SeaSonic Electronics Prime Ultra 550W Platinum Modular Power Supply

SeaSonic Electronics Prime Ultra 550W Platinum Modular Power Supply

SeaSonic Electronics Prime Ultra 550W Platinum Modular Power Supply

B&H # SESSR550PD2 MFR # SSR-550PD2
SeaSonic Electronics Prime Ultra 550W Platinum Modular Power Supply

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Product Highlights

  • 550W Single +12V Rail
  • 135mm Cooling Fan
  • ATX Form Factor
  • Modular Cables
  • 2 x PCIe Connectors
  • 4 x SATA Connectors
  • 1 x 4-Pin Connector
  • Modular Flat Black Cables
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Watts: 550W

550W 750W

More on the Way

B&H $500 Gift Card Dash

Share for a chance to win a $500 B&H Gift Card!

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Share a favorite product for chances to win one of eight $500 B&H Gift Cards!
1 new winner announced every Monday starting Nov 5th!
Limit 1 entry per day: Come back every day to increase your chance of winning.

Be sure to mention #BHWishList when you share!

Congrats to our winners so far:

Next winner: Dec 24th

James Z. (Wk 1)

Ralph H. (Wk 2)

Arturo M. (Wk 3)

Rich P. (Wk 4)

Valeria A. (Wk 5)

Sabrina B. (Wk 6)

Carolyn W. (Wk 7)

Official Rules


NO PURCHASE IS NECESSARY TO ENTER OR WIN. The B&H $500.00 Gift Card Dash (the "Sweepstakes") is void where prohibited by law and is sponsored by B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 ("Sponsor"). It is not sponsored or endorsed by Facebook or Twitter in any way.

Entry Period/Methods of Entry. The Sweepstakes will run from on or about October 28, 2018 until on or about December 23, 2018 (the "Entry Period"). Entries received outside the Entry Period are void. Enter the Sweepstakes via either one of the following methods. (1) Share any product found on the B&H website (the "Website") on Facebook or Twitter via the dedicated links contained on the website using the hashtag #BHWishlist; or (2) Mail a postcard (postmarked during the Entry Period) containing your name, address, phone number, and email address, and indicate the subject(s), if any, about which you are interested in receiving future emails from B&H (e.g. photo, video, audio, computers, home theater, portable entertainment ) (optional) to: B&H $500.00 Gift Card Dash Sweepstakes, c/o B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 (either option, an "Entry"). Entries must not, in the sole and absolute discretion of the Sponsor, contain obscene, provocative, defamatory, sexually explicit, or otherwise objectionable or inappropriate content. Entries deemed by Sponsor to be inappropriate will be disqualified. Entries owned by a third party, or the use of any trademarks, service marks, logos, brands, or products owned by a third party are not acceptable for entry into the Sweepstakes. Limit 1 entry per person, per day.

Winner Selection/Prizes/Odds. The B&H Social Team will randomly select a winner from among all eligible entries every Monday during the Entry Period, for a total eight (8) winners (each a "Winner"). Each Winner will receive a B&H Gift Card pre-valued in the amount of $500.00. No cash or other substitutions will be offered. Winner selection is in the sole and absolute discretion of the B&H Social Team. Any taxes are the sole responsibility of the winner. Winners will be notified and receive their prize at the email address associated with the account to which their Entry was posted or the email account provided with a mail-in entry. The odds of winning depend on the number of eligible entries received.

Identity of Winners/Eligible Participants. Winners will be identified by the email account associated with the Facebook or Twitter account from which their Entry was submitted or the email account provided with a mail-in entry. An email account holder shall mean the natural person assigned to such email account by the internet access or online service provider or other organization responsible for assigning email addresses for the domain associated with such email account. Any issues regarding the identity of a Winner shall be resolved by Sponsor in its sole discretion. The Sweepstakes is only open to residents of the United States that are at least eighteen (18) years of age on their entry date and is not open to employees of Sponsor, their immediate family, any person domiciled with such employees, or any affiliates or subsidiaries of Sponsor.

Entry Ownership/Entrant Agreements. Entrants retain full ownership and copyrights to their Submission. However, by entering the Sweepstakes entrants grant Sponsor permission to use their Entries for promotional purposes on their respective social media channels with proper credit. Entrants also agree: (a) to be bound by these Official B&H $500.00 Gift Card Dash Sweepstakes Rules; (b) that any claims related to this Sweepstakes shall be resolved individually without resort to any form of class action and that awards, shall be limited to actual out-of-pocket costs incurred in entering the Sweepstakes, and shall not include incidental or consequential damages or attorneys fees; and (c) that any actual or perceived ambiguities in these rules shall be interpreted by Sponsor in their sole discretion.

