SMAZ15-13 Zener Diode Equivalent & Substitute Parts

Part Overview

The SMAZ15-13 is a 15 V, 1 W surface mount zener diode manufactured by Diodes Incorporated in the DO-214AC (SMA) package. This component is designed for voltage regulation and protection applications requiring a nominal zener voltage of 15 V with ±5% tolerance. The SMAZ15-13 is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements. Suitable alternatives are available from multiple manufacturers with identical or enhanced electrical specifications and active product status.

Substiute Parts

SMAZ15-13

Diodes IncorporatedIn Stock: 15476SMAZ15-13 Datasheet

Current PartRFQ

SMAZ15-13-F

Diodes IncorporatedIn Stock: 42375SMAZ15-13-F Datasheet

DirectRFQ

1SMA4744

Taiwan Semiconductor CorporationIn Stock: 26831SMA4744 Datasheet

MFR RecommendedRFQ

1SMA4744_R1_00001

Panjit International Inc.In Stock: 38851SMA4744_R1_00001 Datasheet

MFR RecommendedRFQ

1SMA5929BT3G

onsemiIn Stock: 954221SMA5929BT3G Datasheet

MFR RecommendedRFQ

SMAJ4744A-TP

Micro Commercial CoIn Stock: 66246SMAJ4744A-TP Datasheet

MFR RecommendedRFQ

SMAJ5929B-TP

Micro Commercial CoIn Stock: 11982SMAJ5929B-TP Datasheet

MFR RecommendedRFQ

SMAZ15-TP

Micro Commercial CoIn Stock: 2508SMAZ15-TP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAZ15-13 are classified based on electrical parameter compatibility and manufacturing status. The primary substitution criteria are:

Critical Parameters for Substitution:

• Voltage - Zener (Nom): 15 V (exact match required)
• Tolerance: ±5% (exact match required)
• Package / Case: DO-214AC, SMA (mechanical compatibility)
• Mounting Type: Surface Mount (assembly compatibility)

Secondary Parameters Allowing Variation:

• Power - Max: 1 W or greater (higher power ratings are acceptable for drop-in replacement)
• Impedance (Max): 10 Ohms or lower (lower impedance acceptable)
• Operating Temperature Range: -65°C to 150°C or equivalent (must cover application requirements)
• RoHS Status: ROHS3 Compliant preferred for new designs

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalent: SMAZ15-13-F (Diodes Incorporated) provides identical electrical specifications with active product status and improved RoHS compliance.

Manufacturer Recommended Equivalents: Parts from Taiwan Semiconductor Corporation (1SMA4744), Panjit International Inc. (1SMA4744_R1_00001), onsemi (1SMA5929BT3G), and Micro Commercial Co (SMAJ4744A-TP, SMAJ5929B-TP) meet or exceed the zener voltage and power specifications while maintaining the DO-214AC (SMA) package format.

Parametric Equivalent: SMAZ15-TP (Micro Commercial Co) provides identical electrical parameters with active product status and RoHS compliance.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement with Identical Specifications:

SMAZ15-13-F (Diodes Incorporated) is the primary recommendation for direct substitution. This part maintains identical electrical parameters to the SMAZ15-13 while offering active product status and ROHS3 compliance. The part is available in Cut Tape and Digi-Reel packaging with 42,300 units in stock.

SMAZ15-TP (Micro Commercial Co) provides an alternative direct replacement with identical electrical specifications, active product status, and ROHS3 compliance. This part is available in Cut Tape and Digi-Reel packaging with 2,400 units in stock.

For Applications Requiring Enhanced Power Dissipation:

1SMA5929BT3G (onsemi) and SMAJ5929B-TP (Micro Commercial Co) offer 1.5 W power ratings compared to the 1 W specification of the SMAZ15-13. Both parts maintain the 15 V zener voltage and ±5% tolerance. These options are suitable for designs requiring additional thermal margin or higher power handling capability. Both are ROHS3 compliant and actively manufactured.

For Applications with Extended Temperature Requirements:

1SMA4744 (Taiwan Semiconductor Corporation) provides an operating temperature range of -55°C to 175°C, extending the upper temperature limit to 175°C compared to the 150°C maximum of the SMAZ15-13. This part offers 1.25 W power rating and is ROHS3 compliant.

For Designs Requiring Lowest Reverse Leakage Current:

1SMA4744_R1_00001 (Panjit International Inc.) specifies reverse leakage current of 100 nA at 11.4 V, significantly lower than the 1 µA specification of the SMAZ15-13. This part is suitable for precision voltage regulation applications where leakage current is a critical parameter.

All recommended substitute parts are ROHS3 compliant, addressing the non-compliant status of the original SMAZ15-13 for new designs subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can SMAZ15-13-F be used as a direct drop-in replacement for SMAZ15-13?

A: Yes. SMAZ15-13-F provides identical electrical specifications including 15 V zener voltage, ±5% tolerance, 1 W power rating, 10 Ohms maximum impedance, and -65°C to 150°C operating temperature range. The DO-214AC (SMA) package is mechanically identical. The primary difference is active product status and ROHS3 compliance.

Q: What is the difference between the 1 W and 1.5 W power-rated alternatives?

A: The 1.5 W alternatives (1SMA5929BT3G and SMAJ5929B-TP) provide greater power dissipation capability. These parts are suitable for applications where the original 1 W specification provides insufficient thermal margin or where circuit design requires higher power handling. The zener voltage and tolerance remain identical at 15 V ±5%.

Q: Are all substitute parts available in the same package format?

A: Yes. All substitute parts listed are available in the DO-214AC (SMA) package format, ensuring mechanical compatibility with existing PCB layouts and assembly processes. Packaging options vary between Cut Tape, Digi-Reel, and Tape & Reel formats depending on the manufacturer and part number.

Q: Which substitute part has the lowest reverse leakage current?

A: The 1SMA4744_R1_00001 (Panjit International Inc.) specifies 100 nanoamperes reverse leakage current at 11.4 V, compared to 1 microampere for the SMAZ15-13. This part is recommended for precision voltage regulation applications where leakage current must be minimized.

Q: Can I use a higher power-rated zener diode as a substitute?

A: Yes. Higher power-rated alternatives such as the 1.5 W options are acceptable substitutes for the 1 W SMAZ15-13 in applications where the zener voltage, tolerance, and package format match. Higher power ratings provide additional thermal margin and do not negatively impact circuit performance in voltage regulation or protection applications.

Q: What is the inventory status of substitute parts?

A: SMAZ15-13-F has 42,300 units in stock. 1SMA5929BT3G has 95,400 units in stock. SMAJ4744A-TP has 66,180 units in stock. SMAJ5929B-TP has 11,873 units in stock. 1SMA4744 has 2,630 units in stock. 1SMA4744_R1_00001 has 3,814 units in stock. SMAZ15-TP has 2,400 units in stock. All parts are listed as new original stock.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant. The original SMAZ15-13 is RoHS non-compliant. For new designs subject to RoHS regulations, any of the listed substitute parts address this compliance requirement.

Q: What is the difference between impedance specifications across substitute parts?

A: The SMAZ15-13 specifies 10 Ohms maximum impedance. Substitute parts specify impedance values ranging from 9 to 14 Ohms. Lower impedance values (9 Ohms) provide improved voltage regulation characteristics. Higher impedance values (14 Ohms) remain within acceptable limits for most voltage regulation and protection applications.