SMBJ70CA-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ70CA-M3/5B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and provides transient overvoltage protection for general-purpose applications. The part is active and widely stocked, with 947 units available in inventory. Equivalent and substitute parts are identified based on matching electrical characteristics and mechanical compatibility within the SMBJ70 base product family.

Substiute Parts

SMBJ70CA-M3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 973SMBJ70CA-M3/5B Datasheet

Current PartRFQ

SMBJ70CA-E3/52

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

DirectRFQ

SMBJ70CA-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1413SMBJ70CA-E3/5B Datasheet

MFR RecommendedRFQ

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-TP

Micro Commercial CoIn Stock: 9950SMBJ70CA-TP Datasheet

DirectRFQ

SMBJ70CA-TR

STMicroelectronicsIn Stock: 5917SMBJ70CA-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ70CA-M3/5B are qualified based on the following criteria:

Electrical Parameters (Critical for Substitution):

• Voltage - Reverse Standoff (Typ): 70V
• Voltage - Breakdown (Min): 77.8V
• Voltage - Clamping (Max) @ Ipp: 113V
• Current - Peak Pulse (10/1000µs): 5.3A (or higher)
• Power - Peak Pulse: 600W
• Bidirectional Channels: 1
• Type: Zener

Mechanical Parameters (Required for Compatibility):

• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Product Status: Active

All identified substitutes maintain identical electrical performance within the specified operating range and are housed in the same surface mount package. Packaging format variations (Tape & Reel, Cut Tape) do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain full electrical and mechanical compatibility with the SMBJ70CA-M3/5B. Selection among substitutes should be based on:

Inventory Availability: SMBJ70CA (Semtech) offers the highest stock level at 10,200 units. SMBJ70CA-E3/5B (Vishay) provides 1,390 units with manufacturer recommendation status.

Operating Temperature Range: The SMBJ70CA (Semtech) and SMBJ70CA-TP (Micro Commercial Co) extend the upper operating temperature to 175°C, compared to 150°C for other variants. This provides additional thermal margin in high-temperature applications.

Peak Pulse Current: The SMBJ70CA-TR (STMicroelectronics) specifies 5.5A peak pulse current, exceeding the 5.3A baseline. This represents a performance enhancement suitable for applications requiring higher transient current handling.

Compliance Status: All Vishay, Diodes Incorporated, and Micro Commercial Co variants carry ROHS3 compliance certification. The Semtech SMBJ70CA does not specify RoHS status in the provided data.

Packaging Format: Tape & Reel (TR) and Cut Tape (CT) formats are functionally equivalent for component selection; packaging choice depends on assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can SMBJ70CA-E3/5B replace SMBJ70CA-M3/5B directly?

A: Yes. Both parts are manufactured by Vishay and share identical electrical specifications: 70V reverse standoff, 77.8V breakdown minimum, 113V clamping voltage, and 5.3A peak pulse current. The suffix variation (E3/5B vs. M3/5B) indicates packaging format differences only, not electrical performance.

Q: What is the difference between SMBJ70CA variants from different manufacturers?

A: All SMBJ70CA variants maintain the same core electrical parameters (70V standoff, 113V clamp, 5.3A peak pulse). Differences exist in operating temperature range (150°C vs. 175°C), peak pulse current specification (5.3A vs. 5.5A for STMicroelectronics), and RoHS compliance documentation. These differences do not affect substitutability for standard applications.

Q: Is the DO-214AA package identical to SMB?

A: Yes. DO-214AA and SMB refer to the same surface mount package. Both designations are used interchangeably in the industry and describe the same physical form factor.

Q: Can I use SMBJ70CA-TP in place of SMBJ70CA-M3/5B?

A: Yes. The SMBJ70CA-TP (Micro Commercial Co) is a direct electrical equivalent with identical voltage and current ratings. The -TP suffix indicates Cut Tape & Digi-Reel packaging rather than standard Tape & Reel, but this does not affect electrical compatibility or performance.

Q: Does the higher peak pulse current of SMBJ70CA-TR (5.5A) provide an advantage?

A: The SMBJ70CA-TR specifies 5.5A peak pulse current compared to 5.3A for the baseline SMBJ70CA-M3/5B. This represents a 3.8% increase in transient current handling capability. For applications operating near the 5.3A limit, the STMicroelectronics variant provides additional margin.

Q: Are all substitutes ROHS3 compliant?

A: Vishay, Diodes Incorporated, and Micro Commercial Co variants explicitly state ROHS3 compliance. The Semtech SMBJ70CA does not specify RoHS status in available documentation. For applications requiring certified RoHS compliance, select from Vishay, Diodes Incorporated, or Micro Commercial Co sources.

Q: What is the significance of the MSL rating?

A: All SMBJ70CA variants carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. These components can be stored indefinitely without desiccant packaging or special humidity controls, simplifying inventory management and supply chain handling.