SZ1SMA16AT3G Equivalent & Substitute Parts

Part Overview

The SZ1SMA16AT3G is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in the DO-214AC (SMA) package. This component operates with a 16V reverse standoff voltage and 26V maximum clamping voltage, delivering 15.4A peak pulse current with 400W peak pulse power handling. The device is classified as Active product status with AEC-Q101 automotive qualification and ROHS3 compliance. Substitute parts are identified to address supply chain requirements, packaging format preferences, or manufacturer availability while maintaining electrical and mechanical compatibility.

Substiute Parts

SZ1SMA16AT3G

Littelfuse Inc.In Stock: 4571SZ1SMA16AT3G Datasheet

Current PartRFQ

SMAJ16A

EVVO SemiIn Stock: 10276SMAJ16A Datasheet

DirectRFQ

SMAJ16A

EVVO SemiIn Stock: 10276SMAJ16A Datasheet

DirectRFQ

SMAJ16A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 18436SMAJ16A-E3/61 Datasheet

DirectRFQ

SMAJ16A-13-F

Diodes IncorporatedIn Stock: 35161SMAJ16A-13-F Datasheet

MFR RecommendedRFQ

SMAJ16A-TP

Micro Commercial CoIn Stock: 9672SMAJ16A-TP Datasheet

MFR RecommendedRFQ

SMAJE16AH

Eaton - Electronics DivisionIn Stock: 5737SMAJE16AH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SZ1SMA16AT3G are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 16V
• Voltage - Breakdown (Min): 17.8V
• Voltage - Clamping (Max) @ Ipp: 26V
• Current - Peak Pulse (10/1000µs): 15.3A to 15.4A
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional (1 channel)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts maintain these core electrical specifications and package compatibility. Variations in operating temperature range, packaging format (Tape & Reel vs. Cut Tape), and manufacturer certifications are noted but do not affect functional substitution within the specified electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain full electrical compatibility with the SZ1SMA16AT3G across the specified voltage, current, and power parameters. Selection among substitutes should be based on the following factors:

Product Status & Availability: All substitute parts are classified as Active. SMAJ16A-13-F from Diodes Incorporated offers the highest inventory level (35,100 pcs), followed by SMAJ16A-E3/61 from Vishay (18,372 pcs). SMAJ16A from EVVO Semi provides 10,200 pcs, while SMAJE16AH from Eaton and SMAJ16A-TP from Micro Commercial Co offer 5,637 pcs and 9,647 pcs respectively.

Compliance & Certification: The SZ1SMA16AT3G carries AEC-Q101 automotive qualification. SMAJE16AH from Eaton also includes AEC-Q101 automotive qualification, making it the preferred substitute for automotive applications requiring this certification. All other substitutes maintain ROHS3 compliance without automotive qualification.

Operating Temperature Range: The SZ1SMA16AT3G operates from -65°C to 150°C (TJ). SMAJ16A from EVVO Semi matches this range exactly. SMAJ16A-E3/61, SMAJ16A-13-F, and SMAJE16AH operate from -55°C to 150°C (TJ), representing a narrower low-temperature range. SMAJ16A-TP from Micro Commercial Co extends to -55°C to 175°C (TA), providing enhanced high-temperature performance.

Packaging Format: All substitutes are supplied in DO-214AC (SMA) surface mount packages. The SZ1SMA16AT3G and SMAJE16AH are supplied in Tape & Reel (TR) format. SMAJ16A is supplied in Cut Tape (CT) & Digi-Reel® format. SMAJ16A-E3/61 is supplied in Tape & Reel (TR). SMAJ16A-13-F is supplied in Cut Tape (CT) & Digi-Reel® format. SMAJ16A-TP is supplied in Tape & Reel (TR).

Peak Pulse Current: SMAJ16A and SMAJE16AH deliver 15.4A peak pulse current, matching the SZ1SMA16AT3G specification. SMAJ16A-13-F and SMAJ16A-TP deliver 15.3A peak pulse current, representing a 0.1A reduction within acceptable tolerance for this component class.

Frequently Asked Questions (FAQ)

Q: Can SMAJ16A-13-F be used as a direct replacement for SZ1SMA16AT3G?

A: Yes. SMAJ16A-13-F maintains all critical electrical parameters: 16V reverse standoff, 17.8V breakdown minimum, 26V clamping maximum, and 400W peak pulse power. The peak pulse current specification is 15.3A versus 15.4A on the original part, a 0.1A difference within acceptable substitution tolerance. Both are ROHS3 compliant and packaged in DO-214AC (SMA) surface mount format. The operating temperature range is -55°C to 150°C (TJ) versus -65°C to 150°C (TJ) on the original, representing a narrower low-temperature specification.

Q: Which substitute part is recommended for automotive applications?

A: SMAJE16AH from Eaton - Electronics Division is the recommended substitute for automotive applications. It carries AEC-Q101 automotive qualification matching the SZ1SMA16AT3G. It maintains identical electrical specifications (16V standoff, 17.8V breakdown, 26V clamping, 15.4A peak pulse, 400W peak power) and is supplied in Tape & Reel (TR) packaging. Operating temperature range is -55°C to 150°C (TJ).

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Both Tape & Reel (TR) and Cut Tape (CT) formats are surface mount packaging methods suitable for automated assembly. Tape & Reel is continuous reel format for high-volume production runs. Cut Tape & Digi-Reel® format provides smaller quantity packaging for lower-volume applications or mixed component orders. Electrical and mechanical specifications remain identical between packaging formats.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range does not affect electrical substitution compatibility within the specified voltage and current parameters. However, application requirements must be evaluated. The SZ1SMA16AT3G operates from -65°C to 150°C (TJ). Substitutes SMAJ16A-E3/61, SMAJ16A-13-F, and SMAJE16AH operate from -55°C to 150°C (TJ), providing a narrower low-temperature specification. SMAJ16A-TP extends to -55°C to 175°C (TA), offering enhanced high-temperature performance. Select the substitute based on your application's actual temperature requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts are ROHS3 compliant, matching the SZ1SMA16AT3G compliance status. All parts also carry Moisture Sensitivity Level (MSL) 1 (Unlimited) rating.

Q: What is the significance of the 0.1A difference in peak pulse current between parts?

A: SMAJ16A and SMAJE16AH deliver 15.4A peak pulse current matching the SZ1SMA16AT3G. SMAJ16A-13-F and SMAJ16A-TP deliver 15.3A peak pulse current. This 0.1A difference represents less than 1% variation and is within acceptable tolerance for TVS diode substitution in this voltage class. Both specifications deliver the required 400W peak pulse power handling.