STTH3006TPI Equivalent & Substitute Parts

Part Overview

The STTH3006TPI is a general-purpose diode array manufactured by STMicroelectronics, configured as 1 pair series connection with a maximum reverse voltage rating of 600 V and average rectified current of 30 A per diode. The device is packaged in a TOP-3 insulated through-hole configuration and is classified as obsolete. Due to its obsolete status, identification of equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production and repair applications.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Series Connection
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io) (per Diode)	30 A
Voltage - Forward (Vf) (Max) @ If	3.6 V @ 30 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	45 ns
Current - Reverse Leakage @ Vr	40 µA @ 600 V
Operating Temperature - Junction (Max)	150°C
Mounting Type	Through Hole
Package / Case	TOP-3 Insulated
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the STTH3006TPI is determined by the following critical parameters that must remain constant or be derated appropriately:

Fixed Parameters (Must Match):

Diode configuration: 1 pair series connection
Voltage rating: 600 V DC reverse maximum
Mounting type: Through hole
Package type: TOP-3 insulated
Technology: Standard fast recovery

Derated Parameters (Allowed to Decrease):

Current - Average Rectified (Io): The STTH3006TPI operates at 30 A. Substitute parts with lower current ratings are acceptable only when circuit design permits operation at reduced current capacity.
Reverse recovery time (trr): Lower values are acceptable; higher values require circuit validation.
Reverse leakage current: Lower values are acceptable; higher values require thermal and reliability assessment.

The STTH1506TPI meets the fixed parameter requirements and is classified as an active product, making it a valid substitute for applications where the 15 A current rating is sufficient.

Parameter Comparison

Parameter	STTH3006TPI (Main Part)	STTH1506TPI (Substitute)
Manufacturer	STMicroelectronics	STMicroelectronics
Category	Diodes, Rectifiers	Diodes, Rectifiers
Diode Configuration	1 Pair Series Connection	1 Pair Series Connection
Voltage - DC Reverse (Vr) (Max)	600 V	600 V
Current - Average Rectified (Io) (per Diode)	30 A	15 A
Voltage - Forward (Vf) (Max) @ If	3.6 V @ 30 A	3.6 V @ 15 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	45 ns	35 ns
Current - Reverse Leakage @ Vr	40 µA @ 600 V	20 µA @ 600 V
Operating Temperature - Junction (Max)	150°C	150°C
Mounting Type	Through Hole	Through Hole
Package / Case	TOP-3 Insulated	TOP-3 Insulated
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The STTH1506TPI is a direct substitute for the STTH3006TPI in applications where the circuit design operates at or below 15 A average rectified current per diode. The substitute part offers the following advantages:

Product Status: The STTH1506TPI is classified as active, ensuring long-term availability and continued manufacturing support, whereas the STTH3006TPI is obsolete.
Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs and production.
Electrical Performance: The STTH1506TPI exhibits improved reverse recovery time (35 ns versus 45 ns) and lower reverse leakage current (20 µA versus 40 µA), resulting in reduced switching losses and improved thermal performance.
Mechanical Compatibility: Identical through-hole mounting and TOP-3 insulated packaging ensure direct physical replacement without PCB modification.

Selection of the STTH1506TPI is appropriate for new designs and production applications. For existing designs operating at currents exceeding 15 A, alternative high-current rectifier diodes with matching voltage and package specifications must be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the STTH1506TPI directly replace the STTH3006TPI in all applications?

A: Direct replacement is possible only in applications where the average rectified current does not exceed 15 A per diode. The STTH1506TPI has a lower current rating (15 A) compared to the STTH3006TPI (30 A). Circuit analysis must confirm that operating current remains within the 15 A specification.

Q: What is the primary reason for substitution?

A: The STTH3006TPI is classified as obsolete. The STTH1506TPI is an active product from the same manufacturer with identical voltage rating, configuration, and package type, making it the appropriate substitute for continued component availability.

Q: Are there any performance differences between the two parts?

A: The STTH1506TPI exhibits lower reverse recovery time (35 ns versus 45 ns) and lower reverse leakage current (20 µA versus 40 µA). These characteristics result in reduced switching losses and improved thermal efficiency. Forward voltage drop remains identical at 3.6 V across their respective current ratings.

Q: Is the package footprint identical?

A: Yes. Both the STTH3006TPI and STTH1506TPI use the TOP-3 insulated through-hole package. No PCB layout modifications are required for physical replacement.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, satisfying current regulatory standards for electronic component manufacturing and use.

Q: What should be considered before implementing this substitution?

A: Circuit design must operate at or below 15 A average rectified current per diode. Thermal analysis should account for the improved reverse leakage characteristics of the STTH1506TPI. Compliance documentation should be updated to reflect the active product status of the substitute part.

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