WT41U-E-AI4 Equivalent & Substitute Parts

Part Overview

The WT41U-E-AI4 is an RF transceiver module manufactured by Silicon Labs, designed for Bluetooth 2.1 + EDR applications. This module integrates wireless communication functionality in a compact form factor suitable for embedded systems requiring short-range wireless connectivity.

The WT41U-E-AI4 is classified as Obsolete. Due to its discontinued status, identifying functionally compatible substitute parts is essential for ongoing system support, maintenance, and new design implementations where legacy compatibility or equivalent performance is required.

Substiute Parts

WT41U-E-AI4

Silicon LabsIn Stock: 837WT41U-E-AI4 Datasheet

Current PartRFQ

BT122-A-V2R

Silicon LabsIn Stock: 998BT122-A-V2R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WT41U-E-AI4 is determined by the following critical parameters:

• Manufacturer Alignment: Both the main part and substitute are manufactured by Silicon Labs, ensuring design consistency and support continuity.
• Functional Category: Both parts operate as RF transceiver modules within the Bluetooth protocol family.
• Regulatory Compliance: Identical ECCN (5A992C) and HTSUS (8517.62.0090) classifications confirm equivalent export and tariff treatment.
• Handling Requirements: Matching MSL rating (3, 168 Hours) ensures identical moisture protection and storage protocols.
• Product Availability: The substitute part BT122-A-V2R maintains Active product status, providing long-term supply assurance compared to the Obsolete WT41U-E-AI4.

The BT122-A-V2R represents the recommended manufacturer substitute, offering advanced Bluetooth v4.2 +EDR protocol support while maintaining core transceiver module functionality.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The WT41U-E-AI4 is Obsolete, while the BT122-A-V2R maintains Active status. For new designs, ongoing production, or long-term system support, the BT122-A-V2R is the appropriate selection to ensure sustained component availability and manufacturer support.

Regulatory Compliance: Both parts share identical ECCN and HTSUS classifications, confirming equivalent regulatory treatment for export control and tariff purposes. The BT122-A-V2R additionally carries RoHS Compliance certification, meeting modern environmental standards.

Handling and Storage: Matching MSL ratings (3, 168 Hours) ensure that existing moisture control and storage protocols remain valid for the substitute part, eliminating the need for revised handling procedures.

Manufacturer Continuity: Both parts originate from Silicon Labs, maintaining design ecosystem consistency and reducing integration risk during component substitution.

Frequently Asked Questions (FAQ)

Q: Can the BT122-A-V2R directly replace the WT41U-E-AI4 in existing designs?

A: The BT122-A-V2R is the manufacturer-recommended substitute for the obsolete WT41U-E-AI4. Both parts share identical MSL, ECCN, and HTSUS classifications. However, design integration requires verification of physical form factor compatibility, pin configuration alignment, and protocol-level differences between Bluetooth 2.1 + EDR and Bluetooth v4.2 +EDR implementations.

Q: What are the key differences between these two modules?

A: The primary differences are protocol advancement (Bluetooth 2.1 + EDR versus Bluetooth v4.2 +EDR), packaging format (WT41U-E-AI4 packaging unspecified versus BT122-A-V2R in 20-SMD Module, Tape & Reel), and specified performance parameters (BT122-A-V2R provides documented frequency range, power output, sensitivity, and memory specifications). The BT122-A-V2R also includes RoHS Compliance certification.

Q: Are there any supply chain advantages to using the BT122-A-V2R?

A: Yes. The BT122-A-V2R maintains Active product status with 983 Pcs inventory available, compared to the Obsolete WT41U-E-AI4 with 795 Pcs remaining stock. Active status ensures long-term availability and manufacturer support for future orders.

Q: Do moisture handling requirements differ between these parts?

A: No. Both parts carry identical MSL ratings of 3 (168 Hours), meaning existing moisture control, storage, and handling procedures remain applicable without modification.

Q: Are export or tariff classifications affected by this substitution?

A: No. Both parts share identical ECCN (5A992C) and HTSUS (8517.62.0090) codes, confirming equivalent regulatory treatment for international trade and tariff purposes.