SMBJ40CA-TP Equivalent & Substitute Parts

Part Overview

The SMBJ40CA-TP is a transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a 40V reverse standoff voltage and 64.5V maximum clamping voltage, delivering 9.3A peak pulse current in a compact DO-214AA (SMB) package. The part is active in production, ROHS3 compliant, and carries unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or manufacturing preferences.

Substiute Parts

SMBJ40CA-TP

Micro Commercial CoIn Stock: 5252SMBJ40CA-TP Datasheet

Current PartRFQ

ATV06B400JB-HF

Comchip TechnologyIn Stock: 3901ATV06B400JB-HF Datasheet

DirectRFQ

SMBJ40CA

MDDIn Stock: 10276SMBJ40CA Datasheet

DirectRFQ

SMBJ40CA

MDDIn Stock: 10276SMBJ40CA Datasheet

DirectRFQ

SMBJ40CA

MDDIn Stock: 10276SMBJ40CA Datasheet

DirectRFQ

SMBJ40CA-13-F

Diodes IncorporatedIn Stock: 10335SMBJ40CA-13-F Datasheet

DirectRFQ

SMBJ40CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 3166SMBJ40CA-E3/52 Datasheet

DirectRFQ

SM6T47CAY

STMicroelectronicsIn Stock: 855399SM6T47CAY Datasheet

SimilarRFQ

SMBJ40CA-TR

STMicroelectronicsIn Stock: 40382SMBJ40CA-TR Datasheet

SimilarRFQ

SZ1SMB40CAT3G

Littelfuse Inc.In Stock: 5303SZ1SMB40CAT3G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ40CA-TP are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes maintain identical electrical specifications across all critical parameters: 40V reverse standoff voltage, 44.4V minimum breakdown voltage, 64.5V maximum clamping voltage, 9.3A peak pulse current, and 600W peak pulse power. These parts are mechanically compatible in the DO-214AA (SMB) package and operate within overlapping temperature ranges. Direct substitutes include SMBJ40CA (MDD), SMBJ40CA-13-F (Diodes Incorporated), SMBJ40CA-E3/52 (Vishay), ATV06B400JB-HF (Comchip Technology), and SMBJ40CA-TR (STMicroelectronics).

Similar Substitutes share the same reverse standoff voltage (40V) and package format but exhibit variations in clamping voltage or peak pulse current specifications. SM6T47CAY (STMicroelectronics) and SZ1SMB40CAT3G (Littelfuse) fall into this category, with clamping voltages of 84V and 64.5V respectively, and peak pulse currents of 48A (8/20µs) and 9.3A respectively. These parts require application-level verification to confirm compatibility with circuit protection requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Preferred): SMBJ40CA-13-F (Diodes Incorporated), SMBJ40CA-E3/52 (Vishay), ATV06B400JB-HF (Comchip Technology), SMBJ40CA (MDD), and SMBJ40CA-TR (STMicroelectronics) are functionally equivalent to SMBJ40CA-TP across all critical electrical parameters. All parts maintain ROHS3 compliance and MSL 1 rating. Selection among these direct substitutes depends on packaging preference (tape & reel vs. cut tape), inventory availability, and manufacturing lead times. ATV06B400JB-HF and SZ1SMB40CAT3G carry AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components.

Similar Substitutes (Application-Dependent): SM6T47CAY exhibits a higher clamping voltage (84V) and significantly higher peak pulse current (48A at 8/20µs pulse), making it suitable only for applications where elevated transient suppression is acceptable. SZ1SMB40CAT3G maintains electrical equivalence to the main part while extending the lower operating temperature limit to -65°C, beneficial for extreme cold-environment applications.

All substitute parts are active in production status and maintain ROHS3 and REACH compliance consistent with the main part.

Frequently Asked Questions (FAQ)

Q: Can SMBJ40CA-TR be used as a direct replacement for SMBJ40CA-TP? A: Yes. SMBJ40CA-TR (STMicroelectronics) is a direct substitute with identical reverse standoff voltage (40V), clamping voltage (64.5V), and peak pulse current specification (9.7A, within tolerance of 9.3A). Both parts use DO-214AA (SMB) packaging and operate within compatible temperature ranges (-55 to 150°C vs. -55 to 175°C).

Q: What is the difference between SMBJ40CA-E3/52 and SMBJ40CA-TP? A: Both parts are electrically identical with 40V standoff, 64.5V clamping, and 9.3A peak pulse current. The primary difference is packaging format: SMBJ40CA-E3/52 is supplied in cut tape (CT), while SMBJ40CA-TP is supplied in tape & reel (TR). The "/52" suffix indicates Vishay's packaging designation.

Q: Is SM6T47CAY compatible with SMBJ40CA-TP applications? A: SM6T47CAY shares the same 40V reverse standoff voltage and DO-214AA package but differs significantly in clamping voltage (84V vs. 64.5V) and peak pulse current (48A vs. 9.3A). Compatibility depends on circuit design; higher clamping voltage may be unsuitable for sensitive downstream components. Application-level verification is required.

Q: Which substitute part has the widest operating temperature range? A: SZ1SMB40CAT3G (Littelfuse) operates from -65°C to 150°C, extending the lower temperature limit by 10°C compared to SMBJ40CA-TP (-55°C to 175°C). However, SMBJ40CA-TP maintains a higher upper temperature limit (175°C vs. 150°C).

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with SMBJ40CA-TP.

Q: What is the significance of AEC-Q101 qualification on ATV06B400JB-HF and SZ1SMB40CAT3G? A: AEC-Q101 qualification indicates automotive-grade reliability testing and is required for automotive applications. SMBJ40CA-TP does not carry this designation. Selection of AEC-Q101 qualified parts is mandatory for automotive circuit protection applications.