SMB8J12C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMB8J12C-E3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface mount component operates in the DO-214AA (SMB) package and is designed for general-purpose transient voltage suppression applications. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SMB8J12C-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1020SMB8J12C-E3/5B Datasheet

Current PartRFQ

SMB8J12CA-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 882SMB8J12CA-E3/5B Datasheet

DirectRFQ

SMBJ12CA

EVVO SemiIn Stock: 112062SMBJ12CA Datasheet

MFR RecommendedRFQ

SMBJ12CA

EVVO SemiIn Stock: 112062SMBJ12CA Datasheet

MFR RecommendedRFQ

SMBJ12CA

EVVO SemiIn Stock: 112062SMBJ12CA Datasheet

MFR RecommendedRFQ

SMBJ12CA-TR

STMicroelectronicsIn Stock: 15220SMBJ12CA-TR Datasheet

MFR RecommendedRFQ

SMBJ12CAE3/TR13

Microchip TechnologyIn Stock: 3880SMBJ12CAE3/TR13 Datasheet

MFR RecommendedRFQ

SMBJ12CE3/TR13

Microchip TechnologyIn Stock: 1042SMBJ12CE3/TR13 Datasheet

MFR RecommendedRFQ

TV06B120JB-G

Comchip TechnologyIn Stock: 1110TV06B120JB-G Datasheet

MFR RecommendedRFQ

TV06B120JB-HF

Comchip TechnologyIn Stock: 848TV06B120JB-HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMB8J12C-E3/5B is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Voltage - Reverse Standoff (Typ): 12V
• Voltage - Breakdown (Min): 13.3V
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Bidirectional Channels: 1
• Type: Zener

Acceptable Variation Parameters:

• Voltage - Clamping (Max) @ Ipp: 19.9V to 22V (within application tolerance)
• Current - Peak Pulse (10/1000µs): 27.3A to 40.2A (application dependent)
• Power - Peak Pulse: 600W to 800W (application dependent)
• Operating Temperature: -55°C to -65°C minimum; 150°C maximum

Substitute parts must maintain identical reverse standoff voltage (12V), breakdown voltage (13.3V minimum), and package configuration (DO-214AA SMB). Clamping voltage, peak pulse current, and power dissipation may vary within the specified ranges based on application requirements.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain compliance with ROHS3 and REACH requirements, matching the original SMB8J12C-E3/5B specifications. Selection among substitutes depends on application-specific requirements:

Primary Substitute (Closest Electrical Match): SMB8J12CA-E3/5B (Vishay) maintains the original manufacturer lineage with identical reverse standoff voltage (12V), breakdown voltage (13.3V), and clamping voltage (22V). This part is active and available in 830 pieces.

Alternative Substitutes with Lower Clamping Voltage (19.9V): SMBJ12CA-TR (STMicroelectronics), SMBJ12CAE3/TR13 (Microchip), TV06B120JB-G (Comchip), and TV06B120JB-HF (Comchip) all feature 19.9V clamping voltage with peak pulse currents between 27.3A and 31A. These parts are suitable for applications where the lower clamping voltage is acceptable.

Extended Temperature Range Option: SMBJ12CA (EVVO Semi), SMBJ12CAE3/TR13 (Microchip), and SMBJ12CE3/TR13 (Microchip) support operating temperatures down to -65°C, providing enhanced low-temperature performance compared to the original -55°C minimum.

Identical Clamping Voltage Match: SMBJ12CE3/TR13 (Microchip) maintains the 22V clamping voltage specification of the original part while offering active product status and extended temperature range.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with 19.9V clamping voltage instead of 22V? A: Substitution is application-dependent. The 19.9V clamping voltage is lower than the original 22V specification. Use only if your circuit design tolerates this reduced clamping threshold. Verify that transient voltage suppression performance remains adequate for your specific application.

Q: Are all substitute parts compatible with the original DO-214AA SMB package footprint? A: Yes. All listed substitutes use the DO-214AA (SMB) package and are surface mount components with identical mechanical compatibility.

Q: What is the difference between the Vishay SMB8J12CA-E3/5B and the Microchip SMBJ12CAE3/TR13? A: Both maintain 12V reverse standoff and 13.3V breakdown voltages. The Vishay part has 22V clamping voltage and 40.2A peak pulse current. The Microchip part has 19.9V clamping voltage and 30.2A peak pulse current. The Microchip part supports extended temperature range (-65°C to 150°C).

Q: Does the original part's obsolete status affect substitute selection? A: Yes. All listed substitutes have active product status, ensuring long-term availability and supply chain continuity. The original SMB8J12C-E3/5B is no longer manufactured.

Q: Are all substitutes RoHS3 compliant? A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the original part.

Q: Which substitute offers the best inventory availability? A: SMBJ12CA (EVVO Semi) has the highest inventory with 112,045 pieces available. SMBJ12CA-TR (STMicroelectronics) has 15,197 pieces. SMB8J12CA-E3/5B (Vishay) has 830 pieces.