P6SMB30C Equivalent & Substitute Parts

Part Overview

The P6SMB30C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a reverse standoff voltage of 25.6V and provides clamping at 43.47V with peak pulse current handling of 14.7A. The part is currently obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Reverse Standoff Voltage (Typ)	25.6V
Voltage - Breakdown (Min)	27V
Voltage - Clamping (Max) @ Ipp	43.47V
Current - Peak Pulse (10/1000µs)	14.7A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Type	Zener
Bidirectional Channels	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the P6SMB30C is determined by the following critical parameters:

Reverse Standoff Voltage: 25.6V (fixed requirement)
Voltage - Breakdown (Min): 27V to 28.5V (acceptable range)
Voltage - Clamping (Max) @ Ipp: 41.4V to 43.47V (acceptable range)
Current - Peak Pulse: 14.4A to 14.7A (acceptable range)
Power - Peak Pulse: 600W (fixed requirement)
Package / Case: DO-214AA, SMB (fixed requirement)
Mounting Type: Surface Mount (fixed requirement)
Operating Temperature: -55°C minimum to 150°C maximum (acceptable range)

Substitute parts are grouped into two categories based on clamping voltage performance:

Group A (Standard Clamping): Parts with clamping voltage of 41.4V to 41.5V, including P6SMB30CA (Eaton), SZP6SMB30CAT3G (Littelfuse), P6SMB30CA-M3/52 (Vishay), P6SMB30CA-M3/5B (Vishay), SM6T30CA-E3/52 (Vishay), and SM6T30CA-E3/5B (Vishay).

Group B (Higher Clamping Voltage): Parts with clamping voltage of 54.6V, including SM6T30CA (STMicroelectronics) and SM6T30CAY (STMicroelectronics). These provide enhanced transient suppression but operate at higher clamping levels.

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max @ Ipp (V)	Peak Pulse Current (A)	Power Peak Pulse (W)	Temp Range (°C)	Package	Status
P6SMB30C	Littelfuse	25.6	27	43.47	14.7	600	-55 ~ 150	DO-214AA, SMB	Obsolete
P6SMB30CA	Eaton - Electronics Division	25.6	28.5	41.4	14.7	600	-55 ~ 150	DO-214AA, SMB	Active
SZP6SMB30CAT3G	Littelfuse Inc.	25.6	28.5	41.4	14.4	600	-65 ~ 150	DO-214AA, SMB	Active
P6SMB30CA-M3/52	Vishay General Semiconductor - Diodes Division	25.6	28.5	41.4	14.5	600	-65 ~ 150	DO-214AA, SMB	Active
P6SMB30CA-M3/5B	Vishay General Semiconductor - Diodes Division	25.6	28.5	41.4	14.5	600	-65 ~ 150	DO-214AA, SMB	Active
P6SMB30CAHE3_A/H	Vishay General Semiconductor - Diodes Division	25.6	28.5	41.4	14.5	600	-65 ~ 150	DO-214AA, SMB	Obsolete
SM6T30CA-E3/52	Vishay General Semiconductor - Diodes Division	25.6	28.5	41.5	14.5	600	-65 ~ 150	DO-214AA, SMB	Active
SM6T30CA-E3/5B	Vishay General Semiconductor - Diodes Division	25.6	28.5	41.5	14.5	600	-65 ~ 150	DO-214AA, SMB	Active
SM6T30CA	STMicroelectronics	25.6	28.5	54.6	75 (8/20µs)	600	-55 ~ 150	DO-214AA, SMB	Active
SM6T30CAY	STMicroelectronics	25.6	28.5	54.6	75 (8/20µs)	600	-55 ~ 150	DO-214AA, SMB	Active

Engineering Selection Recommendations

Primary Substitutes (Group A - Standard Clamping):

P6SMB30CA (Eaton) and SM6T30CA-E3/52 (Vishay) are the preferred active substitutes. Both maintain clamping voltage within 41.4V to 41.5V, matching the electrical performance envelope of the P6SMB30C. P6SMB30CA offers the widest availability (20,000 units in stock) and is actively produced. SM6T30CA-E3/52 provides extended temperature range (-65°C to 150°C) and is RoHS3 compliant with REACH unaffected status.

