SZP6SMB47AT3G Equivalent & Substitute Parts

Part Overview

The SZP6SMB47AT3G is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in the SMB package. This component operates with a reverse standoff voltage of 40.2V and provides clamping protection at 64.8V with a peak pulse current rating of 9.3A. The part is actively produced, AEC-Q101 qualified for automotive applications, and RoHS3 compliant. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters that ensure functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	40.2	V
Voltage - Breakdown (Min)	44.7	V
Voltage - Clamping (Max) @ Ipp	64.8	V
Current - Peak Pulse (10/1000µs)	9.3	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65 to 150	°C
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Capacitance @ 1MHz	425	pF

Substitute Part Grouping Explanation

Substitute parts for the SZP6SMB47AT3G are qualified based on the following criteria:

Electrical Parameter Matching:

Voltage - Reverse Standoff (Typ): 40.2V
Voltage - Breakdown (Min): 44.7V
Voltage - Clamping (Max) @ Ipp: 64.8V
Current - Peak Pulse (10/1000µs): 9.3A to 15.4A (within acceptable range for circuit protection)
Power - Peak Pulse: 600W to 1000W

Package Compatibility:

Surface mount package: DO-214AA or SMB equivalent
Tape & Reel (TR) packaging for automated assembly

Compliance & Status:

Active product status
RoHS3 compliance
Moisture Sensitivity Level 1 (Unlimited)

Substitutes are grouped by manufacturer and series designation while maintaining electrical equivalence across the specified voltage and current parameters.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ) [V]	Voltage - Clamping (Max) @ Ipp [V]	Current - Peak Pulse (10/1000µs) [A]	Power - Peak Pulse [W]	Operating Temperature [°C]	Package / Case	Product Status	RoHS Status
SZP6SMB47AT3G	Littelfuse Inc.	40.2	64.8	9.3	600	-65 to 150	DO-214AA, SMB	Active	ROHS3 Compliant
1KSMB47A	Taiwan Semiconductor Corporation	40.2	64.8	15.4	1000	-55 to 175	DO-214AA, SMB	Active	ROHS3 Compliant
P6SMB47A	Eaton - Electronics Division	40.2	64.8	9.4	600	-55 to 150	DO-214AA, SMB	Active	RoHS Compliant
TPSMB47A	Littelfuse Inc.	40.2	64.8	9.4	600	-65 to 175	DO-214AA, SMB	Active	ROHS3 Compliant
P6SMB47A-E3/52	Vishay General Semiconductor - Diodes Division	40.2	64.8	9.3	600	-65 to 150	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJP6KE47A-TP	Micro Commercial Co	40.2	64.8	9.4	600	-55 to 175	DO-214AA, SMB	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain electrical equivalence to the SZP6SMB47AT3G across the critical voltage and current parameters. Selection among substitutes should be based on the following factors:

Direct Electrical Equivalents (9.3A Peak Pulse Current):

P6SMB47A-E3/52 (Vishay) provides identical peak pulse current and power rating with extended temperature range to -65°C
SZP6SMB47AT3G (Littelfuse) remains the primary specification

Higher Current Capability:

1KSMB47A (Taiwan Semiconductor Corporation) offers 15.4A peak pulse current and 1000W power rating, suitable for applications requiring enhanced transient protection margin

Temperature Range Considerations:

TPSMB47A (Littelfuse) and SMBJP6KE47A-TP (Micro Commercial Co) extend the upper operating temperature to 175°C
SZP6SMB47AT3G and P6SMB47A limit upper temperature to 150°C

Compliance & Qualification:

All substitutes maintain RoHS3 compliance and Moisture Sensitivity Level 1
SZP6SMB47AT3G and TPSMB47A carry AEC-Q101 automotive qualification
All parts are active products with established supply chains

Frequently Asked Questions (FAQ)

Q: Can I substitute the SZP6SMB47AT3G with any of the listed parts?

A: Yes, all listed parts are electrically equivalent based on matching voltage ratings (40.2V standoff, 64.8V clamping) and comparable peak pulse current ratings (9.3A to 15.4A). Package compatibility (DO-214AA/SMB surface mount) is maintained across all substitutes.

Q: What is the difference between the 1KSMB47A and other substitutes?

A: The 1KSMB47A provides higher peak pulse current (15.4A) and power dissipation (1000W) compared to the standard 600W rating of other substitutes. This makes it suitable for applications requiring greater transient energy absorption, though it remains electrically compatible at the specified voltage levels.

Q: Are there temperature range differences I should consider?

A: Yes. The SZP6SMB47AT3G operates from -65°C to 150°C. The TPSMB47A and SMBJP6KE47A-TP extend the upper limit to 175°C. The 1KSMB47A and P6SMB47A have a lower minimum temperature of -55°C. Select based on your application's thermal requirements.

Q: Does automotive qualification matter for my application?

A: The SZP6SMB47AT3G and TPSMB47A carry AEC-Q101 automotive qualification. If your application requires automotive-grade components, these two parts are the appropriate choices. Other substitutes are suitable for general-purpose and telecom applications.

Q: Can I use P6SMB47A-E3/52 as a direct replacement?

A: Yes. The P6SMB47A-E3/52 (Vishay) matches the SZP6SMB47AT3G in peak pulse current (9.3A), power rating (600W), and temperature range (-65°C to 150°C), making it a direct functional equivalent.

Q: What packaging format should I specify for automated assembly?

A: All substitute parts are available in Tape & Reel (TR) packaging, suitable for automated pick-and-place assembly. The DO-214AA/SMB package footprint is consistent across all listed parts.

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