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Profoto 331521 Flashtube for AcuteB Head Replacement — main product image
Profoto

Profoto 331521 Flashtube for AcuteB Head Replacement

Keep your Profoto AcuteB head firing at full power with this OEM replacement flashtube.

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Overview

The Profoto 331521 is a genuine replacement flashtube engineered specifically for the Profoto AcuteB flash head. Over time, flashtubes degrade through normal use — output becomes inconsistent, color temperature shifts, and recycle times lengthen. This OEM replacement restores your AcuteB head to factory-level performance, ensuring that your lighting remains predictable and reliable across shoots.

As an authentic Profoto component, the 331521 is manufactured to the same tolerances as the original tube, so there are no concerns about fit, compatibility, or performance deviations. Installation is a relatively simple process that most photographers can handle themselves, making it a practical way to extend the life of an AcuteB kit rather than replacing the entire head. For professionals who depend on consistent output from session to session, keeping a spare flashtube on hand is a sensible investment.

Key Features

Replacement flashtube.

Even though flash tubes are designed to last tens of thousands of flashes, sometimes one is broken to due to rough conditions or other hazards. Here is the replacement, for Acute B head.

Even though flash tubes are designed to last tens of thousands of flashes, sometimes one is broken to due to rough conditions or other hazards. Here is the replacement, for Acute B head.

Specifications

Brand
Profoto
Model
331521
Compatibility
AcuteB Head
Color
Black
Type
Replacement Flashtube

Pros & Cons

👍 Pros

  • Genuine Profoto OEM part ensures exact fit and reliable performance in AcuteB heads.
  • Restores consistent light output and color temperature to an aging or worn flash head.
  • Simple replacement process that can extend the working life of your existing AcuteB system.
  • Maintains compatibility with all AcuteB power settings and modifiers.

👎 Cons

  • Only compatible with the AcuteB head, so it cannot be used as a spare for other Profoto systems.
  • Premium pricing typical of genuine Profoto replacement parts.
  • Flashtubes are fragile glass components that require careful handling during installation.

Frequently Asked Questions

No, the Profoto 331521 is specifically designed for AcuteB flash heads only and is not compatible with other Profoto head models.
Common signs include inconsistent light output, color temperature shifts, longer recycle times, or visible darkening or damage to the glass tube.
Yes, flashtube replacement on the AcuteB head is a straightforward process, though you should consult Profoto's documentation to ensure proper handling and seating of the tube.
Yes, as a genuine Profoto replacement part, it is manufactured to the same specifications as the original tube that ships with the AcuteB head.

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