P6SMBJ33CA Equivalent & Substitute Parts

Part Overview

The P6SMBJ33CA is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., housed in a DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 28.2V reverse standoff voltage and 600W peak pulse power rating. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	P6SMBJ33CA
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Package / Case	DO-214AA, SMB
Voltage - Reverse Standoff (Typ)	28.2V
Voltage - Breakdown (Min)	31.4V
Voltage - Clamping (Max) @ Ipp	45.7V
Current - Peak Pulse (10/1000µs)	13.3A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Bidirectional Channels	1
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the P6SMBJ33CA is determined by strict electrical and mechanical compatibility criteria:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 28.2V
Voltage - Breakdown (Min): 31.4V
Voltage - Clamping (Max) @ Ipp: 45.7V
Package / Case: DO-214AA or SMB
Mounting Type: Surface Mount
Bidirectional Channels: 1
Type: Zener

Allowable Variations:

Current - Peak Pulse: 13.1A to 21.9A (higher values provide enhanced transient protection)
Power - Peak Pulse: 600W to 1000W (higher values provide enhanced transient protection)
Operating Temperature Range: May extend beyond the original -55°C ~ 150°C specification
Product Status: Active parts are preferred over obsolete parts
Certifications: AEC-Q101 automotive qualification is an optional enhancement

Substitute parts meeting these criteria maintain functional equivalence for the P6SMBJ33CA in transient voltage suppression applications.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package / Case	Product Status
P6SMBJ33CA	Littelfuse Inc.	28.2V	31.4V	45.7V	13.3A	600W	-55°C ~ 150°C	DO-214AA, SMB	Obsolete
TPSMB33CA	Littelfuse Inc.	28.2V	31.4V	45.7V	13.3A	600W	-65°C ~ 175°C	DO-214AA, SMB	Active
P6SMB33CA	Eaton - Electronics Division	28.2V	31.4V	45.7V	13.3A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SZP6SMB33CAT3G	Littelfuse	28.2V	31.4V	45.7V	13.2A	600W	-65°C ~ 150°C	DO-214AA, SMB	Active
SMBJP6KE33CA-TP	Micro Commercial Co	28.2V	31.4V	45.7V	13.3A	600W	-55°C ~ 175°C	DO-214AA, SMB	Active
1KSMB33CA	Taiwan Semiconductor Corporation	28.2V	31.4V	45.7V	21.9A	1000W	-55°C ~ 175°C	DO-214AA, SMB	Active
1KSMB33CAH	Taiwan Semiconductor Corporation	28.2V	31.4V	45.7V	21.9A	1000W	-55°C ~ 175°C	DO-214AA, SMB	Active
P6SMB33CA-E3/52	Vishay General Semiconductor - Diodes Division	28.2V	31.4V	45.7V	13.1A	600W	-65°C ~ 150°C	DO-214AA, SMB	Active
P6SMB33CA-E3/5B	Vishay General Semiconductor - Diodes Division	28.2V	31.4V	45.7V	13.1A	600W	-65°C ~ 150°C	DO-214AA, SMB	Active

Engineering Selection Recommendations

All listed substitute parts maintain electrical equivalence to the P6SMBJ33CA across the critical voltage and clamping parameters. Selection should prioritize active product status over the obsolete original part.

Primary Substitutes (Direct Equivalents):

TPSMB33CA (Littelfuse Inc.) — Active status, extended temperature range to -65°C ~ 175°C, identical electrical specifications
P6SMB33CA (Eaton - Electronics Division) — Active status, identical electrical and temperature specifications
SMBJP6KE33CA-TP (Micro Commercial Co) — Active status, extended temperature range to -55°C ~ 175°C

Enhanced Substitutes (Higher Power Rating):

1KSMB33CA (Taiwan Semiconductor Corporation) — Active status, 1000W peak pulse power (vs. 600W), 21.9A peak pulse current (vs. 13.3A), extended temperature range
1KSMB33CAH (Taiwan Semiconductor Corporation) — Active status with AEC-Q101 automotive qualification, 1000W peak pulse power, 21.9A peak pulse current, extended temperature range

Alternative Substitutes (Vishay TransZorb® Series):

P6SMB33CA-E3/52 (Vishay General Semiconductor - Diodes Division) — Active status, extended temperature range to -65°C ~ 150°C, 13.1A peak pulse current
P6SMB33CA-E3/5B (Vishay General Semiconductor - Diodes Division) — Active status, extended temperature range to -65°C ~ 150°C, 13.1A peak pulse current

Automotive-Qualified Option:

SZP6SMB33CAT3G (Littelfuse) — Active status with AEC-Q101 automotive qualification, extended lower temperature limit to -65°C, 13.2A peak pulse current

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher peak pulse current (21.9A vs. 13.3A)? A: Yes. The 1KSMB33CA and 1KSMB33CAH parts provide higher peak pulse current and 1000W power rating while maintaining identical voltage parameters. These parts offer enhanced transient suppression capability and are direct functional upgrades.

Q: What is the difference between the Littelfuse TPSMB33CA and the original P6SMBJ33CA? A: The TPSMB33CA is the active production equivalent with identical electrical specifications. The primary difference is product status (active vs. obsolete) and an extended operating temperature range (-65°C ~ 175°C vs. -55°C ~ 150°C).

Q: Are the Vishay P6SMB33CA-E3/52 and P6SMB33CA-E3/5B parts interchangeable? A: Yes. Both parts are Vishay TransZorb® series components with identical electrical specifications and operating temperature ranges. The suffix designations reflect packaging or reel configuration differences only.

Q: Do I need AEC-Q101 automotive qualification for my application? A: AEC-Q101 qualification is required only for automotive applications. The 1KSMB33CAH and SZP6SMB33CAT3G parts carry this certification. Non-automotive applications do not require this qualification.

Q: Can I substitute the P6SMBJ33CA with a part rated for -55°C ~ 150°C if my application requires -65°C operation? A: No. If your application requires operation at -65°C, select only parts with operating temperature ranges that include this lower limit: TPSMB33CA, SZP6SMB33CAT3G, SMBJP6KE33CA-TP, 1KSMB33CA, 1KSMB33CAH, P6SMB33CA-E3/52, or P6SMB33CA-E3/5B.

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 are used interchangeably in the industry for surface mount diodes in this form factor. All listed substitute parts use this identical package.

Q: Is RoHS3 compliance maintained across all substitute parts? A: Yes. All substitute parts listed maintain ROHS3 compliance, ensuring compatibility with RoHS-regulated supply chains and applications.

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