P6SMB33A-M3/52 Equivalent & Substitute Parts

Part Overview

The P6SMB33A-M3/52 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 28.2V reverse standoff voltage class and provides 45.7V maximum clamping voltage with 13.1A peak pulse current capability. The device is classified as Active product status and is fully RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	28.2	V
Voltage - Breakdown (Min)	31.4	V
Voltage - Clamping (Max) @ Ipp	45.7	V
Current - Peak Pulse (10/1000µs)	13.1	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65°C to 150°C	TJ
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the P6SMB33A-M3/52 are classified based on strict electrical parameter alignment within the following criteria:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 28.2V ± tolerance
Voltage - Breakdown (Min): 31.4V minimum
Voltage - Clamping (Max) @ Ipp: 45.7V maximum
Current - Peak Pulse (10/1000µs): ≥ 13.1A
Power - Peak Pulse: ≥ 600W
Package / Case: DO-214AA, SMB (surface mount)
Mounting Type: Surface Mount
Operating Temperature: -55°C to 150°C minimum range
RoHS Compliance: ROHS3 or equivalent

Packaging Variants: Substitutes may differ in packaging format (Tape & Reel, Cut Tape, Tape & Box) without affecting electrical performance.

Manufacturer Variants: Multiple manufacturers produce equivalent devices within the same electrical specification class, allowing cross-manufacturer substitution when all electrical parameters are met.

Parameter Comparison

Part Number	Manufacturer	Vwm (Typ) V	Vbr (Min) V	Vc (Max) V	Ipp (10/1000µs) A	Power W	Temp Range °C	Package	RoHS
P6SMB33A-M3/52	Vishay	28.2	31.4	45.7	13.1	600	-65 to 150	DO-214AA SMB	ROHS3
P6SMB33A-E3/52	Vishay	28.2	31.4	45.7	13.1	600	-65 to 150	DO-214AA SMB	ROHS3
1KSMB33A	Taiwan Semiconductor	28.2	31.4	45.7	21.9	1000	-55 to 175	DO-214AA SMB	ROHS3
P6SMB33A	Eaton	28.2	31.4	45.7	13.3	600	-55 to 150	DO-214AA SMB	RoHS
SM6T33A	STMicroelectronics	28.2	31.4	59	68 (8/20µs)	600	-55 to 150	DO-214AA SMB	ROHS3
SM6T33AY	STMicroelectronics	28.2	31.4	59	68 (8/20µs)	600	-55 to 150	DO-214AA SMB	ROHS3
SMBJ33A	Good-Ark Semiconductor	33	36.7	53.3	11.3	600	-55 to 150	DO-214AA SMB	ROHS3
SMBJP6KE33A-TP	Micro Commercial Co	28.2	31.4	45.7	13.3	600	-55 to 175	DO-214AA SMB	ROHS3
SZP6SMB33AT3G	Littelfuse	28.2	31.4	45.7	13.2	600	-65 to 150	DO-214AA SMB	ROHS3

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Performance):

P6SMB33A-E3/52 (Vishay): Identical specifications to the main part; differs only in packaging format (Tape & Reel vs. Tape & Box). Suitable for direct substitution in all applications.
SZP6SMB33AT3G (Littelfuse): Meets all electrical parameters with matching temperature range (-65°C to 150°C). AEC-Q101 automotive qualification available. Suitable for direct substitution.

Enhanced Performance Substitutes (Higher Current/Power Rating):

1KSMB33A (Taiwan Semiconductor): Provides 21.9A peak pulse current and 1000W power rating versus 13.1A and 600W of the main part. Extended operating temperature range (-55°C to 175°C). Suitable where higher transient energy absorption is required.
SMBJP6KE33A-TP (Micro Commercial Co): Matches clamping voltage and current specifications with extended temperature range (-55°C to 175°C). ROHS3 compliant.

Alternative Voltage Class (Parameter Deviation):

SM6T33A and SM6T33AY (STMicroelectronics): Higher clamping voltage (59V vs. 45.7V) and significantly higher peak pulse current (68A vs. 13.1A). Suitable only where higher voltage suppression is acceptable in the circuit design.
SMBJ33A (Good-Ark Semiconductor): Different voltage class (33V standoff vs. 28.2V). Parameter deviation requires circuit-level evaluation before substitution.

All substitute parts maintain DO-214AA SMB surface mount package compatibility and RoHS3 compliance status.

Frequently Asked Questions (FAQ)

Q: Can P6SMB33A-E3/52 replace P6SMB33A-M3/52 directly? A: Yes. Both parts are manufactured by Vishay with identical electrical specifications (28.2V standoff, 45.7V clamping, 13.1A peak pulse). The only difference is packaging format (Tape & Reel vs. Tape & Box), which does not affect electrical performance or PCB assembly compatibility.

Q: What is the difference between packaging formats (TB, TR, CT)? A: TB (Tape & Box), TR (Tape & Reel), and CT (Cut Tape) refer to supply and delivery formats only. All formats contain the same component in DO-214AA SMB package. Selection depends on procurement volume and assembly line requirements, not electrical performance.

Q: Can 1KSMB33A be used as a drop-in replacement? A: 1KSMB33A is electrically compatible with identical voltage specifications (28.2V standoff, 45.7V clamping). However, it provides higher peak pulse current (21.9A vs. 13.1A) and power rating (1000W vs. 600W). It is suitable for direct substitution and offers enhanced transient protection capability.

Q: Why do SM6T33A and SM6T33AY have different clamping voltages? A: SM6T33A and SM6T33AY are from the STMicroelectronics TRANSIL™ series with 59V clamping voltage, compared to 45.7V for the P6SMB33A-M3/52. These parts operate in a different voltage suppression class and require circuit-level verification before substitution.

Q: Are all substitute parts RoHS3 compliant? A: All listed substitute parts are RoHS3 compliant or RoHS compliant, meeting environmental and hazardous substance restrictions. Eaton P6SMB33A carries RoHS compliance status (not explicitly ROHS3). Verify specific compliance requirements for your application.

Q: What is the significance of AEC-Q101 qualification? A: AEC-Q101 qualification (present on SM6T33AY and SZP6SMB33AT3G) indicates automotive-grade reliability testing. These parts are suitable for automotive and high-reliability applications. Non-qualified parts are suitable for general-purpose and commercial applications.

Q: Can SMBJ33A replace P6SMB33A-M3/52? A: SMBJ33A operates in a different voltage class (33V standoff vs. 28.2V) with higher clamping voltage (53.3V vs. 45.7V). Substitution requires circuit-level analysis to confirm voltage suppression requirements are met.

Q: What is the Moisture Sensitivity Level (MSL)? A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts carry MSL 1 rating.

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