SMDA24/TR13 Equivalent & Substitute Parts

Part Overview

The SMDA24/TR13 is a Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This unidirectional, 4-channel Zener TVS diode operates with a 24V reverse standoff voltage and provides 43V maximum clamping voltage at peak pulse current. The device is supplied in Tape & Reel (TR) packaging format in an 8-SOIC surface mount package.

The SMDA24/TR13 maintains Active product status and is widely used in circuit protection designs requiring fast transient suppression. Alternative equivalent and substitute parts are identified to support procurement flexibility, packaging format preferences, and supply chain continuity.

Substiute Parts

SMDA24/TR13

Microchip TechnologyIn Stock: 1235SMDA24/TR13 Datasheet

Current PartRFQ

SMDB24/TR7

Microchip TechnologyIn Stock: 1354SMDB24/TR7 Datasheet

DirectRFQ

SMDA24.TBT

Semtech CorporationIn Stock: 2168SMDA24.TBT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMDA24/TR13 are identified based on electrical and mechanical parameter compatibility within the TVS diode category. The substitution logic is structured as follows:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 24V
• Voltage - Breakdown (Min): 26.7V minimum
• Current - Peak Pulse (8/20µs): 5A
• Package / Case: 8-SOIC surface mount
• Unidirectional Channels: 4
• Mounting Type: Surface Mount

Acceptable Parameter Variations:

• Voltage - Clamping (Max) @ Ipp: 43V to 55V (higher clamping voltage acceptable for overvoltage protection applications)
• Capacitance @ 1MHz: 60pF to 90pF (minor variation acceptable)
• Operating Temperature Range: -55°C minimum to 125°C or higher (extended upper range acceptable)
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) formats are interchangeable for component procurement

Substitute parts maintain identical electrical performance for the core protection function while offering packaging flexibility and supply availability options.

Parameter Comparison

Engineering Selection Recommendations

SMDB24/TR7 (Microchip Technology) - Direct Equivalent

The SMDB24/TR7 is a direct electrical equivalent to the SMDA24/TR13, maintaining identical voltage ratings (24V standoff, 26.7V breakdown, 43V clamping), peak pulse current (5A), and power dissipation (300W). Both devices are manufactured by Microchip Technology and share the same 8-SOIC package footprint. The primary difference is packaging format: SMDB24/TR7 is supplied in Cut Tape (CT) format rather than Tape & Reel (TR). This substitute is suitable for applications where Cut Tape packaging is acceptable or preferred. Both parts maintain identical RoHS non-compliant status and Active product status.

SMDA24.TBT (Semtech Corporation) - Functional Equivalent with Parameter Variation

The SMDA24.TBT is a functional equivalent manufactured by Semtech Corporation, maintaining the same 24V reverse standoff voltage, 26.7V breakdown voltage, and 5A peak pulse current as the SMDA24/TR13. The device is supplied in Tape & Reel (TR) packaging matching the original part format. Key differences include:

• Voltage - Clamping (Max) @ Ipp: 55V (versus 43V on SMDA24/TR13). The higher clamping voltage provides additional overvoltage margin and is acceptable for general-purpose protection applications.
• Capacitance @ 1MHz: 60pF (versus 90pF on SMDA24/TR13). The lower capacitance may be beneficial in high-frequency signal integrity applications.
• Operating Temperature Range: -55°C to 125°C (versus -55°C to 150°C on SMDA24/TR13). The reduced upper temperature limit should be verified against application requirements.
• RoHS Status: ROHS3 Compliant (versus RoHS non-compliant on SMDA24/TR13). This substitute meets current RoHS3 environmental compliance requirements.

The SMDA24.TBT is suitable for applications requiring RoHS3 compliance or where the higher clamping voltage and lower capacitance characteristics are advantageous.

Frequently Asked Questions (FAQ)

Q: Can SMDB24/TR7 be used as a direct replacement for SMDA24/TR13?

A: Yes. The SMDB24/TR7 is electrically identical to the SMDA24/TR13, with matching voltage ratings (24V standoff, 26.7V breakdown, 43V clamping), peak pulse current (5A), and power dissipation (300W). Both are 8-SOIC surface mount packages. The only difference is packaging format: SMDB24/TR7 is supplied in Cut Tape (CT) format instead of Tape & Reel (TR). Component selection depends on your assembly process requirements.

Q: What are the key differences between SMDA24/TR13 and SMDA24.TBT?

A: Both parts maintain the same 24V reverse standoff voltage, 26.7V breakdown voltage, and 5A peak pulse current. The SMDA24.TBT differs in three areas: (1) Voltage - Clamping (Max) @ Ipp is 55V instead of 43V, providing higher overvoltage margin; (2) Capacitance @ 1MHz is 60pF instead of 90pF, which may improve high-frequency performance; (3) Operating temperature range is -55°C to 125°C instead of -55°C to 150°C. Additionally, SMDA24.TBT is ROHS3 compliant while SMDA24/TR13 is not.

Q: Is the higher clamping voltage (55V) of SMDA24.TBT a problem for my circuit?

A: No. A higher clamping voltage is acceptable in TVS diode substitution. The SMDA24.TBT will clamp transients at 55V maximum instead of 43V, providing additional safety margin. This is suitable for general-purpose protection applications. Verify that your circuit design can tolerate the 55V clamping level.

Q: Can I use SMDA24.TBT if my application requires RoHS compliance?

A: Yes. The SMDA24.TBT is ROHS3 compliant, making it suitable for applications with RoHS environmental requirements. The SMDA24/TR13 and SMDB24/TR7 are both RoHS non-compliant and should not be used in RoHS-restricted applications.

Q: Does the lower capacitance (60pF) of SMDA24.TBT affect circuit performance?

A: The lower capacitance of SMDA24.TBT (60pF versus 90pF) may improve performance in high-frequency signal integrity applications by reducing parasitic capacitive loading. For general-purpose overvoltage protection, this difference is not significant. Verify capacitance requirements against your specific circuit design.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, suitable for high-volume automated assembly. Cut Tape (CT) packaging supplies components on tape cut into smaller lengths, suitable for lower-volume or manual assembly processes. Both formats contain identical components; selection depends on your assembly equipment and volume requirements.

Q: Are all three parts pin-compatible?

A: Yes. SMDA24/TR13, SMDB24/TR7, and SMDA24.TBT all use the 8-SOIC (0.154", 3.90mm Width) surface mount package with identical pinouts and footprints. They are mechanically and electrically interchangeable at the PCB level.

Q: What is the operating temperature range difference between SMDA24/TR13 and SMDA24.TBT?

A: SMDA24/TR13 operates from -55°C to 150°C (TJ), while SMDA24.TBT operates from -55°C to 125°C (TJ). If your application requires operation above 125°C, use SMDA24/TR13 or SMDB24/TR7. For applications operating at or below 125°C, SMDA24.TBT is suitable.