LC13A Transient Voltage Suppressor (TVS) Diode Equivalent & Substitute Parts

Part Overview

The LC13A is a unidirectional Zener-type transient voltage suppressor manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This through-hole component operates across a junction temperature range of -65°C to 175°C and features a 13V reverse standoff voltage with a 21.5V maximum clamping voltage at peak pulse current. The LC13A is classified as an active product with RoHS non-compliant status and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining compatibility with the application circuit requirements and physical mounting constraints.

Substiute Parts

LC13A

Microchip TechnologyIn Stock: 874LC13A Datasheet

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LCE12A

LittelfuseIn Stock: 2277LCE12A Datasheet

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LCE14A

Littelfuse Inc.In Stock: 1645LCE14A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LC13A are identified based on the following electrical and mechanical criteria:

Primary Substitution Parameters:

• Voltage - Reverse Standoff (Typ): 12V to 14V range
• Voltage - Clamping (Max) @ Ipp: 19.9V to 23.2V range
• Current - Peak Pulse (10/1000µs): 65A to 75A range
• Power - Peak Pulse: 1500W (1.5kW)
• Type: Zener, Unidirectional
• Mounting Type: Through Hole
• Applications: General Purpose

Secondary Compatibility Parameters:

• Operating Temperature Range: Minimum -55°C to 175°C
• Unidirectional Channels: 1
• Power Line Protection: No

The LCE12A and LCE14A are classified as direct substitutes based on overlapping voltage and current specifications within acceptable application tolerances. Both parts maintain the same peak pulse power rating, unidirectional Zener topology, and through-hole mounting configuration. Package variations (DO-201 vs. DO-13) represent physical form factor differences that may require circuit board layout evaluation.

Parameter Comparison

Engineering Selection Recommendations

LC13A (Microchip Technology): The LC13A remains the primary component choice for applications requiring the specified 13V standoff voltage and 21.5V clamping characteristic. This part is active in production with unlimited moisture sensitivity rating. The extended operating temperature range (-65°C to 175°C) provides broader thermal performance compared to substitute options. RoHS non-compliant status requires evaluation against regulatory requirements for the end application.

LCE12A (Littelfuse) - Lower Voltage Alternative: The LCE12A is suitable for applications where a lower standoff voltage (12V) and reduced clamping voltage (19.9V) are acceptable. This part offers higher peak pulse current capability (75A) and ROHS3 compliance. The operating temperature minimum of -55°C is less stringent than the LC13A. Package availability in DO-201, DO-27, and axial configurations provides layout flexibility. Littelfuse LCE series classification indicates active product status.

LCE14A (Littelfuse) - Higher Voltage Alternative: The LCE14A accommodates applications requiring higher standoff voltage (14V) and elevated clamping voltage (23.2V). Peak pulse current is reduced to 65A relative to the LC13A. ROHS3 compliance and active product status are confirmed. Operating temperature range minimum of -55°C applies. DO-201, DO-27, and axial package options are available.

Compliance Considerations: Littelfuse LCE series parts (LCE12A, LCE14A) carry ROHS3 compliance certification, whereas the LC13A is RoHS non-compliant. Applications subject to RoHS directives require substitution with compliant alternatives. REACH status is unaffected for all three parts.

Frequently Asked Questions (FAQ)

Q: Can the LCE12A replace the LC13A in all applications?

A: The LCE12A operates at a lower reverse standoff voltage (12V vs. 13V) and lower clamping voltage (19.9V vs. 21.5V). Substitution is valid only when the protected circuit can tolerate these reduced voltage thresholds. Peak pulse current is higher (75A vs. 70A), providing improved transient energy absorption capability. Package differences (DO-201 vs. DO-13) require circuit board layout verification.

Q: What is the primary difference between LCE12A and LCE14A?

A: The LCE12A and LCE14A differ in voltage ratings. The LCE12A provides 12V standoff and 19.9V clamping, while the LCE14A provides 14V standoff and 23.2V clamping. Peak pulse current differs inversely: LCE12A at 75A and LCE14A at 65A. Both maintain 1500W peak pulse power and ROHS3 compliance. Selection depends on the specific overvoltage protection threshold required by the application circuit.

Q: Are package differences between DO-13 and DO-201 significant for substitution?

A: Yes. The LC13A uses DO-13 (DO-202AA) packaging, while LCE12A and LCE14A use DO-201 (DO-27, Axial) packaging. These represent different physical form factors with distinct lead spacing and mounting hole requirements. Circuit board layout must accommodate the selected package geometry. Mechanical compatibility with existing PCB footprints must be confirmed before substitution.

Q: Does the operating temperature range difference affect substitution suitability?

A: The LC13A operates from -65°C to 175°C, while LCE12A and LCE14A operate from -55°C to 175°C. The LC13A provides extended low-temperature performance. For applications operating below -55°C, the LC13A is required. For applications within the -55°C to 175°C range, either part is acceptable from a thermal perspective.

Q: What is the significance of RoHS compliance status in substitution?

A: The LC13A is RoHS non-compliant, while LCE12A and LCE14A are ROHS3 compliant. Applications subject to RoHS directives (EU 2011/65/EU and amendments) require substitution with compliant parts. Non-regulated applications may use either compliant or non-compliant components. Regulatory requirements for the end product determine whether RoHS compliance is mandatory.

Q: Can clamping voltage differences affect circuit protection performance?

A: Yes. Clamping voltage directly determines the maximum voltage presented to protected circuitry during transient events. The LC13A clamps at 21.5V, LCE12A at 19.9V, and LCE14A at 23.2V. Protected components must tolerate the clamping voltage of the selected TVS diode. Lower clamping voltage (LCE12A) provides tighter protection but requires compatible component ratings. Higher clamping voltage (LCE14A) allows higher transient voltages to reach protected circuitry.