SMAJ13A-TP Equivalent & Substitute Parts

Part Overview

The SMAJ13A-TP is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose transient protection in surface-mount applications. This component features a 13V reverse standoff voltage with a 21.5V maximum clamping voltage and 18.6A peak pulse current capability in a DO-214AC (SMA) package. The part is Active status and ROHS3 compliant with unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified when electrical parameters and mechanical compatibility align within acceptable tolerances for the application. Substitutes are categorized as Direct equivalents (identical electrical specifications) or Similar alternatives (compatible but with parameter variations).

Substiute Parts

SMAJ13A-TP

Micro Commercial CoIn Stock: 5309SMAJ13A-TP Datasheet

Current PartRFQ

SMAJ13A

MDDIn Stock: 40231SMAJ13A Datasheet

DirectRFQ

SMAJ13A

MDDIn Stock: 40231SMAJ13A Datasheet

DirectRFQ

SMAJ13A-13-F

Diodes IncorporatedIn Stock: 19975SMAJ13A-13-F Datasheet

DirectRFQ

SMAJ13A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 4303SMAJ13A-E3/61 Datasheet

DirectRFQ

SZ1SMA13AT3G

Littelfuse Inc.In Stock: 20292SZ1SMA13AT3G Datasheet

DirectRFQ

SM4T15AY

STMicroelectronicsIn Stock: 6372SM4T15AY Datasheet

SimilarRFQ

SMA6F13A-M3/6A

Vishay General Semiconductor - Diodes DivisionIn Stock: 7337SMA6F13A-M3/6A Datasheet

SimilarRFQ

SMA6J13A-TR

STMicroelectronicsIn Stock: 6272SMA6J13A-TR Datasheet

SimilarRFQ

SMAJ13A-TR

STMicroelectronicsIn Stock: 2383SMAJ13A-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the SMAJ13A-TP is determined by the following critical parameters:

Primary Matching Criteria:

• Voltage - Reverse Standoff (Typ): 13V
• Voltage - Breakdown (Min): 14.4V
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

Direct Equivalents maintain identical electrical specifications across voltage ratings, peak pulse current, and power dissipation. These parts are pin-compatible and functionally interchangeable without circuit modification.

Similar Alternatives share the same reverse standoff voltage and package but may differ in clamping voltage, peak pulse current, or power rating. These parts are mechanically compatible but require verification that the application tolerates the parameter variations.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Recommended for Drop-In Replacement):

SMAJ13A (MDD), SMAJ13A-13-F (Diodes Incorporated), SMAJ13A-E3/61 (Vishay), and SZ1SMA13AT3G (Littelfuse) are direct electrical equivalents with identical voltage and current specifications. All are Active status and ROHS3 compliant. Selection among these parts depends on packaging availability (Tape & Reel vs. Cut Tape) and operating temperature requirements. The Littelfuse SZ1SMA13AT3G offers extended lower temperature operation (-65°C) and AEC-Q101 automotive qualification if required.

Similar Alternatives (Application-Dependent):

SM4T15AY (STMicroelectronics) and SMAJ13A-TR (STMicroelectronics) feature higher clamping voltages (27.2V) and peak pulse currents (85A) compared to the main part. These are suitable for applications requiring greater transient energy absorption but must be evaluated for circuit compatibility.

SMA6J13A-TR (STMicroelectronics) and SMA6F13A-M3/6A (Vishay) provide significantly higher peak pulse current (147A) and power dissipation (600W to 4000W). The SMA6F13A-M3/6A uses a different package footprint (DO-221AC SlimSMA) and requires PCB layout verification. These parts are appropriate for high-energy transient protection applications.

All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can SMAJ13A (MDD) be used as a direct replacement for SMAJ13A-TP?

A: Yes. Both parts share identical electrical specifications: 13V reverse standoff, 21.5V clamping voltage, and 18.6A peak pulse current. The primary difference is operating temperature range (MDD: -50 to 150°C vs. Micro Commercial Co: -55 to 175°C). Verify application temperature requirements before substitution.

Q: What is the difference between Direct and Similar substitute categories?

A: Direct equivalents maintain all electrical parameters within the same specification. Similar alternatives share the same reverse standoff voltage and package but differ in clamping voltage, peak pulse current, or power dissipation. Similar parts require circuit analysis to confirm compatibility.

Q: Is SZ1SMA13AT3G suitable for automotive applications?

A: SZ1SMA13AT3G carries AEC-Q101 qualification and is rated for -65 to 150°C operation, making it suitable for automotive-grade transient protection. It is electrically equivalent to SMAJ13A-TP and ROHS3 compliant.

Q: Can SM4T15AY replace SMAJ13A-TP in all applications?

A: SM4T15AY has a higher clamping voltage (27.2V vs. 21.5V) and significantly higher peak pulse current (85A vs. 18.6A). It is mechanically compatible (DO-214AC SMA package) but electrically different. Use only if the application tolerates higher clamping voltage and requires greater transient current handling.

Q: What is the package difference between SMA6F13A-M3/6A and SMAJ13A-TP?

A: SMA6F13A-M3/6A uses DO-221AC (SlimSMA) package with flat leads, while SMAJ13A-TP uses standard DO-214AC (SMA) package. These are not pin-compatible and require different PCB footprints. Verify layout compatibility before selection.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard lead-free manufacturing and storage requirements.