# BMI-S-203-F (Component) ## Description RF Shield Frame 1.032" (26.21mm) X 1.032" (26.21mm) Surface Mount The BMI-S-203-F is a surface-mount EMI shield frame (part of a board-level shielding system) manufactured by Laird (now part of DuPont Performance Materials). It is used to enclose and isolate sensitive components on a PCB, helping prevent signal interference and improving electromagnetic compatibility (EMC). It typically comes as a one-piece or frame-style shield that is soldered directly onto the PCB, forming a metallic “cage” over critical circuits. Key Characteristics Product Type: Board-level EMI/RFI shielding enclosure Shield Style: Surface-mount frame (soldered to PCB) Dimensions: ~26.21 mm × 26.21 mm × 5.08 mm Construction Material: Typically cold rolled steel or similar conductive metal Finish: Tin-plated for good solderability Mounting: SMT (surface mount technology) Configuration: Designed for use with cover lids or as part of a two-piece shielding system Function Blocks unwanted electromagnetic interference (EMI) Prevents RF noise from affecting nearby sensitive circuits Improves signal integrity in high-speed or RF designs Helps meet EMC regulatory requirements Typical Applications RF modules and wireless circuits IoT devices Smartphones and compact electronics Communication systems High-speed digital and mixed-signal PCBs #RF-shield #SMT 2 Piece ## Component Details - **Owner:** adrian95 - **Created:** 4/23/2026 - **Last Updated:** 4/23/2026 - **Visibility:** Public - **Manufacturer Part Number:** BMI-S-203-F - **Part Type:** RF Shield - **License:** https://creativecommons.org/licenses/by/4.0/ - **Manufacturer Name:** Laird - **Datasheet URL:** https://media.digikey.com/pdf/Data%20Sheets/Laird%20Technologies/BMI-S-203.pdf - **Part Type:** Other - **Manufacturer:** Laird - **MPN:** BMI-S-203-F - **Mount Type:** Surface Mount - **Package / Case Code:** TO - **Pin Count:** 20 ## Pins | Pin | Name | Type | |-----|------|------| | 1 | 1 | | | 2 | 2 | | | 3 | 3 | | | 4 | 4 | | | 5 | 5 | | | 6 | 6 | | | 7 | 7 | | | 8 | 8 | | | 9 | 9 | | | 10 | 10 | | | 11 | 11 | | | 12 | 12 | | | 13 | 13 | | | 14 | 14 | | | 15 | 15 | | | 16 | 16 | | | 17 | 17 | | | 18 | 18 | | | 19 | 19 | | | 20 | 20 | | --- *Generated from [https://www.flux.ai/adrian95/bmi-s-203-f](https://www.flux.ai/adrian95/bmi-s-203-f)*