1SMB11CAT3 Equivalent & Substitute Parts

Part Overview

The 1SMB11CAT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface mount applications. This component features an 11V reverse standoff voltage with an 18.2V maximum clamping voltage and 33A peak pulse current capability in the DO-214AA (SMB) package. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Substiute Parts

1SMB11CAT3

onsemiIn Stock: 10531SMB11CAT3 Datasheet

Current PartRFQ

SMBJ11CA

Fairchild SemiconductorIn Stock: 69014SMBJ11CA Datasheet

DirectRFQ

SMBJ11CA

Fairchild SemiconductorIn Stock: 69014SMBJ11CA Datasheet

DirectRFQ

SMBJ11CA

Fairchild SemiconductorIn Stock: 69014SMBJ11CA Datasheet

DirectRFQ

SMBJ11CA-13-F

Diodes IncorporatedIn Stock: 4933SMBJ11CA-13-F Datasheet

SimilarRFQ

SMBJ11CA-TP

Micro Commercial CoIn Stock: 3301SMBJ11CA-TP Datasheet

SimilarRFQ

SMBJ11CAE3/TR13

Microchip TechnologyIn Stock: 792SMBJ11CAE3/TR13 Datasheet

SimilarRFQ

SMBJ11CE3/TR13

Microchip TechnologyIn Stock: 886SMBJ11CE3/TR13 Datasheet

SimilarRFQ

TV06B110JB-G

Comchip TechnologyIn Stock: 1254TV06B110JB-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1SMB11CAT3 is determined by strict electrical and mechanical parameter matching:

Critical Parameters for Substitution:

• Voltage - Reverse Standoff (Typ): 11V
• Voltage - Breakdown (Min): 12.2V
• Voltage - Clamping (Max) @ Ipp: 18.2V
• Current - Peak Pulse (10/1000µs): 33A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

Substitute parts are grouped into two categories:

Direct Equivalents: Parts with identical electrical specifications (18.2V clamping, 33A peak pulse current) and the same DO-214AA package. These include SMBJ11CA from Fairchild Semiconductor, SMBJ11CA-13-F from Diodes Incorporated, SMBJ11CA-TP from Micro Commercial Co, and SMBJ11CAE3/TR13 from Microchip Technology.

Similar Equivalents: Parts with matching voltage and current parameters but minor variations in clamping voltage or peak pulse current within acceptable tolerance. SMBJ11CE3/TR13 (20.1V clamping, 29.9A peak pulse) and TV06B110JB-G (18.2V clamping, 32.97A peak pulse) fall into this category.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Identical Electrical Specifications):

SMBJ11CA from Fairchild Semiconductor, SMBJ11CA-13-F from Diodes Incorporated, SMBJ11CA-TP from Micro Commercial Co, and SMBJ11CAE3/TR13 from Microchip Technology are direct functional equivalents with matching 18.2V clamping voltage and 33A peak pulse current. All substitute parts are in active production status, ensuring long-term availability. SMBJ11CA-13-F, SMBJ11CA-TP, and SMBJ11CAE3/TR13 carry ROHS3 compliance certification, meeting modern environmental and regulatory requirements. SMBJ11CA-TP supports an extended operating temperature range of -55°C to 175°C, providing additional thermal margin for demanding applications.

Secondary Substitutes (Minor Parameter Variations):

SMBJ11CE3/TR13 from Microchip Technology exhibits a higher clamping voltage of 20.1V with a slightly reduced peak pulse current of 29.9A. This part is suitable for applications where the higher clamping voltage is acceptable and peak pulse current requirements do not exceed 29.9A. TV06B110JB-G from Comchip Technology maintains the 18.2V clamping voltage with a peak pulse current of 32.97A, providing near-identical performance to the original part. Both secondary substitutes are ROHS3 compliant and in active production.

Frequently Asked Questions (FAQ)

Q: Can SMBJ11CA from Fairchild Semiconductor directly replace the 1SMB11CAT3?

A: Yes. SMBJ11CA provides identical electrical specifications with 11V reverse standoff voltage, 12.2V minimum breakdown voltage, 18.2V maximum clamping voltage, and 33A peak pulse current. Both use the DO-214AA (SMB) surface mount package. The primary difference is product status: SMBJ11CA is active production while 1SMB11CAT3 is obsolete.

Q: What is the difference between SMBJ11CAE3/TR13 and SMBJ11CE3/TR13?

A: Both are Microchip Technology products in the SMBJ series with 11V reverse standoff voltage. SMBJ11CAE3/TR13 maintains 18.2V clamping voltage and 33A peak pulse current, matching the original 1SMB11CAT3 specifications. SMBJ11CE3/TR13 has a higher clamping voltage of 20.1V with reduced peak pulse current of 29.9A. Selection depends on whether the application requires the exact 18.2V clamping specification.

Q: Are all substitute parts RoHS compliant?

A: SMBJ11CA-13-F, SMBJ11CA-TP, SMBJ11CAE3/TR13, SMBJ11CE3/TR13, and TV06B110JB-G are all ROHS3 compliant. SMBJ11CA from Fairchild Semiconductor does not specify RoHS status in the provided data. The original 1SMB11CAT3 is RoHS non-compliant.

Q: What packaging options are available for substitute parts?

A: All substitute parts use the DO-214AA (SMB) surface mount package, maintaining mechanical compatibility with the original 1SMB11CAT3. Packaging formats vary by manufacturer: SMBJ11CA is supplied in bulk, while SMBJ11CA-13-F, SMBJ11CA-TP, SMBJ11CAE3/TR13, SMBJ11CE3/TR13, and TV06B110JB-G are supplied in Tape & Reel format.

Q: Which substitute offers the widest operating temperature range?

A: SMBJ11CA-TP from Micro Commercial Co supports -55°C to 175°C, providing the widest temperature range among all substitutes. The original 1SMB11CAT3 and SMBJ11CAE3/TR13 and SMBJ11CE3/TR13 support -65°C to 150°C. SMBJ11CA supports -55°C to 150°C.

Q: Can TV06B110JB-G be used as a direct replacement?

A: TV06B110JB-G is functionally equivalent with 18.2V clamping voltage and 32.97A peak pulse current, differing from the original 33A specification by only 0.03A. It uses the same DO-214AA package and is ROHS3 compliant. Operating temperature is not specified for this part.