1SMA36CAT3 Equivalent & Substitute Parts

Part Overview

The 1SMA36CAT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 36V reverse standoff voltage with a 58.1V maximum clamping voltage and 6.9A peak pulse current capability in a DO-214AC (SMA) package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

1SMA36CAT3

onsemiIn Stock: 7851SMA36CAT3 Datasheet

Current PartRFQ

SMAJ36CA

MDDIn Stock: 25389SMAJ36CA Datasheet

DirectRFQ

SMAJ36CA

MDDIn Stock: 25389SMAJ36CA Datasheet

DirectRFQ

SMAJ33CA

Good-Ark SemiconductorIn Stock: 26961SMAJ33CA Datasheet

SimilarRFQ

SMAJ36CA-13-F

Diodes IncorporatedIn Stock: 8040SMAJ36CA-13-F Datasheet

SimilarRFQ

SMAJ36CA-TP

Micro Commercial CoIn Stock: 40783SMAJ36CA-TP Datasheet

SimilarRFQ

SMAJ36CAE3/TR13

Microchip TechnologyIn Stock: 1114SMAJ36CAE3/TR13 Datasheet

SimilarRFQ

TV04A360JB-G

Comchip TechnologyIn Stock: 737TV04A360JB-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 1SMA36CAT3 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 36V
• Voltage - Clamping (Max) @ Ipp: 58.1V
• Current - Peak Pulse (10/1000µs): 6.9A (minimum acceptable)
• Power - Peak Pulse: 400W (minimum acceptable)
• Package / Case: DO-214AC, SMA
• Bidirectional Channels: 1
• Type: Zener

Substitute parts are classified into two categories:

Direct Equivalents: Parts with identical electrical specifications (36V standoff, 58.1V clamping, 6.9A peak pulse, 400W power rating) and active product status.

Similar Alternatives: Parts with comparable voltage ratings and package compatibility but with variations in peak pulse current or power dissipation that remain within acceptable operating margins for general-purpose applications.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Preferred for Pin-Compatible Replacement):

SMAJ36CA (MDD), SMAJ36CA-13-F (Diodes Incorporated), SMAJ36CA-TP (Micro Commercial Co), and TV04A360JB-G (Comchip Technology) provide identical electrical performance to the 1SMA36CAT3 with 36V standoff voltage, 58.1V clamping voltage, and 6.9A peak pulse current. All substitute parts are active products with ROHS3 compliance, addressing the obsolescence and regulatory status of the original component. These parts are suitable for direct substitution in existing designs.

Enhanced Performance Alternative:

SMAJ36CAE3/TR13 (Microchip Technology) offers superior specifications with 8.6A peak pulse current and 500W power dissipation, providing additional margin for transient protection. This part maintains identical voltage ratings and is recommended for applications requiring enhanced reliability or where thermal margin is a design consideration.

Lower Voltage Alternative:

SMAJ33CA (Good-Ark Semiconductor) operates at 33V reverse standoff with 53.3V clamping voltage. This part is suitable only for applications where the lower voltage rating is acceptable and provides comparable peak pulse current (7.5A) and power dissipation (400W). Use this alternative only when voltage specifications permit.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the 1SMA36CAT3 with SMAJ36CA?

A: Yes. SMAJ36CA provides identical electrical specifications (36V standoff, 58.1V clamping, 6.9A peak pulse) and is pin-compatible in the DO-214AC (SMA) package. The primary difference is product status (active vs. obsolete) and RoHS3 compliance.

Q: What is the difference between SMAJ36CAE3/TR13 and other 36V alternatives?

A: SMAJ36CAE3/TR13 provides higher peak pulse current (8.6A vs. 6.9A) and power dissipation (500W vs. 400W). Voltage ratings remain identical. This part is suitable for applications requiring additional transient protection margin.

Q: Is SMAJ33CA a suitable replacement?

A: SMAJ33CA is a lower voltage alternative with 33V standoff and 53.3V clamping voltage. It is suitable only for applications where the reduced voltage rating does not compromise circuit protection requirements. Verify circuit voltage thresholds before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, addressing the RoHS non-compliant status of the obsolete 1SMA36CAT3.

Q: Do all substitute parts use the same package?

A: Yes. All substitute parts use the DO-214AC (SMA) package, ensuring mechanical and electrical compatibility with existing PCB layouts and footprints.

Q: What is the operating temperature range difference between substitutes?

A: Most substitutes operate from -55°C to 150°C. SMAJ36CA-TP extends to -55°C to 175°C (ambient temperature). SMAJ36CA operates from -50°C to 150°C. Verify application temperature requirements before selection.

Q: Can I use multiple substitute parts interchangeably in the same design?

A: Yes, provided the selected substitute meets the circuit's voltage and current protection requirements. All direct equivalents (SMAJ36CA variants and TV04A360JB-G) are interchangeable. SMAJ36CAE3/TR13 offers enhanced performance and is also interchangeable. SMAJ33CA requires voltage verification before use.