SMBJ54A-13 Equivalent & Substitute Parts

Part Overview

The SMBJ54A-13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a 54V reverse standoff voltage and provides 87.1V maximum clamping voltage at 6.9A peak pulse current in a DO-214AA (SMB) package. The SMBJ54A-13 is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	54	V
Voltage - Breakdown (Min)	60	V
Voltage - Clamping (Max) @ Ipp	87.1	V
Current - Peak Pulse (10/1000µs)	6.9	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ54A-13 are classified based on strict electrical and mechanical parameter matching:

Direct Electrical Equivalents (Same Voltage & Current Ratings): Parts maintaining identical reverse standoff voltage (54V), breakdown voltage (60V minimum), clamping voltage (87.1V maximum), and peak pulse current (6.9A) specifications qualify as direct substitutes. These parts preserve circuit protection performance without design modification.

Key Parameters for Substitution Eligibility:

Voltage - Reverse Standoff (Typ): 54V
Voltage - Clamping (Max) @ Ipp: 87.1V
Current - Peak Pulse (10/1000µs): 6.9A
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Unidirectional Channels: 1

Alternative Voltage Ratings (Functional Alternatives): Parts with different voltage ratings (51V standoff, 82.4V clamping, 7.3A peak pulse) are classified as functional alternatives. These provide comparable overvoltage protection in the same package but operate at different voltage thresholds and are suitable only when circuit design permits voltage rating variation.

Parameter Comparison

Parameter	SMBJ54A-13	SMBJ54A-13-F	SMBJ54A (MDD)	SMBJ54A-TP	SMBJ51CA-TP	PTVS51VP1UP,115
Manufacturer	Diodes Inc.	Diodes Inc.	MDD	Micro Commercial Co	Micro Commercial Co	NXP USA Inc.
Voltage - Reverse Standoff (Typ)	54V	54V	54V	54V	51V	51V
Voltage - Breakdown (Min)	60V	60V	60V	60V	56.7V	56.7V
Voltage - Clamping (Max) @ Ipp	87.1V	87.1V	87.1V	87.1V	82.4V	82.4V
Current - Peak Pulse (10/1000µs)	6.9A	6.9A	6.9A	6.9A	7.3A	7.3A
Power - Peak Pulse	600W	600W	600W	600W	600W	600W
Operating Temperature	-55 to 150°C	-55 to 150°C	-50 to 150°C	-55 to 175°C	-55 to 175°C	-55 to 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	SOD-128
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Unidirectional Channels	1	1	1	1	1	1
Product Status	Discontinued	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance):

SMBJ54A-13-F, SMBJ54A (MDD), and SMBJ54A-TP are direct electrical equivalents with matching 54V standoff, 87.1V clamping, and 6.9A peak pulse specifications. All three are in active product status with ROHS3 compliance, addressing the discontinued status of the original SMBJ54A-13. SMBJ54A-13-F maintains Diodes Incorporated manufacturing continuity. SMBJ54A-TP offers extended operating temperature range (-55 to 175°C) compared to the original specification (-55 to 150°C).

Functional Alternatives (Different Voltage Ratings):

SMBJ51CA-TP and PTVS51VP1UP,115 operate at lower voltage thresholds (51V standoff, 82.4V clamping, 7.3A peak pulse). These are suitable only when circuit design permits operation at reduced voltage ratings. SMBJ51CA-TP maintains DO-214AA (SMB) package compatibility. PTVS51VP1UP,115 uses SOD-128 package, requiring PCB layout modification and is qualified to AEC-Q101 automotive standard.

Compliance Considerations:

The original SMBJ54A-13 is RoHS non-compliant. All active substitutes (SMBJ54A-13-F, SMBJ54A, SMBJ54A-TP, SMBJ51CA-TP) are ROHS3 compliant, meeting current environmental regulations for new production.

Frequently Asked Questions (FAQ)

Q: Can SMBJ54A-13-F be used as a direct replacement for SMBJ54A-13?

A: Yes. SMBJ54A-13-F is electrically and mechanically identical, with matching 54V standoff voltage, 87.1V clamping voltage, 6.9A peak pulse current, and DO-214AA (SMB) package. The primary difference is packaging format (Tape & Reel vs. bulk) and active product status. ROHS3 compliance is an additional benefit for new designs.

Q: What is the difference between SMBJ54A-TP and SMBJ54A-13-F?

A: Both maintain identical electrical specifications (54V standoff, 87.1V clamping, 6.9A peak pulse). SMBJ54A-TP is manufactured by Micro Commercial Co and offers extended operating temperature range (-55 to 175°C) versus -55 to 150°C for SMBJ54A-13-F. Selection depends on thermal environment requirements.

Q: Can SMBJ51CA-TP replace SMBJ54A-13 in existing circuits?

A: SMBJ51CA-TP is not a direct replacement. It operates at lower voltage thresholds (51V standoff vs. 54V, 82.4V clamping vs. 87.1V). Substitution is only valid if circuit design analysis confirms that reduced voltage ratings provide adequate protection for the specific application. Package compatibility (DO-214AA, SMB) is maintained.

Q: Why is PTVS51VP1UP,115 listed as a substitute if it uses a different package?

A: PTVS51VP1UP,115 is classified as a functional alternative based on comparable electrical performance (51V standoff, 82.4V clamping, 7.3A peak pulse, 600W peak power). However, the SOD-128 package differs from DO-214AA (SMB), requiring PCB layout redesign. This part is suitable only for new designs where package change is acceptable. AEC-Q101 automotive qualification provides additional assurance for demanding applications.

Q: Are all substitute parts available in the same packaging format?

A: No. SMBJ54A-13-F, SMBJ54A (MDD), and SMBJ54A-TP are supplied in Tape & Reel (TR) format. SMBJ51CA-TP is also Tape & Reel. PTVS51VP1UP,115 is supplied in Bulk format. Verify packaging requirements for automated assembly processes before selection.

Q: What is the inventory status of substitute parts?

A: SMBJ54A-13-F has 15,300 units in stock. SMBJ54A (MDD) has 3,400 units. SMBJ54A-TP has 3,892 units. SMBJ51CA-TP has 2,870 units. PTVS51VP1UP,115 has 40,725 units. Inventory levels support production requirements for all direct and functional alternatives.

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