SMAJ14A-13 Transient Voltage Suppressor (TVS) Equivalent & Substitute Parts

Part Overview

The SMAJ14A-13 is a unidirectional Zener transient voltage suppressor diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 14V reverse standoff voltage with a 23.2V maximum clamping voltage and 17.2A peak pulse current capability in a DO-214AC (SMA) package. The original part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers to maintain design continuity and ensure supply chain availability.

Substiute Parts

SMAJ14A-13

Diodes IncorporatedIn Stock: 1007SMAJ14A-13 Datasheet

Current PartRFQ

SMAJ14A-13-F

Diodes IncorporatedIn Stock: 10140SMAJ14A-13-F Datasheet

DirectRFQ

SMAJ14A

Good-Ark SemiconductorIn Stock: 65384SMAJ14A Datasheet

DirectRFQ

SMAJ14A

Good-Ark SemiconductorIn Stock: 65384SMAJ14A Datasheet

DirectRFQ

PTVS14VS1UR,115

Nexperia USA Inc.In Stock: 19032PTVS14VS1UR,115 Datasheet

MFR RecommendedRFQ

SMA6L14A

Littelfuse Inc.In Stock: 3828SMA6L14A Datasheet

MFR RecommendedRFQ

SMAJ14A-TP

Micro Commercial CoIn Stock: 34237SMAJ14A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMAJ14A-13 is determined by strict electrical and mechanical parameter matching:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 14V
• Voltage - Breakdown (Min): 15.6V
• Voltage - Clamping (Max) @ Ipp: 23.2V
• Current - Peak Pulse (10/1000µs): 17.2A minimum
• Power - Peak Pulse: 400W minimum
• Type: Zener, Unidirectional
• Mounting Type: Surface Mount
• Package / Case: DO-214AC (SMA) or equivalent footprint-compatible package

Substitute parts are grouped into three categories based on substitution type:

Direct Manufacturer Substitutes (Same Manufacturer, Same Specifications): Parts with identical electrical specifications and the same base product number (SMAJ14) from the original or alternative manufacturers, differing only in packaging format or product status.

Manufacturer-Recommended Substitutes (Alternative Package, Equivalent Specifications): Parts meeting all electrical specifications but in alternative surface-mount packages (SOD-123W, DO-221AC) that require PCB layout modification but maintain electrical equivalence.

Performance-Enhanced Substitutes (Upgraded Specifications): Parts exceeding minimum specifications in peak pulse current or power dissipation while maintaining voltage parameters, suitable for designs requiring additional margin.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (No PCB Modification Required):

SMAJ14A-13-F (Diodes Incorporated) is the primary substitute, offering identical electrical specifications and DO-214AC (SMA) package compatibility. This part is currently active with ROHS3 compliance and higher inventory availability (10,100 pcs) compared to the discontinued original.

SMAJ14A (Good-Ark Semiconductor) provides equivalent electrical performance with the same package footprint. Inventory availability is significantly higher (65,300 pcs), supporting long-term supply chain stability. Both Diodes and Good-Ark versions are functionally interchangeable.

SMAJ14A-TP (Micro Commercial Co) maintains identical electrical specifications and package compatibility with extended operating temperature range (-55°C ~ 175°C TA), providing additional thermal margin for applications with elevated ambient conditions.

For Applications Requiring Enhanced Performance Margin:

SMA6L14A (Littelfuse Inc.) exceeds minimum specifications with 25.9A peak pulse current and 600W power dissipation (50% higher than the original), while maintaining identical voltage parameters. This part requires DO-221AC package accommodation but is suitable for designs requiring additional transient energy absorption capacity. Operating temperature extends to -65°C minimum.

For Automotive or Qualified Applications:

PTVS14VS1UR,115 (Nexperia USA Inc.) is AEC-Q101 qualified and suitable for automotive-grade applications. This part requires SOD-123W package integration and PCB layout modification but maintains all electrical specifications. Nexperia qualification status supports applications with automotive reliability requirements.

Compliance Consideration:

All active substitute parts are ROHS3 compliant, addressing regulatory requirements that the discontinued original part does not meet. Selection should prioritize active-status parts to ensure long-term availability and compliance with current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can SMAJ14A-13-F be used as a direct replacement without PCB modification?

A: Yes. SMAJ14A-13-F is electrically and mechanically identical to SMAJ14A-13, using the same DO-214AC (SMA) package. No PCB layout changes are required. The primary difference is packaging format (Tape & Reel vs. bulk) and active product status.

Q: What is the difference between SMAJ14A from Good-Ark and SMAJ14A-13-F from Diodes?

A: Both parts are electrically equivalent with identical voltage and current specifications. The difference is manufacturer: Good-Ark vs. Diodes Incorporated. Both use DO-214AC (SMA) packages and are ROHS3 compliant. Good-Ark offers significantly higher inventory availability.

Q: Can SMA6L14A be used as a substitute if my PCB layout cannot accommodate DO-221AC?

A: No. SMA6L14A uses a DO-221AC package with flat leads, which has a different footprint than the DO-214AC (SMA) package of the original part. PCB layout modification is required. If your design is locked to DO-214AC footprint, use SMAJ14A-13-F, SMAJ14A (Good-Ark), or SMAJ14A-TP instead.

Q: Is PTVS14VS1UR,115 compatible with my existing PCB designed for SMA package?

A: No. PTVS14VS1UR,115 uses SOD-123W package, which has a different footprint than DO-214AC (SMA). PCB layout modification is required. This part is recommended only for new designs or boards that can accommodate SOD-123W footprint.

Q: What is the advantage of SMA6L14A over SMAJ14A-13?

A: SMA6L14A provides 50% higher peak pulse current (25.9A vs. 17.2A) and 50% higher power dissipation (600W vs. 400W) while maintaining identical voltage specifications. This provides additional margin for transient energy absorption. The trade-off is package change from DO-214AC to DO-221AC, requiring PCB modification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active substitute parts listed (SMAJ14A-13-F, SMAJ14A, PTVS14VS1UR,115, SMA6L14A, SMAJ14A-TP) are ROHS3 compliant. The original SMAJ14A-13 is not ROHS3 compliant, making active substitutes necessary for regulatory compliance.

Q: Which substitute has the widest operating temperature range?

A: SMAJ14A-TP (Micro Commercial Co) offers the widest operating temperature range at -55°C ~ 175°C (TA), providing 25°C additional upper temperature margin compared to the original specification of -55°C ~ 150°C (TJ).

Q: Can I use PTVS14VS1UR,115 in a non-automotive application?

A: Yes. PTVS14VS1UR,115 is AEC-Q101 qualified for automotive use but is not restricted to automotive applications. It meets all electrical specifications for general-purpose transient voltage suppression and can be used in any application requiring 14V standoff voltage protection.