SMBJ12A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ12A-M3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 12V reverse standoff voltage class and is designed for general-purpose transient protection applications. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

SMBJ12A-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 840SMBJ12A-M3/52 Datasheet

Current PartRFQ

SMBJ12D-M3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 25716SMBJ12D-M3/H Datasheet

DirectRFQ

SMBJ12A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 20495SMBJ12A-E3/52 Datasheet

MFR RecommendedRFQ

SMBJ12A

EVVO SemiIn Stock: 6384SMBJ12A Datasheet

DirectRFQ

SMBJ12A

EVVO SemiIn Stock: 6384SMBJ12A Datasheet

DirectRFQ

SMBJ12A

EVVO SemiIn Stock: 6384SMBJ12A Datasheet

DirectRFQ

SMBJ12A-13-F

Diodes IncorporatedIn Stock: 35286SMBJ12A-13-F Datasheet

DirectRFQ

SMBJ12A-TP

Micro Commercial CoIn Stock: 3478SMBJ12A-TP Datasheet

DirectRFQ

SACB12

Littelfuse Inc.In Stock: 4130SACB12 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ12A-M3/52 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 12V
• Voltage - Clamping (Max) @ Ipp: 19.9V ±0.3V tolerance
• Current - Peak Pulse (10/1000µs): 30.2A ±0.4A tolerance
• Power - Peak Pulse: 600W
• Unidirectional Channels: 1
• Mounting Type: Surface Mount
• Package / Case: DO-214AA (SMB) or equivalent footprint
• Type: Zener
• RoHS Status: ROHS3 Compliant

Parts are grouped as direct substitutes when all critical electrical parameters fall within acceptable tolerances and the package footprint is compatible. Manufacturer variations and packaging formats (Tape & Reel vs. Cut Tape) do not affect electrical substitutability.

Parameter Comparison

Engineering Selection Recommendations

Full Electrical Equivalents (Identical Parameters): SMBJ12A-E3/52 (Vishay), SMBJ12A-13-F (Diodes Incorporated), and SMBJ12A-TP (Micro Commercial Co) are direct electrical equivalents with matching voltage clamping (19.9V), peak pulse current (30.2A), and power ratings (600W). All are ROHS3 compliant and Active status. Package compatibility is confirmed for DO-214AA (SMB) footprint.

Near-Equivalent with Minor Parameter Variance: SMBJ12D-M3/H (Vishay) exhibits a clamping voltage of 19.6V (0.3V lower) and peak pulse current of 30.6A (0.4A higher) within acceptable engineering tolerance for the 12V class. Same package and thermal range. ROHS3 compliant and Active status.

Electrical Equivalent with Package Consideration: SMBJ12A (EVVO Semi) matches all critical electrical parameters (19.9V clamping, 30.2A peak pulse) but uses DO-214AC (SMA) package instead of DO-214AA (SMB). PCB layout compatibility must be verified. Extended operating temperature range (-65°C ~ 150°C) provides additional thermal margin. ROHS3 compliant and Active status.

Reduced Performance Substitute: SACB12 (Littelfuse Inc.) operates at the same 12V reverse standoff voltage but with reduced peak pulse current (25A vs. 30.2A) and lower power rating (500W vs. 600W). Clamping voltage is 19V. This part is suitable only for applications with lower transient energy requirements. ROHS3 compliant and Active status.

Frequently Asked Questions (FAQ)

Q: Can SMBJ12A-E3/52 replace SMBJ12A-M3/52 directly? A: Yes. Both parts are manufactured by Vishay with identical electrical specifications (12V standoff, 19.9V clamping, 30.2A peak pulse, 600W power). The difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel). Electrical performance and PCB footprint are equivalent.

Q: What is the difference between SMBJ12D-M3/H and SMBJ12A-M3/52? A: SMBJ12D-M3/H has a slightly lower clamping voltage (19.6V vs. 19.9V) and marginally higher peak pulse current (30.6A vs. 30.2A). Both are within the 12V class tolerance band. Packaging and thermal range are identical. Selection depends on application-specific clamping voltage requirements.

Q: Why does SMBJ12A from EVVO Semi use a different package (SMA vs. SMB)? A: EVVO Semi's SMBJ12A uses DO-214AC (SMA) package instead of DO-214AA (SMB). While electrical parameters are identical, the physical footprint differs. PCB layout compatibility must be confirmed before substitution. The SMA package is smaller than SMB.

Q: Is SACB12 a suitable replacement for SMBJ12A-M3/52? A: SACB12 is a reduced-performance substitute. It maintains the 12V reverse standoff voltage and 19V clamping voltage but has lower peak pulse current (25A vs. 30.2A) and power rating (500W vs. 600W). Use only in applications with lower transient energy specifications.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant and carry Active product status, meeting current environmental and regulatory requirements.

Q: Does operating temperature range affect substitutability? A: Operating temperature range does not affect electrical substitutability for transient suppression function. SMBJ12A-TP extends to 175°C (vs. 150°C standard), providing additional thermal margin in high-temperature environments. SMBJ12A from EVVO Semi extends to -65°C, providing lower temperature operation capability.

Q: What is the significance of the base product number SMBJ12? A: SMBJ12 is the base designation for the 12V class TVS diode series. Suffixes (A, D, E3, TP, etc.) indicate manufacturer-specific variants, packaging formats, and tape specifications. All variants within the SMBJ12 family share the same 12V reverse standoff voltage classification.