P6SMB18CA-M3/52 Equivalent & Substitute Parts

Part Overview

The P6SMB18CA-M3/52 is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and provides transient overvoltage protection for general-purpose applications. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified when electrical parameters and mechanical compatibility align within specified tolerances, enabling component interchangeability in circuit designs where transient protection requirements are met.

Substiute Parts

P6SMB18CA-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 914P6SMB18CA-M3/52 Datasheet

Current PartRFQ

P6SMB18CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 2145P6SMB18CA-E3/52 Datasheet

DirectRFQ

1KSMB18CA

Taiwan Semiconductor CorporationIn Stock: 9791KSMB18CA Datasheet

MFR RecommendedRFQ

P6SMB18CA

Eaton - Electronics DivisionIn Stock: 58036P6SMB18CA Datasheet

MFR RecommendedRFQ

P6SMB18CA

Eaton - Electronics DivisionIn Stock: 58036P6SMB18CA Datasheet

MFR RecommendedRFQ

SM6T18CA

STMicroelectronicsIn Stock: 3757SM6T18CA Datasheet

MFR RecommendedRFQ

SM6T18CAY

STMicroelectronicsIn Stock: 10399SM6T18CAY Datasheet

MFR RecommendedRFQ

TPSMB18CA

Littelfuse Inc.In Stock: 3319TPSMB18CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMB18CA-M3/52 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 15.3V
• Voltage - Breakdown (Min): 17.1V
• Voltage - Clamping (Max) @ Ipp: 25.2V (±tolerance)
• Current - Peak Pulse (10/1000µs): 23.8A (minimum threshold)
• Power - Peak Pulse: 600W (minimum threshold)
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Bidirectional Channels: 1
• Type: Zener

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents — Parts with identical or near-identical clamping voltage (25.2V ±0.3V), matching reverse standoff voltage (15.3V), and peak pulse current ≥23.8A. These parts maintain the same protection characteristics and are interchangeable without circuit redesign.

Category 2: Enhanced Performance Substitutes — Parts with identical reverse standoff and breakdown voltages but higher clamping voltage (32.5V) or peak pulse current (≥39.2A). These provide superior transient suppression and are suitable for applications requiring additional margin.

Parameter Comparison

Engineering Selection Recommendations

P6SMB18CA-E3/52 (Vishay) — Identical electrical and thermal specifications to the main part. Packaging differs only in reel format (Tape & Reel vs. Tape & Box). Suitable for direct substitution in production environments where reel packaging is standard. Active product status and ROHS3 compliance maintained.

P6SMB18CA (Eaton) — Meets all critical electrical parameters with marginally higher peak pulse current (24.2A vs. 23.8A). Operating temperature range reduced to -55°C to 150°C. RoHS compliant. Suitable for applications not requiring the extended low-temperature performance of the original part.

TPSMB18CA (Littelfuse) — Direct electrical equivalent with clamping voltage of 25.5V (within tolerance) and extended operating temperature range (-65°C to 175°C). AEC-Q101 automotive qualification available. ROHS3 compliant. Recommended for automotive and extended temperature applications.

1KSMB18CA (Taiwan Semiconductor Corporation) — Enhanced performance substitute with 39.2A peak pulse current and 1000W power rating. Clamping voltage 25.5V. Suitable for applications requiring higher transient current handling capacity. ROHS3 compliant and AEC-Q101 qualified.

SM6T18CA and SM6T18CAY (STMicroelectronics) — Enhanced performance substitutes with significantly higher peak pulse current (123A at 8/20µs) and elevated clamping voltage (32.5V). SM6T18CAY includes AEC-Q101 automotive qualification. Suitable for high-energy transient environments. ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can P6SMB18CA-E3/52 replace P6SMB18CA-M3/52 directly?

A: Yes. Both parts are manufactured by Vishay with identical electrical specifications (15.3V standoff, 25.2V clamping, 23.8A peak pulse). The only difference is packaging format (Tape & Reel vs. Tape & Box). No circuit redesign is required.

Q: What is the difference between the Eaton P6SMB18CA and the Vishay P6SMB18CA-M3/52?

A: Both maintain the same 15.3V standoff voltage, 25.2V clamping voltage, and 600W power rating. The Eaton part has a slightly higher peak pulse current (24.2A vs. 23.8A) and a reduced operating temperature range (-55°C to 150°C vs. -65°C to 150°C). Select based on your minimum operating temperature requirement.

Q: When should I use the 1KSMB18CA instead of the P6SMB18CA-M3/52?

A: The 1KSMB18CA provides enhanced performance with 39.2A peak pulse current and 1000W power rating compared to 23.8A and 600W. Use this substitute when your circuit experiences higher transient current levels or requires additional safety margin. Electrical protection thresholds (15.3V standoff, 25.5V clamping) remain compatible.

Q: Are SM6T18CA and SM6T18CAY suitable replacements?

A: These STMicroelectronics parts maintain the same 15.3V standoff and 17.1V breakdown voltages but have a higher clamping voltage (32.5V) and significantly higher peak pulse current (123A). They are suitable only if your circuit can tolerate the elevated clamping voltage. SM6T18CAY includes automotive qualification (AEC-Q101).

Q: What does the packaging designation mean (SMBJ vs. SMB)?

A: Both designations refer to the DO-214AA surface mount package. SMBJ and SMB are equivalent mechanical packages used interchangeably in standard PCB designs. No footprint modification is required when switching between these designations.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are RoHS3 compliant or RoHS compliant, matching the environmental compliance of the original P6SMB18CA-M3/52.

Q: Can I use TPSMB18CA in automotive applications?

A: Yes. TPSMB18CA is AEC-Q101 qualified and suitable for automotive use. It provides extended operating temperature range (-65°C to 175°C) and maintains electrical equivalence to the original part.