P6SMB62 Equivalent & Substitute Parts

Part Overview

The P6SMB62 is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This unidirectional Zener diode operates with a 53V reverse standoff voltage and provides 89.25V maximum clamping voltage at peak pulse current. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	P6SMB62	—
Manufacturer	Littelfuse Inc.	—
Category	Transient Voltage Suppressors (TVS)	—
Type	Zener	—
Unidirectional Channels	1	—
Voltage - Reverse Standoff (Typ)	53	V
Voltage - Breakdown (Min)	55.8	V
Voltage - Clamping (Max) @ Ipp	89.25	V
Current - Peak Pulse (10/1000µs)	7.2	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	DO-214AA, SMB	—
RoHS Status	ROHS3 Compliant	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the P6SMB62 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Reverse standoff voltage: 53V (Typ)
Breakdown voltage minimum: 55.8V or higher
Clamping voltage maximum: 89.25V or lower (preferred for circuit protection margin)
Peak pulse current: 7.2A or higher
Peak pulse power: 600W
Unidirectional configuration (single channel)
Zener diode type

Mechanical Compatibility Criteria:

Package: DO-214AA / SMB form factor
Mounting type: Surface Mount
Operating temperature range: -55°C to 150°C or wider

Compliance Criteria:

RoHS3 compliance required
Moisture sensitivity level: 1 (Unlimited)

Substitute parts are grouped into two categories: direct electrical equivalents with identical or superior electrical performance, and functional alternatives that meet the core protection requirements within acceptable parameter tolerances.

Parameter Comparison

Parameter	P6SMB62 (Main)	P6SMB62A (Thinking)	SZP6SMB62AT3G (Littelfuse)	P6SMB62A-E3/5B (Vishay)	SM6T68A (STMicroelectronics)	TVP06B620A-G (Comchip)
Manufacturer	Littelfuse Inc.	Thinking Electronics	Littelfuse Inc.	Vishay	STMicroelectronics	Comchip Technology
Product Status	Obsolete	Active	Active	Active	Active	Active
Voltage - Reverse Standoff (Typ)	53V	53V	53V	53V	58.1V	—
Voltage - Breakdown (Min)	55.8V	58.9V	58.9V	58.9V	64.6V	—
Voltage - Clamping (Max) @ Ipp	89.25V	85V	85V	85V	121V	—
Current - Peak Pulse (10/1000µs)	7.2A	7.06A	7.1A	7.1A	33A (8/20µs)	—
Power - Peak Pulse	600W	600W	600W	600W	600W	600W
Operating Temperature Range	-55 to 150°C	-55 to 150°C	-65 to 150°C	-65 to 150°C	-55 to 150°C	-55 to 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Grade	—	—	Automotive	—	—	—
Qualification	—	—	AEC-Q101	—	—	—

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

P6SMB62A (Thinking Electronics Industrial Co.) and P6SMB62A-E3/5B (Vishay General Semiconductor) are direct electrical equivalents with active product status. Both maintain the 53V reverse standoff voltage and deliver clamping voltages of 85V, which is lower than the original 89.25V specification, providing improved protection margin. Peak pulse current ratings of 7.06A and 7.1A respectively are within 1.4% of the original 7.2A specification. Both parts are RoHS3 compliant and packaged in DO-214AA SMB form factor. P6SMB62A-E3/5B offers extended operating temperature range (-65 to 150°C) compared to the original specification.

Manufacturer-Recommended Substitute (Littelfuse):

SZP6SMB62AT3G (Littelfuse Inc.) is the manufacturer-recommended replacement, maintaining the original manufacturer's design lineage. This part is AEC-Q101 qualified with automotive-grade designation, offering enhanced reliability for critical applications. It provides identical 53V reverse standoff voltage, 85V clamping voltage, and 7.1A peak pulse current. The extended temperature range (-65 to 150°C) and ROHS3 compliance align with modern design requirements. This option is preferred when maintaining original manufacturer continuity is a design priority.

Alternative Substitute (Higher Performance):

SM6T68A (STMicroelectronics) operates at a higher voltage class (58.1V reverse standoff, 64.6V breakdown minimum, 121V clamping maximum) with significantly higher peak pulse current capability (33A at 8/20µs pulse). This part is suitable only when circuit design permits higher clamping voltages and when enhanced transient current handling is required. The higher clamping voltage may not be appropriate for sensitive low-voltage circuits.

Limited Data Substitute:

TVP06B620A-G (Comchip Technology) lacks complete electrical parameter specification in available documentation. This part should be selected only when alternative options are unavailable and detailed datasheet verification is performed independently.

Frequently Asked Questions (FAQ)

Q: Can I use P6SMB62A as a direct replacement for the obsolete P6SMB62?

A: Yes. P6SMB62A maintains the critical 53V reverse standoff voltage and delivers 85V clamping voltage with 7.06A peak pulse current, meeting the electrical requirements for direct substitution. The lower clamping voltage (85V vs. 89.25V) actually improves circuit protection margin. Both parts use identical DO-214AA SMB packaging and are RoHS3 compliant.

Q: What is the difference between the clamping voltage specifications?

A: The original P6SMB62 specifies 89.25V maximum clamping voltage at peak pulse current. Most active substitutes (P6SMB62A, SZP6SMB62AT3G, P6SMB62A-E3/5B) specify 85V clamping voltage. Lower clamping voltage provides tighter voltage regulation and better transient suppression. Verify that your circuit design can accommodate the lower clamping voltage; in most protection applications, this is beneficial.

Q: Is SZP6SMB62AT3G better than P6SMB62A?

A: SZP6SMB62AT3G is the Littelfuse manufacturer-recommended replacement with AEC-Q101 automotive qualification and extended temperature range (-65 to 150°C). P6SMB62A is a functionally equivalent alternative from Thinking Electronics. Selection depends on application requirements: choose SZP6SMB62AT3G for automotive or mission-critical applications requiring manufacturer qualification; choose P6SMB62A for general industrial applications where cost and availability are primary factors.

Q: Can I use SM6T68A as a substitute?

A: SM6T68A is not a direct equivalent. It operates at a higher voltage class (58.1V standoff vs. 53V) with significantly higher clamping voltage (121V vs. 85-89V) and peak pulse current (33A vs. 7.2A). Use SM6T68A only if your circuit design specifically requires higher voltage operation and enhanced transient current handling. Substituting into a circuit designed for 53V standoff voltage may result in inadequate protection.

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

A: Yes. All listed substitutes use DO-214AA SMB surface-mount packaging, ensuring mechanical and thermal compatibility with the original P6SMB62 PCB layout. Verify tape-and-reel or cut-tape packaging availability with your supplier if specific packaging format is required for assembly processes.

Q: What compliance certifications should I verify?

A: All recommended substitutes are RoHS3 compliant with moisture sensitivity level 1 (unlimited). SZP6SMB62AT3G includes AEC-Q101 automotive qualification. Verify REACH compliance status with your supplier if operating in regulated markets. All parts carry ECCN EAR99 classification for export purposes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message