STTA2512P Equivalent & Substitute Parts

Part Overview

The STTA2512P is a diode array manufactured by STMicroelectronics, featuring two independent 1200 V, 25A rectifier elements in a SOD-93-2 through-hole package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement planning. The part operates within the TURBOSWITCH™ series and is RoHS3 compliant with unlimited moisture sensitivity rating.

Substiute Parts

STTA2512P

STMicroelectronicsIn Stock: 2391STTA2512P Datasheet

Current PartRFQ

RHRP15120

onsemiIn Stock: 95276RHRP15120 Datasheet

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RHRP30120

onsemiIn Stock: 37493RHRP30120 Datasheet

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RHRP8120

onsemiIn Stock: 45327RHRP8120 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STTA2512P is determined by the following electrical and mechanical criteria:

Voltage Rating: All substitute parts maintain the 1200 V DC reverse voltage specification, ensuring compatibility with the original design voltage envelope.

Current Rating: Substitute parts are grouped by average rectified current capacity. The STTA2512P delivers 25A per diode element. Substitute options include parts rated at 8A, 15A, and 30A, allowing selection based on circuit current requirements.

Reverse Recovery Time: All substitutes maintain fast recovery characteristics (≤ 500ns, > 200mA), preserving switching performance in rectification applications.

Mounting Type: All substitute parts are through-hole mounted, maintaining PCB assembly compatibility with the original design.

Package Configuration: Substitute parts utilize TO-220-2L packaging, differing from the original SOD-93-2 package. This represents a mechanical substitution requiring PCB layout modification.

Compliance: All substitute parts are RoHS3 compliant and REACH unaffected, matching the regulatory status of the original component.

Parameter Comparison

Engineering Selection Recommendations

RHRP15120 Selection: This part is recommended for applications requiring current capacity near the original 25A specification. The RHRP15120 operates at 15A average rectified current with 1200V voltage rating, matching the voltage envelope of the STTA2512P. This part maintains Last Time Buy status, providing extended procurement availability compared to fully obsolete alternatives. The faster reverse recovery time (75 ns versus 110 ns) improves switching efficiency. Package transition from SOD-93-2 to TO-220-2L requires PCB layout modification.

RHRP30120 Selection: This part provides current capacity exceeding the original specification at 30A, suitable for applications requiring design margin or current headroom. The 1200V voltage rating maintains compatibility with the original design voltage. Obsolete status matches the original part classification. The TO-220-2L package requires PCB redesign.

RHRP8120 Selection: This part is applicable only to circuits operating at reduced current levels (8A maximum). The 1200V voltage rating preserves voltage compatibility. Obsolete status and faster reverse recovery time (70 ns) are noted. This option is suitable only when circuit current requirements do not exceed 8A.

All substitute parts maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can the RHRP15120, RHRP30120, and RHRP8120 be used interchangeably with the STTA2512P?

A: These parts share the same 1200V voltage rating and fast recovery characteristics, but differ in current capacity and package type. Selection depends on circuit current requirements and PCB layout constraints. The RHRP15120 provides the closest current rating match at 15A. The RHRP30120 and RHRP8120 are suitable only when circuit current specifications align with their respective 30A and 8A ratings.

Q: What is the primary difference between the STTA2512P and the substitute parts?

A: The STTA2512P uses SOD-93-2 packaging with two independent diode elements, while all substitute parts use TO-220-2L packaging with single diode elements. This packaging difference requires PCB layout modification. Additionally, the substitute parts are manufactured by onsemi rather than STMicroelectronics.

Q: Does the package change from SOD-93-2 to TO-220-2L affect circuit performance?

A: The TO-220-2L package provides improved thermal dissipation compared to SOD-93-2, potentially reducing junction temperature in high-current applications. However, PCB layout must be redesigned to accommodate the larger TO-220-2L footprint and lead spacing.

Q: Are all substitute parts currently available?

A: The RHRP15120 maintains Last Time Buy status, indicating extended availability. The RHRP8120 and RHRP30120 are classified as obsolete, similar to the original STTA2512P. Inventory levels vary; current stock should be verified with component suppliers.

Q: What is the significance of reverse recovery time differences?

A: The substitute parts exhibit faster reverse recovery times (70-85 ns) compared to the STTA2512P (110 ns). This improvement reduces switching losses and improves efficiency in rectification circuits, particularly in high-frequency applications.

Q: How do forward voltage characteristics compare?

A: The STTA2512P specifies 2.1V forward voltage at 25A, while substitute parts specify 3.2V at their respective current ratings. Forward voltage varies with current; direct comparison requires evaluation at equivalent current levels.

Q: Are thermal characteristics compatible?

A: The STTA2512P specifies maximum junction temperature of 150°C, while substitute parts specify -65°C to 175°C operating range. The substitute parts provide higher maximum junction temperature capability, allowing operation in higher ambient temperature environments.