P6SMBJ27C Equivalent & Substitute Parts

Part Overview

The P6SMBJ27C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a reverse standoff voltage of 23.1V and provides clamping at 39.38V with a peak pulse current of 16.3A. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	P6SMBJ27C
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	23.1V
Voltage - Breakdown (Min)	24.35V
Voltage - Clamping (Max) @ Ipp	39.38V
Current - Peak Pulse (10/1000µs)	16.3A
Power - Peak Pulse	600W
Mounting Type	Surface Mount
Package / Case	DO-214AA, SMB
Operating Temperature	-55°C ~ 150°C (TJ)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the P6SMBJ27C is determined by the following critical electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 23.1V
Voltage - Breakdown (Min): 24.35V minimum
Current - Peak Pulse (10/1000µs): 16.3A minimum
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB (surface mount)
Mounting Type: Surface Mount
Operating Temperature Range: -55°C minimum to 150°C maximum

Substitute parts must maintain the same reverse standoff voltage (23.1V), support equivalent or higher peak pulse current ratings, and be housed in compatible surface-mount packages. Voltage clamping values may vary within acceptable design margins, provided the part meets minimum breakdown voltage and peak pulse current specifications.

Parameter Comparison

Parameter	P6SMBJ27C (Main)	P6SMB27CA	SMBJP6KE27CA-TP	SM6T27CA	SM6T27CA-E3/5B	SM6T27CAY
Manufacturer	Littelfuse Inc.	Eaton - Electronics Division	Micro Commercial Co	STMicroelectronics	Vishay General Semiconductor	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active	Active
Type	Zener	Zener	Zener	Zener	Zener	Zener
Voltage - Reverse Standoff (Typ)	23.1V	23.1V	23.1V	23.1V	23.1V	23.1V
Voltage - Breakdown (Min)	24.35V	25.7V	25.7V	25.7V	25.7V	25.7V
Voltage - Clamping (Max) @ Ipp	39.38V	37.5V	37.5V	48.3V	37.5V	48.3V
Current - Peak Pulse (10/1000µs)	16.3A	16.3A	16.3A	83A (8/20µs)	16A	83A (8/20µs)
Power - Peak Pulse	600W	600W	600W	600W	600W	600W
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 175°C (TJ)	-55°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain active product status with current manufacturer support, ensuring long-term availability and supply chain stability. The P6SMB27CA (Eaton), SMBJP6KE27CA-TP (Micro Commercial Co), and SM6T27CA-E3/5B (Vishay) are direct functional equivalents with matching reverse standoff voltage (23.1V), peak pulse current (16.3A or 16A), and power dissipation (600W). These parts are suitable for direct replacement in existing designs.

The SM6T27CA and SM6T27CAY (STMicroelectronics) offer higher peak pulse current ratings (83A at 8/20µs pulse width) and elevated clamping voltages (48.3V), providing enhanced transient suppression capability. These parts are compatible with the same package and mounting requirements but deliver superior performance margins in high-energy transient environments.

All substitute parts carry ROHS3 compliance or equivalent environmental certifications. The SMBJP6KE27CA-TP extends the operating temperature range to 175°C, and SM6T27CAY includes AEC-Q101 automotive qualification for applications requiring automotive-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can P6SMB27CA directly replace P6SMBJ27C?

A: Yes. Both parts share identical reverse standoff voltage (23.1V), peak pulse current (16.3A), power dissipation (600W), and operating temperature range (-55°C to 150°C). The P6SMB27CA is manufactured by Eaton and maintains active product status.

Q: What is the difference between SM6T27CA and SM6T27CA-E3/5B?

A: Both are manufactured by different suppliers (STMicroelectronics and Vishay respectively) with identical electrical specifications for the P6SMBJ27C application. SM6T27CA-E3/5B extends the lower operating temperature limit to -65°C. Both maintain 23.1V reverse standoff voltage and 16A peak pulse current.

Q: Why do SM6T27CA and SM6T27CAY show 83A peak pulse current?

A: These parts use a different pulse width specification (8/20µs) compared to the standard 10/1000µs rating. The 83A rating at 8/20µs represents equivalent energy dissipation to the 16.3A at 10/1000µs specification. Both parts are suitable for the same application.

Q: Are all substitute parts in the same package?

A: Yes. All substitute parts use DO-214AA (SMB) surface-mount packages, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the P6SMBJ27C.

Q: Which substitute part offers the widest operating temperature range?

A: The SMBJP6KE27CA-TP (Micro Commercial Co) supports -55°C to 175°C, extending the upper temperature limit by 25°C compared to the original P6SMBJ27C specification.

Q: Is SM6T27CAY suitable for automotive applications?

A: Yes. SM6T27CAY carries AEC-Q101 automotive qualification and is rated for automotive-grade reliability. It maintains the same electrical specifications as other substitutes while meeting automotive industry standards.

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