SD1433 RF Transistor NPN Equivalent & Substitute Parts

Part Overview

The SD1433 is an RF Transistor NPN manufactured by STMicroelectronics, rated for 16V collector-emitter breakdown voltage with a maximum power dissipation of 58W. This component features a chassis stud mount M122 package configuration and is designed for RF applications requiring high power handling. The SD1433 is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Substiute Parts

SD1433

STMicroelectronicsIn Stock: 1130SD1433 Datasheet

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2N918 PBFREE

Central Semiconductor CorpIn Stock: 18392N918 PBFREE Datasheet

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BFP405H6327XTSA1

Infineon TechnologiesIn Stock: 40407BFP405H6327XTSA1 Datasheet

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JANTX2N5109

Microsemi CorporationIn Stock: 5787JANTX2N5109 Datasheet

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MT3S16U(TE85L,F)

Toshiba Semiconductor and StorageIn Stock: 4003MT3S16U(TE85L,F) Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SD1433 RF Transistor NPN is determined by the following critical parameters: transistor type (NPN), voltage rating (Collector-Emitter Breakdown), maximum power dissipation, maximum collector current, DC current gain characteristics, and operating temperature range. The SD1433 operates at high power levels (58W) with moderate voltage (16V) and current (2.5A) specifications, requiring substitutes that maintain these electrical characteristics within acceptable tolerances.

The substitute parts listed below are grouped based on their ability to meet the core electrical requirements of the SD1433. However, significant differences exist in packaging, mounting type, frequency response, and power handling capabilities. The following substitute parts are provided from the original manufacturer's cross-reference list:

Substitute Parts:

• MT3S16U(TE85L,F) - Toshiba Semiconductor and Storage
• BFP405H6327XTSA1 - Infineon Technologies
• 2N918 PBFREE - Central Semiconductor Corp
• JANTX2N5109 - Microsemi Corporation

Parameter Comparison

Engineering Selection Recommendations

Product Status Considerations:

The SD1433 is classified as obsolete. All substitute parts listed (MT3S16U(TE85L,F), BFP405H6327XTSA1, 2N918 PBFREE, and JANTX2N5109) are classified as active products, ensuring ongoing availability and manufacturing support.

Compliance and Certification:

The SD1433 is ROHS3 compliant and REACH unaffected. Among the substitute parts:

• MT3S16U(TE85L,F) is RoHS Compliant
• BFP405H6327XTSA1 is ROHS3 Compliant
• 2N918 PBFREE is ROHS3 Compliant
• JANTX2N5109 is RoHS non-compliant

For applications requiring RoHS compliance, MT3S16U(TE85L,F) and BFP405H6327XTSA1 are suitable selections. For applications requiring ROHS3 compliance specifically, BFP405H6327XTSA1 and 2N918 PBFREE are appropriate.

Electrical Parameter Alignment:

The SD1433 operates at 16V maximum collector-emitter breakdown voltage with 2.5A maximum collector current and 58W power dissipation. The substitute parts exhibit significantly lower power ratings and current handling capabilities:

• MT3S16U(TE85L,F): 5V, 60mA, 100mW
• BFP405H6327XTSA1: 5V, 25mA, 75mW
• 2N918 PBFREE: 15V, 50mA, 200mW
• JANTX2N5109: Specifications not provided

The 2N918 PBFREE provides the closest voltage rating match at 15V. However, all substitute parts operate at significantly reduced power and current levels compared to the SD1433.

Packaging and Mounting:

The SD1433 uses a chassis stud mount M122 package. The substitute parts employ different mounting technologies:

• MT3S16U(TE85L,F) and BFP405H6327XTSA1 use surface mount packages (SC-70 and SOT-343 respectively)
• 2N918 PBFREE and JANTX2N5109 use through-hole metal can packages (TO-72 and TO-39 respectively)

Circuit board redesign is required for any substitution due to incompatible mounting interfaces.

Frequently Asked Questions (FAQ)

Q: Can the SD1433 be directly replaced with any of the listed substitute parts?

A: Direct replacement is not possible. The SD1433 uses a chassis stud mount M122 package, while all substitute parts employ different mounting technologies (surface mount or through-hole). Circuit board redesign is required for any substitution.

Q: Which substitute part most closely matches the SD1433 electrical specifications?

A: The 2N918 PBFREE provides the closest voltage rating match at 15V collector-emitter breakdown voltage, compared to the SD1433 at 16V. However, the 2N918 PBFREE is rated for only 200mW power dissipation and 50mA maximum collector current, significantly lower than the SD1433 specifications of 58W and 2.5A respectively.

Q: Are all substitute parts RoHS compliant?

A: No. The JANTX2N5109 is RoHS non-compliant. The MT3S16U(TE85L,F) is RoHS Compliant, and both BFP405H6327XTSA1 and 2N918 PBFREE are ROHS3 Compliant. For applications requiring specific RoHS compliance levels, verify the compliance status against your system requirements.

Q: What are the key differences between the substitute parts?

A: The substitute parts differ significantly in voltage rating, power handling, current capacity, frequency response, and package type. The 2N918 PBFREE operates at 15V with 600MHz frequency response. The BFP405H6327XTSA1 operates at 5V but supports 25GHz frequency response. The MT3S16U(TE85L,F) operates at 5V with 4GHz frequency response. The JANTX2N5109 specifications are incomplete in the available data.

Q: Can the SD1433 be used in high-frequency RF applications?

A: The SD1433 transition frequency is not specified in the available data. Among the substitute parts, the BFP405H6327XTSA1 supports the highest frequency at 25GHz, followed by MT3S16U(TE85L,F) at 4GHz, and 2N918 PBFREE at 600MHz.

Q: What is the operating temperature range for each part?

A: The SD1433 operates up to 200°C junction temperature. The 2N918 PBFREE supports the widest temperature range at -65°C to 200°C. The BFP405H6327XTSA1 operates up to 150°C, and the MT3S16U(TE85L,F) operates up to 125°C. The JANTX2N5109 operating temperature is not specified.

Q: Are these substitute parts available in inventory?

A: All substitute parts are listed as active products with inventory availability: MT3S16U(TE85L,F) has 3991 pieces, BFP405H6327XTSA1 has 40333 pieces, 2N918 PBFREE has 1800 pieces, and JANTX2N5109 has 5749 pieces in stock.