AU-2C40UL

Thermal Magnetic Circuit Breaker, UL Series, 40 A, 2 Pole, 250 V, 277 V, DIN Rail

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.

Manufacturer: OMEGA
Product type: Thermal Magnetic Circuit Breakers
SVHC: No SVHC (04-Feb-2026)
No. of Poles: 2 Pole
Product Range: UL Series
Current Rating: 40A
Voltage Rating VAC: 277V
Voltage Rating VDC: 250V
Circuit Breaker Mounting: DIN Rail

Delivery and price
Units per pack	1
Price	114.09 €
Current stock	10+
Lead time	30 days

Datasheet

## **CirCuit Breakers for BranCh CirCuit ProteCtion uL 489 aC & DC CirCuit Breakers Miniature MCCB, CirCuit Breakers** 

## _**UL Series**_ 

**E301611 Pending** 

- **DIN Rail Mounted** 

- **Disconnect and Switching Function** 

- **17.5 mm (0.69") Width per Pole** 

- **Thermal Magnetic and Curent Limiting** 

- **Available in AC and DC** 

**AU‑3C15UL, 3‑pole circuit breaker, 15 Amp** 

**C‑trip curve.** 

- **240V, 480Y/277 Vac, 50/60Hz** 

- **125 Vdc (1-Pole), 250 Vdc (2-Pole)** 

- **10kA Short Circuit Interrupting Capacity** 

- **HACR Type 40°C (104°F)** 

- **Line/Load Reversible** 

**DIN rail sold separately. Visit omega.com/drtb‑rail** 

The UL 489 Series miniature molded case circuit breakers are DIN rail mountable and provide feeder and branch circuit protection per UL 489. Circuit breakers can be reset and reused over and over again, when compared with a standard fuse that must be replaced and discarded in compliance with special disposal procedures. Typical uses include convenience receptacles, motor controls, load circuits leaving equipment, and heating and air conditioning. 

UL 489 Series miniature circuit breakers are available in one-, two-, three- and four-pole configurations and up to 23 different current ratings from 0.3A to 63A and can safely be used in applications up to 480Y/277 Vac with a 10kA short circuit withstand rating. Two levels of circuit protection available, one for medium inrush startup currents to provide protection for small transformers, pilot devices, etc., and one with a magnetic range to allow for higher inrush levels during startup usually seen with motors. These molded case circuit breakers are Din rail mounted and, at only 17.5 mm wide, they are extremely compact and reduce panel size. 

**AU‑1C15UL, one pole AC circuit breaker, 15 Amp C‑trip curve.** 

**For Terminal Blocks and Enclosures. Visit omega.com/auto** 

## **Applications** 

## **AC C-Trip Curve** 

Accessories are field mounted on the UL 489 series circuit breakers for enhanced control and monitoring capabilities. Field mounting kits include all necessary parts and instructions. Accessories can be gang mounted on a single controller (the auxiliary switch in the outside position). The mounting arrangement links the internal latch-pins for the tripping mechanisms, ensuring simultaneous trips. Handles are linked to simplify manual resetting. Accessories include neutral pole, shunt and undervoltage trip and auxiliary contacts. 

Low inrush motors, resistive loads, wiring protection, receptacles, lighting, and control circuit applications. Relatively short thermal trip delay and medium magnetic trip point. 

## **AC D-Trip Curve** 

High inrush motors, transformers, power supplies, heaters and reactive loads. Relatively long thermal trip delay and very high magnetic trip point. 

## **DC C and D-Trip Curves** 

Telecommunication equipment, computer equipment, uninterruptable power supplies. 

