PRF947,115 Equivalent & Substitute Parts

Part Overview

The PRF947,115 is an RF Transistor NPN manufactured by NXP USA Inc., designed for high-frequency applications up to 8.5GHz with a maximum power dissipation of 250mW. This device features a 10V collector-emitter breakdown voltage and is packaged in the SC-70 surface mount configuration. The PRF947,115 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts must maintain compatibility with the electrical performance envelope and physical mounting requirements of the original device.

Substiute Parts

PRF947,115

NXP USA Inc.In Stock: 1050PRF947,115 Datasheet

Current PartRFQ

BFU530R

NXP USA Inc.In Stock: 1329BFU530R Datasheet

MFR RecommendedRFQ

2SC4726TLP

Rohm SemiconductorIn Stock: 151012SC4726TLP Datasheet

MFR RecommendedRFQ

2SC5646A-TL-H

onsemiIn Stock: 83822SC5646A-TL-H Datasheet

MFR RecommendedRFQ

BFP540ESDH6327XTSA1

Infineon TechnologiesIn Stock: 1480BFP540ESDH6327XTSA1 Datasheet

MFR RecommendedRFQ

BFP760H6327XTSA1

Infineon TechnologiesIn Stock: 800347BFP760H6327XTSA1 Datasheet

MFR RecommendedRFQ

MRF317

MACOM Technology SolutionsIn Stock: 1357MRF317 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PRF947,115 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Transistor Type: NPN configuration required
• Voltage Rating: Collector-emitter breakdown voltage must equal or exceed 10V
• Frequency Performance: Transition frequency must support 8.5GHz operation
• Power Dissipation: Maximum power rating must accommodate 250mW
• Current Capability: Collector current rating must support 50mA maximum
• DC Current Gain: hFE performance must meet or exceed 50 @ specified conditions
• Mounting: Surface mount configuration required
• Compliance: RoHS3 compliance required

Secondary Compatibility Factors:

• Package footprint compatibility (SC-70 or equivalent surface mount packages)
• Noise figure performance in the 1GHz to 2GHz range
• Operating temperature range compatibility

Substitute parts are grouped based on their ability to meet these parameters within the allowed electrical and mechanical specifications for RF NPN transistor applications.

Parameter Comparison

Engineering Selection Recommendations

BFU530R (NXP USA Inc.) BFU530R is an active product with enhanced electrical performance across multiple parameters. It exceeds the PRF947,115 in voltage rating (12V vs. 10V), frequency capability (11GHz vs. 8.5GHz), power dissipation (450mW vs. 250mW), and current handling (40mA vs. 50mA). The device carries AEC-Q101 automotive qualification and maintains ROHS3 compliance. Package transition from SC-70 to SOT-143B requires PCB layout modification. This substitute is suitable for applications requiring improved performance margins and long-term supply continuity.

2SC4726TLP (Rohm Semiconductor) 2SC4726TLP is an active product with 15,000 units in stock, providing excellent availability. Voltage rating (11V) and current capability (50mA) match the original specification. However, transition frequency (3.2GHz) is significantly lower than the PRF947,115 (8.5GHz), limiting this substitute to lower-frequency RF applications. Power dissipation (150mW) is reduced. Package change from SC-70 to EMT3 requires layout modification. This substitute is applicable only for designs operating below 3.2GHz.

2SC5646A-TL-H (onsemi) 2SC5646A-TL-H is classified as obsolete, matching the status of the original part. Voltage rating (4V) is insufficient for direct substitution in 10V applications. Transition frequency (10GHz ~ 12.5GHz) exceeds the original specification. Current capability (30mA) is reduced. This device is not recommended as a primary substitute due to voltage incompatibility and obsolete status.

BFP540ESDH6327XTSA1 (Infineon Technologies) BFP540ESDH6327XTSA1 is an active product with superior frequency performance (30GHz vs. 8.5GHz) and enhanced current capability (80mA vs. 50mA). Voltage rating (5V) is below the original 10V specification, restricting application scope. Power dissipation (250mW) matches the original. Package transition from SC-70 to SOT-343 requires layout modification. This substitute is suitable for high-frequency applications where voltage constraints are acceptable.

BFP760H6327XTSA1 (Infineon Technologies) BFP760H6327XTSA1 is an active product with exceptional frequency performance (45GHz) and high current capability (70mA). Voltage rating (4V) is below the original 10V specification. Power dissipation (240mW) is comparable. This device is optimized for ultra-high-frequency applications where voltage constraints are acceptable. Package transition from SC-70 to SOT-343 requires layout modification.

MRF317 (MACOM Technology Solutions) MRF317 is an active product with significantly different electrical characteristics. Voltage rating (35V) substantially exceeds the original specification. Power dissipation (100W) is dramatically higher, indicating a device designed for high-power applications. Current capability (12A) far exceeds the original (50mA). Mounting type (Chassis Mount) differs fundamentally from the surface mount requirement. This device is not suitable as a direct substitute due to form factor incompatibility and application class mismatch.

Frequently Asked Questions (FAQ)

Q: Can BFU530R directly replace PRF947,115 without PCB modifications?

A: No. While BFU530R meets or exceeds all electrical parameters, the package transition from SC-70 (SOT-323) to SOT-143B requires PCB footprint modification. Pin configuration and spacing differ between these packages.

Q: Is 2SC4726TLP suitable for 8.5GHz applications?

A: No. The transition frequency of 2SC4726TLP is 3.2GHz, which is insufficient for 8.5GHz operation. This substitute is limited to applications operating below 3.2GHz.

Q: Why is MRF317 listed as a substitute if it is a chassis mount device?

A: MRF317 is included in the manufacturer's substitute list but is not functionally equivalent due to mounting type incompatibility. It is a high-power device designed for different application classes and cannot replace the PRF947,115 in surface mount configurations.

Q: What is the voltage limitation for BFP540ESDH6327XTSA1 and BFP760H6327XTSA1?

A: Both devices have maximum collector-emitter breakdown voltages of 5V and 4V respectively, compared to the original 10V specification. These substitutes are restricted to applications where the operating voltage does not exceed their rated limits.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, matching the environmental and regulatory status of the original PRF947,115.

Q: Which substitute offers the best overall compatibility with the original PRF947,115?

A: BFU530R provides the closest electrical performance match with enhanced specifications across voltage, frequency, and power parameters. It is an active product with automotive qualification (AEC-Q101), ensuring long-term availability and supply chain stability. Package modification is required.

Q: Can 2SC5646A-TL-H be used as a substitute despite being obsolete?

A: 2SC5646A-TL-H is not recommended. It shares obsolete status with the original part and has insufficient voltage rating (4V vs. 10V), creating additional supply and compatibility risks.

Q: What is the primary consideration when selecting between BFP540ESDH6327XTSA1 and BFP760H6327XTSA1?

A: Both devices have voltage ratings below the original specification (5V and 4V respectively). Selection depends on frequency requirements: BFP540ESDH6327XTSA1 operates to 30GHz, while BFP760H6327XTSA1 extends to 45GHz. Both require voltage constraint verification in the target application.