SMBJ70CA-T7 Equivalent & Substitute Parts

Part Overview

The SMBJ70CA-T7 is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a 70V reverse standoff voltage and 113V maximum clamping voltage, providing 600W peak pulse power dissipation in a compact DO-214AA (SMB) package. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility, enabling design flexibility and supply chain alternatives while maintaining circuit protection specifications.

Substiute Parts

SMBJ70CA-T7

Littelfuse Inc.In Stock: 1044SMBJ70CA-T7 Datasheet

Current PartRFQ

SMBJ70CA

Semtech CorporationIn Stock: 10272SMBJ70CA Datasheet

DirectRFQ

SMBJ70CA

Semtech CorporationIn Stock: 10272SMBJ70CA Datasheet

DirectRFQ

SMBJ70CA

Semtech CorporationIn Stock: 10272SMBJ70CA Datasheet

DirectRFQ

SMBJ70CA-13-F

Diodes IncorporatedIn Stock: 6063SMBJ70CA-13-F Datasheet

DirectRFQ

SMBJ70CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 1678SMBJ70CA-E3/52 Datasheet

DirectRFQ

SMBJ70CA-TP

Micro Commercial CoIn Stock: 9950SMBJ70CA-TP Datasheet

DirectRFQ

SM6T82CAY

STMicroelectronicsIn Stock: 1503SM6T82CAY Datasheet

MFR RecommendedRFQ

SMBJ70CA-TR

STMicroelectronicsIn Stock: 5917SMBJ70CA-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ70CA-T7 are classified into two categories based on electrical and mechanical compatibility:

Direct Electrical Equivalents maintain identical or functionally equivalent electrical specifications:

• Voltage - Reverse Standoff (Typ): 70V
• Voltage - Clamping (Max) @ Ipp: 113V
• Current - Peak Pulse (10/1000µs): 5.3A (±tolerance)
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Type: Zener, Bidirectional (1 channel)

Manufacturer-Recommended Alternatives meet the core voltage and power specifications but may have different peak current ratings or temperature ranges, suitable for applications where these variations are acceptable.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Electrical Equivalents): SMBJ70CA (Semtech), SMBJ70CA-13-F (Diodes Incorporated), SMBJ70CA-E3/52 (Vishay), and SMBJ70CA-TP (Micro Commercial Co) are functionally equivalent to the SMBJ70CA-T7. All maintain identical voltage specifications (70V standoff, 113V clamping) and 5.3A peak pulse current. All are ROHS3 compliant with MSL 1 rating. These parts are suitable for direct replacement in applications where the operating temperature range of -55°C to 175°C is acceptable.

Near-Equivalent Substitute: SMBJ70CA-TR (STMicroelectronics) provides equivalent voltage protection with a marginally higher peak pulse current of 5.5A, offering enhanced transient handling capability. This part is ROHS3 compliant and suitable for applications requiring additional current margin.

Alternative with Enhanced Performance: SM6T82CAY (STMicroelectronics) maintains the 70V standoff voltage but features a higher clamping voltage of 146V and significantly increased peak pulse current of 27A (8/20µs pulse). This part carries AEC-Q101 automotive qualification and is suitable for applications requiring higher transient energy absorption. The elevated clamping voltage must be verified against circuit requirements before selection.

All substitute parts are active products with established supply availability and comply with ROHS3 and REACH requirements.

Frequently Asked Questions (FAQ)

Q: Can SMBJ70CA-TR be used as a direct replacement for SMBJ70CA-T7? A: Yes. SMBJ70CA-TR maintains identical voltage specifications (70V standoff, 113V clamping) and equivalent peak pulse current (5.5A vs. 5.3A). The marginal current increase provides additional transient protection margin. Both parts use the same DO-214AA (SMB) package and are ROHS3 compliant.

Q: What is the difference between SMBJ70CA variants from different manufacturers? A: All SMBJ70CA variants (Semtech, Diodes Incorporated, Vishay, Micro Commercial Co) share identical electrical specifications: 70V standoff, 113V clamping, 5.3A peak pulse current, and 600W power dissipation. Differences exist in operating temperature ranges and packaging options (Tape & Reel vs. Cut Tape). Selection depends on temperature requirements and supply chain availability.

Q: Is SM6T82CAY a suitable substitute? A: SM6T82CAY is a manufacturer-recommended alternative that maintains the 70V standoff voltage but increases clamping voltage to 146V and peak pulse current to 27A. This part is suitable only if the circuit design can accommodate the higher clamping voltage. Verify that downstream components tolerate 146V clamping before substitution. SM6T82CAY carries AEC-Q101 automotive qualification.

Q: What packaging options are available for SMBJ70CA substitutes? A: Substitute parts are available in Tape & Reel (TR) and Cut Tape (CT) with Digi-Reel packaging. SMBJ70CA-TP offers Cut Tape packaging, while other variants use Tape & Reel. Packaging selection depends on assembly process requirements and volume.

Q: Are all substitutes ROHS3 compliant? A: Yes. All listed substitute parts (SMBJ70CA variants and SMBJ70CA-TR) are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity). SM6T82CAY is also ROHS3 compliant. All parts are REACH unaffected.

Q: What is the temperature operating range consideration for substitution? A: The SMBJ70CA-T7 operates from -65°C to 150°C. Most substitutes operate from -55°C to 150°C or -55°C to 175°C. If the application requires operation below -55°C, verify that the substitute part's lower temperature limit meets circuit requirements. For standard commercial and industrial applications, -55°C minimum is typically sufficient.