P6SMB27CAT3 Equivalent & Substitute Parts

Part Overview

The P6SMB27CAT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for surface mount applications in the DO-214AA (SMB) package. This component provides 23.1V reverse standoff voltage with 37.5V maximum clamping voltage and 16A peak pulse current capability. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements.

Substiute Parts

P6SMB27CAT3

onsemiIn Stock: 832P6SMB27CAT3 Datasheet

Current PartRFQ

P6SMB27CA

Eaton - Electronics DivisionIn Stock: 30388P6SMB27CA Datasheet

DirectRFQ

P6SMB27CA

Eaton - Electronics DivisionIn Stock: 30388P6SMB27CA Datasheet

DirectRFQ

1KSMB27CA

Taiwan Semiconductor CorporationIn Stock: 11451KSMB27CA Datasheet

SimilarRFQ

SM6T27CA

STMicroelectronicsIn Stock: 14509SM6T27CA Datasheet

SimilarRFQ

SM6T27CAY

STMicroelectronicsIn Stock: 2212SM6T27CAY Datasheet

SimilarRFQ

SMBJ24CA

MDDIn Stock: 210159SMBJ24CA Datasheet

SimilarRFQ

SMBJ24CA

MDDIn Stock: 210159SMBJ24CA Datasheet

SimilarRFQ

SMBJ24CA

MDDIn Stock: 210159SMBJ24CA Datasheet

SimilarRFQ

SMBJP6KE27CA-TP

Micro Commercial CoIn Stock: 6768SMBJP6KE27CA-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB27CAT3 is determined by the following critical electrical and mechanical parameters:

Primary Matching Criteria:

• Voltage - Reverse Standoff (Typ): 23.1V
• Voltage - Breakdown (Min): 25.7V
• Voltage - Clamping (Max) @ Ipp: 37.5V
• Current - Peak Pulse (10/1000µs): 16A minimum
• Power - Peak Pulse: 600W minimum
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Bidirectional Channels: 1

Substitute parts are classified into two categories:

Direct Equivalents: Parts with identical electrical specifications and active product status, suitable for direct replacement without circuit redesign.

Similar Alternatives: Parts with matching voltage parameters and package but variations in peak pulse current, clamping voltage, or operating temperature range. These require engineering evaluation for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Preferred for Active Production):

P6SMB27CA (Eaton - Electronics Division) is the primary direct equivalent. This part maintains identical electrical specifications (23.1V standoff, 37.5V clamping, 16.3A peak pulse) with active product status and RoHS compliance. The marginal increase in peak pulse current (16.3A vs. 16A) provides improved margin without affecting circuit performance. Operating temperature range is -55°C to 150°C, which covers most industrial and commercial applications. Packaging is Tape & Reel (TR) with 30,300 units in stock.

SMBJP6KE27CA-TP (Micro Commercial Co) provides an alternative direct equivalent with identical electrical parameters and extended operating temperature range (-55°C to 175°C). This part is suitable for applications requiring higher temperature operation. RoHS3 compliance and 6,665 units in stock.

Enhanced Performance Alternative:

1KSMB27CA (Taiwan Semiconductor Corporation) matches all voltage parameters with significantly higher peak pulse current (26.7A) and power dissipation (1000W). This part is suitable for applications requiring additional transient energy absorption capability. Operating temperature extends to 175°C. ROHS3 compliant with 1,073 units in stock. Selection requires verification that circuit design accommodates the higher current rating.

Voltage-Variant Alternatives:

SM6T27CA and SM6T27CAY (STMicroelectronics) maintain the 23.1V standoff voltage but feature elevated clamping voltage (48.3V) and significantly higher peak pulse current (83A at 8/20µs pulse). These parts are suitable only for applications where the higher clamping voltage is acceptable. SM6T27CAY includes automotive grade and AEC-Q101 qualification, matching the original part's automotive credentials.

SMBJ24CA (MDD) operates at 24V standoff with 38.9V clamping voltage and 15.5A peak pulse current. This part is suitable for applications with slightly higher voltage tolerance. ROHS3 compliant with 210,110 units in stock.

Compliance Considerations:

For automotive applications requiring AEC-Q101 qualification, SM6T27CAY is the only substitute maintaining this certification. For general industrial applications, all listed substitutes provide RoHS3 compliance, addressing the non-compliance status of the obsolete P6SMB27CAT3.

Frequently Asked Questions (FAQ)

Q: Can P6SMB27CA directly replace P6SMB27CAT3 without circuit modification?

A: Yes. P6SMB27CA maintains identical voltage specifications (23.1V standoff, 25.7V breakdown, 37.5V clamping) and package format (DO-214AA, SMB). The 0.3A increase in peak pulse current (16.3A vs. 16A) provides additional margin and does not require circuit redesign. Both parts are unidirectional Zener TVS diodes with 1 bidirectional channel.

Q: What is the difference between direct equivalents and similar alternatives?

A: Direct equivalents (P6SMB27CA, SMBJP6KE27CA-TP) match all critical electrical parameters and are suitable for direct substitution. Similar alternatives (1KSMB27CA, SM6T27CA, SM6T27CAY, SMBJ24CA) maintain voltage specifications but vary in peak pulse current, clamping voltage, or operating temperature. Similar alternatives require engineering evaluation to confirm compatibility with specific circuit requirements.

Q: Why does SM6T27CA have higher peak pulse current (83A) than the original part (16A)?

A: SM6T27CA is a different TVS diode series with enhanced transient suppression capability. The higher current rating reflects a different internal design optimized for higher energy absorption. Selection of this part requires verification that the circuit design accommodates the higher current and the elevated clamping voltage (48.3V vs. 37.5V).

Q: Is the P6SMB27CAT3 suitable for new designs?

A: No. The P6SMB27CAT3 is classified as obsolete and is not recommended for new designs. Active substitutes such as P6SMB27CA (Eaton) or SMBJP6KE27CA-TP (Micro Commercial Co) are recommended for new production.

Q: What is the significance of RoHS compliance in substitute selection?

A: The original P6SMB27CAT3 is RoHS non-compliant. All listed substitutes are RoHS3 compliant, meeting current environmental and regulatory requirements for electronic components. RoHS compliance is mandatory for most commercial and industrial applications.

Q: Can SMBJ24CA be used if the application requires 23.1V standoff voltage?

A: SMBJ24CA operates at 24V standoff voltage, which is 0.9V higher than the original 23.1V specification. This part is suitable only for applications where the higher standoff voltage is acceptable. The clamping voltage (38.9V) is also slightly higher than the original (37.5V). Engineering evaluation is required to confirm compatibility.

Q: What is the difference between SM6T27CA and SM6T27CAY?

A: Both parts are STMicroelectronics TVS diodes with identical electrical specifications. SM6T27CAY includes automotive grade classification and AEC-Q101 qualification, making it suitable for automotive applications. SM6T27CA is classified for general purpose applications. For automotive designs, SM6T27CAY is the appropriate selection.

Q: Are all substitute parts available in the same package format?

A: Yes. All substitute parts listed are available in DO-214AA (SMB) surface mount package format, matching the original P6SMB27CAT3 package. Mounting type is surface mount for all parts, ensuring PCB layout compatibility.