**1** 

|**SPECIFICATIoNS**<br>**Current/Voltage Rating:**<br> **AC:**0.3-63A – 240 Vac<br> **AC:**0.3-32A 480Y/277 Vac<br>ae /7—|**No. PoLes**<br>**TyPe**<br>**0.3‑32 AmPs**<br>**1**<br>AC<br>10kA@120, 240, 277 V<br>**2‑3**<br>AC<br>10kA@120, 240, 480Y/277 V<br>**1**<br>DC<br>10kA @ 125V<br>**2**<br>DC<br>10kA @ 250V<br>**short Circuit Interrupt Rating**<br> ~~——~~||**40‑63 AmPs**<br>10kA @120, 240V<br>10kA @120, 240V<br>10kA @ 125V<br>10kA @ 250V|
|---|---|---|---|
|**DC:**0.3-63A 125 Vdc 1-pole - 250 Vdc<br>2-pole|**No. PoLes**<br>**TyPe**<br>**0.3 ‑ 32 AmPs**<br>**40‑63 AmPs**<br>**short Circuit Interrupt Rating according to IeC 60947‑2, DIN eN 60947‑2**|**DIN eN 60947‑2**||



|**No. PoLes**|**No. PoLes**|**TyPe**|**0.3 ‑ 32 AmPs**|**40‑63 AmPs**|
|---|---|---|---|---|
|**1**||AC|15kA @ 240V|15kA @ 240V|
|**2‑3**||AC|15kA @ 415V|10kA @ 415V|



**Electrical Life:** 6000 cycles on/off **Mechanical Life:** 10,000 cycles on/off **Calibration Temperature:** 40°C (104°F) **operating Temperature:** -25 to 55°C (-13 to 131°F) 

## **Dimensions:** 

**Terminal Size Acceptability:** Top 18-3 AWG, Bottom18-2 AWG 

**Height:** 105.3mm (4.15") **Width:** One Pole 17.5mm (0.69"), 2 Pole 35mm (1.38"), 3 Pole 52.5 mm (2.07") **Depth:** From Din rail 68.4 mm (2.69") 

**Storage Temperature:** -25° to 70°C (-13° to 158°F) 

**Tightening Torque Minimum/Maximum:** 17.7/ 22lb-in. (2/2.2 Nm) **Terminal Protection Degree:** IP20 

**Wire Connection:** Copper wire only, 60/75°C 

**==> picture [476 x 183] intentionally omitted <==**

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**==> picture [508 x 217] intentionally omitted <==**

**----- Start of picture text -----**<br>
Trip-Characteristics* Applications<br>Characteristic Trip Boundaries Lighting<br>Business Power Motors Telecommu-<br>> Thermal Trip Magnetic Trip ProtectionWiring Equipment Transformers Supplies i Reactive nications/ Power<br>Load Computer Supplies<br>Must not Must Trip Must not Must Trip Control Appliances Heaters Low High Equipment<br>Trip>100ms <1hr Trip>100ms at 100ms Circuits Inrush Inrush<br>{| [| [- na<br>C-Characteristics AC<br>1.05xRC 1.35xRC 5xRC 10xRC<br>—— jbl] | je) | | [<br>C-Characteristics DC<br>———+ 1.05xRC 1.35xRC 7xRC 14xRC | | | | | | [elk<br>D-Characteristics AC fi F P F<br>—_ 1.05xRC 1.35xRC 10xRC 16xRC | ——| [ e e l ( ee ) |<br>D-Characteristics DC<br>-_ 1.05xRC 1.35xRC 14xRC 22.4xRC | ——; | | | | | [elk<br>*  The value of each characteristic is shown vertically beneath its corresponding heading.<br>**----- End of picture text -----**<br>


## _**Warning!**_ 

_This information should only be used as a selection guide. The use of a Miniature Circuit Breaker in an application with a certain Trip-Characteristic always requires prototype testing. It is the responsibility of the circuit design engineer to select the appropriate Miniature Circuit Breaker for his specific application_ . 

