SMAJ48AE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ48AE3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This surface-mount component operates with a 48V reverse standoff voltage and provides clamping at 77.4V maximum, with a peak pulse current rating of 6.5A. The device is packaged in DO-214AC (SMA) format and supplied on tape and reel.

The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified based on matching electrical characteristics within the 48V reverse standoff voltage class, compatible package formats, and equivalent operational temperature ranges suitable for general-purpose transient suppression circuits.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	48	V
Voltage - Breakdown (Min)	53.3	V
Voltage - Clamping (Max) @ Ipp	77.4	V
Current - Peak Pulse (10/1000µs)	6.5	A
Power - Peak Pulse	500	W
Operating Temperature Range	-65 to 150	°C
Package / Case	DO-214AC, SMA	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the SMAJ48AE3/TR13 are classified based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 48V
Voltage - Breakdown (Min): 53.3V
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Unidirectional Channels: 1
Type: Zener
RoHS Status: ROHS3 Compliant

Acceptable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: 77.4V to 100V
Current - Peak Pulse (10/1000µs): 5.2A to 40A
Power - Peak Pulse: 400W to 600W
Operating Temperature Range: -55°C to 175°C

Parts meeting these criteria maintain functional equivalence for general-purpose transient voltage suppression while accommodating manufacturer-specific design variations and performance enhancements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Package	RoHS Status
SMAJ48AE3/TR13	Microchip Technology	48V	53.3V	77.4V	6.5A (10/1000µs)	500W	-65 to 150°C	DO-214AC, SMA	ROHS3 Compliant
SMA6J48A-TR	STMicroelectronics	48V	53.3V	88.4V	40A (8/20µs)	600W	-55 to 175°C	DO-214AC, SMA	ROHS3 Compliant
SMAJ48A	MDD	48V	53.3V	77.4V	5.2A (10/1000µs)	400W	-50 to 150°C	DO-214AC, SMA	ROHS3 Compliant
SMAJ48A-13-F	Diodes Incorporated	48V	53.3V	77.4V	5.2A (10/1000µs)	400W	-55 to 150°C	DO-214AC, SMA	ROHS3 Compliant
SMAJ48A-TP	Micro Commercial Co	48V	53.3V	77.4V	5.2A (10/1000µs)	400W	-55 to 175°C	DO-214AC, SMA	ROHS3 Compliant
SMAJ48A-TR	STMicroelectronics	48V	53.3V	100V	23A (8/20µs)	400W	-55 to 150°C	DO-214AC, SMA	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts maintain active product status and full RoHS3 compliance, meeting regulatory requirements equivalent to the SMAJ48AE3/TR13. Selection among substitutes depends on application-specific requirements within the following categories:

Standard Replacement (Matched Performance): SMAJ48A (MDD), SMAJ48A-13-F (Diodes Incorporated), and SMAJ48A-TP (Micro Commercial Co) provide electrical characteristics closely aligned with the original part, featuring identical 77.4V clamping voltage and comparable current ratings of 5.2A. These parts are suitable for direct substitution in circuits designed for the SMAJ48AE3/TR13 specifications.

Enhanced Performance Options: SMA6J48A-TR (STMicroelectronics) and SMAJ48A-TR (STMicroelectronics) offer increased current handling capacity (40A and 23A respectively) and higher clamping voltages (88.4V and 100V). These parts accommodate applications requiring superior transient suppression capability while maintaining the 48V reverse standoff voltage class.

Temperature Range Considerations: SMAJ48A-TP (Micro Commercial Co) extends the upper operating temperature to 175°C, compared to the original part's 150°C maximum. SMA6J48A-TR and SMAJ48A-TR also support -55°C minimum operating temperature, providing broader thermal operating windows for demanding environments.

All substitute parts are supplied in DO-214AC (SMA) surface-mount packaging, ensuring mechanical and thermal compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can SMAJ48A-TP be used as a direct replacement for SMAJ48AE3/TR13?

A: Yes. SMAJ48A-TP maintains identical voltage specifications (48V reverse standoff, 53.3V breakdown, 77.4V clamping) and current rating (5.2A peak pulse). Both parts use DO-214AC (SMA) packaging and are RoHS3 compliant. The primary difference is extended upper operating temperature (175°C versus 150°C) and manufacturer (Micro Commercial Co versus Microchip Technology).

Q: What is the difference between the STMicroelectronics SMA6J48A-TR and SMAJ48A-TR options?

A: Both STMicroelectronics parts maintain the 48V reverse standoff voltage but differ in clamping voltage and current capacity. SMA6J48A-TR provides 88.4V clamping with 40A peak pulse current (8/20µs pulse), while SMAJ48A-TR provides 100V clamping with 23A peak pulse current (8/20µs pulse). Selection depends on circuit transient suppression requirements and available power dissipation budget.

Q: Are all substitute parts available in tape and reel packaging?

A: SMA6J48A-TR, SMAJ48A-13-F, SMAJ48A-TP, and SMAJ48A-TR are supplied on tape and reel. SMAJ48A (MDD) packaging format is not specified in available data. Verify packaging availability with supplier documentation when tape and reel format is required for automated assembly processes.

Q: Do substitute parts meet the same compliance standards as the original SMAJ48AE3/TR13?

A: Yes. All identified substitute parts are RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the original part's regulatory status. REACH compliance information is available for all parts except SMAJ48A (MDD).

Q: What is the significance of the different peak pulse current measurement standards (10/1000µs versus 8/20µs)?

A: Peak pulse current ratings reflect different transient waveform standards. The 10/1000µs standard applies to the original SMAJ48AE3/TR13 and most substitute parts. STMicroelectronics parts (SMA6J48A-TR and SMAJ48A-TR) use the 8/20µs standard, which represents a different transient profile. Both standards are valid for general-purpose applications; selection depends on the specific transient environment of the circuit.

Q: Can SMAJ48A (MDD) be used if packaging format is not critical?

A: Yes. SMAJ48A (MDD) provides equivalent electrical performance with 48V reverse standoff, 53.3V breakdown, 77.4V clamping, and 5.2A peak pulse current. The part is RoHS3 compliant and suitable for general-purpose applications. Verify packaging and supplier availability for your specific procurement requirements.

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