Shield™ Series circuit breakers are warranted for twenty-four (24) months from the date of purchase against defects in materials and workmanship. Legacy Controls will repair or replace, at its sole discretion, any defective unit returned with proof of purchase, provided it was used under normal operating conditions.

Warranty void if

Products are misused, altered, or improperly installed.
Damage results from accidents, overload, or environmental factors.
The unit is repaired by unauthorized personnel.

Making a claim

Contact Legacy Controls within the warranty period with proof of original purchase, the catalog number, and a detailed description of the issue. If directed, return the unit to the designated Florida facility, shipping prepaid.

Technical support, ordering & warranty claims

(321) 284-8592 Support@Legacy-Controls.com

Legacy Controls · 6200 FL-46, Mims, Florida 32754

Compliance & notes

Installation by qualified personnel only, per NEC and all applicable local codes.
Suitable for main or branch circuit protection when applied within nameplate ratings.
Copper conductors only, 14–4 AWG, 60/75 °C · terminal torque 3.5 N·m (31 lb·in).
Any alteration, modification, or unauthorized repair voids the UL listing and warranty.

LS A1U-60Miniature Circuit Breaker