SZP6SMB30CAT3G (Littelfuse) is the manufacturer-recommended substitute from the original supplier. It includes AEC-Q101 automotive qualification and extended temperature range, suitable for applications requiring automotive-grade components.

P6SMB30CA-M3/52 and P6SMB30CA-M3/5B (Vishay) are functionally equivalent alternatives with extended temperature range and RoHS3 compliance. Both are actively produced with adequate inventory.

Secondary Substitutes (Group B - Higher Clamping Voltage):

SM6T30CA and SM6T30CAY (STMicroelectronics) operate at 54.6V clamping voltage with significantly higher peak pulse current (75A at 8/20µs). These parts are suitable only for applications where higher clamping voltage is acceptable and enhanced transient suppression is required. SM6T30CAY includes AEC-Q101 automotive qualification.

Compliance Considerations:

All substitute parts are RoHS3 compliant and carry MSL rating of 1 (Unlimited). Parts designated with automotive qualification (SZP6SMB30CAT3G, SM6T30CAY) meet AEC-Q101 standards. REACH status is unaffected for all active substitutes.

Frequently Asked Questions (FAQ)

Q: Can P6SMB30CA directly replace P6SMB30C?

A: Yes. P6SMB30CA maintains the same reverse standoff voltage (25.6V), operates within the acceptable clamping voltage range (41.4V vs. 43.47V), and handles the same peak pulse current (14.7A). Both use DO-214AA SMB packaging. The primary difference is that P6SMB30CA is actively produced while P6SMB30C is obsolete.

Q: What is the difference between Group A and Group B substitutes?

A: Group A substitutes (P6SMB30CA, SZP6SMB30CAT3G, Vishay variants) maintain clamping voltage at 41.4V to 41.5V, closely matching the original P6SMB30C performance. Group B substitutes (SM6T30CA, SM6T30CAY) operate at 54.6V clamping voltage with 75A peak pulse current, providing enhanced transient suppression but at higher clamping levels. Group B is suitable only when higher clamping voltage is acceptable in the application.

Q: Are there temperature range differences between substitutes?

A: Yes. The original P6SMB30C and most Group A substitutes operate from -55°C to 150°C. SZP6SMB30CAT3G, P6SMB30CA-M3/52, P6SMB30CA-M3/5B, SM6T30CA-E3/52, and SM6T30CA-E3/5B extend the lower limit to -65°C. Applications requiring operation below -55°C should specify these extended-range variants.

Q: What packaging options are available?

A: All substitutes use DO-214AA SMB surface-mount packaging. Packaging formats vary by supplier: Eaton offers Cut Tape and Digi-Reel, Littelfuse provides Tape & Reel, Vishay offers Tape & Box or Cut Tape & Digi-Reel, and STMicroelectronics supplies Cut Tape & Digi-Reel. Verify packaging compatibility with your procurement and assembly requirements.

Q: Which substitute has the best availability?

A: P6SMB30CA (Eaton) has the highest inventory at 20,000 units in stock. SM6T30CA-E3/52 (Vishay) follows with 30,300 units. Both are actively produced and suitable for high-volume applications.

Q: Is automotive qualification required?

A: Automotive qualification (AEC-Q101) is available in SZP6SMB30CAT3G (Littelfuse) and SM6T30CAY (STMicroelectronics). Specify these variants only if your application requires automotive-grade components. Standard industrial-grade substitutes are sufficient for general-purpose applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant with MSL rating of 1 (Unlimited). REACH status is unaffected for all active substitutes, confirming compliance with EU environmental regulations.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message