SMDA24C/TR13 Equivalent & Substitute Parts

Part Overview

The SMDA24C/TR13 is a bidirectional 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 in general-purpose applications. The device features a 24V reverse standoff voltage with a 43V maximum clamping voltage and 5A peak pulse current capability in an 8-SOIC package.

The SMDA24C/TR13 is classified as an active product with current inventory availability. Equivalent and substitute parts are identified based on matching electrical performance parameters, mechanical compatibility, and packaging specifications. Alternative part numbers are necessary when the primary part becomes unavailable or when specific packaging or compliance requirements necessitate component substitution.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	24	V
Voltage - Breakdown (Min)	26.7	V
Voltage - Clamping (Max) @ Ipp	43	V
Current - Peak Pulse (8/20µs)	5	A
Power - Peak Pulse	300	W
Bidirectional Channels	4	Channels
Capacitance @ 1MHz	45	pF
Operating Temperature Range	-55 to 150	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the SMDA24C/TR13 is determined by the following critical parameters:

Electrical Equivalence Criteria:

Voltage - Reverse Standoff (Typ): 24V
Voltage - Breakdown (Min): 26.7V
Voltage - Clamping (Max) @ Ipp: 43V (primary criterion)
Current - Peak Pulse (8/20µs): 5A
Power - Peak Pulse: 300W
Bidirectional Channels: 4 channels

Mechanical Compatibility Criteria:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Supplier Device Package: 8-SO

Packaging Format Variations: Substitute parts are available in different tape and reel configurations (TR13, TR7, CT) and alternative packaging formats (TBT, Digi-Reel®). These variations do not affect electrical performance but address different procurement and assembly requirements.

Deviation Tolerance: Parts with identical electrical parameters and 8-SOIC package form factors are classified as direct substitutes. Parts with variations in clamping voltage, channel count, or operating temperature range are classified as similar substitutes and require engineering evaluation for specific applications.

Parameter Comparison

Parameter	SMDA24C/TR13 (Main)	SMDA24C/TR7	SMDB24C/TR7	SMDA24C-7.TBT	SMDA24C.TBT
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology	Semtech Corporation	Semtech Corporation
Voltage - Reverse Standoff (Typ)	24V	24V	24V	24V (Max)	24V (Max)
Voltage - Breakdown (Min)	26.7V	26.7V	26.7V	26.7V	26.7V
Voltage - Clamping (Max) @ Ipp	43V	43V	43V	43V	55V
Current - Peak Pulse (8/20µs)	5A	5A	5A	5A	5A
Power - Peak Pulse	300W	300W	300W	300W	300W
Bidirectional Channels	4	4	4	7	4
Capacitance @ 1MHz	45pF	45pF	45pF	50pF	50pF
Operating Temperature Range	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 125°C	-55 to 125°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Packaging Format	Tape & Reel (TR13)	Tape & Reel (TR7)	Cut Tape (CT)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
RoHS Status	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Substitutes (Microchip Technology):

The SMDA24C/TR7 and SMDB24C/TR7 are direct electrical equivalents to the SMDA24C/TR13. Both parts maintain identical voltage specifications (24V reverse standoff, 43V clamping), current ratings (5A peak pulse), and thermal performance (-55°C to 150°C operating range). The primary difference is packaging format: SMDA24C/TR7 uses Tape & Reel (TR7) configuration, while SMDB24C/TR7 uses Cut Tape (CT) configuration. Both parts retain the RoHS non-compliant status of the original component. Selection between these options depends on procurement and assembly line requirements.

Similar Substitutes (Semtech Corporation):

The SMDA24C-7.TBT and SMDA24C.TBT are manufactured by Semtech Corporation and introduce parameter variations that require consideration:

SMDA24C-7.TBT: Maintains 43V clamping voltage and 5A peak pulse current but features 7 bidirectional channels (versus 4 in the main part). Operating temperature range is reduced to -55°C to 125°C. RoHS Compliant status differs from the main part. Capacitance increases to 50pF @ 1MHz.
SMDA24C.TBT: Increases clamping voltage to 55V (versus 43V in the main part), representing a 28% increase in transient suppression capability. Maintains 5A peak pulse current and 4 bidirectional channels. Operating temperature range is -55°C to 125°C. RoHS3 Compliant status. Capacitance is 50pF @ 1MHz.

