SMAJ58CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ58CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a reverse standoff voltage of 58V and provides clamping at 103V maximum, with peak pulse current handling of 4.9A. The component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges while maintaining compatibility with the DO-214AC (SMA) package format and surface-mount assembly requirements.

Substiute Parts

SMAJ58CE3/TR13

Microchip TechnologyIn Stock: 829SMAJ58CE3/TR13 Datasheet

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SM4T68CAY

STMicroelectronicsIn Stock: 4393SM4T68CAY Datasheet

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SMAJ58CA

MDDIn Stock: 105110SMAJ58CA Datasheet

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SMAJ58CA

MDDIn Stock: 105110SMAJ58CA Datasheet

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SMAJ58CA-13-F

Diodes IncorporatedIn Stock: 30185SMAJ58CA-13-F Datasheet

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SMAJ58CA-TP

Micro Commercial CoIn Stock: 10343SMAJ58CA-TP Datasheet

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SMAJ58CA-TR

STMicroelectronicsIn Stock: 3064SMAJ58CA-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ58CE3/TR13 are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

• Reverse standoff voltage: 58V (fixed requirement)
• Breakdown voltage minimum: 64.4V (fixed requirement)
• Package format: DO-214AC / SMA (mandatory for mechanical compatibility)
• Bidirectional channels: 1 (fixed requirement)
• Type: Zener (fixed requirement)
• RoHS3 compliance (regulatory requirement)

Secondary Parameters Allowing Variation:

• Voltage clamping maximum: 93.6V to 121V (acceptable range for general-purpose protection)
• Peak pulse current: 3.4A to 19A (acceptable range depending on application requirements)
• Power dissipation: 400W to 500W (acceptable range)
• Operating temperature: -55°C to 175°C (acceptable range, must include minimum -55°C)

Substitute parts are grouped into two categories based on clamping voltage performance:

Group A (Lower Clamping Voltage): SMAJ58CA, SMAJ58CA-13-F, SMAJ58CA-TP

• Clamping voltage: 93.6V
• Peak pulse current: 4.3A
• Power dissipation: 400W

Group B (Higher Clamping Voltage): SM4T68CAY, SMAJ58CA-TR

• Clamping voltage: 121V
• Peak pulse current: 19A (8/20µs)
• Power dissipation: 400W

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Lowest Risk):

SMAJ58CA-TP (Micro Commercial Co) provides the closest electrical match with 93.6V clamping and 4.3A peak pulse current. This part maintains compatibility with the DO-214AC package and extends the upper operating temperature to 175°C, offering enhanced thermal performance. RoHS3 compliance and unlimited moisture sensitivity rating align with the main part specifications.

For Higher Current Applications:

SM4T68CAY (STMicroelectronics) and SMAJ58CA-TR (STMicroelectronics) both deliver 19A peak pulse current with 121V clamping voltage. These parts are suitable when higher transient energy absorption is required. Both carry AEC-Q101 automotive qualification (SM4T68CAY) and TRANSIL™ series designation, indicating enhanced reliability. Operating temperature range is -55°C to 150°C.

For Cost-Optimized Selection:

SMAJ58CA (MDD) offers the highest inventory availability (105,100 pieces) with 93.6V clamping and 4.3A peak pulse current. This part meets all RoHS3 and regulatory requirements but operates within -50°C to 150°C temperature range, which is acceptable for most general-purpose applications.

For Extended Temperature Range:

SMAJ58CA-TP (Micro Commercial Co) supports -55°C to 175°C operating temperature, providing the widest thermal envelope among all substitutes. This selection is appropriate for applications requiring enhanced low-temperature performance or high-temperature environments.

All substitute parts maintain the critical 58V reverse standoff voltage and 64.4V minimum breakdown voltage required for circuit protection integrity.

Frequently Asked Questions (FAQ)

Q: Can SMAJ58CA-TP be used as a direct replacement for SMAJ58CE3/TR13?

A: Yes. SMAJ58CA-TP maintains identical reverse standoff voltage (58V), breakdown voltage (64.4V), and package format (DO-214AC/SMA). The clamping voltage is 93.6V versus 103V on the main part, and peak pulse current is 4.3A versus 4.9A. These differences are within acceptable substitution parameters for general-purpose transient voltage suppression. Both parts are RoHS3 compliant with unlimited moisture sensitivity.

Q: What is the difference between Group A and Group B substitute parts?

A: Group A parts (SMAJ58CA, SMAJ58CA-13-F, SMAJ58CA-TP) feature 93.6V clamping voltage and 4.3A peak pulse current with 400W power dissipation. Group B parts (SM4T68CAY, SMAJ58CA-TR) feature 121V clamping voltage and 19A peak pulse current with 400W power dissipation. Group B parts handle higher transient energy but produce higher clamping voltages. Selection depends on circuit protection requirements and transient energy levels.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts use DO-214AC (SMA) surface-mount package format, ensuring mechanical compatibility with the original SMAJ58CE3/TR13 footprint. Packaging variations (Tape & Reel, Cut Tape, Digi-Reel) affect supply chain logistics but do not impact electrical or mechanical compatibility.

Q: What is the minimum operating temperature requirement for substitution?

A: The main part SMAJ58CE3/TR13 operates from -65°C to 150°C. Substitute parts operate from -55°C to -50°C minimum. For applications requiring operation below -55°C, the main part is the only option. For applications within -55°C to 150°C range, all substitute parts are acceptable.

Q: Does clamping voltage variation affect circuit protection?

A: Clamping voltage determines the maximum voltage presented to protected circuitry during transient events. The main part clamps at 103V maximum, while Group A substitutes clamp at 93.6V and Group B substitutes clamp at 121V. Lower clamping voltage (Group A) provides tighter protection but requires verification that protected components tolerate this voltage. Higher clamping voltage (Group B) provides more margin but allows higher transient voltages to reach protected circuitry. Circuit design specifications determine acceptable clamping voltage range.

Q: Which substitute part has the highest inventory availability?

A: SMAJ58CA (MDD) has 105,100 pieces in stock, significantly higher than other substitutes. SMAJ58CA-13-F (Diodes Incorporated) has 30,100 pieces, and SMAJ58CA-TP (Micro Commercial Co) has 10,300 pieces. SM4T68CAY and SMAJ58CA-TR have 4,306 and 2,984 pieces respectively.

Q: Are automotive-grade qualifications available among substitute parts?

A: SM4T68CAY (STMicroelectronics) carries AEC-Q101 automotive qualification and TRANSIL™ series designation, indicating automotive-grade reliability. This part is suitable for automotive and industrial applications requiring enhanced qualification standards. Other substitutes are general-purpose grade without automotive qualification.

Q: What is the significance of the TRANSIL™ series designation?

A: TRANSIL™ is a STMicroelectronics product line designation for transient voltage suppressors. Parts carrying this designation (SM4T68CAY, SMAJ58CA-TR) indicate manufacturer-specific quality and performance standards. This designation does not affect electrical substitution compatibility but may indicate enhanced reliability characteristics for specific applications.