SA15A-TP Equivalent & Substitute Parts

Part Overview

The SA15A-TP is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection applications. This through-hole component operates across a temperature range of -55°C to 175°C and is RoHS3 compliant. The part is currently active in production with 1064 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this TVS diode category.

Substiute Parts

SA15A-TP

Micro Commercial CoIn Stock: 1148SA15A-TP Datasheet

Current PartRFQ

SA15A

Taiwan Semiconductor CorporationIn Stock: 300129SA15A Datasheet

DirectRFQ

LCE15A

Littelfuse Inc.In Stock: 2372LCE15A Datasheet

SimilarRFQ

P6KE18A

Fairchild SemiconductorIn Stock: 45230P6KE18A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA15A-TP TVS diode is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 15V nominal
• Voltage - Clamping (Max) @ Ipp: 24.4V maximum
• Mounting Type: Through Hole
• Package compatibility: DO-15 or DO-204AC equivalent
• RoHS3 compliance status
• Operating temperature range: minimum -55°C to 175°C

Substitute parts must maintain the same reverse standoff voltage and clamping voltage specifications to ensure proper circuit protection without introducing overvoltage conditions. Peak pulse current and power ratings may vary within acceptable limits for the application, provided the clamping voltage remains within specification. All substitute parts listed are active products with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

SA15A (Direct Substitute): This part from Taiwan Semiconductor Corporation is a direct equivalent with identical voltage specifications (15V standoff, 24.4V clamping) and matching power rating (500W). Package compatibility is confirmed as DO-204AC (DO-15). RoHS3 compliance is verified. This substitute is suitable for one-to-one replacement in existing designs.

LCE15A (Similar Substitute): This Littelfuse part maintains the same voltage specifications but offers higher peak pulse current (61A) and power dissipation (1500W). The package is DO-201AA (DO-27), which differs from the original DO-15. This substitute is applicable in designs where higher current handling is required and the larger package footprint is acceptable. RoHS3 compliance is verified.

P6KE18A (Similar Substitute): This Fairchild Semiconductor part has a slightly elevated clamping voltage (25.2V vs. 24.4V) and higher peak pulse current (25A). The package is DO-204AC (DO-15), maintaining mechanical compatibility. The operating temperature minimum is -50°C, which is 5°C higher than the original specification. RoHS3 compliance status is not specified in the provided data. This substitute is suitable where the marginal voltage increase is acceptable and lower temperature operation is not required.

Frequently Asked Questions (FAQ)

Q: Can SA15A be used as a direct replacement for SA15A-TP?

A: Yes. The SA15A from Taiwan Semiconductor Corporation is a direct substitute with identical reverse standoff voltage (15V), clamping voltage (24.4V), power rating (500W), and package type (DO-204AC/DO-15). Both parts are RoHS3 compliant and active products.

Q: What is the difference between LCE15A and the original SA15A-TP?

A: The LCE15A maintains identical voltage specifications but provides higher peak pulse current (61A vs. 20.9A) and power dissipation (1500W vs. 500W). The package is DO-201AA (DO-27) instead of DO-15, resulting in a larger physical footprint. This substitute is suitable for applications requiring higher transient current handling.

Q: Is P6KE18A compatible with SA15A-TP?

A: The P6KE18A has a clamping voltage of 25.2V, which is 0.8V higher than the SA15A-TP specification of 24.4V. The package type (DO-204AC/DO-15) is compatible. This substitute is acceptable in applications where the marginal voltage increase does not compromise circuit protection requirements. The minimum operating temperature is -50°C versus -55°C for the original part.

Q: What parameters must remain constant for TVS diode substitution?

A: The reverse standoff voltage and clamping voltage are the primary parameters that must remain within specification. Peak pulse current and power ratings may be equal or higher. Package type must be mechanically compatible with the PCB layout. RoHS compliance status should be verified for regulatory requirements.

Q: Can I use a substitute with a different package type?

A: Package compatibility depends on PCB design. DO-15 and DO-204AC are equivalent packages. DO-201AA (DO-27) is physically larger and requires different PCB footprint spacing. Verify mechanical fit before substitution.