SA14A Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA14A is a unidirectional Zener-type transient voltage suppressor diode manufactured by onsemi, housed in a DO-15 (DO-204AC) axial package. This component is designed for general-purpose transient voltage suppression applications with a 14V reverse standoff voltage and 23.2V maximum clamping voltage at peak pulse current of 21.5A. The SA14A is currently classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	SA14A	—
Manufacturer	onsemi	—
Category	Transient Voltage Suppressors (TVS)	—
Type	Zener	—
Unidirectional Channels	1	—
Voltage - Reverse Standoff (Typ)	14	V
Voltage - Breakdown (Min)	15.6	V
Voltage - Clamping (Max) @ Ipp	23.2	V
Current - Peak Pulse (10/1000µs)	21.5	A
Power - Peak Pulse	500	W
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—
Product Status	Obsolete	—
Applications	General Purpose	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—
REACH Status	REACH Unaffected	—
ECCN	EAR99	—
HTSUS	8541.10.0080	—

Substitute Part Grouping Explanation

Substitution of the SA14A is determined by strict electrical and mechanical parameter matching within the TVS diode category. The following parameters define valid substitution:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 14V
Voltage - Clamping (Max) @ Ipp: 23.2V
Voltage - Breakdown (Min): 15.6V
Current - Peak Pulse (10/1000µs): 21.5A minimum
Power - Peak Pulse: 500W minimum
Mounting Type: Through Hole
Package / Case: DO-15 or equivalent axial package

Substitute parts are grouped into two categories based on package compatibility:

Group 1: DO-15 Package Direct Equivalents Parts maintaining identical DO-15 (DO-204AC) axial packaging with matching electrical specifications: P5KE14A-AP, P5KE14A-BP, P5KE14A-TP, and SA14A-B.

Group 2: Enhanced Performance Alternatives Parts with identical voltage ratings and clamping characteristics but different package formats or higher current ratings: LCE14A (DO-201), SLD14U-017 (P600), and SLD14U-017-B (P600).

Group 3: Adjacent Voltage Rating Alternatives Parts with different reverse standoff voltages but within the same product family: LCE12A (12V) and LCE13A (13V).

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Package	Product Status	Operating Temperature (°C)
SA14A	onsemi	14	23.2	21.5	500	DO-15	Obsolete	—
P5KE14A-AP	Micro Commercial Co	14	23.2	21.5	500	DO-15	Active	-65 to 175
P5KE14A-BP	Micro Commercial Co	14	23.2	21.5	500	DO-15	Active	-65 to 175
P5KE14A-TP	Micro Commercial Co	14	23.2	21.5	500	DO-15	Active	-65 to 175
SA14A-B	Littelfuse Inc.	14	23.2	22	500	DO-15	Active	-55 to 175
LCE14A	Littelfuse Inc.	14	23.2	65	1500	DO-201	Active	-55 to 175
SLD14U-017	Littelfuse Inc.	14	23.2	219.8	5000	P600	Active	-55 to 175
SLD14U-017-B	Littelfuse Inc.	14	14	219.8	5000	P600	Active	-55 to 175
LCE12A	Littelfuse	12	19.9	75	1500	DO-201	Active	-55 to 175
LCE13A	Littelfuse Inc.	13	21.5	70	1500	DO-201	Active	-55 to 175

Engineering Selection Recommendations

Direct Replacement (DO-15 Package): The P5KE14A series (P5KE14A-AP, P5KE14A-BP, P5KE14A-TP) manufactured by Micro Commercial Co provides the most direct electrical and mechanical equivalent to the obsolete SA14A. All three variants maintain identical voltage ratings, clamping characteristics, and peak pulse current specifications within the same DO-15 package format. These parts are currently in active production status with extended operating temperature range (-65°C to 175°C). The SA14A-B from Littelfuse Inc. is also a direct equivalent in DO-15 packaging with active product status and RoHS3 compliance.

Enhanced Performance Alternatives (Same Voltage Rating): For applications requiring higher current handling or power dissipation capacity while maintaining the 14V/23.2V voltage specification, the LCE14A (DO-201 package, 65A, 1.5kW) and SLD14U-017 series (P600 package, 219.8A, 5kW) are available. The SLD14U-017 and SLD14U-017-B variants include AEC-Q101 automotive qualification and are suitable for high-energy transient suppression applications.

Adjacent Voltage Rating Alternatives: The LCE12A (12V standoff) and LCE13A (13V standoff) are available for applications where the exact 14V specification is not critical. These parts offer higher current ratings (75A and 70A respectively) and increased power dissipation (1.5kW) in DO-201 packaging.

Compliance Considerations: All recommended active substitutes maintain REACH Unaffected status and EAR99 ECCN classification consistent with the original SA14A. RoHS3 compliance is confirmed for SA14A-B, P5KE14A series, LCE series, and SLD series variants.

Frequently Asked Questions (FAQ)

Q: Can the P5KE14A series directly replace the SA14A in existing designs? A: Yes. The P5KE14A-AP, P5KE14A-BP, and P5KE14A-TP maintain identical electrical specifications (14V standoff, 23.2V clamping, 21.5A peak pulse) and DO-15 package format. No circuit modifications are required for direct substitution.

Q: What is the difference between P5KE14A-AP, P5KE14A-BP, and P5KE14A-TP? A: These variants differ in packaging format (Bulk designation) but maintain identical electrical and thermal characteristics. Selection depends on procurement and inventory management requirements.

Q: Why would I choose LCE14A or SLD14U-017 over the P5KE14A series? A: LCE14A and SLD14U-017 provide higher current handling capacity (65A and 219.8A respectively) and greater power dissipation (1.5kW and 5kW respectively) while maintaining the same 14V/23.2V voltage specification. These are suitable for applications with higher transient energy levels or where package size permits alternative formats.

Q: Are LCE12A and LCE13A suitable substitutes for SA14A? A: LCE12A and LCE13A have different reverse standoff voltages (12V and 13V respectively) and different clamping voltages (19.9V and 21.5V respectively). These are not direct electrical equivalents and are suitable only for applications where the exact 14V specification is not required.

Q: What is the significance of the SLD14U-017 AEC-Q101 qualification? A: AEC-Q101 qualification indicates the part meets automotive-grade reliability standards. This is relevant only for automotive or high-reliability applications. For general-purpose applications, this qualification is not a requirement.

Q: Can I use SA14A-B as a direct replacement? A: Yes. SA14A-B from Littelfuse Inc. is a direct electrical equivalent in DO-15 packaging with active product status, RoHS3 compliance, and identical voltage and current specifications. Operating temperature range is -55°C to 175°C.

Q: What are the package format differences between DO-15, DO-201, and P600? A: DO-15 and DO-201 are both axial through-hole packages with different physical dimensions. P600 is a larger axial package designed for higher power dissipation applications. Package selection depends on PCB layout constraints and thermal management requirements.

Q: Are all substitute parts REACH compliant? A: Yes. All listed substitute parts maintain REACH Unaffected status consistent with the original SA14A.

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