SMBG70A-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBG70A-E3/5B is an active Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This unidirectional zener diode is designed for general-purpose transient voltage suppression applications in surface mount configurations. The part operates across a temperature range of -55°C to 150°C and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Finding equivalent substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and maintain component availability across different procurement channels.

Substiute Parts

SMBG70A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1088SMBG70A-E3/5B Datasheet

Current PartRFQ

SMBJ70A-TR

STMicroelectronicsIn Stock: 12994SMBJ70A-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBG70A-E3/5B is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 70V (nominal)
• Voltage - Breakdown (Min): 77.8V
• Voltage - Clamping (Max) @ Ipp: 113V
• Current - Peak Pulse (10/1000µs): minimum 5.3A
• Power - Peak Pulse: 600W
• Operating Temperature Range: -55°C to 150°C
• Unidirectional zener diode configuration
• Surface mount technology
• RoHS3 compliance

The SMBJ70A-TR from STMicroelectronics meets all substitution criteria. Both parts share identical voltage specifications, equivalent peak pulse current ratings (5.5A vs 5.3A), and matching power dissipation capabilities. Both operate within the same temperature range and maintain RoHS3 compliance. Package differences (DO-215AA vs DO-214AA) represent minor mechanical variations within the SMB form factor family, both suitable for standard surface mount assembly processes.

Parameter Comparison

Engineering Selection Recommendations

Both the SMBG70A-E3/5B and SMBJ70A-TR are active products with confirmed RoHS3 compliance and REACH unaffected status. The SMBJ70A-TR offers a marginal advantage in peak pulse current rating (5.5A versus 5.3A), providing additional design margin within the same power dissipation envelope. Both parts maintain identical voltage specifications and operating temperature ranges, ensuring functional equivalence in transient suppression applications. Selection between these parts should be based on supply chain availability, packaging preference (DO-215AA versus DO-214AA), and procurement lead times. The SMBJ70A-TR currently shows higher inventory availability (12,900 pieces versus 1,051 pieces).

Frequently Asked Questions (FAQ)

Q: Can the SMBJ70A-TR directly replace the SMBG70A-E3/5B in existing designs?

A: Yes. Both parts share identical voltage specifications (70V standoff, 77.8V breakdown minimum, 113V clamping maximum) and equivalent current ratings. The SMBJ70A-TR's slightly higher peak pulse current (5.5A) provides additional margin. Both operate across -55°C to 150°C and maintain RoHS3 compliance.

Q: What is the difference between DO-215AA and DO-214AA packages?

A: Both are SMB form factor packages suitable for surface mount assembly. DO-215AA (SMBG) and DO-214AA (SMBJ) represent minor mechanical variations within the same family. Standard pick-and-place equipment accommodates both package types without modification.

Q: Are there any compliance or certification differences?

A: No. Both parts are RoHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Q: Which part should be selected for new designs?

A: Selection depends on supply chain strategy and availability. The SMBJ70A-TR offers higher current rating (5.5A) and greater inventory availability. Both are equally suitable for general-purpose transient voltage suppression applications.

Q: Are there any thermal or reliability differences?

A: No. Both parts operate across the same temperature range (-55°C to 150°C junction temperature) and carry identical moisture sensitivity ratings (MSL 1, unlimited).