SMBJ24A-13 Equivalent & Substitute Parts

Part Overview

The SMBJ24A-13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in the SMB (DO-214AA) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 24V reverse standoff voltage and 38.9V maximum clamping voltage. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the SMBJ24A-13 is determined by strict equivalence across the following electrical and mechanical parameters:

Reverse standoff voltage: 24V (nominal)
Breakdown voltage minimum: 26.7V
Clamping voltage maximum at Ipp: 38.9V
Peak pulse current rating: 15.4A to 16A
Peak pulse power: 600W
Package type: DO-214AA / SMB surface mount
Unidirectional configuration: single channel Zener type
Operating temperature range: minimum -55°C, maximum 150°C or higher

Substitute parts are grouped into three categories based on their relationship to the original part: direct equivalents (identical electrical and mechanical specifications), manufacturer variants (same base part number with different packaging or compliance status), and manufacturer-recommended alternatives (different part numbers meeting all electrical and mechanical requirements).

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage (V)	Breakdown Voltage Min (V)	Clamping Voltage Max (V)	Peak Pulse Current (A)	Package	Operating Temp (°C)	Product Status	RoHS Status
SMBJ24A-13	Diodes Incorporated	24	26.7	38.9	15.4	DO-214AA, SMB	-55 to 150	Discontinued	Non-compliant
SMBJ24A-13-F	Diodes Incorporated	24	26.7	38.9	15.4	DO-214AA, SMB	-55 to 150	Active	ROHS3 Compliant
SMBJ24A	MDD	24	26.7	38.9	15.5	DO-214AA, SMB	-50 to 150	Active	ROHS3 Compliant
SMBJ24A-TP	Micro Commercial Co	24	26.7	38.9	15.4	DO-214AA, SMB	-55 to 175	Active	ROHS3 Compliant
PTVS24VP1UP,115	Nexperia USA Inc.	24	26.7	38.9	15.4	SOD-128	-55 to 150	Active	ROHS3 Compliant
SMBJ24A-TR	STMicroelectronics	24	26.7	38.9	16	DO-214AA, SMB	-55 to 150	Active	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring direct pin-for-pin and footprint compatibility with the SMBJ24A-13, the SMBJ24A-13-F from Diodes Incorporated is the primary equivalent. This part maintains identical electrical specifications and SMB package geometry while offering active product status and ROHS3 compliance, addressing the discontinuation of the original part.

The SMBJ24A from MDD provides an alternative with marginally higher peak pulse current (15.5A versus 15.4A) and a reduced lower operating temperature limit (-50°C versus -55°C). This part is suitable for applications where the lower temperature bound is not critical.

The SMBJ24A-TP from Micro Commercial Co offers extended upper operating temperature capability (-55°C to 175°C) while maintaining SMB package compatibility and identical electrical ratings. This variant is appropriate for high-temperature environments.

The SMBJ24A-TR from STMicroelectronics provides SMB package compatibility with a marginally higher peak pulse current specification (16A) and active product status. This part is qualified under the TRANSIL™ series designation.

The PTVS24VP1UP,115 from Nexperia USA Inc. is a manufacturer-recommended alternative with identical electrical specifications but employs the SOD-128 package instead of SMB. This part includes AEC-Q101 automotive qualification and is suitable only for applications where package footprint change is acceptable.

Frequently Asked Questions (FAQ)

Q: Can SMBJ24A-13-F be used as a direct replacement for SMBJ24A-13?

A: Yes. The SMBJ24A-13-F maintains identical electrical parameters (24V standoff, 26.7V breakdown minimum, 38.9V clamping maximum, 15.4A peak pulse current) and SMB package geometry. The primary difference is active product status and ROHS3 compliance versus the discontinued non-compliant original.

Q: What is the difference between SMB and SOD-128 packages?

A: SMB (DO-214AA) and SOD-128 are distinct surface mount package types with different footprints and pin configurations. The PTVS24VP1UP,115 uses SOD-128 packaging and cannot be used as a direct footprint replacement for SMB-packaged parts without PCB redesign.

Q: Are there temperature range differences between substitutes?

A: Yes. The SMBJ24A-TP extends the upper operating temperature to 175°C (versus 150°C for most alternatives). The SMBJ24A from MDD has a lower minimum operating temperature of -50°C instead of -55°C. Select based on your application's thermal requirements.

Q: Do all substitutes meet RoHS compliance?

A: The original SMBJ24A-13 is RoHS non-compliant. All listed substitutes (SMBJ24A-13-F, SMBJ24A, SMBJ24A-TP, SMBJ24A-TR, and PTVS24VP1UP,115) are ROHS3 compliant, meeting current regulatory requirements.

Q: What is the significance of peak pulse current variations (15.4A, 15.5A, 16A)?

A: These minor variations fall within the functional equivalence range for this component category. All values exceed the 15.4A specification of the original part, providing equal or improved transient suppression capability.

Q: Is the SMBJ24A-TR from STMicroelectronics a suitable substitute?

A: Yes. The SMBJ24A-TR maintains SMB package compatibility, identical voltage specifications, and a marginally higher peak pulse current (16A). It is actively produced and ROHS3 compliant.

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