**2** 

**==> picture [511 x 143] intentionally omitted <==**

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C (AC) Trip Curve D (AC) Trip Curve C (DC) Trip Curve D (DC) Trip Curve i) ih /<br>1.05-1.35xI6040 N 1.05-1.35xI6040 N 1.05-1.35xI6040 N 1.05-1.35xI6040 N<br>104 | Tee Thermal Overload “Must Trip” < 1 hr = 135% RC “Must Not Trip” > 1 hr = 105% RC 104 Chinn Thermal Overload “Must Trip” < 1 hr = 135% RC “Must Not Trip” > 1 hr = 105% RC 104 { (A Thermal Overload “Must Trip” < 1 hr = 135% RC “Must Not Trip” > 1 hr = 105% RC 104 | (i Thermal Overload “Must Trip” < 1 hr = 135% RC “Must Not Trip” > 1 hr = 105% RC ( i}VsyV/<br>1 1 1 1<br>iW Ji. i ‘ct Lan] luk  PC<br>10 10 10 10<br>4 WOO 4 A 4 oe 4 Ne<br>1 an.) a 1 | | Se 1 a, i 1 | | Neal ||<br>4x10100.4 [-1][-2] aa)a eefa 4x10100.4 [-1][-2] aRhSh ia 4x10100.4 [-1][-2] hla) iare 4x10100.4 [-1][-2] |Rhit|JitNeea<br>10 [-2] nl Uhm 10 [-2] Rl a 10 [-2] Ball Ca 10 [-2] Ba Gi<br>4x10 [-3] Lt| NG! 4x10 [-3] | | | TILIN — 4x10 [-3] RT = 4x10 [-3] LT UT<br>L 10 [-3] 1 LEWES 2 3 4 5 6 8 10 20 40 100 «tO 10 [-3] 1 OLLI 2 3 4 5 6 8 10 16 20 40 100 LC 10 [-3] 1 LLU 2 3 4 5 67 8 10 14 20 40 100 L 10 [-3] 1 LLATTEr) 2 3 4 5 6 8 10 14 22.4 40 100<br>Multiple of Rated Current Multiple of Rated Current Multiple of Rated Current Multiple of Rated Current<br>0.3A Through 10A Rated Current 0.3A Through 10A Rated Current 0.3A Through 10A Rated Current 0.3A Through 10A Rated Current<br>Minutes Minutes Minutes Minutes<br>Tripping time t Tripping time t Tripping time t Tripping time t<br>Seconds Seconds Seconds Seconds<br>**----- End of picture text -----**<br>


## **Accessories** 

Accessories can be field mounted on UL 489 Series miniature molded case circuit breakers for enhanced control and monitoring capabilities. Field mounting kits include all necessary parts and instructions. Accessories can be gang mounted on a single controller (the Auxiliary Switch in the outside position). The mounting arrangement links the internal latch-pins for the tripping mechanisms, ensuring simultaneous trips. Handles are linked to simplify manual resetting. 

|**moDeL NUmbeR**|**DesCRIPTIoN**|
|---|---|
|**AU‑N32UL**|Neutralpole for circuit breaker,0.3 to 32a|
|**AU‑N63UL**|Neutralpole for circuit breaker,40 to 63A|
|**AU‑h10UL**|1 Auxiliarycontact,normallyopen|
|**AU‑h11UL**|2 Auxiliarycontact,1 NO and 1 NC|
|**AU‑h12UL**|3 Auxiliarycontact,1 NO and 2 NC|
|**AU‑FA12UL**|12 V AC/DC shunt trip,1.3A|
|**AU‑FA24UL**|24 V AC/DC  shunt trip,0.6A|
|**AU‑FA48UL**|48 V AC/DC shunt trip,0.2A|
|**AU‑FA110UL**|Shunt trip, 110 to 240 Vac/Vdc, 277 Vac, 0.25A @ 110V<br>0.5A @ 240V 0.58A @ 277V|
|**AU‑UA120UL**|Undervoltage Trip, 120 Vac, 60 Hz (UL Pending)|



