SMAZ6V8-13 Zener Diode Equivalent & Substitute Parts

Part Overview

The SMAZ6V8-13 is a 6.8 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 procurement requirements.

Key Parameters

Parameter	Value
Voltage - Zener (Nom) (Vz)	6.8 V
Tolerance	±5%
Power - Max	1 W
Impedance (Max) (Zzt)	2 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 4 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

Substitute Part Grouping Explanation

Substitution of the SMAZ6V8-13 is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 6.8 V nominal
Voltage tolerance: ±5%
Power dissipation: minimum 1 W
Package type: DO-214AC (SMA) surface mount
Mounting compatibility: Surface mount technology

Secondary Compatibility Factors:

Impedance (Zzt): maximum 2 Ohms (or equivalent performance)
Reverse leakage current: 5 µA @ 4 V (or lower)
Forward voltage: 1.2 V @ 200 mA (or equivalent)
Operating temperature range: -65°C to 150°C (or wider)

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

Parameter Comparison

Parameter	SMAZ6V8-13	SMAZ6V8-13-F	1SMA4736_R1_00001	SMAJ5921B-TP	SMAZ6V8-TP
Manufacturer	Diodes Incorporated	Diodes Incorporated	Panjit International Inc.	Micro Commercial Co	Micro Commercial Co
Voltage - Zener (Nom) (Vz)	6.8 V	6.8 V	6.8 V	6.8 V	6.8 V
Tolerance	±5%	±5%	±5%	±5%	±5%
Power - Max	1 W	1 W	1 W	1.5 W	1 W
Impedance (Max) (Zzt)	2 Ohms	2 Ohms	3.5 Ohms	2.5 Ohms	2 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 4 V	5 µA @ 4 V	5 µA @ 4 V	2.5 µA @ 5.2 V	5 µA @ 4 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	-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 at DiGi Electronics	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitutes):

SMAZ6V8-13-F and SMAZ6V8-TP are parametric equivalents to the SMAZ6V8-13, offering identical electrical specifications across all critical parameters. Both parts are actively produced and ROHS3 compliant, addressing the discontinuation status of the original part. SMAZ6V8-13-F is supplied by Diodes Incorporated in Cut Tape and Digi-Reel packaging with 30,200 units in stock. SMAZ6V8-TP is supplied by Micro Commercial Co in Cut Tape and Digi-Reel packaging with 7,369 units in stock.

Manufacturer-Recommended Alternatives:

1SMA4736_R1_00001 (Panjit International Inc.) maintains the 6.8 V nominal voltage and ±5% tolerance with identical power rating and reverse leakage specifications. The impedance is specified at 3.5 Ohms (versus 2 Ohms nominal), and the operating temperature range is -55°C to 150°C (versus -65°C to 150°C). This part is ROHS3 compliant with 15,400 units in stock.

SMAJ5921B-TP (Micro Commercial Co) provides enhanced power dissipation at 1.5 W (versus 1 W), maintaining the 6.8 V nominal voltage and ±5% tolerance. The impedance is 2.5 Ohms, and reverse leakage is 2.5 µA @ 5.2 V (improved performance). Forward voltage is specified at 1.5 V @ 200 mA. This part is ROHS3 compliant with 8,406 units in stock.

Compliance Considerations:

All substitute parts are ROHS3 compliant, addressing regulatory requirements that may not be met by the original SMAZ6V8-13 (RoHS non-compliant). All parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can SMAZ6V8-13-F be used as a direct replacement for SMAZ6V8-13?

A: Yes. SMAZ6V8-13-F is a parametric equivalent with identical electrical specifications, including 6.8 V nominal voltage, ±5% tolerance, 1 W power rating, 2 Ohms impedance, and -65°C to 150°C operating temperature range. Both use the DO-214AC (SMA) package. The primary difference is product status (active versus discontinued) and packaging format (Cut Tape & Digi-Reel versus standard).

Q: What is the difference between SMAZ6V8-TP and SMAZ6V8-13-F?

A: Both are parametric equivalents with identical electrical specifications. The primary differences are manufacturer (Micro Commercial Co versus Diodes Incorporated) and packaging supplier designation. SMAZ6V8-TP is supplied in Cut Tape and Digi-Reel format. Both are ROHS3 compliant and actively produced.

Q: Can SMAJ5921B-TP replace SMAZ6V8-13 in all applications?

A: SMAJ5921B-TP is functionally compatible for most applications due to matching 6.8 V nominal voltage and ±5% tolerance. However, it provides enhanced power dissipation (1.5 W versus 1 W) and improved reverse leakage characteristics (2.5 µA @ 5.2 V versus 5 µA @ 4 V). The forward voltage is specified at 1.5 V @ 200 mA (versus 1.2 V @ 200 mA). Applications sensitive to forward voltage drop or impedance characteristics should evaluate this part against specific circuit requirements.

Q: Is 1SMA4736_R1_00001 suitable for applications requiring -65°C operation?

A: 1SMA4736_R1_00001 is specified for -55°C to 150°C operation, which does not cover the full -65°C to 150°C range of the original SMAZ6V8-13. Applications requiring operation below -55°C should use SMAZ6V8-13-F or SMAZ6V8-TP instead.

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

A: Yes. All substitute parts use the DO-214AC (SMA) surface mount package, ensuring mechanical and electrical compatibility with the original SMAZ6V8-13 footprint and PCB layout.

Q: What is the significance of the impedance difference in 1SMA4736_R1_00001?

A: 1SMA4736_R1_00001 specifies a maximum impedance of 3.5 Ohms compared to 2 Ohms for the original part. Impedance affects the dynamic response of the zener diode under transient conditions. Applications with stringent transient response requirements should prioritize parts with lower impedance specifications (2 Ohms or less).

Q: Do all substitute parts meet RoHS compliance requirements?

A: All substitute parts (SMAZ6V8-13-F, 1SMA4736_R1_00001, SMAJ5921B-TP, and SMAZ6V8-TP) are ROHS3 compliant. The original SMAZ6V8-13 is RoHS non-compliant, making substitution necessary for applications subject to RoHS regulations.

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