P6SMB200 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The P6SMB200 is a unidirectional transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a reverse standoff voltage of 171V and provides clamping protection at 287.7V maximum. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and field replacement requirements.

Key Parameters

Parameter	Value	Unit
Reverse Standoff Voltage (Typ)	171	V
Voltage - Breakdown (Min)	180	V
Voltage - Clamping (Max) @ Ipp	287.7	V
Current - Peak Pulse (10/1000µs)	2.2	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the P6SMB200 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Reverse Standoff Voltage: 171V (typical)
Voltage Breakdown (Minimum): 180V or higher
Voltage Clamping (Maximum): within acceptable range for circuit protection (274V–287.7V acceptable; 353V represents higher clamping performance)
Current - Peak Pulse: 2.2A nominal (2.19A acceptable within tolerance)
Power - Peak Pulse: 600W
Package / Case: DO-214AA (SMB) surface mount
Mounting Type: Surface mount
Type: Zener diode, unidirectional (1 channel)
RoHS Compliance: ROHS3 Compliant

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (274V Clamping): Parts with identical or near-identical clamping voltage (274V), peak pulse current (2.2A or 2.19A), and full parameter alignment. These include Vishay P6SMB200A variants, Meritek P6SMB200A, Micro Commercial SMBJP6KE200A-TP, Comchip TVP06B201A-G, and Littelfuse SZP6SMB200AT3G.

Category B - Higher Performance Equivalent (353V Clamping): STMicroelectronics SM6T200A provides higher clamping voltage (353V) and significantly higher peak pulse current (11.3A at 8/20µs), maintaining the same reverse standoff voltage and package format. This part offers enhanced transient suppression capability within the same mechanical footprint.

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage (V)	Breakdown Min (V)	Clamping Max (V)	Peak Pulse Current (A)	Power Peak (W)	Temp Range (°C)	Package	Status
P6SMB200	Littelfuse Inc.	171	180	287.7	2.2	600	-55 to 150	DO-214AA (SMB)	Obsolete
P6SMB200A	Meritek	171	190	274	2.19	600	-55 to 150	DO-214AA (SMB)	Active
SZP6SMB200AT3G	Littelfuse Inc.	171	190	274	2.2	600	-65 to 150	DO-214AA (SMB)	Active
P6SMB200A-E3/52	Vishay General Semiconductor	171	190	274	2.2	600	-65 to 150	DO-214AA (SMB)	Active
P6SMB200A-M3/52	Vishay General Semiconductor	171	190	274	2.2	600	-65 to 150	DO-214AA (SMBJ)	Active
P6SMB200A-M3/5B	Vishay General Semiconductor	171	190	274	2.2	600	-65 to 150	DO-214AA (SMBJ)	Active
P6SMB200AHE3_A/H	Vishay General Semiconductor	171	190	274	2.2	600	-65 to 150	DO-214AA (SMB)	Obsolete
SMBJP6KE200A-TP	Micro Commercial Co	171	190	274	2.2	600	-55 to 175	DO-214AA (SMBJ)	Active
TVP06B201A-G	Comchip Technology	171	190	274	2.19	600	-55 to 150	DO-214AA (SMB)	Active
SM6T200A	STMicroelectronics	171	190	353	11.3 (8/20µs)	600	-55 to 150	DO-214AA (SMB)	Active

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

For applications requiring direct replacement with matched electrical characteristics, select from active parts with 274V clamping voltage and 2.2A peak pulse current:

SZP6SMB200AT3G (Littelfuse Inc.): Maintains original manufacturer continuity with extended temperature range (-65°C to 150°C) and AEC-Q101 automotive qualification. Recommended for automotive and high-reliability applications.
P6SMB200A-E3/52 or P6SMB200A-M3/52 (Vishay General Semiconductor): Active production status with extended temperature range (-65°C to 150°C). Available in both tape & reel and cut tape packaging options. Suitable for general industrial applications.
SMBJP6KE200A-TP (Micro Commercial Co): Active status with extended upper temperature limit (-55°C to 175°C). Appropriate for high-temperature environments.
TVP06B201A-G (Comchip Technology): Active status with standard temperature range. Suitable for cost-optimized designs.

Secondary Substitute (Higher Performance):

SM6T200A (STMicroelectronics): Provides enhanced transient suppression with 353V clamping voltage and 11.3A peak pulse current (8/20µs pulse definition). Maintains identical reverse standoff voltage (171V) and DO-214AA package. Select this part when circuit design permits higher clamping voltage and requires superior transient energy absorption capability.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. Parts designated with AEC-Q101 qualification (SZP6SMB200AT3G, P6SMB200AHE3_A/H) are suitable for automotive applications requiring formal qualification documentation.

Frequently Asked Questions (FAQ)

Q: Can I use SM6T200A as a direct replacement for P6SMB200?

A: SM6T200A is electrically compatible at the reverse standoff voltage level (171V) and shares the DO-214AA package. However, the clamping voltage is higher (353V vs. 287.7V) and peak pulse current is significantly higher (11.3A vs. 2.2A). Use SM6T200A only if circuit design analysis confirms that higher clamping voltage does not adversely affect downstream components and the enhanced transient suppression is acceptable or beneficial.

Q: What is the difference between P6SMB200A-E3/52 and P6SMB200A-M3/52?

A: Both parts are manufactured by Vishay General Semiconductor with identical electrical specifications (171V standoff, 274V clamping, 2.2A peak pulse). The difference is packaging: P6SMB200A-E3/52 is supplied in tape & reel (TR) format, while P6SMB200A-M3/52 is supplied in cut tape (CT) format. Select based on your assembly process requirements.

Q: Are there temperature range differences between substitutes?

A: Yes. Most active substitutes extend the lower operating temperature to -65°C (vs. -55°C for the original P6SMB200). SMBJP6KE200A-TP extends the upper limit to 175°C. Verify that your application requirements align with the selected part's temperature range.

Q: Is the Littelfuse SZP6SMB200AT3G recommended over other substitutes?

A: SZP6SMB200AT3G is recommended when manufacturer continuity with Littelfuse is required or when AEC-Q101 automotive qualification is mandated. For non-automotive applications, Vishay P6SMB200A variants offer equivalent performance with broader packaging options and higher inventory availability.

Q: What does "Clamping Voltage" mean in the context of TVS diode selection?

A: Clamping voltage is the maximum voltage the TVS diode allows across its terminals during a transient event at the specified peak pulse current. Lower clamping voltage provides tighter protection but requires higher peak pulse current capability. The P6SMB200 clamps at 287.7V; most active substitutes clamp at 274V (lower, tighter protection); SM6T200A clamps at 353V (higher, allowing more voltage transient).

Q: Can I substitute P6SMB200 with a part from a different manufacturer if electrical parameters match?

A: Yes, provided all critical parameters align: reverse standoff voltage (171V), breakdown voltage (≥180V), clamping voltage (within acceptable circuit tolerance), peak pulse current (≥2.2A), power rating (600W), package (DO-214AA SMB), and RoHS compliance. Cross-manufacturer substitution is valid when these parameters are met.

Q: What does "Peak Pulse (10/1000µs)" mean?

A: This specifies the pulse waveform used for testing: 10 microseconds rise time and 1000 microseconds pulse width. SM6T200A uses a different pulse definition (8/20µs), which is a standard automotive transient waveform. Both are valid test standards; the different pulse definition explains why SM6T200A shows higher peak pulse current (11.3A) while maintaining the same 600W power rating.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message