AV PRO SE CFexpress B v4 MK2 512 GB

Meet the new standard in high-performance storage media. Powered by CFexpress v4 Type B technology, this card is built to accelerate your workflow with reliable performance across all shooting modes, including 12K+ RAW and beyond. With capacities up to 4 TB, these cards offer versatility for a variety of production workflows.

Tip: optimize your card’s performance and lifespan with regular firmware updates. To do that, you’ll need to pair it with the Angelbird card reader CFexpress B.

Deep dive

Angelbird Stable Stream™

At Angelbird, we understand that true performance isn’t about maximum speeds — it’s about delivering smooth, drop-free results throughout the entire creative process, so we always tend to emphasize the “sustained speed” read and write performances.

Because, in our humble opinion, that value is the true measure of a card’s performance. It shows how the card can write or read data consistently, not just at the beginning. This is especially important when you’re shooting videos. If there’s a large gap between the minimum and maximum read/write speed, chances are you will see dropped frames, errors, or a big drop-off in the performance quality as you begin shooting or gaming.

That’s why Angelbird’s Stable Stream™  was developed — to actively support sustained performance.

What is the Stable Stream™ about?

Stable Stream™ supports uninterrupted read and write performance with high IOPS (Input/Output Operations per Second) and low latency across the entire capacity of the memory card.
Consistency: Maintained performance without drops, even under continuous or heavy workloads.

Efficiency: Optimized workflows that allow creators to focus on their creative work rather than worrying about technical limitations.

Why Stable Stream™ matters for you
Creative professionals need tools they can trust. Stable Stream™ guarantees:
Highest sustained performance recording: Seamless handling of up to 12K RAW, high-speed photography, and extended shoots.
Seamless data transfer: Consistent read and write speeds for efficient post-production workflows.
Thermal stability: Advanced Thermal Management to prevent card from overheating.

Real-world performance you can count on
From production to post-production, Stable Stream™ supports you when it matters most.
The entire Angelbird memory card and SSD series features Stable Stream™ technology and ensures consistent, stable performance throughout the capacity of the card.

Tech specs

General

Capacity

512 GB

Form factor

CFexpress™ Type B

Unit dimensions

38.5 x 3.8 x 29.8 mm | 1.52 x 0.15 x 1.17 in

Unit weight

~ 7 g | 0.25 oz

Performance

512 GB

Max. read speed

3700 MB/s

Max. write speed

1100 MB/s

Sustained read speed

3500 MB/s

Sustained write speed

1050 MB/s

Speeds based on internal testing. Actual transfer rates and capacity may vary depending on system hardware and other factors. 4K, 6K, 8K, 12K and Full HD video & photo support may vary depending on the host device, file attributes, and other factors.

Technical

Interface

CFexpress™ v4 Type B, PCIe 4.0 x2

Features

Temperature sensor, TRIM, ECC, EMS protection, SMART, power management

TRIM and SMART support depending on the OS used.

Reliability

Data reliability

Built-in EDC, ECC function

Electronics

DC input voltage

+3.3 V ± 10 %

Power usage

Sleep <50 mW, idle ~800 mW, up to 3.75 W

Resistance

Humidity (operating)

5 % to 95 % non-condensing

Temperature (operating)

-12/72 °C | 10/162 °F

Temperature (storage)

-40/85°C | -40/185 °F

Warranty

3-year limited warranty
incl. free data recovery service

To receive the 3-year limited warranty, visit our warranty information page and activate your product within 30 days of purchase. The market-specific legal guarantee period comes into force if not activated within this period.

Certifications

CE, RoHS, FCC, UKCA, RCM, REACH, KC

Package content

AV PRO SE CFexpress B v4