SMAJ16A-13 Equivalent & Substitute Parts

Part Overview

The SMAJ16A-13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in surface-mount applications. The device features a 16V reverse standoff voltage, 26V maximum clamping voltage, and 15.3A peak pulse current capability in a DO-214AC (SMA) package. This 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

SMAJ16A-13

Diodes IncorporatedIn Stock: 1097SMAJ16A-13 Datasheet

Current PartRFQ

SMAJ16A-13-F

Diodes IncorporatedIn Stock: 35161SMAJ16A-13-F Datasheet

DirectRFQ

PTVS16VS1UR,115

Nexperia USA Inc.In Stock: 18739PTVS16VS1UR,115 Datasheet

MFR RecommendedRFQ

SMAJ16A

EVVO SemiIn Stock: 10276SMAJ16A Datasheet

MFR RecommendedRFQ

SMAJ16A

EVVO SemiIn Stock: 10276SMAJ16A Datasheet

MFR RecommendedRFQ

SMAJ16A-TP

Micro Commercial CoIn Stock: 9672SMAJ16A-TP Datasheet

MFR RecommendedRFQ

SZ1SMA16AT3G

Littelfuse Inc.In Stock: 4571SZ1SMA16AT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMAJ16A-13 is determined by strict electrical and mechanical parameter matching within the TVS diode category. The following criteria establish substitution validity:

Critical Matching Parameters:

• Unidirectional channel configuration (1 channel required)
• Voltage - Reverse Standoff: 16V nominal
• Voltage - Breakdown (Min): 17.8V minimum
• Voltage - Clamping (Max) @ Ipp: 26V maximum
• Current - Peak Pulse (10/1000µs): 15.3A or greater
• Power - Peak Pulse: 400W or greater
• Mounting Type: Surface Mount
• Package compatibility: DO-214AC (SMA) or equivalent footprint

Substitute parts are grouped into two categories based on package type: SMA package variants (direct footprint compatibility) and SOD-123W package variants (alternative surface-mount option with identical electrical performance). All listed substitutes meet or exceed the electrical specifications of the original part.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (SMA Package): SMAJ16A-13-F from Diodes Incorporated is the primary substitute, offering identical electrical specifications and the same DO-214AC (SMA) package footprint. This part is currently in active production with high inventory availability (35,100 units) and meets ROHS3 compliance requirements, addressing the RoHS non-compliance status of the original SMAJ16A-13.

Alternative SMA Package Options: SMAJ16A-TP (Micro Commercial Co) and SMAJ16A (EVVO Semi) provide equivalent electrical performance in the SMA package with extended operating temperature ranges (-55 to 175°C and -65 to 150°C respectively). Both are ROHS3 compliant and actively produced.

Automotive-Qualified Alternative (SOD-123W Package): PTVS16VS1UR,115 from Nexperia USA Inc. and SZ1SMA16AT3G from Littelfuse Inc. are automotive-grade TVS diodes (AEC-Q101 qualified) with identical electrical specifications. These parts use the SOD-123W package instead of SMA, requiring PCB layout modification but offering automotive qualification for applications requiring this certification.

Compliance Consideration: All active substitute parts listed are ROHS3 compliant, whereas the original SMAJ16A-13 is non-compliant. Selection should account for end-product RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can SMAJ16A-13-F be used as a direct replacement for SMAJ16A-13? A: Yes. SMAJ16A-13-F matches all critical electrical parameters (16V standoff, 26V clamping, 15.3A peak pulse, 400W peak power) and uses the identical DO-214AC (SMA) package. No PCB layout changes are required. The primary difference is product status (active vs. discontinued) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between SMA and SOD-123W packages? A: Both are surface-mount packages suitable for automated assembly. SMA (DO-214AC) is larger and commonly used for higher-power applications. SOD-123W is a smaller package. Electrical performance is identical; package selection depends on PCB space constraints and existing layout design. Footprint changes are required when switching between these packages.

Q: Are the EVVO Semi and Micro Commercial Co parts equivalent to the original Diodes Incorporated part? A: Yes, within the specified electrical parameters. All three manufacturers' parts meet the 16V standoff, 26V clamping, and 15.3A to 15.4A peak pulse specifications. Differences exist in operating temperature ranges and packaging options. Selection should be based on supply availability, temperature requirements, and RoHS compliance needs.

Q: Why are some substitutes listed as automotive-grade (AEC-Q101)? A: PTVS16VS1UR,115 and SZ1SMA16AT3G carry AEC-Q101 automotive qualification, indicating they meet automotive industry reliability and quality standards. This certification is required for automotive applications but is not necessary for general-purpose industrial or consumer applications. Non-automotive-qualified parts are suitable for non-automotive applications.

Q: Can I use a substitute part with a higher operating temperature range? A: Yes. Parts with extended temperature ranges (such as SMAJ16A-TP at -55 to 175°C) are backward-compatible with designs requiring the original -55 to 150°C range. Extended temperature capability does not affect performance in standard temperature environments.

Q: What inventory status should I consider when selecting a substitute? A: All listed substitutes are currently in active production with available inventory. SMAJ16A-13-F has the highest inventory (35,100 units), followed by SMAJ16A from EVVO Semi (10,200 units). Inventory levels may change; verification with suppliers is recommended for long-term procurement planning.