STAC2942B RF MOSFET Equivalent & Substitute Parts

Part Overview

The STAC2942B is an N-Channel RF MOSFET manufactured by STMicroelectronics, designed for RF applications operating at 175 MHz with a rated output power of 450W. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement continuity. The STAC2942B operates at 50V test voltage with a 40A current rating and 250 mA test current, housed in the STAC244F package configuration.

Substiute Parts

STAC2942B

STMicroelectronicsIn Stock: 769STAC2942B Datasheet

Current PartRFQ

STAC2942BW

STMicroelectronicsIn Stock: 828STAC2942BW Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STAC2942B is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

• Technology: N-Channel MOSFET
• Frequency: 175 MHz
• Voltage - Test: 50 V
• Voltage - Rated: 130 V
• Current Rating: 40 A
• Current - Test: 250 mA
• Power - Output: 450 W

Physical & Compliance Requirements:

• Package / Case: STAC244F
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

The substitute part STAC2942BW maintains identical electrical and mechanical specifications while offering active product status and improved procurement availability.

Parameter Comparison

Engineering Selection Recommendations

The STAC2942BW is a direct functional equivalent to the STAC2942B. Both components share identical electrical specifications, mechanical packaging, and regulatory compliance certifications. The primary distinction is product status: the STAC2942B is obsolete, while the STAC2942BW maintains active product status with STMicroelectronics.

For new designs and ongoing procurement, the STAC2942BW is the appropriate selection. This substitute provides equivalent performance characteristics while ensuring access to current manufacturing support and supply chain continuity. Both parts comply with ROHS3 and REACH requirements, with identical moisture sensitivity ratings and handling requirements.

The STAC2942BW is supplied in Tray packaging, which is standard for production-volume applications of this component category.

Frequently Asked Questions (FAQ)

Q: Can the STAC2942BW directly replace the STAC2942B in existing designs?

A: Yes. The STAC2942BW is electrically and mechanically equivalent to the STAC2942B. All electrical parameters, including frequency response, voltage ratings, current ratings, and output power, are identical. The STAC244F package configuration is the same for both parts.

Q: What is the primary reason for substitution?

A: The STAC2942B is classified as obsolete. The STAC2942BW is the active equivalent part from STMicroelectronics, ensuring continued availability and manufacturing support.

Q: Are there any compliance differences between these parts?

A: No. Both the STAC2942B and STAC2942BW are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1 - Unlimited).

Q: What is the difference in packaging between these parts?

A: The STAC2942B packaging is not specified in the available data. The STAC2942BW is supplied in Tray packaging, which is standard for this component category.

Q: Are the RF performance characteristics identical?

A: Yes. Both parts operate at 175 MHz with 450W output power, 50V test voltage, 40A current rating, and 130V rated voltage. No performance degradation occurs with substitution.

Q: Can I use the STAC2942BW in legacy equipment designed for the STAC2942B?

A: Yes. The STAC2942BW is a direct substitute with identical electrical and mechanical specifications. No circuit modifications are required.