Compliance Considerations:

The SMDA24C/TR13 is RoHS non-compliant. If RoHS compliance is required for new designs or procurement, the Semtech alternatives (SMDA24C-7.TBT and SMDA24C.TBT) provide RoHS Compliant or ROHS3 Compliant options. However, this substitution introduces electrical parameter changes that must be validated against circuit requirements.

Temperature Performance:

The Microchip alternatives (SMDA24C/TR7 and SMDB24C/TR7) maintain the full -55°C to 150°C operating range of the main part. Semtech alternatives are limited to -55°C to 125°C. Applications requiring operation above 125°C must use Microchip parts.

Frequently Asked Questions (FAQ)

Q: Can SMDA24C/TR7 be used as a direct replacement for SMDA24C/TR13?

A: Yes. The SMDA24C/TR7 is electrically and mechanically identical to the SMDA24C/TR13. The difference is the tape and reel configuration (TR7 versus TR13), which affects packaging and procurement but not component performance. Both parts are manufactured by Microchip Technology and share identical electrical specifications.

Q: What is the difference between SMDA24C/TR7 and SMDB24C/TR7?

A: Both parts are electrically identical with matching voltage, current, and thermal specifications. The difference is the packaging format: SMDA24C/TR7 is supplied in Tape & Reel (TR7) configuration, while SMDB24C/TR7 is supplied in Cut Tape (CT) configuration. Selection depends on assembly line equipment and procurement requirements.

Q: Can Semtech SMDA24C-7.TBT replace Microchip SMDA24C/TR13?

A: Electrical substitution is possible with engineering evaluation. The SMDA24C-7.TBT maintains the 24V reverse standoff and 43V clamping voltage but introduces three differences: (1) 7 bidirectional channels instead of 4, (2) reduced operating temperature range (-55°C to 125°C versus -55°C to 150°C), and (3) RoHS Compliant status. Applications operating above 125°C or requiring exactly 4 channels must use Microchip parts.

Q: What is the impact of the 55V clamping voltage in SMDA24C.TBT?

A: The SMDA24C.TBT provides higher transient suppression capability with a 55V maximum clamping voltage compared to 43V in the main part. This 28% increase in clamping voltage results in lower residual voltage during transient events. This part is suitable for applications requiring enhanced overvoltage protection but must be evaluated for circuit compatibility, as lower clamping voltage may be required in some designs.

Q: Are all substitute parts available in the same 8-SOIC package?

A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package form factor, ensuring mechanical compatibility with the original SMDA24C/TR13. PCB footprints and assembly processes remain unchanged.

Q: What is the difference between Tape & Reel (TR13) and Tape & Reel (TR7) packaging?

A: TR13 and TR7 refer to different tape and reel configurations used for automated assembly. TR13 uses a 13-inch reel, while TR7 uses a 7-inch reel. Both formats contain the same component; the difference is the physical reel size and component quantity per reel. Selection depends on production volume and assembly equipment compatibility.

Q: Can SMDA24C.TBT be used if the application requires the exact 43V clamping voltage?

A: No. The SMDA24C.TBT has a 55V clamping voltage, which exceeds the 43V specification of the main part. This higher clamping voltage may not be suitable for circuits designed for 43V transient suppression. Use SMDA24C/TR7 or SMDB24C/TR7 for exact electrical equivalence.

Q: What is the significance of RoHS compliance in substitute selection?

A: RoHS compliance indicates the absence of restricted hazardous substances. The main part (SMDA24C/TR13) is RoHS non-compliant. Semtech alternatives (SMDA24C-7.TBT and SMDA24C.TBT) are RoHS Compliant or ROHS3 Compliant. If regulatory or procurement requirements mandate RoHS compliance, Semtech parts must be selected, with electrical parameter variations evaluated for circuit compatibility.

Q: Are all substitute parts manufactured by the same company?

A: No. SMDA24C/TR7 and SMDB24C/TR7 are manufactured by Microchip Technology. SMDA24C-7.TBT and SMDA24C.TBT are manufactured by Semtech Corporation. Both manufacturers produce TVS diodes meeting the same electrical specifications, but design and process differences may result in minor parameter variations within specified tolerances.

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