2SC5946G0L Equivalent & Substitute Parts

Part Overview

The 2SC5946G0L is an RF transistor manufactured by Panasonic Electronic Components, classified as a surface mount NPN bipolar junction transistor (BJT) designed for RF applications. This device operates at a maximum collector-emitter voltage of 20V with a maximum collector current of 50mA and a transition frequency of 1.6GHz, delivering up to 100mW of power dissipation. The part is packaged in SOT-723 (SSSMini3-F2) form factor.

The 2SC5946G0L 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

2SC5946G0L

Panasonic Electronic ComponentsIn Stock: 104952SC5946G0L Datasheet

Current PartRFQ

2SC5661T2LP

Rohm SemiconductorIn Stock: 805032SC5661T2LP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SC5946G0L is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Transistor Type: NPN configuration
• Voltage - Collector Emitter Breakdown (Max): 20V minimum
• Current - Collector (Ic) (Max): 50mA minimum
• Package / Case: SOT-723 form factor
• Mounting Type: Surface Mount

Performance Parameters:

• Frequency - Transition: 1.6GHz or higher
• Power - Max: 100mW or higher
• Operating Temperature: 125°C or higher

The 2SC5661T2LP manufactured by Rohm Semiconductor meets all critical matching parameters and exceeds several performance specifications, qualifying it as a direct substitute for the obsolete 2SC5946G0L.

Parameter Comparison

Engineering Selection Recommendations

The 2SC5661T2LP is suitable as a substitute for the obsolete 2SC5946G0L based on the following factors:

Electrical Compatibility: Both devices share identical maximum voltage ratings (20V) and maximum collector current specifications (50mA). The 2SC5661T2LP operates at 1.5GHz transition frequency, which is within acceptable range for RF applications previously served by the 1.6GHz 2SC5946G0L. The 2SC5661T2LP provides superior power dissipation capability (150mW versus 100mW), offering additional thermal margin.

Mechanical Compatibility: Both transistors utilize the SOT-723 package form factor with surface mount configuration, ensuring direct PCB footprint compatibility without layout modifications.

Product Status and Compliance: The 2SC5661T2LP is listed as active product status, ensuring ongoing availability and supply chain support. The device is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements. Both devices carry identical ECCN and HTSUS classifications.

Thermal Performance: The 2SC5661T2LP supports a maximum junction temperature of 150°C compared to 125°C for the 2SC5946G0L, providing enhanced thermal headroom in operating environments.

Frequently Asked Questions (FAQ)

Q: Can the 2SC5661T2LP directly replace the 2SC5946G0L without PCB modifications?

A: Yes. Both devices are packaged in SOT-723 form factor with identical pinout configuration and surface mount mounting type. No PCB layout changes are required for mechanical substitution.

Q: What is the difference in transition frequency between these devices?

A: The 2SC5946G0L operates at 1.6GHz transition frequency, while the 2SC5661T2LP operates at 1.5GHz. For RF applications operating below 1.5GHz, the 2SC5661T2LP provides equivalent performance. Applications requiring operation above 1.5GHz require circuit-level evaluation.

Q: Are there differences in DC current gain between these transistors?

A: Yes. The 2SC5946G0L specifies a minimum DC current gain (hFE) of 25 @ 2mA, 10V. The 2SC5661T2LP specifies a minimum DC current gain (hFE) of 82 @ 10mA, 10V. These measurements are taken at different operating points and require circuit-level analysis to determine impact on bias network design.

Q: Does the 2SC5661T2LP provide better thermal performance?

A: The 2SC5661T2LP supports maximum junction temperature of 150°C and maximum power dissipation of 150mW, compared to 125°C and 100mW for the 2SC5946G0L. This provides enhanced thermal margin in high-power RF applications.

Q: What is the product status difference between these parts?

A: The 2SC5946G0L is obsolete, indicating discontinued manufacturing and limited availability. The 2SC5661T2LP is active product status, ensuring ongoing production and supply chain availability for new designs and production requirements.

Q: Are both devices moisture sensitive?

A: Both devices carry Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or reflow processing.