Siemens 3VA1150-4EF32-0AF0 SENTRON MCCB, 50 A, 121 kA at 240

Name: 3VA1150-4EF32-0AF0
Brand: Siemens
SKU: 3VA1150-4EF32-0AF0
Availability: LimitedAvailability
Author: Lube-Tech Lonnie

Specifications

Identification

3VA1150-4EF32-0AF0 — Identification
Parameter	Value
Product designation	Molded case circuit breaker
Brand / range	SENTRON
Product version	Line protection
Integrated auxiliary / alarm switch ref.	3VA9988-0AB12

Ratings

3VA1150-4EF32-0AF0 — Ratings
Parameter	Value
Number of poles	3
Current at 40 °C	50 A
Current at 45 °C	50 A
Current at 50 °C	50 A
Current at 55 °C	48 A
Current at 60 °C	47 A
Current at 65 °C	46 A
Current at 70 °C	45 A
Switching capacity class	S
Breaking capacity at 240 V	121 kA
Breaking capacity at 415 V	75.6 kA
Breaking capacity at 440 V	52.5 kA
Breaking capacity at 690 V	11.9 kA

Protection & Trip Unit

3VA1150-4EF32-0AF0 — Protection & Trip Unit
Parameter	Value
Overcurrent release (trip unit) type	TM240

Construction & Connection

3VA1150-4EF32-0AF0 — Construction & Connection
Parameter	Value
Main circuit connection type	lug terminal
Main circuit connector arrangement	Front terminal
Protection class (IP), front	IP40

Accessories & Functions

3VA1150-4EF32-0AF0 — Accessories & Functions
Parameter	Value
Undervoltage release	No
Voltage trigger	No
Trip indicator	Yes
Communication function	No
Measurement function	No
Motor drive option	Yes
Auxiliary CO contacts	2

Environmental

3VA1150-4EF32-0AF0 — Environmental
Parameter	Value
Operating temperature, max.	70 °C
Operating temperature, min.	-25 °C
Storage temperature, max.	80 °C
Storage temperature, min.	-40 °C

Mechanical

3VA1150-4EF32-0AF0 — Mechanical
Parameter	Value
Height	130 mm
Width	76.2 mm
Depth	70 mm

Product details

Temperature derating — the real-world current

The 3VA1150-4EF32-0AF0: Rated 50 A all the way to 50 °C ambient. At 55 °C it's 48 A, at 60 °C it's 47 A, and at 70 °C it's 45 A. That's a gentle slope — you don't lose much headroom until the panel gets truly hot. The TM240 release is adjustable for the long-time pickup, so you can dial it to match the load without swapping the breaker.

Panel fit and auxiliary contacts

Mounts on a DIN rail or panel-mount base. The 70 mm depth means it won't crowd the gland plate in a shallow enclosure. Comes with one auxiliary switch and one trip alarm switch HQ — that's enough to signal the PLC that the breaker tripped without a separate alarm module. IP40 on the front keeps dust out of the handle mechanism; fine for a clean indoor panel, but don't hose it down.

Frequently asked questions

What is the interrupting capacity of this breaker at 415 V?

75.6 kA at 415 V. That's well above typical industrial secondary-side fault levels; it clears a bolted fault without upstream coordination headaches.

Will 3VA1150-4EF32-0AF0 drop into a panel wired for 3VA1010-4ED32-0AC0?

The 3VA1150 is physically larger — 76.2 mm wide versus the 3VA1010's narrower frame. Same DIN-rail mounting concept, but the cutout and bus spacing may differ. You'll want to verify the footprint against the existing panel layout before swapping.

What compliance documentation does Siemens provide for this MCCB?

Standard Siemens SENTRON documentation package includes RoHS and REACH declarations, plus IEC 60947-2 and UL 489 certifications. Specific certificates are available on request at quote time.

Where can I buy 3VA1150-4EF32-0AF0 and how is it quoted?

Sourced and quoted to order against an RFQ through independent industrial distribution. Availability and current pricing confirmed at quote time — no stock count or price published here.