1SMA10AT3 Equivalent & Substitute Parts

Part Overview

The 1SMA10AT3 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by onsemi, rated for 400W peak pulse power at 10V reverse standoff voltage. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates in the SMA package form factor and provides transient voltage clamping for general-purpose circuit protection applications.

Substiute Parts

1SMA10AT3

onsemiIn Stock: 7311SMA10AT3 Datasheet

Current PartRFQ

SMAJ10A

MDDIn Stock: 20258SMAJ10A Datasheet

DirectRFQ

PTVS10VS1UR,115

Nexperia USA Inc.In Stock: 18708PTVS10VS1UR,115 Datasheet

SimilarRFQ

SMAJ10A-TP

Micro Commercial CoIn Stock: 5198SMAJ10A-TP Datasheet

SimilarRFQ

TV04A100JB-G

Comchip TechnologyIn Stock: 1006TV04A100JB-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 1SMA10AT3 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 10V
• Power - Peak Pulse: 400W
• Package / Case: SMA (DO-214AC)
• Mounting Type: Surface Mount
• Unidirectional Configuration: Single channel

All substitute parts listed maintain these core electrical and mechanical specifications. Substitute parts are grouped as direct equivalents when they match the reverse standoff voltage, peak pulse power rating, and package form factor. Variations in clamping voltage, breakdown voltage, and peak pulse current are within acceptable tolerance ranges for TVS diode substitution.

Parameter Comparison

Engineering Selection Recommendations

SMAJ10A (MDD) and SMAJ10A-TP (Micro Commercial Co) are direct SMA package equivalents with active product status and ROHS3 compliance. Both maintain the 10V reverse standoff voltage and 400W peak pulse power specification. SMAJ10A-TP offers an extended operating temperature range to 175°C, suitable for high-temperature applications.

PTVS10VS1UR,115 (Nexperia USA Inc.) is an active substitute with automotive-grade qualification (AEC-Q101) and ROHS3 compliance. This part uses the SOD-123W package instead of SMA, requiring PCB layout modification. The automotive qualification provides additional reliability assurance for demanding environments.

TV04A100JB-G (Comchip Technology) is an active substitute with ROHS3 compliance. This part is bidirectional rather than unidirectional, which may affect circuit behavior in applications requiring strict directional clamping. Verify circuit requirements before selection.

All substitute parts are ROHS3 compliant, addressing the RoHS non-compliance status of the obsolete 1SMA10AT3. Selection should prioritize active product status and compliance requirements for new designs.

Frequently Asked Questions (FAQ)

Q: Can PTVS10VS1UR,115 replace 1SMA10AT3 directly on the PCB?

A: No. PTVS10VS1UR,115 uses SOD-123W package while 1SMA10AT3 uses SMA package. PCB footprint and layout modifications are required. Verify pad spacing and trace routing compatibility before substitution.

Q: What is the difference between unidirectional and bidirectional TVS diodes?

A: Unidirectional TVS diodes (1SMA10AT3, SMAJ10A, SMAJ10A-TP, PTVS10VS1UR,115) clamp transients in one direction only. Bidirectional TVS diodes (TV04A100JB-G) clamp transients in both directions. Circuit application determines which type is appropriate.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant. The original 1SMA10AT3 is RoHS non-compliant. Compliance requirements for new designs or regulated markets necessitate selection of compliant alternatives.

Q: Which substitute offers the widest operating temperature range?

A: SMAJ10A-TP (Micro Commercial Co) operates from -55°C to 175°C, providing the widest temperature range among listed substitutes. Other parts are rated to 150°C maximum.

Q: Is automotive qualification required for my application?

A: Automotive qualification (AEC-Q101) is required only for automotive or safety-critical applications. PTVS10VS1UR,115 carries this qualification. General-purpose applications do not require this certification.

Q: What inventory levels are available for each substitute?

A: SMAJ10A (MDD): 20,200 pcs; PTVS10VS1UR,115 (Nexperia): 18,660 pcs; SMAJ10A-TP (Micro Commercial Co): 5,123 pcs; TV04A100JB-G (Comchip): 925 pcs. Verify current availability with suppliers before procurement.