Limitation of Liability/Sponsor Modification/Cancellation Rights/ Choice of Law/ Venue/ Winners List. Sponsor is not responsible for incomplete entries or for failure to receive entries due to technical failures or human error of any kind. Winners agree that Sponsor will have no responsibility for losses or damage of any kind resulting from the acceptance, possession, or use of the prizes. Except where prohibited, participation in the Sweepstakes constitutes entrant's consent to the publication of his or her name by Sponsor in any media for commercial or promotional purposes without limitation or further compensation subject to Sponsor's respective Privacy Policies. Sponsor may modify or discontinue the Sweepstakes at any time and may disqualify from the Sweepstakes any person it determines, in its sole discretion, to have attempted to or actually tampered with or otherwise abused any aspect of the Sweepstakes. Entrants agree that in the unlikely event a dispute arises in connection with this Sweepstakes, it will be governed by the laws of the State of New York and heard exclusively in a court of applicable jurisdiction in the County and State of New York irrespective of any choice of law provisions to the contrary. To receive names of the winners by U.S. mail, please mail a self-addressed stamped envelope to: B&H Foto & Electronics Corp., Attn: B&H $500.00 Gift Card Dash Sweepstakes, 440 Ninth Avenue, New York, NY 10001. Any Winners List request must be received by B&H within one (1) year of the date the Sweepstakes is conducted.

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SeaSonic Electronics Prime Ultra 550 Platinum overview

  • 1Description

Featuring an ATX form factor, the Prime Ultra 550W Platinum Modular Power Supply from SeaSonic Electronics provides a single +12 V rail for stability and compatibility with current generation hardware. It also achieves 80 Plus Platinum certification, thanks its 92% efficiency at 50% system load.

It's built with multiple heavy-duty protection features and the modular design allows you to connect only the cables you need. Unused cables can be stored should you decide to upgrade your system down the road. With less cable clutter, there will be better airflow within the chassis for lower temperatures. A built-in 135mm fan operates silently, thanks to premium hybrid fan control, and provides additional heat dissipation.


80 PLUS Platinum certified
Micro tolerance load regulation (0.5%)
Cable-free connection design
Premium hybrid fan control (fanless until 40% load)
Multi-GPU setup
Gold-plated connectors
In the Box
SeaSonic Electronics Prime Ultra 550W Platinum Modular Power Supply
  • 1 x Main Power Cable (24/20 pins, 610mm)
  • 1 x CPU Cable (8/4 pins, 650mm)
  • 2 x PCIe Cables (8/6 pins, 675mm + 75mm)
  • 1 x SATA Cable (400mm + 120mm + 120mm + 120mm)
  • 1 x SATA Cable (300mm + 120mm)
  • 1 x Peripheral Cable (450mm + 120mm + 120mm)
  • 1 x Floppy Cable (101mm)
  • SATA 3.3 Adapter
  • Limited 12-Year Warranty
  • Table of Contents
    • 1Description

    SeaSonic Electronics Prime Ultra 550 Platinum specs

    Form Factor ATX
    Connectors 1 x Main Power (24/20 pins)
    1 x CPU (8/4 pins)
    2 x PCIe (8/6 pins)
    3 x Peripheral
    1 x Floppy
    Power Specifications
    AC Input Voltage
    100 - 240 V
    8 - 4 A
    50 - 60 Hz
    DC Output +3.3 V, 20 A (100 W)
    +5 V, 20 A (100 W)
    +12 V, 45 A (540 W)
    -12 V, 0.3 A (3.6 W)
    +5 Vsb, 3 A (15 W)
    Continuous Power 550 W
    Fan Specifications
    Fan Size 135 mm
    Fan Control Premium hybrid fan control
    Fan Bearing Fluid dynamic bearing
    Life Expectancy 50,000 hours @ 40°C, 15 - 65% RH
    Environmental Specifications
    Operating Temperature 32 - 122°F / 0 - 50°C
    (derating from 100% to 80% from 104 - 122°F / 40 - 50°C)
    Compliance Energy Star, RoHS, WEEE, ErP Lot 6, REACH
    General Specifications
    Protection OPP, OVP, UVP, OCP, OTP, SCP
    MTBF 150,000 hours
    Safety / EMC cTUVus, TUV, CB, CCC, BSMI, EAC, CE
    Dimensions 5.5 x 3.4 x 5.9" / 140 x 86 x 150 mm
    Weight Not specified by manufacturer
    Packaging Info
    Package Weight 6.55 lb
    Box Dimensions (LxWxH) 13.0 x 8.0 x 5.6"

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