AT-31011-TR2G Equivalent & Substitute Parts

Part Overview

The AT-31011-TR2G is an RF Transistor NPN manufactured by Broadcom Limited, designed for RF applications operating at 5.5V with a maximum power dissipation of 150mW. This device features a noise figure of 0.9dB to 1.2dB at 900MHz and a gain of 11dB to 13dB, packaged in SOT-143 surface mount configuration. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for design continuity and procurement planning.

Substiute Parts

AT-31011-TR2G

Broadcom LimitedIn Stock: 904AT-31011-TR2G Datasheet

Current PartRFQ

2SC5226A-5-TL-E

onsemiIn Stock: 41452SC5226A-5-TL-E Datasheet

MFR RecommendedRFQ

BF771E6327HTSA1

Infineon TechnologiesIn Stock: 2836BF771E6327HTSA1 Datasheet

MFR RecommendedRFQ

BFP740H6327XTSA1

Infineon TechnologiesIn Stock: 14285BFP740H6327XTSA1 Datasheet

MFR RecommendedRFQ

PH3135-5S

MACOM Technology SolutionsIn Stock: 827PH3135-5S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT-31011-TR2G is determined by the following critical parameters:

Primary Substitution Criteria:

• Transistor Type: NPN configuration required
• Voltage Rating: Collector-Emitter breakdown voltage must equal or exceed 5.5V
• Power Dissipation: Maximum power rating must support 150mW or greater
• Current Capability: Collector current (Ic) must accommodate 16mA maximum
• Operating Temperature: Must support 150°C junction temperature minimum
• Mounting Type: Surface mount configuration required
• Noise Performance: Noise figure and gain characteristics within acceptable RF application ranges

The substitute parts listed below meet these electrical and mechanical requirements while offering enhanced specifications in certain parameters. Substitution is valid when the substitute part's ratings equal or exceed the AT-31011-TR2G specifications across all critical parameters.

Parameter Comparison

Engineering Selection Recommendations

2SC5226A-5-TL-E (onsemi)

This substitute meets all critical electrical requirements with voltage rating of 10V exceeding the 5.5V requirement and identical 150mW power rating. The part is active in production status with ROHS3 compliance. Package configuration differs (3-MCP versus SOT-143), requiring PCB layout verification. Current capability of 70mA provides margin above the 16mA requirement. Noise figure of 1dB at 1GHz and gain of 12dB align with original specifications.

BF771E6327HTSA1 (Infineon Technologies)

This substitute exceeds all electrical parameters with 12V voltage rating, 580mW power capability, and 80mA collector current. Active product status with ROHS3 compliance ensures long-term availability. Package differs (PG-SOT23 versus SOT-143), requiring PCB redesign. Noise figure range of 1dB to 1.6dB and gain range of 10dB to 15dB encompass original specifications. Higher power rating provides thermal margin for demanding applications.

BFP740H6327XTSA1 (Infineon Technologies)

This substitute operates at 4.7V collector-emitter breakdown, which is below the 5.5V requirement of the original part. While power rating of 160mW and collector current of 30mA exceed requirements, the lower voltage rating restricts application to circuits operating below 4.7V. Active product status with ROHS3 compliance is confirmed. Package differs (PG-SOT343-4-2 versus SOT-143). Superior noise figure of 0.5dB to 0.85dB and high gain of 27dB suit low-noise RF applications within voltage constraints.

PH3135-5S (MACOM Technology Solutions)

This substitute is suitable only for applications requiring significantly higher power dissipation (5W) and collector current (750mA). The 60V voltage rating far exceeds the 5.5V requirement, positioning this part for high-voltage RF power applications rather than direct replacement. Package and mounting type are not specified, requiring manufacturer consultation. ROHS3 compliance is confirmed. This part represents a different application class and is not recommended for direct substitution in standard 5.5V RF circuits.

Frequently Asked Questions (FAQ)

Q: Can the 2SC5226A-5-TL-E directly replace the AT-31011-TR2G without PCB modification?

A: No. While electrical parameters are compatible, the package differs (3-MCP/SOT-323 versus SOT-143). PCB footprint and layout must be verified and modified accordingly. Pin configuration and spacing differ between packages.

Q: What is the primary reason the AT-31011-TR2G requires substitution?

A: The AT-31011-TR2G is classified as obsolete. Broadcom Limited has discontinued this product, making it unavailable for new production orders. Active substitute parts ensure design continuity and long-term supply chain reliability.

Q: Is the BFP740H6327XTSA1 suitable for all AT-31011-TR2G applications?

A: No. The BFP740H6327XTSA1 has a maximum collector-emitter breakdown voltage of 4.7V, which is below the original 5.5V specification. This part is suitable only for circuits operating at or below 4.7V. Verify circuit voltage requirements before selection.

Q: Which substitute offers the best noise performance?

A: The BFP740H6327XTSA1 provides the lowest noise figure at 0.5dB to 0.85dB across 1.8GHz to 6GHz, compared to the original 0.9dB to 1.2dB at 900MHz. However, voltage rating constraints must be considered for application compatibility.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts (2SC5226A-5-TL-E, BF771E6327HTSA1, BFP740H6327XTSA1, and PH3135-5S) are ROHS3 compliant. The original AT-31011-TR2G RoHS status is not specified due to its obsolete status.

Q: What is the impact of package differences on circuit design?

A: Package differences require PCB footprint redesign, trace routing modification, and thermal management reassessment. The SOT-143 original package differs from 3-MCP, PG-SOT23, and PG-SOT343-4-2 alternatives. Consult package datasheets for pin assignments and mechanical dimensions before layout changes.

Q: Can the PH3135-5S be used in place of the AT-31011-TR2G?

A: The PH3135-5S is not recommended for direct substitution. This part is designed for high-power RF applications (5W, 750mA) with 60V rating, representing a different application class. Use only when circuit requirements specifically demand high-power capability.

Q: Which substitute provides the closest electrical match to the original part?

A: The 2SC5226A-5-TL-E offers the closest match with identical 150mW power rating, comparable noise figure (1dB at 1GHz), and gain of 12dB within the original 11dB to 13dB range. Voltage rating of 10V provides margin above 5.5V requirement.

Q: What compliance certifications are relevant for substitute selection?

A: All active substitute parts carry REACH Unaffected status and ROHS3 compliance. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no special moisture handling requirements. ECCN classification is EAR99 for all parts, confirming standard export compliance.