SA11CA Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA11CA is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This bidirectional Zener diode operates in the 11V reverse standoff voltage class with an 18.2V maximum clamping voltage and 28A peak pulse current capability. The component is housed in a DO-204AC (DO-15) axial through-hole package and maintains ROHS3 compliance with unlimited moisture sensitivity rating.

Equivalent and substitute parts are necessary when the primary SA11CA becomes unavailable due to inventory constraints, supply chain disruptions, or manufacturing discontinuation, while maintaining electrical and mechanical compatibility within the specified parameter tolerances.

Substiute Parts

SA11CA

Littelfuse Inc.In Stock: 300180SA11CA Datasheet

Current PartRFQ

P6KE13CA

Fairchild SemiconductorIn Stock: 17284P6KE13CA Datasheet

MFR RecommendedRFQ

SA11CA-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 16258SA11CA-E3/54 Datasheet

DirectRFQ

P6KE13CA-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 2805P6KE13CA-E3/54 Datasheet

MFR RecommendedRFQ

P6KE13CA-TP

Micro Commercial CoIn Stock: 4744P6KE13CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA11CA is determined by strict alignment across the following critical parameters:

Voltage Class Compatibility: All substitute parts must maintain a reverse standoff voltage of 11V ± tolerance and a maximum clamping voltage of 18.2V to ensure circuit protection thresholds remain within design specifications.

Current Rating: Substitute parts must support a minimum peak pulse current of 28A at the 10/1000µs pulse duration to handle transient events without exceeding thermal limits.

Power Dissipation: Peak pulse power rating must be at least 500W to safely dissipate energy during transient suppression events.

Package and Mounting: All substitutes must use the DO-204AC (DO-15) axial through-hole package to ensure mechanical and electrical compatibility with existing PCB layouts and soldering processes.

Operating Temperature Range: Substitute parts must support the full operating temperature range of -55°C to 175°C (junction temperature) or equivalent.

Electrical Type: All substitutes must be Zener-type bidirectional TVS diodes with a single channel configuration.

Compliance Status: All substitute parts must maintain active product status and ROHS3 compliance to meet regulatory and procurement requirements.

Parameter Comparison

Engineering Selection Recommendations

SA11CA-E3/54 (Vishay General Semiconductor - Diodes Division): This direct manufacturer equivalent maintains identical voltage specifications (11V reverse standoff, 12.2V breakdown minimum, 18.2V clamping maximum) and equivalent current rating (27.5A peak pulse). The component is packaged in DO-204AC (DO-15) axial format with full operating temperature range (-55°C to 175°C) and ROHS3 compliance. This part is the preferred direct substitute when SA11CA availability is constrained.

P6KE13CA-E3/54 (Vishay General Semiconductor - Diodes Division): This part operates at a slightly elevated reverse standoff voltage (11.1V) and breakdown minimum (12.4V) with enhanced current handling (33A peak pulse) and power dissipation (600W). The component maintains full operating temperature range (-55°C to 175°C), DO-204AC (DO-15) package compatibility, and ROHS3 compliance. This substitute is suitable for applications where the marginal voltage increase is acceptable and enhanced transient current capacity is beneficial.

P6KE13CA-TP (Micro Commercial Co): This variant provides equivalent electrical performance to P6KE13CA-E3/54 with 11.1V reverse standoff, 12.4V breakdown minimum, 33A peak pulse current, and 600W power dissipation. The component is supplied in DO-15 package format with full operating temperature range (-55°C to 175°C) and ROHS3 compliance. This substitute is interchangeable with P6KE13CA-E3/54 and offers alternative sourcing through Micro Commercial Co.

P6KE13CA (Fairchild Semiconductor): This part delivers the highest current rating (34A peak pulse) and power dissipation (600W) among available substitutes with 11.1V reverse standoff and 18.2V clamping voltage. The component is housed in DO-204AC (DO-15) package with operating temperature range of -50°C to 175°C. The lower minimum operating temperature (-50°C versus -55°C) may be a limiting factor in applications requiring full -55°C operation.

Frequently Asked Questions (FAQ)

Q: Can SA11CA-E3/54 be used as a direct replacement for SA11CA?

A: Yes. SA11CA-E3/54 maintains identical voltage specifications (11V reverse standoff, 12.2V breakdown minimum, 18.2V clamping maximum) and equivalent peak pulse current (27.5A). Both components use the DO-204AC (DO-15) axial through-hole package and support the full operating temperature range (-55°C to 175°C). This is the preferred direct substitute.

Q: What is the difference between P6KE13CA variants (standard, -E3/54, -TP)?

A: All P6KE13CA variants share identical electrical specifications: 11.1V reverse standoff, 12.4V breakdown minimum, 18.2V clamping voltage, 33A peak pulse current, and 600W power dissipation. The suffix designations (-E3/54, -TP) indicate different packaging formats and manufacturer sources. P6KE13CA-E3/54 and P6KE13CA-TP are functionally equivalent and interchangeable.

Q: Can I use P6KE13CA parts as substitutes for SA11CA?

A: P6KE13CA parts are electrically compatible substitutes with the following considerations: they operate at a slightly higher reverse standoff voltage (11.1V versus 11V) and breakdown minimum (12.4V versus 12.2V), with enhanced current handling (33A versus 28A) and power dissipation (600W versus 500W). These differences are within acceptable substitution tolerances for general-purpose TVS applications. All variants maintain DO-204AC (DO-15) package compatibility and ROHS3 compliance.

Q: Does the operating temperature range affect substitution eligibility?

A: Operating temperature range is a critical substitution parameter. SA11CA operates from -55°C to 175°C. All recommended substitutes except P6KE13CA (Fairchild) support this full range. P6KE13CA (Fairchild) operates from -50°C to 175°C, which may be unsuitable for applications requiring operation below -50°C.

Q: Are all substitute parts available in the same DO-204AC (DO-15) package?

A: All substitute parts are available in DO-15 axial through-hole package format. SA11CA, SA11CA-E3/54, P6KE13CA, and P6KE13CA-E3/54 are specified as DO-204AC (DO-15). P6KE13CA-TP is specified as DO-15. These designations refer to the same physical package and are mechanically and electrically interchangeable for PCB mounting.

Q: What compliance certifications apply to all substitute parts?

A: All recommended substitute parts maintain ROHS3 compliance and active product status. SA11CA, SA11CA-E3/54, P6KE13CA-E3/54, and P6KE13CA-TP are explicitly ROHS3 compliant. All parts carry EAR99 export classification and HTSUS code 8541.10.0080. Moisture sensitivity level is rated as MSL 1 (Unlimited) for applicable parts.