BFP540FESDE6327 Equivalent & Substitute Parts

Part Overview

The BFP540FESDE6327 is an RF transistor manufactured by Infineon Technologies, classified as an NPN bipolar junction transistor (BJT) designed for high-frequency applications. This device operates at frequencies up to 30GHz with a maximum collector-emitter breakdown voltage of 5V and maximum power dissipation of 250mW. The part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

BFP540FESDE6327

Infineon TechnologiesIn Stock: 2131BFP540FESDE6327 Datasheet

Current PartRFQ

MT3S16U(TE85L,F)

Toshiba Semiconductor and StorageIn Stock: 4003MT3S16U(TE85L,F) Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BFP540FESDE6327 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Transistor type must be NPN
• Voltage - Collector Emitter Breakdown (Max) must be ≥5V
• Frequency - Transition must support the application frequency range
• Power - Max must be ≥250mW for thermal margin
• Current - Collector (Ic) (Max) must be ≥80mA
• Operating Temperature must be ≥150°C

Mechanical Compatibility Criteria:

• Mounting type must be Surface Mount
• Package must accommodate 4-lead surface mount configuration

The MT3S16U(TE85L,F) from Toshiba Semiconductor and Storage is identified as a manufacturer-recommended substitute. However, this part exhibits significant deviations in frequency capability (4GHz versus 30GHz) and power rating (100mW versus 250mW), indicating it functions as a substitute only for applications where these reduced specifications are acceptable.

Parameter Comparison

Engineering Selection Recommendations

The BFP540FESDE6327 is obsolete, requiring component substitution for new procurement. The MT3S16U(TE85L,F) is the manufacturer-recommended alternative and carries Active product status with RoHS compliance certification, supporting long-term availability and regulatory alignment.

Selection of MT3S16U(TE85L,F) is appropriate only when application requirements permit operation within its reduced electrical specifications: maximum frequency of 4GHz (versus 30GHz), maximum power of 100mW (versus 250mW), and maximum collector current of 60mA (versus 80mA). The operating temperature maximum of 125°C (versus 150°C) also represents a constraint.

For applications requiring the full 30GHz frequency capability and 250mW power rating of the original BFP540FESDE6327, alternative high-frequency RF transistors from active product lines must be evaluated against the same electrical and mechanical criteria.

Frequently Asked Questions (FAQ)

Q: Can MT3S16U(TE85L,F) directly replace BFP540FESDE6327 in all applications?

A: No. The MT3S16U(TE85L,F) operates at maximum 4GHz frequency and 100mW power, compared to the BFP540FESDE6327 specifications of 30GHz and 250mW. Direct substitution is limited to applications operating within these reduced parameters.

Q: What is the significance of the package difference between 4-TSFP and SC-70?

A: Both are surface mount packages, but they have different physical footprints and lead configurations. PCB layout modifications are required when substituting between these packages. The 4-TSFP uses flat leads while SC-70 (SOT-323) uses gull-wing leads.

Q: Why is the BFP540FESDE6327 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Existing inventory may be available from authorized distributors, but long-term supply cannot be guaranteed. Substitution planning is necessary for designs requiring ongoing component availability.

Q: Does RoHS compliance of MT3S16U(TE85L,F) affect compatibility?

A: RoHS compliance is a regulatory advantage for the Toshiba part, supporting compliance with environmental directives. This does not affect electrical or mechanical compatibility but may be a requirement for certain applications or markets.

Q: What parameters must be verified before selecting a substitute?

A: Verify that the substitute meets or exceeds: transistor type (NPN), voltage rating (≥5V), frequency capability (application requirement), power rating (≥250mW for thermal margin), collector current (≥80mA), operating temperature (≥150°C), and mounting type (surface mount). Package compatibility with existing PCB layout must also be confirmed.