BZX79C7V5 Equivalent & Substitute Parts

Part Overview

The BZX79C7V5 is a Zener diode rated at 7.5 V nominal voltage with 500 mW maximum power dissipation in a DO-35 through-hole package. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical specifications while offering active product status and improved availability.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	7.5	V
Tolerance	±5%	—
Power - Max	500	mW
Impedance (Max)	15	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 5 V
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 100 mA
Operating Temperature	-65 to 200	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—

Substitute Part Grouping Explanation

Substitution of the BZX79C7V5 is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 7.5 V
Tolerance: ±5%
Power - Max: 500 mW
Mounting Type: Through Hole
Package / Case: DO-35 or equivalent axial configuration

Secondary Compatibility Parameters:

Impedance (Max): 15 Ohms or lower
Current - Reverse Leakage @ Vr: 1 µA @ 5 V or lower
Voltage - Forward (Vf) (Max) @ If: 1.5 V @ 100 mA or lower
Operating Temperature Range: -65°C to 200°C or equivalent

Parts are grouped into two categories:

Direct Equivalents: Parts matching all primary criteria with identical or superior secondary parameters. These include BZX79C7V5-T50A from Fairchild Semiconductor.

Similar Substitutes: Parts matching primary voltage and tolerance specifications but with variations in power rating, impedance, or operating temperature. These include 1N5236B, BZX79-C7V5,113, BZX79-C7V5,133, BZX79-C7V5,143, 1N5064, NZX7V5B,133, and NZX7V5C,133.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Ir @ Vr	Vf (Max) @ If	Temp Range	Package	Status
BZX79C7V5	onsemi	7.5 V	±5%	500 mW	15 Ω	1 µA @ 5 V	1.5 V @ 100 mA	-65 to 200°C	DO-35	Obsolete
BZX79C7V5-T50A	Fairchild Semiconductor	7.5 V	±5%	500 mW	15 Ω	1 µA @ 5 V	1.5 V @ 100 mA	-65 to 200°C	DO-35	Active
1N5236B	Microchip Technology	7.5 V	±5%	500 mW	6 Ω	3 µA @ 6 V	1.5 V @ 200 mA	-65 to 175°C	DO-35	Active
1N5064	Microchip Technology	7.5 V	±5%	3 W	2 Ω	300 µA @ 5.7 V	—	-65 to 175°C	Axial	Active
BZX79-C7V5,113	Nexperia USA Inc.	7.5 V	±5%	400 mW	15 Ω	1 µA @ 5 V	900 mV @ 10 mA	-65 to 200°C	ALF2	Active
BZX79-C7V5,133	Nexperia USA Inc.	7.5 V	±5%	400 mW	15 Ω	1 µA @ 5 V	900 mV @ 10 mA	-65 to 200°C	ALF2	Active
BZX79-C7V5,143	NXP USA Inc.	7.5 V	±5%	400 mW	15 Ω	1 µA @ 5 V	900 mV @ 10 mA	-65 to 200°C	ALF2	Active
NZX7V5B,133	Nexperia USA Inc.	7.4 V	±2%	500 mW	15 Ω	1 µA @ 5 V	1.5 V @ 200 mA	-55 to 175°C	ALF2	Active
NZX7V5C,133	Nexperia USA Inc.	7.5 V	±2%	500 mW	15 Ω	1 µA @ 5 V	1.5 V @ 200 mA	-55 to 175°C	ALF2	Active

Engineering Selection Recommendations

Direct Equivalent Selection:

BZX79C7V5-T50A from Fairchild Semiconductor is the primary direct equivalent. This part maintains identical electrical specifications across all critical parameters and operates over the full temperature range of -65°C to 200°C. Product status is active with high inventory availability (80,644 units), ensuring supply continuity.

Active Manufacturer Alternatives:

1N5236B from Microchip Technology provides an active alternative with superior impedance characteristics (6 Ω versus 15 Ω). This part is suitable for applications where lower impedance is beneficial. Operating temperature range is -65°C to 175°C, which covers most industrial applications. RoHS non-compliance status should be evaluated against design requirements.

BZX79-C7V5,113, BZX79-C7V5,133, and BZX79-C7V5,143 from Nexperia/NXP are active alternatives with 400 mW power rating. These parts are suitable for applications where the 500 mW rating of the original part provides design margin. All three variants maintain the 7.5 V nominal voltage and ±5% tolerance. RoHS3 compliance is available for BZX79-C7V5,113 and BZX79-C7V5,133.