## **To Order** _**Visit omega.com/ul489_Series for Pricing and Details**_ 

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|---|---|---|---|---|---|
|**moDeL NUmbeRs**||||||
|**oNe PoLe AC**|**Two PoLe AC**|**ThRee PoLe AC**|**oNe PoLe DC**|**Two PoLe DC**|**RATeD CURReNT**|
|**AU‑1(*)03UL**<br>~~ee~~|**AU‑3(*)03UL**<br>~~ee~~|**AU‑3(*)03UL**<br>~~ee~~|**AU‑1(*)03DL**<br>~~ee~~|**AU‑3(*)03DL**<br>~~ee~~|0.3A<br>~~ee~~|
|**AU‑1(*)05UL**<br>~~a~~|**AU‑2(*)05UL**<br>~~a~~|**AU‑3(*)05UL**<br>~~a~~|**AU‑1(*)05DL**<br>~~a~~|**AU‑2(*)05DL**<br>~~a~~|0.5A<br>~~a~~|
|**AU‑1(*)1UL**<br>~~a~~|**AU‑2(*)1UL**<br>~~a~~|**AU‑3(*)1UL**<br>~~a~~|**AU‑1(*)1DL**<br>~~a~~|**AU‑2(*)1DL**<br>~~a~~|1.0A<br>~~a~~|
|**AU‑1(*)1.6UL**<br>~~a~~|**AU‑2(*)1.6UL**<br>~~a~~|**AU‑3(*)1.6UL**<br>~~a~~|**AU‑1(*)1.6DL**<br>~~a~~|**AU‑2(*)1.6DL**<br>~~a~~|1.6A<br>~~a~~|
|**AU‑1(*)2UL**<br>~~a~~|**AU‑2(*)2UL**<br>~~a~~|**AU‑3(*)2UL**<br>~~a~~|**AU‑1(*)2DL**<br>~~a~~|**AU‑2(*)2DL**<br>~~a~~|2.0A<br>~~a~~|
|**AU‑1(*)3UL**<br>~~a~~|**AU‑2(*)3UL**<br>~~a~~|**AU‑3(*)3UL**<br>~~a~~|**AU‑1(*)3DL**<br>~~a~~|**AU‑2(*)3DL**<br>~~a~~|3.0A<br>~~a~~|
|**AU‑1(*)4UL**<br>~~a~~|**AU‑2(*)4UL**<br>~~a~~|**AU‑3(*)4UL**<br>~~a~~|**AU‑1(*)4DL**<br>~~a~~|**AU‑2(*)4DL**<br>~~a~~|4.0A<br>~~a~~|
|**AU‑1(*)5UL**<br>~~a~~|**AU‑2(*)5UL**<br>~~a~~|**AU‑3(*)5UL**<br>~~a~~|**AU‑1(*)5DL**<br>~~a~~|**AU‑2(*)5DL**<br>~~a~~|5.0A<br>~~a~~|
|**AU‑1(*)6UL**<br>~~a~~|**AU‑2(*)6UL**<br>~~a~~|**AU‑3(*)6UL**<br>~~a~~|**AU‑1(*)6DL**<br>~~a~~|**AU‑2(*)6DL**<br>~~a~~|6.0A<br>~~a~~|
|**AU‑1(*)8UL**<br>~~GO~~|**AU‑2(*)8UL**<br>~~GO~~|**AU‑3(*)8UL**<br>~~GO~~|**AU‑1(*)8DL**<br>~~GO~~|**AU‑2(*)8DL**<br>~~GO~~|8.0A<br>~~GO~~|
|**AU‑1(*)10UL**<br>~~a ~~|**AU‑2(*)10UL**<br> ~~GO~~|**AU‑3(*)10UL**<br>~~GO~~|**AU‑1(*)10DL**<br>~~GO~~|**AU‑2(*)10DL**<br>~~GO~~|10A<br>~~GO~~|
|**AU‑1(*)12UL**<br>~~a ~~|**AU‑2(*)12UL**<br> ~~GO~~|**AU‑3(*)12UL**<br>~~GO~~|**AU‑1(*)12DL**<br>~~GO~~|**AU‑2(*)12DL**<br>~~GO~~|12A<br>~~GO~~|
|**AU‑1(*)13UL**<br>~~a ~~|**AU‑2(*)13UL**<br> ~~GO~~|**AU‑3(*)13UL**<br>~~GO~~|**AU‑1(*)13DL**<br>~~GO~~|**AU‑2(*)13DL**<br>~~GO~~|13A<br>~~GO~~|
|**AU‑1(*)15UL**<br>~~FTOC~SOSOT..OCd~~|**AU‑2(*)15UL**<br>~~FTOC~SOSOT..OCd~~|**AU‑3(*)15UL**<br>~~FTOC~SOSOT..OCd~~|**AU‑1(*)15DL**<br>~~FTOC~SOSOT..OCd~~|**AU‑2(*)15DL**<br>~~FTOC~SOSOT..OCd~~|15A<br>~~FTOC~SOSOT..OCd~~|
|**AU‑1(*)16UL**<br>~~a~~<br>~~ne~~|**AU‑2(*)16UL**<br>|**AU‑3(*)16UL**<br>|**AU‑1(*)16DL**<br>|**AU‑2(*)16DL**<br>|16A<br>|
|**AU‑1(*)20UL**<br>~~ne~~|**AU‑2(*)20UL**<br>|**AU‑3(*)20UL**<br>|**AU‑1(*)20DL**<br>|**AU‑2(*)20DL**<br>|20A<br>|
|**AU‑1(*)25UL**<br>~~nea~~|**AU‑2(*)25UL**<br>~~a~~|**AU‑3(*)25UL**<br>~~a~~|**AU‑1(*)25DL**<br>~~a~~|**AU‑2(*)25DL**<br>~~a~~|25A<br>~~a~~|
|**AU‑1(*)30UL**<br>~~a~~|**AU‑2(*)30UL**<br>~~a~~|**AU‑3(*)30UL**<br>~~a~~|**AU‑1(*)30DL**<br>~~a~~|**AU‑2(*)30DL**<br>~~a~~|30A<br>~~a~~|
|**AU‑1(*)32UL**<br>~~a~~|**AU‑2(*)32UL**<br>~~a~~|**AU‑3(*)32UL**<br>~~a~~|**AU‑1(*)32DL**<br>~~a~~|**AU‑2(*)32DL**<br>~~a~~|32A<br>~~a~~|
|**AU‑1(*)40UL**<br>~~a~~|**AU‑2(*)40UL**<br>~~a~~|**AU‑3(*)40UL**<br>~~a~~|**AU‑1(*)40DL**<br>~~a~~|**AU‑2(*)40DL**<br>~~a~~|40A<br>~~a~~|
|**AU‑1(*)50UL**<br>~~a~~|**AU‑2(*)50UL**<br>~~a~~|**AU‑3(*)50UL**<br>~~a~~|**AU‑1(*)50DL**<br>~~a~~|**AU‑2(*)50DL**<br>~~a~~|50A<br>~~a~~|
|**AU‑1(*)60UL**<br>~~a~~|**AU‑2(*)60UL**<br>~~a~~|**AU‑3(*)60UL**<br>~~a~~|**AU‑1(*)60DL**<br>~~a~~|**AU‑2(*)60DL**<br>~~a~~|60A<br>~~a~~|
|**AU‑1(*)63UL**<br>~~a~~|**AU‑2(*)63UL**<br>~~a~~|**AU‑3(*)63UL**<br>~~a~~|**AU‑1(*)63DL**<br>~~a~~|**AU‑2(*)63DL**<br>~~a~~|63A<br>~~a~~|



