BRAH Electric
 
Siemens 3TY7550-0A replacement Contact Kit – BRAH B3TY7550-0A
B3TY7550-0A Contact Kit – view 1 of 4B3TY7550-0A Contact Kit – view 2 of 4B3TY7550-0A Contact Kit – view 3 of 4

Siemens 3TY7550-0A Replacement Contact Kit

BRAH B3TY7550-0A replaces the Siemens 3TY7550-0A contact kit: 300A, 3-pole, 600V. Part of the World Series family. Covered by a BRAH Electric 6-month warranty; in-stock orders placed before 3:00 PM Pacific ship the same business day.

Factory New
Drop-in fit
Matches OEM Specs
In Stock
$764.46USD
1
6-Month Warranty included
(855) 355-2724Average waiting time: 1 min

Product Specifications

DatasheetCAD Doc (STEP)

3TY7550-OA, 3 pole contact kit, rated for 300 amp, 600 volt max, suitable for NEMA size 4.5 motor starters and contactors, suitable with Siemens World Series model types 3TF55, 14KT, 40KT, 22KT, 43KT, complete assembly kit includes all contacts and related mounting screws and hardware, direct substitute for Siemens OEM 3TY7550-OA.

BRAH part: B3TY7550-0A. Also replaces: 3TY7550-OA, SF55LC

B3TY7550-0A specifications
BRAH Part NumberB3TY7550-0A
Replacement for OEM Part #3TY7550-OA, SF55LC
Replacement for OEM MfrSiemens
FamilyWorld Series
Type3TY7, B3TY7
Amperage300A
Voltage600V
Poles3P

Frequently Asked Questions

Is this a direct drop-in replacement?
Yes. All BRAH Electric products are engineered as 1:1 direct replacements for the corresponding OEM part. No modifications, adapters, or special wiring are required for installation.*
*Exceptions may apply.
What warranty is included?
Every BRAH product ships with a 2-year warranty from the date of invoice. We guarantee proper function without defects according to provided specifications. Contact Kits carry a 6-month warranty.
Do you offer volume or bulk pricing?
Yes. If you are purchasing 10 or more units, or plan to buy regularly, you may qualify for our volume or reseller pricing program. Click on the product page or call us at (855) 355-2724.
What is your return policy?
Returns must be approved by a BRAH Electric representative with an RMA number. Returns within 30 days of shipment are subject to a restocking charge of 25–50%. Items are non-refundable after 30 days. Contact our support team to request an RMA. If you are unsure about product fit, call us at (855) 355-2724. See our Policies page for full details.
How fast will my order ship?
In-stock items ordered before 3:00 PM (Pacific) ship the same business day. You can see the live shipping countdown timer on the product page. Most domestic orders arrive within 2–5 business days.
Is this compatible with my Siemens motor control equipment?
Yes. This BRAH replacement is engineered for direct compatibility with Siemens motor control equipment and follows the same mounting and electrical specifications as the original part.
What OEM part numbers does B3TY7550-0A replace?
B3TY7550-0A is a direct replacement for 3TY7550-OA, SF55LC. No modifications or adapters are required—it installs like the original.
Is B3TY7550-0A a drop-in replacement for 3TY7550-OA, SF55LC?
Yes. B3TY7550-0A is a 1:1 drop-in replacement for 3TY7550-OA, SF55LC in Siemens applications. Same mounting and wiring.

Why purchase from BRAH Electric?

The new leader in aftermarket electrical parts. Trusted by more than 10k customers. Parts are tested at BRAH Electric's Carlsbad, California facility.

Rated 5.0 from 33 Google reviews (as of October 2026). Read our reviews on Google

Factory New
Drop-in fit
Matches OEM Specs
Ships Worldwide
6-Month Warranty included

Related Products

BRAH B3TY7403-0AC1 Magnetic Coil – replaces Siemens 3TY7403-0AC1
B3TY7403-0AC1
Substitute for Siemens 3TY7403-0AC1
View Product
Coil Voltage24VAC
Frequency60Hz
Amperage Contactor9A - 16A
FamilyWorld Series
BRAH B3TY7403-0AC2 Magnetic Coil – replaces Siemens 3TY7403-0AC2
B3TY7403-0AC2
Substitute for Siemens 3TY7403-0AC2, SF4024V
View Product
Coil Voltage24VAC
Frequency50/60Hz
Amperage Contactor9A - 16A
FamilyWorld Series
BRAH B3TY7403-0AK6 Magnetic Coil – replaces Siemens 3TY7403-0AK6
B3TY7403-0AK6
Substitute for Siemens 3TY7403-0AK6, SF40120V
View Product
Coil Voltage120VAC
Frequency60Hz
Amperage Contactor9A - 16A
FamilyWorld Series
BRAH B3TY7403-0AM1 Magnetic Coil – replaces Siemens 3TY7403-0AM1
B3TY7403-0AM1
Substitute for Siemens 3TY7403-0AM1, SF40208V
View Product
Coil Voltage208VAC
Frequency60Hz
Amperage Contactor9A - 16A
FamilyWorld Series

More Siemens World Series replacement parts

View all Siemens 3TY7 replacement partsView all Siemens World Series replacement parts