SMAJ45CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ45CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This bidirectional Zener diode operates in the DO-214AC (SMA) surface mount package and is rated for 45V reverse standoff voltage with an 80.3V maximum clamping voltage at peak pulse current. The component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters that permit direct functional replacement in circuit applications.

Substiute Parts

SMAJ45CE3/TR13

Microchip TechnologyIn Stock: 1004SMAJ45CE3/TR13 Datasheet

Current PartRFQ

SMAJ45CA

MDDIn Stock: 6423SMAJ45CA Datasheet

SimilarRFQ

SMAJ45CA

MDDIn Stock: 6423SMAJ45CA Datasheet

SimilarRFQ

SMAJ45CA-13-F

Diodes IncorporatedIn Stock: 5136SMAJ45CA-13-F Datasheet

SimilarRFQ

SMAJ45CA-TP

Micro Commercial CoIn Stock: 5938SMAJ45CA-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ45CE3/TR13 are identified based on the following critical parameters that determine functional equivalence:

Matching Criteria:

• Voltage - Reverse Standoff (Typ): 45V
• Voltage - Breakdown (Min): 50V
• Bidirectional Channels: 1
• Type: Zener
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations: Substitute parts may exhibit lower clamping voltage (72.7V versus 80.3V) and reduced peak pulse current (5.5A versus 6.2A) while maintaining the same reverse standoff and breakdown voltage specifications. These variations remain within acceptable substitution parameters for general-purpose transient voltage suppression applications. Operating temperature ranges may differ between manufacturers while maintaining the minimum required upper temperature limit of 150°C.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and full RoHS3 compliance, confirming their suitability for new design implementations and ongoing production support. The SMAJ45CA-13-F (Diodes Incorporated) and SMAJ45CA-TP (Micro Commercial Co) are supplied in Tape & Reel packaging, matching the original SMAJ45CE3/TR13 packaging format and supporting automated assembly processes.

The SMAJ45CA (MDD) variant is available without specified packaging designation but maintains identical electrical specifications to the Diodes Incorporated and Micro Commercial Co alternatives. All substitute parts share the same base product number (SMAJ45) and DO-214AC (SMA) package footprint, ensuring mechanical and electrical compatibility with existing PCB layouts.

Substitute parts exhibit reduced peak pulse current (5.5A versus 6.2A) and lower maximum clamping voltage (72.7V versus 80.3V). These reductions remain within acceptable operational margins for general-purpose transient voltage suppression. Selection between the main part and substitutes should be based on application-specific pulse current requirements and clamping voltage tolerance specifications.

Frequently Asked Questions (FAQ)

Q: Can SMAJ45CA substitute for SMAJ45CE3/TR13 in all applications?

A: The SMAJ45CA maintains identical reverse standoff voltage (45V) and breakdown voltage (50V) specifications. However, the reduced peak pulse current (5.5A versus 6.2A) and lower clamping voltage (72.7V versus 80.3V) require verification against application-specific transient energy requirements. Both parts are suitable for general-purpose overvoltage protection where these reduced ratings remain within design margins.

Q: Are the package dimensions identical between all substitute parts?

A: All parts utilize the DO-214AC (SMA) surface mount package, ensuring identical PCB footprint compatibility. The SMAJ45CE3/TR13, SMAJ45CA-13-F, and SMAJ45CA-TP are supplied in Tape & Reel format, supporting identical automated assembly handling. The SMAJ45CA (MDD) maintains the same package specification without specified tape and reel designation.

Q: What is the difference between operating temperature specifications?

A: The SMAJ45CE3/TR13 specifies -65 to 150°C (TJ), the SMAJ45CA specifies -50 to 150°C (TJ), the SMAJ45CA-13-F specifies -55 to 150°C (TJ), and the SMAJ45CA-TP specifies -55 to 175°C (TA). All parts support the minimum required upper temperature limit of 150°C. The SMAJ45CA-TP offers extended upper temperature capability to 175°C. Selection should be based on specific application temperature requirements.

Q: Are all substitute parts RoHS3 compliant?

A: All identified substitute parts are RoHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the compliance status of the SMAJ45CE3/TR13. The SMAJ45CA-13-F and SMAJ45CA-TP carry REACH Unaffected status, confirming regulatory compliance for European market applications.

Q: What inventory availability exists for substitute parts?

A: The SMAJ45CA (MDD) is available with 6400 pieces in stock. The SMAJ45CA-13-F (Diodes Incorporated) is available with 5100 pieces in stock. The SMAJ45CA-TP (Micro Commercial Co) is available with 5898 pieces in stock. The original SMAJ45CE3/TR13 (Microchip Technology) is available with 950 pieces in stock.