BFP 720FESD E6327 Equivalent & Substitute Parts

Part Overview

The BFP 720FESD E6327 is an RF transistor manufactured by Infineon Technologies, classified as a small-signal NPN bipolar junction transistor (BJT) designed for high-frequency applications. This device operates at frequencies up to 45GHz with a maximum collector-emitter breakdown voltage of 4.7V and a power dissipation rating of 100mW. The component is packaged in a 4-TSFP surface mount configuration with a moisture sensitivity level (MSL) of 1 (Unlimited).

The BFP 720FESD E6327 is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this RF transistor.

Substiute Parts

BFP 720FESD E6327

Infineon TechnologiesIn Stock: 654BFP 720FESD E6327 Datasheet

Current PartRFQ

KSP10TA

Fairchild SemiconductorIn Stock: 2174KSP10TA Datasheet

MFR RecommendedRFQ

MRF455

MACOM Technology SolutionsIn Stock: 1824MRF455 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BFP 720FESD E6327 is evaluated based on the following critical parameters that define functional equivalence:

Primary Substitution Criteria:

• Transistor Type: NPN configuration
• Voltage Rating: Collector-emitter breakdown voltage sufficient for circuit requirements
• Frequency Performance: Transition frequency capability for intended RF application
• Power Dissipation: Maximum power rating compatible with thermal design
• DC Current Gain (hFE): Minimum gain specification at specified operating conditions
• Maximum Collector Current: Current handling capability
• Operating Temperature Range: Thermal performance envelope
• Mounting Type and Package: Physical and electrical interface compatibility

Identified Substitute Parts:

The BFP 720FESD E6327 lists two manufacturer-recommended substitutes: MRF455 (MACOM Technology Solutions) and KSP10TA (Fairchild Semiconductor). These parts are evaluated below based on the allowable parameter ranges for RF transistor substitution.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration:

The BFP 720FESD E6327 is classified as obsolete. Both substitute parts (KSP10TA and MRF455) are listed with Active product status, indicating ongoing manufacturer support and availability.

Compliance and Regulatory Status:

All three parts—BFP 720FESD E6327, KSP10TA, and MRF455—carry ECCN classification EAR99, indicating equivalent export control status. The BFP 720FESD E6327 is REACH Unaffected. The MRF455 is ROHS3 Compliant. The KSP10TA compliance status is not specified in the provided data.

Parameter Compatibility Assessment:

The BFP 720FESD E6327 operates at 45GHz transition frequency with a 4.7V maximum collector-emitter breakdown voltage. The KSP10TA operates at 650MHz with a 25V breakdown voltage, representing a significant reduction in frequency performance but higher voltage rating. The MRF455 operates at an unspecified transition frequency with an 18V breakdown voltage and substantially higher power handling (60W versus 100mW).

Substitution Feasibility:

Direct substitution of the BFP 720FESD E6327 with either KSP10TA or MRF455 requires circuit-level evaluation. The frequency performance differential between the BFP 720FESD E6327 (45GHz) and KSP10TA (650MHz) is substantial. The MRF455 is designed for high-power RF applications with significantly different electrical characteristics. Both substitute parts employ different mounting technologies (through-hole and chassis mount, respectively) compared to the surface-mount 4-TSFP package of the original part.

Frequently Asked Questions (FAQ)

Q1: Can the KSP10TA directly replace the BFP 720FESD E6327 in a 45GHz RF circuit?

A: No. The KSP10TA operates at a maximum transition frequency of 650MHz, which is substantially below the 45GHz specification of the BFP 720FESD E6327. This frequency limitation makes the KSP10TA unsuitable for applications requiring 45GHz performance. Additionally, the KSP10TA uses a through-hole TO-92-3 package, whereas the BFP 720FESD E6327 uses a surface-mount 4-TSFP package, requiring different PCB layout and assembly processes.

Q2: Is the MRF455 a suitable substitute for the BFP 720FESD E6327?

A: The MRF455 is an NPN transistor with active product status and EAR99 export classification, matching the BFP 720FESD E6327 in transistor type and regulatory status. However, the MRF455 is designed for high-power RF applications (60W maximum power) with a maximum collector current of 15A, whereas the BFP 720FESD E6327 is a small-signal device (100mW, 30mA maximum). The MRF455 uses a chassis-mount 211-07 package, fundamentally different from the surface-mount 4-TSFP package. Substitution requires complete circuit redesign and is not recommended for direct replacement.

Q3: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Transistor Type (NPN), (2) Voltage Rating (Collector-Emitter Breakdown), (3) Frequency Performance (Transition Frequency), (4) Power Dissipation (Maximum Power Rating), (5) DC Current Gain (hFE), (6) Maximum Collector Current, (7) Operating Temperature Range, and (8) Package/Mounting Type. All parameters must be evaluated within the constraints of the target application circuit.

Q4: Why is the BFP 720FESD E6327 listed as obsolete?

A: The product status reflects manufacturer discontinuation. Obsolete status indicates that the part is no longer in active production and may have limited inventory availability. Active alternatives should be evaluated for new designs or ongoing production requirements.

Q5: Are there packaging considerations when substituting the BFP 720FESD E6327?

A: Yes. The BFP 720FESD E6327 is a surface-mount device in a 4-TSFP package. The KSP10TA is a through-hole TO-92-3 package, and the MRF455 is a chassis-mount 211-07 package. Each package type requires different PCB design, assembly equipment, and thermal management approaches. Package compatibility must be verified before substitution.

Q6: Do all three parts share the same export control classification?

A: Yes. The BFP 720FESD E6327, KSP10TA, and MRF455 all carry ECCN classification EAR99, indicating equivalent export control status under U.S. regulations.