SB0403 Series
Features:
Pair wire coil for high stability
Base PIN terminal treated allowing mounting as is on a PC board
Applications:
Double-balance mixers, broadband transformers, impedance transformers, etc.
Specifications: 
SB0403 Series Balun Transformer
Balun Transformers
SB0402 | SB0403 | SB0503TL | SB0603 | SB0604 | SB0604R | SB0605
Balun Transformers | High Frequency Transformers
High Voltage Spark Transformers | Laminated Transformers | Planar Transformers