SMBJ33A-HRA Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMBJ33A-HRA is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This surface-mount component operates with a 33V reverse standoff voltage and provides 600W peak pulse power dissipation in a compact DO-214AA (SMB) package. The part is classified as Active with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the SMBJ33A product family across multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	33	V
Voltage - Breakdown (Min)	36.7	V
Voltage - Clamping (Max) @ Ipp	53.3	V
Current - Peak Pulse (10/1000µs)	11.3	A
Power - Peak Pulse	600	W
Type	Zener	-
Unidirectional Channels	1	-
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the SMBJ33A-HRA are qualified based on the following criteria:

Electrical Parameters (Must Match):

Voltage - Reverse Standoff: 33V
Voltage - Breakdown (Min): 36.7V
Voltage - Clamping (Max) @ Ipp: 53.3V
Current - Peak Pulse (10/1000µs): 11.3A
Power - Peak Pulse: 600W
Type: Zener, Unidirectional (1 channel)

Mechanical Parameters (Must Match):

Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount

Compliance Requirements (Must Match):

RoHS3 Compliant
MSL 1 (Unlimited)

All identified substitute parts meet these criteria across manufacturers including Good-Ark Semiconductor, Central Semiconductor Corp, Diodes Incorporated, Micro Commercial Co, and Vishay General Semiconductor.

Parameter Comparison

Part Number	Manufacturer	Vwm (V)	Vbr (Min) (V)	Vc (Max) @ Ipp (V)	Ipp (A)	Ppk (W)	Package	Temp Range (°C)	RoHS3
SMBJ33A-HRA	Littelfuse	33	36.7	53.3	11.3	600	DO-214AA (SMBJ)	-65 to 150	Yes
SMBJ33A	Good-Ark Semiconductor	33	36.7	53.3	11.3	600	DO-214AA (SMB)	-55 to 150	Yes
1SMB33A TR13 PBFREE	Central Semiconductor Corp	33	36.7	53.3	11.3	600	DO-214AA (SMB)	-65 to 150	Yes
SMBJ33A-13-F	Diodes Incorporated	33	36.7	53.3	11.3	600	DO-214AA (SMB)	-55 to 150	Yes
SMBJ33A-E3/52	Vishay General Semiconductor	33	36.7	53.3	11.3	600	DO-214AA (SMBJ)	-55 to 150	Yes
SMBJ33A-M3/52	Vishay General Semiconductor	33	36.7	53.3	11.3	600	DO-214AA (SMBJ)	-55 to 150	Yes
SMBJ33A-TP	Micro Commercial Co	33	36.7	53.3	11.3	600	DO-214AA (SMB)	-55 to 175	Yes

Engineering Selection Recommendations

All substitute parts listed maintain identical electrical performance specifications and mechanical compatibility with the SMBJ33A-HRA. Selection among these alternatives is determined by:

Availability and Lead Time: Inventory levels vary across manufacturers. Good-Ark Semiconductor SMBJ33A offers the highest stock (17,111 pcs), while Micro Commercial Co SMBJ33A-TP maintains the lowest inventory (1,394 pcs).

Operating Temperature Range: The SMBJ33A-HRA and 1SMB33A TR13 PBFREE support the extended lower temperature limit of -65°C. The SMBJ33A-TP from Micro Commercial Co extends the upper operating temperature to 175°C, compared to 150°C for other variants.

Packaging Configuration: All parts use DO-214AA (SMB) surface-mount packages. Packaging designations (SMBJ vs. SMB) and tape configurations (TR, CT, Digi-Reel) reflect supplier-specific handling but do not affect electrical or mechanical compatibility.

Compliance Status: All substitute parts maintain RoHS3 compliance, REACH unaffected status, and MSL 1 rating, ensuring regulatory and environmental compatibility across applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ33A-HRA be directly replaced with SMBJ33A from Good-Ark Semiconductor?

A: Yes. Both parts share identical electrical parameters (33V standoff, 53.3V clamping, 11.3A peak pulse, 600W power dissipation) and DO-214AA package specifications. The operating temperature range differs slightly (-55°C to 150°C vs. -65°C to 150°C), which does not affect substitution in standard applications.

Q: What is the difference between SMBJ33A-E3/52 and SMBJ33A-M3/52 from Vishay?

A: Both Vishay variants maintain identical electrical and mechanical specifications. The suffix designations (-E3/52 and -M3/52) reflect Vishay's internal packaging and tape configuration codes. Electrical performance and DO-214AA package compatibility are equivalent.

Q: Is 1SMB33A TR13 PBFREE compatible with SMBJ33A-HRA?

A: Yes. The Central Semiconductor part meets all electrical and mechanical requirements. The "PBFREE" designation indicates lead-free compliance, consistent with RoHS3 standards applied to all listed substitutes.

Q: Does the extended temperature range of SMBJ33A-TP (-55°C to 175°C) affect substitution suitability?

A: The extended upper temperature limit of 175°C provides additional thermal margin but does not compromise compatibility. This variant is suitable for applications requiring higher temperature operation. Standard applications operating within -55°C to 150°C ranges are unaffected.

Q: Are all substitute parts available in Tape & Reel (TR) packaging?

A: Most substitutes are supplied in Tape & Reel configuration. Good-Ark Semiconductor SMBJ33A and Vishay SMBJ33A-E3/52 are available in Cut Tape (CT) and Digi-Reel configurations. Verify packaging requirements with your procurement specification before ordering.

Q: What compliance certifications apply to all substitute parts?

A: All listed parts maintain RoHS3 compliance, REACH unaffected status, MSL 1 (unlimited moisture sensitivity), and identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

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