PH3135-5S Equivalent & Substitute Parts

Part Overview

The PH3135-5S is an RF Transistor NPN manufactured by MACOM Technology Solutions, rated for 60V collector-emitter breakdown voltage with 750mA maximum collector current and 5W maximum power dissipation. This device is classified as an active product and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the PH3135-5S reaches end-of-life status, inventory depletion occurs, or when application requirements align with alternative device specifications. The substitute parts listed below maintain NPN transistor topology and core RF functionality while operating within different electrical and thermal parameters.

Substiute Parts

PH3135-5S

MACOM Technology SolutionsIn Stock: 827PH3135-5S Datasheet

Current PartRFQ

2SC5490A-TL-H

onsemiIn Stock: 10982SC5490A-TL-H Datasheet

MFR RecommendedRFQ

BFP620FH7764XTSA1

Infineon TechnologiesIn Stock: 5428BFP620FH7764XTSA1 Datasheet

MFR RecommendedRFQ

MCH4009-TL-H

onsemiIn Stock: 34592MCH4009-TL-H Datasheet

MFR RecommendedRFQ

MMBT918LT1G

onsemiIn Stock: 60245MMBT918LT1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the PH3135-5S is based on the following criteria derived from provided specifications:

Primary Substitution Criteria:

• Transistor Type: NPN topology required
• Voltage Rating: Collector-emitter breakdown voltage must support application requirements
• Current Capability: Maximum collector current must meet or exceed circuit demands
• Power Dissipation: Maximum power rating must accommodate thermal requirements
• Compliance: ROHS3 compliance and MSL rating must match or exceed original specification

Substitute Parts Classification:

The four substitute parts listed (MMBT918LT1G, MCH4009-TL-H, BFP620FH7764XTSA1, 2SC5490A-TL-H) are NPN RF transistors with varying electrical characteristics. Each operates within different voltage, current, frequency, and power parameters. Substitution feasibility depends on whether the target application can operate within the electrical constraints of each alternative device.

Parameter Comparison

Engineering Selection Recommendations

MMBT918LT1G (onsemi)

This device is suitable for applications requiring lower voltage operation (15V maximum) and moderate current levels (50mA maximum). The MMBT918LT1G is an active product with ROHS3 compliance and unlimited MSL rating. Operating temperature range extends to -55°C, providing broader thermal operating window than other substitutes. This part is appropriate for low-power RF applications operating below 15V supply voltage.

MCH4009-TL-H (onsemi)

The MCH4009-TL-H operates at 3.5V maximum voltage with 40mA maximum collector current and 120mW power dissipation. This device is active and ROHS3 compliant. Substitution is limited to applications with very low voltage requirements and minimal power budgets. The 25GHz transition frequency supports higher-frequency RF applications compared to the MMBT918LT1G.

BFP620FH7764XTSA1 (Infineon Technologies)

This device operates at 2.8V maximum voltage with 80mA maximum collector current and 185mW power dissipation. The BFP620FH7764XTSA1 is an active product with ROHS3 compliance and REACH unaffected status. The 65GHz transition frequency supports ultra-high-frequency RF applications. Substitution is limited to applications with very low voltage requirements and high-frequency operation.

2SC5490A-TL-H (onsemi)

This device is classified as obsolete and operates at 10V maximum voltage with 30mA maximum collector current and 100mW power dissipation. Although ROHS3 compliant, the obsolete status indicates limited future availability. Substitution should be considered only when inventory is available and long-term supply is not a concern.

Frequently Asked Questions (FAQ)

Q: Can the PH3135-5S be directly replaced with MMBT918LT1G?

A: Direct replacement is possible only if the application operates at 15V or lower supply voltage and requires 50mA or less collector current. The MMBT918LT1G has significantly lower power dissipation (225mW versus 5W), so thermal design must be re-evaluated. Package differences (SOT-23-3 versus original package) require PCB layout modification.

Q: What is the primary limitation when substituting with MCH4009-TL-H or BFP620FH7764XTSA1?

A: Both devices operate at very low maximum voltages (3.5V and 2.8V respectively), making them unsuitable for applications requiring the PH3135-5S's 60V rating. These substitutes are only viable for low-voltage RF circuits. Current and power capabilities are also significantly reduced.

Q: Why is 2SC5490A-TL-H listed as a substitute if it is obsolete?

A: The 2SC5490A-TL-H is included because it was specified in the original substitute list provided. However, its obsolete status means inventory may be limited and future procurement is uncertain. Active alternatives (MMBT918LT1G, MCH4009-TL-H, BFP620FH7764XTSA1) are preferred for new designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All four substitute parts (MMBT918LT1G, MCH4009-TL-H, BFP620FH7764XTSA1, 2SC5490A-TL-H) are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), matching the original PH3135-5S compliance status.

Q: What package types are used for the substitute parts?

A: MMBT918LT1G uses SOT-23-3 (TO-236) surface mount package. MCH4009-TL-H uses SOT-343F (4-MCPH) surface mount package. BFP620FH7764XTSA1 uses 4-SMD flat leads (4-TSFP) surface mount package. 2SC5490A-TL-H uses SC-81 (3-SSFP) surface mount package. All are surface mount devices, differing from the original PH3135-5S packaging.

Q: Which substitute part has the highest operating temperature rating?

A: The PH3135-5S has the highest maximum junction temperature at 200°C. All substitute parts are rated to 150°C maximum junction temperature (MMBT918LT1G extends to -55°C minimum). Applications requiring operation above 150°C cannot use these substitutes.

Q: Can multiple substitute parts be used interchangeably in the same circuit?

A: No. Each substitute part has distinct electrical characteristics (voltage, current, power, frequency). Circuit design must be validated for the specific substitute part selected. Interchangeability is not supported due to parameter differences.