SMBG33A-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBG33A-E3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates within the TransZorb® series and is designed for general-purpose transient voltage suppression applications. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters and compatible package specifications to ensure functional interchangeability in circuit designs.

Substiute Parts

SMBG33A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 857SMBG33A-E3/5B Datasheet

Current PartRFQ

SMBG33A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 12256SMBG33A-E3/52 Datasheet

DirectRFQ

SMBJ33A-TR

STMicroelectronicsIn Stock: 5301SMBJ33A-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBG33A-E3/5B are identified based on the following critical parameters that determine functional interchangeability:

• Voltage - Reverse Standoff (Typ): 33V
• Voltage - Breakdown (Min): 36.7V
• Voltage - Clamping (Max) @ Ipp: 53.3V
• Current - Peak Pulse (10/1000µs): 11.3A minimum
• Power - Peak Pulse: 600W
• Operating Temperature Range: -55°C to 150°C (TJ)
• Unidirectional Channels: 1
• Surface Mount configuration

Parts meeting these electrical specifications are classified as direct substitutes. Packaging variations (DO-215AA versus DO-214AA) remain compatible within surface mount assembly processes when footprint and lead configuration accommodate the alternative package type.

Parameter Comparison

Engineering Selection Recommendations

All three parts—SMBG33A-E3/5B, SMBG33A-E3/52, and SMBJ33A-TR—maintain active production status and meet RoHS3 compliance requirements. Both Vishay parts (SMBG33A-E3/5B and SMBG33A-E3/52) are identical in electrical performance and package specification, differing only in packaging format (Tape & Reel designation). The STMicroelectronics SMBJ33A-TR offers equivalent electrical performance with a marginally higher peak pulse current rating (11.8A versus 11.3A) and operates within the same temperature range. Package compatibility must be evaluated at the PCB assembly level, as the SMBJ33A-TR uses DO-214AA packaging compared to the DO-215AA specification of the primary part. All parts carry unlimited moisture sensitivity classification and REACH unaffected status, supporting deployment in regulated environments.

Frequently Asked Questions (FAQ)

Q: Can SMBG33A-E3/52 be used as a direct replacement for SMBG33A-E3/5B?

A: Yes. Both parts are manufactured by Vishay General Semiconductor and share identical electrical specifications, including voltage ratings, clamping characteristics, and peak pulse current. The difference lies in packaging format designation only.

Q: Is SMBJ33A-TR electrically compatible with SMBG33A-E3/5B?

A: Yes, with package consideration. The SMBJ33A-TR meets all critical electrical parameters: 33V reverse standoff voltage, 36.7V minimum breakdown voltage, 53.3V maximum clamping voltage, and 600W peak pulse power. The peak pulse current is 11.8A, which exceeds the 11.3A specification of the primary part. However, the SMBJ33A-TR uses DO-214AA packaging instead of DO-215AA, requiring PCB footprint verification before substitution.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by: reverse standoff voltage (33V), breakdown voltage (36.7V minimum), clamping voltage (53.3V maximum), peak pulse current (minimum 11.3A), power rating (600W), operating temperature range (-55°C to 150°C), and unidirectional channel configuration (1 channel). Package type and mounting method must also be compatible with the circuit design.

Q: Are there inventory considerations when selecting a substitute?

A: Inventory levels are provided for reference: SMBG33A-E3/5B (750 Pcs), SMBG33A-E3/52 (12,200 Pcs), and SMBJ33A-TR (5,200 Pcs). Availability may influence procurement decisions based on project timeline and volume requirements.

Q: Do all three parts meet regulatory compliance requirements?

A: Yes. All three parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity classification. All parts are in active production status.