NZX7V5C,133 from Nexperia USA Inc. offers improved tolerance (±2% versus ±5%) with identical 7.5 V nominal voltage and 500 mW power rating. Operating temperature range is -55°C to 175°C. This part is suitable for applications requiring tighter voltage tolerance specifications.

Higher Power Alternative:

1N5064 from Microchip Technology provides 3 W power dissipation with 7.5 V nominal voltage. This part is suitable for applications requiring higher power handling capability. Package configuration is axial, which differs from the DO-35 standard. Operating temperature range is -65°C to 175°C.

Compliance Considerations:

REACH compliance is unaffected for all listed parts. ECCN classification is EAR99 for all parts. RoHS status varies: BZX79-C7V5,113 and BZX79-C7V5,133 are ROHS3 compliant; 1N5236B is RoHS non-compliant; NZX7V5B,133 and NZX7V5C,133 are ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can BZX79C7V5-T50A be used as a direct replacement for BZX79C7V5?

A: Yes. BZX79C7V5-T50A from Fairchild Semiconductor is a direct equivalent with identical electrical specifications and operating temperature range. Both parts are rated at 7.5 V nominal voltage, 500 mW power dissipation, and ±5% tolerance. The primary difference is product status: BZX79C7V5-T50A is active with high inventory availability.

Q: What is the difference between BZX79-C7V5,113, BZX79-C7V5,133, and BZX79-C7V5,143?

A: These three part numbers represent the same electrical specifications (7.5 V, ±5%, 400 mW) from different manufacturers or distribution channels. BZX79-C7V5,113 and BZX79-C7V5,133 are from Nexperia USA Inc. with ROHS3 compliance. BZX79-C7V5,143 is from NXP USA Inc. The primary difference is the 400 mW power rating versus the original 500 mW specification. These parts are suitable for applications where the lower power rating provides adequate design margin.

Q: Is 1N5236B compatible with BZX79C7V5?

A: 1N5236B from Microchip Technology is compatible for most applications. Both parts share the same 7.5 V nominal voltage, ±5% tolerance, and 500 mW power rating. 1N5236B offers superior impedance (6 Ω versus 15 Ω) and operates over -65°C to 175°C. The part is RoHS non-compliant, which should be evaluated against design requirements.

Q: When should 1N5064 be selected instead of BZX79C7V5?

A: 1N5064 should be selected when the application requires higher power dissipation capability. This part is rated at 3 W versus 500 mW for the original part. Both maintain 7.5 V nominal voltage and ±5% tolerance. 1N5064 uses an axial package configuration rather than DO-35, which affects board layout and assembly considerations. Operating temperature range is -65°C to 175°C.

Q: What is the advantage of NZX7V5C,133 over BZX79C7V5?

A: NZX7V5C,133 from Nexperia USA Inc. provides tighter voltage tolerance (±2% versus ±5%) while maintaining the same 7.5 V nominal voltage and 500 mW power rating. This part is active with ROHS3 compliance. Operating temperature range is -55°C to 175°C, which is suitable for most industrial applications. The tighter tolerance is beneficial for applications requiring precise voltage regulation.

Q: Are all substitute parts available in DO-35 package?

A: No. BZX79C7V5-T50A and 1N5236B are available in DO-35 package. BZX79-C7V5,113, BZX79-C7V5,133, BZX79-C7V5,143, NZX7V5B,133, and NZX7V5C,133 use ALF2 package configuration. 1N5064 uses axial package. Package selection affects board layout, assembly compatibility, and mechanical fit. Verify package compatibility with existing designs before substitution.

Q: What is the operating temperature range difference between substitute parts?

A: BZX79C7V5-T50A maintains the original -65°C to 200°C range. 1N5236B, 1N5064, NZX7V5B,133, and NZX7V5C,133 operate over -65°C to 175°C or -55°C to 175°C. For applications requiring operation above 175°C, BZX79C7V5-T50A is the appropriate selection. For standard industrial applications, the reduced upper temperature limit of alternative parts is typically acceptable.

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

A: 1N5064 has the highest reverse leakage current at 300 µA @ 5.7 V, making it unsuitable for low-leakage applications. BZX79C7V5, BZX79C7V5-T50A, BZX79-C7V5,113, BZX79-C7V5,133, BZX79-C7V5,143, NZX7V5B,133, and NZX7V5C,133 all specify 1 µA @ 5 V. 1N5236B specifies 3 µA @ 6 V. For applications requiring minimal reverse leakage, select parts with 1 µA specification.

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