SMAZ9V1-13 Equivalent & Substitute Parts

Part Overview

The SMAZ9V1-13 is a 9.1 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 in electronic circuits. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain functional compatibility while meeting current availability and compliance requirements.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	9.1 V
Tolerance	±5%
Power - Max	1 W
Impedance (Max)	4 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 7 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA
Operating Temperature	-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 SMAZ9V1-13 is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 9.1 V nominal
Voltage tolerance: ±5%
Package type: DO-214AC (SMA) surface mount
Operating temperature range: minimum -65°C to 150°C
Moisture sensitivity level: 1 (Unlimited)

Secondary Substitution Criteria:

Power rating: 1 W minimum (higher ratings acceptable for increased thermal margin)
Impedance: 4 Ohms maximum
Reverse leakage current: 5 µA @ 7 V maximum
Forward voltage: 1.2 V @ 200 mA maximum

Substitute parts are grouped into two categories:

Category 1 - Parametric Equivalents (1 W Power Rating): Parts with identical electrical specifications and 1 W power rating. These provide direct functional replacement with no circuit redesign required.

Category 2 - Direct Manufacturer Alternatives (1.5 W Power Rating): Parts with identical zener voltage and tolerance but higher power rating (1.5 W). These provide enhanced thermal performance and are electrically compatible within the specified operating parameters.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Zener (Nom)	Tolerance	Power - Max	Impedance (Max)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature	Package / Case	RoHS Status	Product Status
SMAZ9V1-13	Diodes Incorporated	9.1 V	±5%	1 W	4 Ohms	5 µA @ 7 V	1.2 V @ 200 mA	-65°C ~ 150°C	DO-214AC, SMA	RoHS non-compliant	Discontinued
SMAZ9V1-13-F	Diodes Incorporated	9.1 V	±5%	1 W	4 Ohms	5 µA @ 7 V	1.2 V @ 200 mA	-65°C ~ 150°C	DO-214AC, SMA	ROHS3 Compliant	Active
SMAZ9V1-TP	Micro Commercial Co	9.1 V	±5%	1 W	4 Ohms	5 µA @ 7 V	1.2 V @ 200 mA	-65°C ~ 150°C	DO-214AC, SMA	ROHS3 Compliant	Active
SMAJ4739A-TP	Micro Commercial Co	9.1 V	±5%	1 W	5 Ohms	10 µA @ 7 V	1.2 V @ 100 mA	-65°C ~ 150°C	DO-214AC, SMA	ROHS3 Compliant	Active
1SMA4739_R1_00001	Panjit International Inc.	9.1 V	±5%	1 W	5 Ohms	500 nA @ 7 V	Not specified	-55°C ~ 150°C	DO-214AC, SMA	ROHS3 Compliant	Active
1SMA5924BT3G	onsemi	9.1 V	±5%	1.5 W	4 Ohms	2.5 µA @ 7 V	1.5 V @ 200 mA	-65°C ~ 150°C	DO-214AC, SMA	ROHS3 Compliant	Active
SMAJ5924B-TP	Micro Commercial Co	9.1 V	±5%	1.5 W	4 Ohms	2.5 µA @ 7 V	1.5 V @ 200 mA	-65°C ~ 150°C	DO-214AC, SMA	ROHS3 Compliant	Active

Engineering Selection Recommendations

Primary Selection - SMAZ9V1-13-F (Diodes Incorporated)

The SMAZ9V1-13-F is the direct equivalent of the discontinued SMAZ9V1-13. It maintains identical electrical specifications (9.1 V, 1 W, ±5% tolerance, 4 Ohms impedance) and package configuration. The primary distinction is RoHS3 compliance status and active product availability. This part is recommended for applications requiring exact specification matching and manufacturer continuity. Inventory availability is 30,200 units.

Secondary Selection - SMAZ9V1-TP (Micro Commercial Co)

The SMAZ9V1-TP provides parametric equivalence with identical electrical specifications and operating temperature range. This part is manufactured by Micro Commercial Co and carries ROHS3 compliance. It is suitable for applications where manufacturer flexibility is acceptable. Inventory availability is 6,731 units.

Alternative Selection for Enhanced Thermal Performance - 1SMA5924BT3G (onsemi) or SMAJ5924B-TP (Micro Commercial Co)

Both the 1SMA5924BT3G and SMAJ5924B-TP offer 1.5 W power rating with identical zener voltage and tolerance specifications. These parts are suitable for applications requiring increased thermal margin or operating in higher ambient temperature environments. Both maintain the DO-214AC (SMA) package and ROHS3 compliance. The 1SMA5924BT3G has significantly higher inventory availability (320,400 units).

Consideration - SMAJ4739A-TP (Micro Commercial Co)

The SMAJ4739A-TP meets the primary substitution criteria with 1 W power rating and identical zener voltage. However, it exhibits higher impedance (5 Ohms) and reverse leakage current (10 µA @ 7 V) compared to the original specification. This part is suitable only when the original impedance and leakage specifications are not critical to circuit performance.

Consideration - 1SMA4739_R1_00001 (Panjit International Inc.)

The 1SMA4739_R1_00001 meets the primary substitution criteria with 1 W power rating and identical zener voltage. The operating temperature range is -55°C to 150°C, which is narrower than the original -65°C to 150°C specification. This part is suitable only for applications not requiring operation below -55°C. Forward voltage specification is not provided for this part.

Frequently Asked Questions (FAQ)

Q: Can SMAZ9V1-13-F be used as a direct replacement for SMAZ9V1-13?

A: Yes. The SMAZ9V1-13-F is a parametric equivalent with identical electrical specifications, package type, and operating temperature range. The primary difference is RoHS3 compliance status and active availability. No circuit modifications are required.

Q: What is the difference between 1 W and 1.5 W zener diodes in this voltage class?

A: The power rating indicates maximum continuous power dissipation capability. A 1.5 W part can dissipate 50% more power than a 1 W part while maintaining the same junction temperature. Both maintain identical zener voltage (9.1 V) and tolerance (±5%). Selection between 1 W and 1.5 W depends on circuit power dissipation requirements.

Q: Are all substitute parts in the DO-214AC (SMA) package?

A: Yes. All listed substitute parts use the DO-214AC (SMA) surface mount package, ensuring mechanical and electrical compatibility with the original SMAZ9V1-13 footprint.

Q: What does RoHS3 compliance mean for this component?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials. The original SMAZ9V1-13 is RoHS non-compliant. All active substitute parts listed are ROHS3 compliant.

Q: Can SMAJ4739A-TP be used if impedance specification is not critical?

A: Yes, if circuit design does not require the 4 Ohms maximum impedance specification. The SMAJ4739A-TP has 5 Ohms maximum impedance and higher reverse leakage current (10 µA @ 7 V versus 5 µA @ 7 V). Verify circuit tolerance to these parameter variations before selection.

Q: What is the minimum operating temperature difference between 1SMA4739_R1_00001 and the original part?

A: The 1SMA4739_R1_00001 operates from -55°C to 150°C, compared to the original -65°C to 150°C. This represents a 10°C reduction in minimum operating temperature. This part is suitable only for applications not requiring operation below -55°C.

Q: Which substitute part has the highest inventory availability?

A: The 1SMA5924BT3G (onsemi) has the highest inventory availability at 320,400 units. This part offers 1.5 W power rating with identical zener voltage and tolerance specifications.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All listed substitute parts are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel packaging, suitable for automated assembly processes.

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