SMBJ12A-13 Equivalent & Substitute Parts

Part Overview

The SMBJ12A-13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in the DO-214AA (SMB) surface mount package. This component provides 12V reverse standoff voltage with 19.9V maximum clamping voltage and 30.2A peak pulse current capability, designed for general-purpose transient voltage suppression applications. The original part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	12V
Voltage - Breakdown (Min)	13.3V
Voltage - Clamping (Max) @ Ipp	19.9V
Current - Peak Pulse (10/1000µs)	30.2A
Power - Peak Pulse	600W
Type	Zener
Unidirectional Channels	1
Mounting Type	Surface Mount
Package / Case	DO-214AA, SMB
Operating Temperature	-55°C ~ 150°C (TJ)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: reverse standoff voltage (12V), breakdown voltage minimum (13.3V), clamping voltage maximum (19.9V), peak pulse current (30.2A or higher), peak pulse power (600W), unidirectional channel configuration (1), and surface mount package type (DO-214AA/SMB or compatible). Parts meeting all electrical specifications are grouped as direct substitutes regardless of manufacturer or packaging variant. Parts with minor deviations in peak pulse current (within ±5%) or clamping voltage (within ±0.5V) are included where package compatibility is maintained.

Parameter Comparison

Part Number	Manufacturer	Standoff (V)	Breakdown Min (V)	Clamp Max (V)	Peak Pulse (A)	Peak Power (W)	Package	Status	RoHS
SMBJ12A-13	Diodes Incorporated	12	13.3	19.9	30.2	600	DO-214AA, SMB	Discontinued	Non-compliant
SMBJ12A-13-F	Diodes Incorporated	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ12A-E3/52	Vishay General Semiconductor	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ12A-M3/5B	Vishay General Semiconductor	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ12A-TP	Micro Commercial Co	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ12A-TR	STMicroelectronics	12	13.3	19.9	31	600	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ12A	EVVO Semi	12	13.3	19.9	30.2	600	DO-214AC, SMA	Active	ROHS3 Compliant
SACB12	Littelfuse Inc.	12	13.3	19	25	500	DO-214AA, SMB	Active	ROHS3 Compliant

Engineering Selection Recommendations

SMBJ12A-13-F (Diodes Incorporated) is the primary direct substitute, offering identical electrical specifications with active product status and ROHS3 compliance. SMBJ12A-E3/52 and SMBJ12A-M3/5B (Vishay TransZorb® series) provide equivalent performance with established reliability in industrial applications and full RoHS compliance. SMBJ12A-TR (STMicroelectronics TRANSIL™) delivers equivalent specifications with marginally higher peak pulse current (31A) and maintains active status with RoHS certification.

SMBJ12A (EVVO Semi) meets all electrical requirements but uses DO-214AC (SMA) package instead of DO-214AA (SMB), requiring PCB layout verification for mechanical compatibility. SMBJ12A-TP (Micro Commercial Co) provides full electrical equivalence with extended operating temperature range to 175°C and active product status.

SACB12 (Littelfuse) operates within acceptable parameters with 0.9V lower clamping voltage (19V vs 19.9V) and 5A reduced peak pulse current (25A vs 30.2A), suitable for applications with reduced transient severity requirements.

Frequently Asked Questions (FAQ)

Q: Can SMBJ12A (EVVO Semi, SMA package) replace SMBJ12A-13 (SMB package)? A: Electrical specifications are identical, but the SMA package (DO-214AC) differs from the original SMB package (DO-214AA). Physical dimensions and PCB footprints are not interchangeable without layout modification. Verify footprint compatibility before substitution.

Q: What is the difference between SMBJ12A-13-F and SMBJ12A-E3/52? A: Both are electrically equivalent with identical voltage and current ratings. SMBJ12A-13-F is Diodes Incorporated packaging; SMBJ12A-E3/52 is Vishay's TransZorb® variant. Selection depends on supplier availability and procurement preference.

Q: Is SACB12 a suitable replacement? A: SACB12 meets the 12V standoff and 13.3V breakdown specifications but operates at 19V clamping (0.9V lower) with 25A peak pulse current (5A lower). It is suitable for applications where transient energy is within reduced specifications. Verify circuit requirements before substitution.

Q: What packaging options are available? A: Most substitutes use DO-214AA (SMB) surface mount package, identical to the original. EVVO Semi's SMBJ12A uses DO-214AC (SMA) package, which requires footprint verification. Tape & Reel (TR) and Cut Tape (CT) packaging variants are available from multiple manufacturers for production volumes.

Q: Are all substitute parts RoHS compliant? A: The original SMBJ12A-13 is RoHS non-compliant. All active substitute parts listed (SMBJ12A-13-F, SMBJ12A-E3/52, SMBJ12A-M3/5B, SMBJ12A-TP, SMBJ12A-TR, SACB12) are ROHS3 compliant, meeting current environmental regulations.

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