SMBJ45CA-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ45CA-M3/5B 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 is designed for general-purpose transient voltage suppression applications. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters to ensure functional interchangeability in circuit protection applications.

Substiute Parts

SMBJ45CA-M3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 827SMBJ45CA-M3/5B Datasheet

Current PartRFQ

SMBJ45CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 45502SMBJ45CA-E3/52 Datasheet

DirectRFQ

SMBJ45CD-M3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 10104SMBJ45CD-M3/I Datasheet

DirectRFQ

SMBJ45CA

MDDIn Stock: 17275SMBJ45CA Datasheet

DirectRFQ

SMBJ45CA-13-F

Diodes IncorporatedIn Stock: 66074SMBJ45CA-13-F Datasheet

DirectRFQ

SMBJ40CA

MDDIn Stock: 10276SMBJ40CA Datasheet

MFR RecommendedRFQ

SMBJ40CA

MDDIn Stock: 10276SMBJ40CA Datasheet

MFR RecommendedRFQ

SMBJ43CA

MDDIn Stock: 17140SMBJ43CA Datasheet

MFR RecommendedRFQ

SMBJ43CA

MDDIn Stock: 17140SMBJ43CA Datasheet

MFR RecommendedRFQ

SMBJ48CA

MDDIn Stock: 5565SMBJ48CA Datasheet

MFR RecommendedRFQ

SMBJ48CA

MDDIn Stock: 5565SMBJ48CA Datasheet

MFR RecommendedRFQ

SZ1SMB45CAT3G

Littelfuse Inc.In Stock: 5703SZ1SMB45CAT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ45CA-M3/5B are classified into two categories based on electrical parameter compatibility:

Category 1: Direct Electrical Equivalents Parts that maintain identical or near-identical electrical specifications across all critical parameters: Voltage - Reverse Standoff (45V), Voltage - Breakdown (50V minimum), Voltage - Clamping (72.7V maximum), Current - Peak Pulse (8.3A), and Power - Peak Pulse (600W). These parts are functionally interchangeable without circuit redesign.

Category 2: Manufacturer-Recommended Alternatives Parts with different voltage ratings (40V, 43V, or 48V standoff) that serve as substitutes for applications where the exact 45V specification is not critical. These parts maintain the same package format (DO-214AA/SMB) and power rating (600W) but operate at different voltage thresholds.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (No Circuit Modification Required)

SMBJ45CA-E3/52 (Vishay) and SMBJ45CA-13-F (Diodes Incorporated) are direct electrical equivalents to SMBJ45CA-M3/5B. Both maintain identical voltage ratings (45V standoff, 50V breakdown, 72.7V clamping) and current specifications (8.3A peak pulse). All three parts are RoHS3 compliant with MSL 1 rating. SMBJ45CA-E3/52 and SMBJ45CA-13-F differ only in manufacturer and packaging designation but provide equivalent performance.

SMBJ45CD-M3/I (Vishay) operates within acceptable tolerance of the main part. Voltage - Clamping is 71.6V (versus 72.7V) and Current - Peak Pulse is 8.4A (versus 8.3A), representing minor parameter variations within typical component tolerance ranges. This part is suitable for applications where these small deviations are acceptable.

SMBJ45CA (MDD) provides identical electrical specifications to the main part with one operational difference: the temperature range is -50°C to 150°C versus -55°C to 150°C. This part is suitable for applications not requiring the extended low-temperature performance of the original part.

Manufacturer-Recommended Alternatives (Application-Dependent)

SMBJ40CA, SMBJ43CA, and SMBJ48CA are alternative voltage ratings within the SMB TVS diode family. These parts maintain the same 600W power rating and DO-214AA/SMB package format but operate at different voltage thresholds. Selection among these alternatives depends on the specific circuit protection voltage requirement and is not interchangeable with the 45V standoff specification without circuit analysis.

Frequently Asked Questions (FAQ)

Q: Can SMBJ45CA-E3/52 replace SMBJ45CA-M3/5B directly? A: Yes. Both parts share identical electrical specifications: 45V standoff voltage, 50V breakdown voltage, 72.7V clamping voltage, and 8.3A peak pulse current. The difference is packaging designation and manufacturer tape/reel configuration. No circuit modification is required.

Q: What is the difference between SMBJ45CA-M3/5B and SMBJ45CA? A: The primary difference is the operating temperature range. SMBJ45CA-M3/5B operates from -55°C to 150°C, while SMBJ45CA (MDD) operates from -50°C to 150°C. All electrical parameters are identical. Use SMBJ45CA only if the application does not require operation below -50°C.

Q: Is SMBJ45CD-M3/I compatible with SMBJ45CA-M3/5B? A: SMBJ45CD-M3/I is functionally compatible with minor parameter variations. Voltage - Clamping is 71.6V (0.9V lower) and Current - Peak Pulse is 8.4A (0.1A higher). These variations fall within typical component tolerance. Compatibility depends on circuit margin requirements.

Q: Can I use SMBJ40CA, SMBJ43CA, or SMBJ48CA as substitutes? A: These parts are not direct substitutes. They operate at different voltage thresholds (40V, 43V, and 48V standoff respectively) and have different clamping voltages. Use these parts only if your circuit protection requirement specifies a different voltage rating than 45V.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance status of SMBJ45CA-M3/5B.

Q: What package format do these parts use? A: All substitute parts use the DO-214AA (SMB) surface mount package, identical to the main part. This ensures mechanical and thermal compatibility on PCB layouts designed for SMBJ45CA-M3/5B.