SMDB05/TR13 Equivalent & Substitute Parts

Part Overview

The SMDB05/TR13 is a Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, part of the TVSarray™ series. This surface-mount component provides electrostatic discharge (ESD) and transient overvoltage protection for general-purpose applications. The device features a 5V reverse standoff voltage, 11V maximum clamping voltage, and 5A peak pulse current capability in an 8-SOIC package.

The SMDB05/TR13 is classified as Active product status. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support component sourcing alternatives while maintaining electrical and mechanical compatibility.

Substiute Parts

SMDB05/TR13

Microchip TechnologyIn Stock: 1128SMDB05/TR13 Datasheet

Current PartRFQ

SMDB05/TR7

Microchip TechnologyIn Stock: 1028SMDB05/TR7 Datasheet

DirectRFQ

SMDA05.TBT

Semtech CorporationIn Stock: 1835SMDA05.TBT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMDB05/TR13 is determined by the following critical parameters:

Voltage Parameters: Reverse standoff voltage of 5V, minimum breakdown voltage of 6V, and maximum clamping voltage of 11V must be maintained or improved to ensure protection threshold compatibility.

Current Rating: Peak pulse current capability must equal or exceed 5A (8/20µs) to handle transient events without component degradation.

Package Compatibility: All substitutes must use the 8-SOIC surface-mount package with 0.154" (3.90mm) width to ensure PCB layout and footprint compatibility.

Electrical Characteristics: Capacitance at 1MHz (400pF) and power dissipation (300W peak pulse) define the transient response profile.

Operating Temperature: The -55°C to 150°C junction temperature range establishes the thermal operating envelope.

Substitute parts are grouped into two categories:

Category 1 - Direct Microchip Technology Equivalent: SMDB05/TR7 maintains identical electrical specifications and differs only in tape reel configuration (TR7 versus TR13 reel format).

Category 2 - Cross-Manufacturer Alternative: SMDA05.TBT (Semtech Corporation) provides enhanced peak pulse current (17A versus 5A) while maintaining voltage parameters, clamping characteristics, and package form factor. This part offers superior transient handling capability within the same physical and electrical protection envelope.

Parameter Comparison

Engineering Selection Recommendations

SMDB05/TR7 Selection: This Microchip Technology part is a direct electrical equivalent to the SMDB05/TR13, differing only in tape reel configuration. Selection of SMDB05/TR7 is appropriate when reel format TR7 is compatible with assembly equipment and supply chain requirements. Both parts maintain identical voltage protection thresholds, current ratings, and thermal operating ranges. RoHS compliance status is identical (non-compliant).

SMDA05.TBT Selection: The Semtech Corporation SMDA05.TBT provides enhanced peak pulse current capability (17A versus 5A) while maintaining all critical voltage parameters and clamping characteristics. This part is suitable for applications requiring higher transient current handling within the same protection voltage envelope. The SMDA05.TBT achieves ROHS3 compliance, providing environmental and regulatory advantage over the SMDB05/TR13. The maximum operating temperature is reduced to 125°C (versus 150°C for SMDB05/TR13), which must be evaluated against application thermal requirements.

Compliance Considerations: Applications subject to RoHS requirements should prioritize SMDA05.TBT. Applications with maximum junction temperature requirements exceeding 125°C should retain SMDB05/TR13 or SMDB05/TR7.

Frequently Asked Questions (FAQ)

Q: Can SMDB05/TR7 be used as a direct replacement for SMDB05/TR13?

A: Yes. SMDB05/TR7 is electrically and mechanically identical to SMDB05/TR13. The difference is limited to tape reel format (TR7 versus TR13). Substitution is valid provided assembly equipment accommodates the TR7 reel configuration.

Q: What is the primary advantage of SMDA05.TBT over SMDB05/TR13?

A: SMDA05.TBT provides three times the peak pulse current capability (17A versus 5A) while maintaining identical voltage protection thresholds and clamping characteristics. Additionally, SMDA05.TBT achieves ROHS3 compliance, whereas SMDB05/TR13 is RoHS non-compliant.

Q: Are there thermal operating range differences between substitutes?

A: Yes. SMDB05/TR13 and SMDB05/TR7 operate to 150°C junction temperature, while SMDA05.TBT operates to 125°C maximum. Applications requiring operation above 125°C must use SMDB05/TR13 or SMDB05/TR7.

Q: Do all substitute parts use the same 8-SOIC package?

A: Yes. SMDB05/TR13, SMDB05/TR7, and SMDA05.TBT all use the 8-SOIC package with 0.154" (3.90mm) width, ensuring PCB footprint compatibility.

Q: What is the significance of the 400pF capacitance specification?

A: Capacitance at 1MHz (400pF) is identical across all three parts and defines the transient response profile and high-frequency behavior of the TVS diode. This parameter is maintained across all substitutes.

Q: Is SMDA05.TBT suitable for all applications using SMDB05/TR13?

A: SMDA05.TBT is suitable for applications where the 125°C maximum junction temperature and ROHS3 compliance are acceptable. The enhanced current rating (17A) provides additional transient handling margin. Applications requiring operation above 125°C must use SMDB05/TR13 or SMDB05/TR7.

Q: What does the tape reel designation (TR13 versus TR7) indicate?

A: Tape reel designations indicate different reel formats used in automated assembly processes. TR13 and TR7 refer to specific reel configurations. Selection depends on assembly equipment compatibility and supply chain availability.