SMAJ48E3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ48E3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 48V reverse standoff voltage and provides clamping at 85.5V maximum, with a peak pulse current rating of 5.8A (10/1000µs). The device is housed in a DO-214AC (SMA) package and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative sourcing improves supply chain resilience, or when design requirements permit operation within the electrical and mechanical tolerances of equivalent devices. All substitute parts listed maintain the same 48V reverse standoff voltage and DO-214AC package form factor, ensuring direct compatibility in existing circuit designs.

Substiute Parts

SMAJ48E3/TR13

Microchip TechnologyIn Stock: 1045SMAJ48E3/TR13 Datasheet

Current PartRFQ

SMA6J48A-TR

STMicroelectronicsIn Stock: 30409SMA6J48A-TR Datasheet

SimilarRFQ

SMAJ48A

MDDIn Stock: 202171SMAJ48A Datasheet

SimilarRFQ

SMAJ48A

MDDIn Stock: 202171SMAJ48A Datasheet

SimilarRFQ

SMAJ48A-13-F

Diodes IncorporatedIn Stock: 4290SMAJ48A-13-F Datasheet

SimilarRFQ

SMAJ48A-TP

Micro Commercial CoIn Stock: 5986SMAJ48A-TP Datasheet

SimilarRFQ

SMAJ48A-TR

STMicroelectronicsIn Stock: 2557SMAJ48A-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMAJ48E3/TR13 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 48V (exact match required)
• Voltage - Breakdown (Min): 53.3V (exact match required)
• Package / Case: DO-214AC, SMA (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Type: Zener, Unidirectional (exact match required)
• Unidirectional Channels: 1 (exact match required)

Secondary Compatibility Parameters:

• Voltage - Clamping (Max) @ Ipp: Acceptable range 77.4V to 100V
• Current - Peak Pulse (10/1000µs): Acceptable range 5.2A to 40A
• Power - Peak Pulse: Acceptable range 400W to 600W
• Operating Temperature Range: Acceptable if minimum ≤ -55°C and maximum ≥ 150°C
• RoHS Status: ROHS3 Compliant (required)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (required)

All substitute parts listed maintain the core 48V standoff voltage and DO-214AC package specification, ensuring mechanical and electrical compatibility with the original design. Variations in clamping voltage, peak pulse current, and power dissipation are within acceptable tolerances for general-purpose TVS applications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, meeting the regulatory and environmental requirements of the original SMAJ48E3/TR13.

Selection by Application Requirements:

For applications requiring clamping voltage closest to original specification (85.5V): The SMA6J48A-TR (STMicroelectronics) provides 88.4V clamping voltage with enhanced peak pulse current capability (40A vs. 5.8A) and extended operating temperature range (-55 to 175°C). This part is suitable for designs where higher transient energy absorption is beneficial.

For applications requiring equivalent electrical performance with lower cost: The SMAJ48A (MDD), SMAJ48A-13-F (Diodes Incorporated), and SMAJ48A-TP (Micro Commercial Co) all provide 77.4V clamping voltage with 5.2A peak pulse current, closely matching the original 5.8A specification. These parts are suitable for cost-sensitive designs where the lower clamping voltage remains within circuit tolerance margins.

For applications requiring maximum peak pulse current capability: The SMAJ48A-TR (STMicroelectronics) provides 23A peak pulse current with 100V clamping voltage, suitable for high-energy transient environments where enhanced protection margin is required.

All substitute parts maintain the 48V reverse standoff voltage and DO-214AC package form factor, ensuring direct mechanical and electrical compatibility with existing PCB layouts and circuit designs.

Frequently Asked Questions (FAQ)

Q: Can SMAJ48A substitute for SMAJ48E3/TR13 in all applications?

A: The SMAJ48A (MDD) maintains the same 48V reverse standoff voltage, 53.3V breakdown voltage, and DO-214AC package as the original part. The clamping voltage is 77.4V versus 85.5V, and peak pulse current is 5.2A versus 5.8A. Substitution is valid when circuit design tolerates these parameter variations. Verify that the lower clamping voltage does not compromise overvoltage protection requirements.

Q: What is the difference between SMAJ48A-TP and SMAJ48A-13-F?

A: Both parts are manufactured by different suppliers (Micro Commercial Co and Diodes Incorporated, respectively) and share identical electrical specifications: 48V standoff, 77.4V clamping, and 5.2A peak pulse current. The primary difference is operating temperature range: SMAJ48A-TP operates -55 to 175°C, while SMAJ48A-13-F operates -55 to 150°C. Selection depends on thermal environment requirements.

Q: Is the SMA6J48A-TR compatible with the original SMAJ48E3/TR13?

A: The SMA6J48A-TR maintains the 48V reverse standoff voltage and DO-214AC package, ensuring mechanical compatibility. Electrical differences include higher clamping voltage (88.4V vs. 85.5V) and significantly higher peak pulse current (40A vs. 5.8A). This part is suitable for applications requiring enhanced transient protection but may not be necessary for designs validated with the original 5.8A specification.

Q: Why do some substitute parts have different peak pulse current ratings?

A: Peak pulse current ratings reflect the maximum transient energy each device can safely dissipate. The SMAJ48E3/TR13 is rated for 5.8A (10/1000µs), while alternatives range from 5.2A to 40A depending on manufacturer design. Higher ratings provide greater protection margin but are not required if circuit transient energy remains below the original specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the regulatory and environmental compliance of the original SMAJ48E3/TR13.

Q: Can SMAJ48A-TR (STMicroelectronics) with 100V clamping replace SMAJ48E3/TR13?

A: The SMAJ48A-TR maintains the 48V reverse standoff voltage and DO-214AC package. The 100V clamping voltage is higher than the original 85.5V specification, and peak pulse current is 23A versus 5.8A. This part is suitable for applications where higher clamping voltage and greater transient energy absorption are acceptable or beneficial. Verify that the higher clamping voltage does not interfere with downstream circuit operation.

Q: What packaging options are available for substitute parts?

A: All substitute parts use the DO-214AC (SMA) surface-mount package, ensuring direct compatibility with existing PCB layouts. Some parts are supplied in Tape & Reel (TR) or Cut Tape (CT) packaging formats, which are handling and assembly options that do not affect electrical or mechanical compatibility.