P6SMBJ24C Equivalent & Substitute Parts

Part Overview

The P6SMBJ24C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 20.5V reverse standoff voltage and 600W peak pulse power rating. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	P6SMBJ24C
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	20.5V
Voltage - Breakdown (Min)	21.6V
Voltage - Clamping (Max) @ Ipp	34.86V
Current - Peak Pulse (10/1000µs)	18.4A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 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 P6SMBJ24C is determined by the following critical parameters:

Reverse standoff voltage: 20.5V (Typ)
Breakdown voltage minimum: 21.6V or higher
Clamping voltage maximum @ Ipp: Must accommodate transient suppression requirements
Peak pulse current: 18.4A minimum
Peak pulse power: 600W
Package type: DO-214AA (SMB) surface mount
Bidirectional operation: Single channel
Operating temperature range: -55°C minimum to 150°C minimum

Substitute parts must maintain electrical compatibility within these parameters while meeting the same mechanical and thermal specifications. Parts are grouped by their ability to satisfy these core requirements.

Parameter Comparison

Parameter	P6SMBJ24C (Main)	P6SMB24CA	SMBJP6KE24CA-TP	SM6T24CA	SM6T24CA-E3/5B	SM6T24CAY
Manufacturer	Littelfuse Inc.	Eaton - Electronics Division	Micro Commercial Co	STMicroelectronics	Vishay General Semiconductor	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active	Active
Voltage - Reverse Standoff (Typ)	20.5V	20.5V	20.5V	20.5V	20.5V	20.5V
Voltage - Breakdown (Min)	21.6V	22.8V	22.8V	22.8V	22.8V	22.8V
Voltage - Clamping (Max) @ Ipp	34.86V	33.2V	33.2V	42.8V	33.2V	42.8V
Current - Peak Pulse (10/1000µs)	18.4A	18.4A	18.4A	93A (8/20µs)	18A	93A (8/20µs)
Power - Peak Pulse	600W	600W	600W	600W	600W	600W
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C	-55°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 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

Engineering Selection Recommendations

All substitute parts listed maintain the core electrical parameters required for P6SMBJ24C replacement: 20.5V reverse standoff voltage, 600W peak pulse power, and DO-214AA (SMB) surface mount packaging.

P6SMB24CA (Eaton - Electronics Division) and SM6T24CA-E3/5B (Vishay General Semiconductor) provide direct electrical equivalence with clamping voltages of 33.2V and peak pulse currents of 18.4A and 18A respectively. Both are active products with full RoHS3 compliance.

SMBJP6KE24CA-TP (Micro Commercial Co) offers extended operating temperature range to 175°C while maintaining equivalent electrical specifications. This part is active and ROHS3 compliant.

SM6T24CA and SM6T24CAY (STMicroelectronics) feature higher peak pulse current ratings (93A at 8/20µs) and clamping voltages of 42.8V. SM6T24CAY includes automotive-grade qualification (AEC-Q101). Both are active products with ROHS3 compliance.

Selection should be based on application-specific requirements for clamping voltage, peak pulse current capacity, and operating temperature range, with preference for active products from established manufacturers.

Frequently Asked Questions (FAQ)

Q: Can P6SMB24CA directly replace P6SMBJ24C?

A: Yes. P6SMB24CA maintains identical reverse standoff voltage (20.5V), equivalent clamping voltage (33.2V vs 34.86V), matching peak pulse current (18.4A), and identical power rating (600W). Both use DO-214AA (SMB) surface mount packaging. The part is active and widely available.

Q: What is the difference between SM6T24CA and SM6T24CA-E3/5B?

A: Both parts share the same electrical specifications (20.5V standoff, 33.2V clamping, 18A peak pulse current). SM6T24CA-E3/5B has an extended lower operating temperature limit (-65°C vs -55°C) and is supplied by Vishay. SM6T24CA is supplied by STMicroelectronics. Selection depends on temperature range requirements and supplier availability.

Q: Why do SM6T24CA and SM6T24CAY show higher peak pulse current (93A)?

A: These parts use a different pulse waveform specification (8/20µs) compared to the standard 10/1000µs waveform. The 93A rating reflects performance under this alternative pulse profile. For standard 10/1000µs pulse applications, these parts remain compatible with the P6SMBJ24C requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are RoHS3 compliant, matching the compliance status of the original P6SMBJ24C.

Q: Does package type vary among substitutes?

A: All substitute parts use DO-214AA (SMB) surface mount packaging, identical to the P6SMBJ24C. Packaging specifications are consistent across all options.

Q: Which substitute offers the widest operating temperature range?

A: SMBJP6KE24CA-TP extends to 175°C maximum junction temperature, compared to 150°C for most other options. SM6T24CA-E3/5B extends to -65°C minimum, providing the lowest temperature rating.

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