RF (radio frequency) SMA cable assembly commonly used in electronics, particularly in the context of small form factor devices such as antennas or wireless modules. Let's break down what each part of your description typically refers to:

1. SMA (F): This stands for SubMiniature version A - Female. SMA connectors are commonly used in RF applications due to their robustness and performance at higher frequencies.

2. St. B/H: This part of the description is a bit less clear without more context. It might refer to a specific type of SMA connector or a variant of the cable assembly.

3. 1.13 mm black Cable (L-10Cm): This specifies the type and length of the cable. "1.13 mm" refers to the diameter of the coaxial cable, which is quite thin and flexible, suitable for short-range RF applications. "L-10Cm" indicates the length of the cable, in this case, 10 centimeters.

4. MHF4 Connector: MHF4 connectors are ultra-miniature coaxial connectors commonly used in applications where space is at a premium, such as in Wi-Fi modules or Bluetooth modules.

Putting it all together, you're describing an RF cable assembly that includes an SMA female connector (possibly a specific variant denoted by "St. B/H") on one end, a 10 cm long 1.13 mm black coaxial cable, and an MHF4 connector on the other end. This type of assembly is often used to connect antennas or wireless modules to circuit boards or other components in devices like laptops, routers, or IoT devices.

If you have specific technical requirements or need further details, it's often helpful to consult with a supplier or manufacturer who specializes in RF components and assemblies.