_**Note:** (*)= ”C” for C-curve and “D” for d-curve._ _**Ordering Example: AU-1C05UL** 1-pole minature MCCB, AC circuit breaker rated for 0.5 A C-trip curve_ _**AU-2D2UL** 2-pole minature MCCB, AC circuit breaker rated for 2 A D-trip curve_ 

**3**

Updated at June 9, 2026

Omega is a globally recognized leader in the design and manufacture of state-of-the-art products for process measurement and control. Renowned for its engineering expertise, the company provides highly reliable solutions for monitoring critical parameters such as temperature, humidity, pressure, strain, and flow across diverse industrial applications. Our extensive selection of Omega products is focused on the brand's core strengths in sensing and automation technologies. The range features a vast array of high-precision temperature sensors, including industry-standard thermocouples and RTDs, supported by a comprehensive selection of essential sensor accessories. To complement these measurement devices, we offer a substantial lineup of robust temperature controllers and advanced pressure transducers engineered to maintain precise conditions in demanding environments. Beyond primary sensing and control, the Omega portfolio encompasses sophisticated panel instrumentation for clear process visualization, alongside highly accurate force sensors and load cells. The offering is completed by reliable signal converters, data acquisition tools such as dataloggers, and fundamental connectivity components, providing professionals with the specialized equipment necessary to build complete, end-to-end industrial control systems.

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