SMAJ11CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ11CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with an 11V reverse standoff voltage and provides clamping at 20.1V maximum, with a peak pulse current rating of 24.9A. The component is housed in a DO-214AC (SMA) package and is RoHS3 compliant with unlimited moisture sensitivity rating. The product maintains active status in the market. Substitute parts are identified to address inventory availability, alternative sourcing requirements, or specific application constraints while maintaining electrical and mechanical compatibility.

Substiute Parts

SMAJ11CE3/TR13

Microchip TechnologyIn Stock: 1171SMAJ11CE3/TR13 Datasheet

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SMAJ11CA

MDDIn Stock: 50348SMAJ11CA Datasheet

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SMAJ11CA

MDDIn Stock: 50348SMAJ11CA Datasheet

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SMAJ11CA-13-F

Diodes IncorporatedIn Stock: 6589SMAJ11CA-13-F Datasheet

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SMAJ11CA-TP

Micro Commercial CoIn Stock: 5159SMAJ11CA-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ11CE3/TR13 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 11V
• Voltage - Breakdown (Min): 12.2V
• Bidirectional Channels: 1
• Type: Zener
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

• Voltage - Clamping (Max) @ Ipp: Substitute parts rated at 18.2V are acceptable as this represents a lower clamping voltage, providing equivalent or enhanced protection margins
• Current - Peak Pulse (10/1000µs): Substitute parts rated at 22A are acceptable as this meets or exceeds minimum protection requirements
• Power - Peak Pulse: Substitute parts rated at 400W are acceptable as this meets minimum dissipation requirements
• Operating Temperature Range: Substitute parts with temperature ranges of -50°C to 150°C, -55°C to 150°C, or -55°C to 175°C are acceptable as these encompass or extend the original specification

All substitute parts maintain identical electrical classification, package form factor, and regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status and full RoHS3 compliance, ensuring regulatory alignment with the original SMAJ11CE3/TR13 specification. Selection among substitute options should be based on the following criteria:

SMAJ11CA (MDD): This substitute offers the largest available inventory (50,300 pieces) and maintains the core electrical parameters. The operating temperature range of -50°C to 150°C covers standard industrial applications. This option is suitable for general-purpose applications where the lower temperature floor does not conflict with system requirements.

SMAJ11CA-13-F (Diodes Incorporated): This substitute provides an extended lower temperature operating range of -55°C to 150°C, offering improved performance in cold-environment applications. Inventory availability is 6,500 pieces. This option is appropriate for applications requiring enhanced low-temperature performance.

SMAJ11CA-TP (Micro Commercial Co): This substitute provides the widest operating temperature range of -55°C to 175°C, extending the upper temperature limit to 175°C. Inventory availability is 5,083 pieces. This option is appropriate for high-temperature applications or systems with elevated ambient conditions.

All substitute parts exhibit lower clamping voltage (18.2V versus 20.1V) and reduced peak pulse current (22A versus 24.9A) and power dissipation (400W versus 500W) compared to the original part. These differences represent conservative design margins and do not compromise protection functionality in applications designed for the SMAJ11CE3/TR13 specification.

Frequently Asked Questions (FAQ)

Q: Can SMAJ11CA substitute directly for SMAJ11CE3/TR13 in existing designs?

A: Yes. The SMAJ11CA maintains identical reverse standoff voltage (11V), breakdown voltage (12.2V), package form factor (DO-214AC/SMA), and regulatory compliance (RoHS3). The lower clamping voltage (18.2V versus 20.1V) and reduced current rating (22A versus 24.9A) represent acceptable design margins for general-purpose transient suppression applications.

Q: What is the difference between the three substitute parts?

A: The primary differences are operating temperature ranges and manufacturer sourcing. SMAJ11CA (MDD) operates from -50°C to 150°C with highest inventory. SMAJ11CA-13-F (Diodes Incorporated) operates from -55°C to 150°C. SMAJ11CA-TP (Micro Commercial Co) operates from -55°C to 175°C, providing the widest temperature envelope. All other electrical parameters are identical across the three substitutes.

Q: Are all substitute parts in the same package?

A: Yes. All substitute parts use the DO-214AC (SMA) surface-mount package, ensuring mechanical and thermal compatibility with the original SMAJ11CE3/TR13 design. No PCB layout modifications are required.

Q: What is the significance of the lower clamping voltage in substitute parts?

A: The substitute parts clamp at 18.2V maximum compared to 20.1V for the original part. This lower clamping voltage provides tighter voltage regulation and enhanced protection margins. Applications designed for the SMAJ11CE3/TR13 specification will experience improved transient suppression performance with substitute parts.

Q: Do substitute parts meet the same compliance requirements?

A: Yes. All substitute parts are RoHS3 compliant with MSL rating of 1 (Unlimited), matching the original SMAJ11CE3/TR13 specification. REACH and ECCN classifications are identical across all parts.

Q: Which substitute should be selected for high-temperature applications?

A: The SMAJ11CA-TP (Micro Commercial Co) is recommended for high-temperature applications, offering an operating range of -55°C to 175°C, extending 25°C above the original specification's upper limit.

Q: Which substitute offers the best inventory availability?

A: The SMAJ11CA (MDD) provides the highest inventory level at 50,300 pieces, compared to 6,500 pieces for SMAJ11CA-13-F and 5,083 pieces for SMAJ11CA-TP.