SMAZ22-13 Zener Diode Equivalent & Substitute Parts

Part Overview

The SMAZ22-13 is a 22 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 precise 22 V zener voltage with ±5% tolerance. The SMAZ22-13 is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility with existing designs.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	22 V
Tolerance	±5%
Power - Max	1 W
Impedance (Max)	15 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 16.7 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA
Operating Temperature Range	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	DO-214AC, SMA
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SMAZ22-13 zener diode is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 22 V nominal
Voltage tolerance: ±5%
Power dissipation: minimum 1 W
Package type: DO-214AC (SMA) surface mount
Operating temperature range: must encompass -65°C to 150°C or be compatible with application requirements
Mounting compatibility: surface mount configuration

Secondary Compatibility Factors:

Impedance (Zzt): maximum 15 Ohms for direct equivalence; higher values acceptable if application permits
Reverse leakage current: 500 nA @ 16.7 V or lower
Forward voltage: 1.2 V @ 200 mA or lower
RoHS compliance status: relevant for new designs and regulatory requirements

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications) and manufacturer-recommended alternatives (compatible with minor parameter variations).

Parameter Comparison

Parameter	SMAZ22-13	SMAZ22-13-F	1SMA4748_R1_00001	SMAJ5933B-TP	SMAZ22-TP
Manufacturer	Diodes Incorporated	Diodes Incorporated	Panjit International Inc.	Micro Commercial Co	Micro Commercial Co
Voltage - Zener (Nom)	22 V	22 V	22 V	22 V	22 V
Tolerance	±5%	±5%	±5%	±5%	±5%
Power - Max	1 W	1 W	1 W	1.5 W	1 W
Impedance (Max)	15 Ohms	15 Ohms	23 Ohms	17.5 Ohms	15 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 16.7 V	500 nA @ 16.7 V	100 nA @ 16.7 V	500 nA @ 16.7 V	500 nA @ 16.7 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA	1.2 V @ 200 mA	Not specified	1.5 V @ 200 mA	1.2 V @ 200 mA
Operating Temperature Range	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	150°C	-65°C ~ 150°C
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Product Status	Discontinued	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents:

SMAZ22-13-F (Diodes Incorporated) and SMAZ22-TP (Micro Commercial Co) are direct parametric equivalents to the SMAZ22-13. Both components maintain identical zener voltage (22 V), tolerance (±5%), power rating (1 W), impedance (15 Ohms), reverse leakage current (500 nA @ 16.7 V), and forward voltage (1.2 V @ 200 mA). Both are active products with ROHS3 compliance, providing superior availability and regulatory alignment compared to the discontinued SMAZ22-13.

Compatible Alternatives with Parameter Variations:

1SMA4748_R1_00001 (Panjit International Inc.) maintains the core electrical specifications (22 V, ±5%, 1 W) but exhibits higher impedance (23 Ohms maximum) and lower reverse leakage current (100 nA @ 16.7 V). The operating temperature range is -55°C to 150°C, which is narrower at the lower bound. This component is suitable for applications where the lower minimum operating temperature of -65°C is not required.

SMAJ5933B-TP (Micro Commercial Co) provides enhanced power dissipation capability (1.5 W versus 1 W) with compatible zener voltage and tolerance specifications. Impedance is 17.5 Ohms and reverse leakage current is 500 nA @ 16.7 V. Forward voltage is specified at 1.5 V @ 200 mA. This component is appropriate for applications requiring higher power handling or where thermal margin is beneficial.

Compliance Considerations:

All substitute parts are ROHS3 compliant and REACH unaffected, providing regulatory compliance for new designs and manufacturing environments with RoHS requirements. The original SMAZ22-13 is RoHS non-compliant; substitution with any listed alternative improves regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can SMAZ22-13-F directly replace SMAZ22-13 in existing designs?

A: Yes. SMAZ22-13-F is a parametric equivalent with identical electrical and mechanical specifications. Both components share the same zener voltage (22 V), tolerance (±5%), power rating (1 W), impedance (15 Ohms), and package type (DO-214AC, SMA). The primary difference is product status: SMAZ22-13-F is active with ROHS3 compliance, while SMAZ22-13 is discontinued and RoHS non-compliant.

Q: What is the difference between SMAZ22-TP and SMAZ22-13-F?

A: Both are parametric equivalents with identical electrical specifications. The primary difference is manufacturer: SMAZ22-TP is manufactured by Micro Commercial Co, while SMAZ22-13-F is manufactured by Diodes Incorporated. Both are active products with ROHS3 compliance and equivalent availability. Selection between these two is based on supply chain preference and inventory availability.

Q: Can SMAJ5933B-TP be used as a substitute for SMAZ22-13?

A: SMAJ5933B-TP is compatible with SMAZ22-13 for most applications. It maintains the same zener voltage (22 V) and tolerance (±5%), but provides higher power dissipation (1.5 W versus 1 W). Impedance is slightly higher at 17.5 Ohms. This component is suitable for applications where additional thermal margin or power handling capability is beneficial or required.

Q: What are the implications of the impedance difference in 1SMA4748_R1_00001?

A: 1SMA4748_R1_00001 has a maximum impedance of 23 Ohms compared to 15 Ohms in SMAZ22-13. Higher impedance results in increased dynamic resistance and may affect voltage regulation performance in applications with varying load currents. This component is suitable for applications where impedance variation is acceptable or where the lower reverse leakage current (100 nA versus 500 nA) provides performance benefits.

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

A: Yes. All substitute parts are packaged in DO-214AC (SMA) surface mount configuration, maintaining mechanical compatibility with SMAZ22-13. Packaging options vary by supplier: SMAZ22-13-F is available in Cut Tape and Digi-Reel; 1SMA4748_R1_00001, SMAJ5933B-TP, and SMAZ22-TP are available in Tape & Reel format. Moisture sensitivity level is 1 (Unlimited) for all components.

Q: What is the operating temperature consideration for 1SMA4748_R1_00001?

A: 1SMA4748_R1_00001 operates from -55°C to 150°C, compared to -65°C to 150°C for SMAZ22-13. The upper temperature limit is identical, but the lower limit is 10°C higher. This component is suitable for applications where the minimum operating temperature does not fall below -55°C. Applications requiring operation at -65°C must use SMAZ22-13-F or SMAZ22-TP.

Q: How does forward voltage affect component selection?

A: Forward voltage specifications are provided for SMAZ22-13, SMAZ22-13-F, SMAJ5933B-TP, and SMAZ22-TP at 1.2 V, 1.2 V, 1.5 V, and 1.2 V respectively at 200 mA. Forward voltage is relevant for reverse-biased operation and does not affect zener regulation performance. SMAJ5933B-TP's higher forward voltage (1.5 V) is acceptable for most applications but should be verified if forward conduction characteristics are critical to circuit design.

Q: What inventory considerations apply to these substitutes?

A: SMAZ22-TP has the highest inventory (30,867 pcs), followed by SMAZ22-13-F (25,400 pcs), 1SMA4748_R1_00001 (6,855 pcs), and SMAJ5933B-TP (857 pcs). For applications requiring immediate availability or large-volume procurement, SMAZ22-TP or SMAZ22-13-F are preferred. SMAJ5933B-TP has limited inventory and should be evaluated for long-term supply chain viability.

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