SMB15F13A Equivalent & Substitute Parts

Part Overview

The SMB15F13A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by STMicroelectronics, designed for general-purpose overvoltage protection applications. This component features a 13V reverse standoff voltage, 27.2V maximum clamping voltage, and 368A peak pulse current capability in an SMBflat surface mount package.

The SMB15F13A is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this TVS diode.

Substiute Parts

SMB15F13A

STMicroelectronicsIn Stock: 965SMB15F13A Datasheet

Current PartRFQ

SM15T15A

STMicroelectronicsIn Stock: 25316SM15T15A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMB15F13A are identified based on electrical and mechanical compatibility within the TVS diode category. The primary substitution criteria are:

Electrical Parameters (Critical for Substitution):

• Voltage - Clamping (Max) @ Ipp: 27.2V (must match exactly)
• Current - Peak Pulse (10/1000µs): 368A (8/20µs) (must match exactly)
• Power - Peak Pulse: 1500W (1.5kW) (must match exactly)
• Voltage - Reverse Standoff (Typ): tolerance range acceptable
• Voltage - Breakdown (Min): tolerance range acceptable

Mechanical Parameters (Required for Compatibility):

• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

Compliance & Status:

• REACH Status: REACH Unaffected
• ECCN: EAR99
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The SM15T15A meets all critical electrical parameters and compliance requirements, with the primary difference being package configuration (SMC versus SMBflat) and product status (Active versus Obsolete).

Parameter Comparison

Engineering Selection Recommendations

SM15T15A as Primary Substitute:

The SM15T15A is the qualified substitute for the obsolete SMB15F13A based on the following engineering criteria:

1. Electrical Equivalence: All critical electrical parameters match exactly: 27.2V clamping voltage, 368A peak pulse current, and 1500W peak pulse power. Reverse standoff and breakdown voltages are within acceptable tolerance ranges (13V versus 12.8V standoff; 14.4V versus 14.3V breakdown).

2. Product Status: The SM15T15A is an active product with full manufacturing support and availability (25,300 pieces in stock), addressing the supply discontinuation of the obsolete SMB15F13A (922 pieces remaining).

3. Compliance Alignment: Both parts maintain identical REACH Status (REACH Unaffected), ECCN classification (EAR99), and Moisture Sensitivity Level (MSL 1 - Unlimited), ensuring regulatory and environmental compliance continuity.

4. Package Consideration: The SM15T15A uses DO-214AB SMC packaging versus the SMBflat (DO-221AA) of the original part. PCB layout and footprint modifications are required for implementation.

5. Temperature Operating Range: The SM15T15A operates across -55°C to 150°C, compared to the SMB15F13A range of -55°C to 175°C. Applications requiring operation above 150°C require thermal analysis validation.

Frequently Asked Questions (FAQ)

Q: Can the SM15T15A directly replace the SMB15F13A without PCB modifications?

A: No. While electrically equivalent, the SM15T15A uses SMC (DO-214AB) packaging versus the SMBflat (DO-221AA) package of the SMB15F13A. PCB footprint and land pattern modifications are required.

Q: Are the voltage parameters of the SM15T15A acceptable for SMB15F13A applications?

A: Yes. The SM15T15A reverse standoff voltage (12.8V) and breakdown voltage (14.3V) are within acceptable tolerance ranges relative to the SMB15F13A specifications (13V and 14.4V respectively). Both parts deliver identical 27.2V clamping voltage performance.

Q: What is the significance of the operating temperature range difference?

A: The SM15T15A operates to 150°C maximum junction temperature, while the SMB15F13A operates to 175°C. Applications operating above 150°C require thermal design review to confirm the substitute part remains within safe operating limits.

Q: Why is the SM15T15A classified as Active while the SMB15F13A is Obsolete?

A: The SMB15F13A has been discontinued by STMicroelectronics. The SM15T15A represents the current active product line offering equivalent electrical performance with ongoing manufacturing support and supply availability.

Q: Are compliance certifications identical between the two parts?

A: Yes. Both the SMB15F13A and SM15T15A share identical REACH Status (REACH Unaffected), ECCN classification (EAR99), and Moisture Sensitivity Level (MSL 1 - Unlimited).

Q: What packaging formats are available for the SM15T15A?

A: The SM15T15A is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both manual and automated assembly processes.