SMBJ24AHE3/52 Transient Voltage Suppressor Diode – Equivalent & Substitute Parts

Part Overview

The SMBJ24AHE3/52 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AA (SMB) package. This part is classified as discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement.

The device provides transient voltage suppression with a 24V reverse standoff voltage and 38.9V maximum clamping voltage, suitable for general-purpose overvoltage protection in electronic circuits. The part carries automotive-grade qualification (AEC-Q101) and operates across the temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	24	V
Voltage - Breakdown (Min)	26.7	V
Voltage - Clamping (Max) @ Ipp	38.9	V
Current - Peak Pulse (10/1000µs)	15.4	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ24AHE3/52 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 24V
Voltage - Breakdown (Min): 26.7V
Voltage - Clamping (Max) @ Ipp: 38.9V
Current - Peak Pulse (10/1000µs): 15.4A (±0.1A tolerance acceptable)
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must maintain identical electrical performance within the specified voltage and current parameters. Package compatibility is mandatory for direct board-level substitution. All listed substitutes meet these criteria and are available in active or equivalent product status.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Package	Product Status
SMBJ24AHE3/52	Vishay	24	38.9	15.4	600	-55 to 150	DO-214AA, SMB	Discontinued
SMBJ24A-E3/52	Vishay	24	38.9	15.4	600	-55 to 150	DO-214AA, SMB	Active
SMBJ24A-M3/5B	Vishay	24	38.9	15.4	600	-55 to 150	DO-214AA, SMB	Active
SMBJ24AHE3_A/H	Vishay	24	38.9	15.4	600	-55 to 150	DO-214AA, SMB	Obsolete
1SMB24A TR13 PBFREE	Central Semiconductor Corp	24	38.9	15.4	600	-65 to 150	DO-214AA, SMB	Active
SMBJ24A	MDD	24	38.9	15.5	600	-50 to 150	DO-214AA, SMB	Active
SMBJ24A-13-F	Diodes Incorporated	24	38.9	15.4	600	-55 to 150	DO-214AA, SMB	Active
SMBJ24A-TP	Micro Commercial Co	24	38.9	15.4	600	-55 to 175	DO-214AA, SMB	Active
SMBJ24AE3/TR13	Microchip Technology	24	38.9	15.4	600	-65 to 150	DO-214AA, SMB	Active

Engineering Selection Recommendations

Primary Recommendation: SMBJ24A-E3/52 (Vishay)

This part is the direct active equivalent from the original manufacturer. It maintains identical electrical specifications and package configuration as the discontinued SMBJ24AHE3/52. Product status is active with substantial inventory availability (3734 pcs), ensuring long-term procurement viability. RoHS3 compliance and MSL 1 rating match the original specification.

Secondary Recommendations:

SMBJ24A-13-F (Diodes Incorporated) and SMBJ24A-TP (Micro Commercial Co) are functionally equivalent alternatives from established manufacturers. Both maintain the critical electrical parameters and DO-214AA package format. SMBJ24A-TP offers an extended operating temperature range to 175°C, providing additional thermal margin for high-temperature applications.

1SMB24A TR13 PBFREE (Central Semiconductor Corp) and SMBJ24AE3/TR13 (Microchip Technology) extend the lower operating temperature limit to -65°C, suitable for applications requiring enhanced cold-temperature performance.

SMBJ24A (MDD) is available in high volume (41100 pcs) with active product status. Peak pulse current specification is 15.5A, within acceptable tolerance of the 15.4A original specification.

Avoid: SMBJ24AHE3_A/H is marked as obsolete and should not be selected for new designs despite electrical equivalence.

Frequently Asked Questions (FAQ)

Q: Can SMBJ24A-E3/52 be used as a direct replacement for SMBJ24AHE3/52?

A: Yes. SMBJ24A-E3/52 is electrically and mechanically identical to the discontinued SMBJ24AHE3/52. Both are manufactured by Vishay with matching voltage ratings (24V standoff, 38.9V clamping), current ratings (15.4A peak pulse), and DO-214AA package specifications. The primary difference is product status: SMBJ24AHE3/52 is discontinued while SMBJ24A-E3/52 is active.

Q: Are there differences between Vishay SMBJ24A variants (E3/52, M3/5B, etc.)?

A: The electrical specifications are identical across Vishay SMBJ24A variants. Differences exist only in packaging format: E3/52 is supplied in Cut Tape (CT), while M3/5B is supplied in Tape & Reel (TR). Selection depends on your procurement and assembly requirements. Both are active products.

Q: Can I substitute a part with a higher peak pulse current rating?

A: Yes, provided all other electrical parameters match. SMBJ24A (MDD) has a peak pulse current of 15.5A compared to the original 15.4A. This 0.1A difference is within acceptable tolerance and does not compromise circuit protection. Higher current ratings provide additional safety margin.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range does not prevent substitution if your application operates within the substitute part's specified range. If your circuit operates at -55°C to 150°C, any substitute rated for this range or wider is acceptable. Parts with extended ranges (e.g., -65°C to 150°C or -55°C to 175°C) provide additional margin but are not required unless your application demands it.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed meet RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity requirements, matching the original SMBJ24AHE3/52 specification.

Q: What is the difference between DO-214AA and SMB package designations?

A: DO-214AA and SMB refer to the same physical package format. Both designations describe the surface mount diode package used for the SMBJ24 series. No functional or mechanical difference exists between parts labeled with either designation.

Q: Can I use SMBJ24AHE3_A/H as a substitute?

A: SMBJ24AHE3_A/H is electrically equivalent but marked as obsolete. For new designs and ongoing procurement, select active-status alternatives such as SMBJ24A-E3/52, SMBJ24A-13-F, or SMBJ24A-TP to ensure long-term availability and manufacturer support.

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