BZX79-C6V8,113 Equivalent & Substitute Parts

Part Overview

The BZX79-C6V8,113 is a through-hole Zener diode manufactured by Nexperia USA Inc., rated at 6.8 V nominal with 400 mW maximum power dissipation and ±5% tolerance. This component is classified as an active product and is RoHS3 compliant. The part is supplied in Cut Tape (CT) packaging with ALF2 supplier device package designation and DO-35 axial configuration.

Equivalent and substitute parts are identified to address inventory availability, packaging format requirements, tolerance specifications, and manufacturing source preferences while maintaining electrical and mechanical compatibility within the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	6.8	V
Tolerance	±5%	—
Power - Max	400	mW
Impedance (Max)	15	Ohms
Current - Reverse Leakage @ Vr	2	µA @ 4 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 200	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the BZX79-C6V8,113 are classified into two categories based on electrical parameter alignment:

Parametric Equivalents maintain all critical electrical specifications: 6.8 V nominal Zener voltage, 400 mW maximum power, ±5% tolerance, 15 Ohms maximum impedance, 2 µA reverse leakage current, and -65°C to 200°C operating temperature range. These parts differ only in packaging format (Bulk versus Cut Tape) or supplier device package designation. Parametric equivalents include BZX79-C6V8,133, BZX79-B6V8,113, BZX79-B6V8,133, and BZX79-B6V8,143.

Direct and Similar Alternatives maintain the 6.8 V nominal Zener voltage and ±5% tolerance but may vary in maximum power rating (500 mW versus 400 mW), forward voltage characteristics, or operating temperature upper limit. These include BZX79C6V8 (Taiwan Semiconductor Corporation, 500 mW), BZX79C6V8-T50A (Fairchild Semiconductor, 500 mW), and 1N753A-1 (Microchip Technology, 6.2 V nominal, 500 mW).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vf (Max) @ If	Temp Range	Packaging	RoHS Status
BZX79-C6V8,113	Nexperia USA Inc.	6.8 V	±5%	400 mW	15 Ω	900 mV @ 10 mA	-65 to 200°C	Cut Tape (CT)	ROHS3 Compliant
BZX79-C6V8,133	Nexperia USA Inc.	6.8 V	±5%	400 mW	15 Ω	900 mV @ 10 mA	-65 to 200°C	Cut Tape (CT)	ROHS3 Compliant
BZX79-B6V8,113	NXP USA Inc.	6.8 V	±2%	400 mW	15 Ω	900 mV @ 10 mA	-65 to 200°C	Bulk	Not specified
BZX79-B6V8,133	Nexperia USA Inc.	6.8 V	±2%	400 mW	15 Ω	900 mV @ 10 mA	-65 to 200°C	Cut Tape (CT)	ROHS3 Compliant
BZX79-B6V8,143	NXP USA Inc.	6.8 V	±2%	400 mW	15 Ω	900 mV @ 10 mA	-65 to 200°C	Bulk	Not specified
BZX79C6V8	Taiwan Semiconductor Corporation	6.8 V	±5%	500 mW	15 Ω	1.5 V @ 100 mA	-65 to 175°C	Tape & Reel (TR)	ROHS3 Compliant
BZX79C6V8-T50A	Fairchild Semiconductor	6.8 V	±5%	500 mW	15 Ω	1.5 V @ 100 mA	-65 to 200°C	Bulk	Not specified
1N753A-1	Microchip Technology	6.2 V	±5%	500 mW	3 Ω	1.1 V @ 200 mA	-65 to 175°C	Bulk	RoHS non-compliant

Engineering Selection Recommendations

Primary Substitutes (Parametric Equivalents):

BZX79-C6V8,133, BZX79-B6V8,113, BZX79-B6V8,133, and BZX79-B6V8,143 are direct parametric equivalents with identical electrical performance to the BZX79-C6V8,113. Selection among these parts depends on packaging requirements and tolerance specifications. The BZX79-B series variants offer tighter ±2% tolerance compared to the ±5% tolerance of the BZX79-C series. All parametric equivalents maintain the 6.8 V nominal voltage, 400 mW power rating, and -65°C to 200°C operating temperature range. Parts designated with B-series tolerance are suitable for applications requiring improved voltage accuracy.

Secondary Alternatives (Higher Power Rating):

BZX79C6V8 (Taiwan Semiconductor Corporation) and BZX79C6V8-T50A (Fairchild Semiconductor) provide 500 mW maximum power dissipation, offering increased thermal margin over the 400 mW main part. Both maintain 6.8 V nominal voltage and ±5% tolerance. The BZX79C6V8-T50A extends the operating temperature range to 200°C, matching the main part specification. These alternatives are suitable for applications where higher power dissipation capability is beneficial.

Compliance Considerations:

BZX79-C6V8,113, BZX79-C6V8,133, BZX79-B6V8,133, and BZX79C6V8 are RoHS3 compliant. The 1N753A-1 (Microchip Technology) is RoHS non-compliant and should be selected only when legacy design requirements mandate this specific part number. The 1N753A-1 also differs in nominal Zener voltage (6.2 V versus 6.8 V) and impedance characteristics (3 Ohms versus 15 Ohms), limiting its suitability as a direct replacement.

Frequently Asked Questions (FAQ)

Q: Can BZX79-B6V8,113 replace BZX79-C6V8,113 in my circuit?

A: Yes. BZX79-B6V8,113 is a parametric equivalent with identical electrical specifications except for tighter tolerance (±2% versus ±5%). The B-series part maintains 6.8 V nominal voltage, 400 mW power rating, 15 Ohms impedance, and -65°C to 200°C operating temperature. The improved tolerance may benefit voltage regulation applications requiring higher accuracy.

Q: What is the difference between Cut Tape (CT) and Bulk packaging?

A: Cut Tape packaging supplies components on continuous tape that is cut to length, suitable for automated assembly processes. Bulk packaging supplies loose components in quantities, typically used for manual assembly or reel winding. Electrical performance is identical; packaging selection depends on assembly methodology and quantity requirements.

Q: Can I use BZX79C6V8 (500 mW) instead of BZX79-C6V8,113 (400 mW)?

A: Yes, with consideration for thermal design. BZX79C6V8 provides higher power dissipation capability (500 mW versus 400 mW) while maintaining 6.8 V nominal voltage and ±5% tolerance. This part is suitable for applications where increased thermal margin is advantageous. Operating temperature range differs slightly (-65°C to 175°C for BZX79C6V8 versus -65°C to 200°C for BZX79-C6V8,113).

Q: Is 1N753A-1 a suitable replacement?

A: 1N753A-1 is not recommended as a direct replacement. Although it shares the DO-35 package and ±5% tolerance, it specifies 6.2 V nominal Zener voltage (not 6.8 V) and 3 Ohms impedance (not 15 Ohms). Additionally, 1N753A-1 is RoHS non-compliant. Use this part only when legacy design requirements explicitly mandate this specific part number.

Q: What does ±2% tolerance mean compared to ±5%?

A: Tolerance specifies the allowable deviation from nominal Zener voltage. ±2% tolerance (BZX79-B series) provides tighter voltage accuracy, with actual Zener voltage ranging from 6.664 V to 6.936 V. ±5% tolerance (BZX79-C series) allows wider deviation, ranging from 6.46 V to 7.14 V. Tighter tolerance is beneficial for precision voltage regulation but may increase component cost.

Q: Can I substitute parts with different impedance values?

A: Impedance affects transient response and noise characteristics. BZX79-C6V8,113 specifies 15 Ohms maximum impedance. 1N753A-1 specifies 3 Ohms impedance, representing a significant difference. Substitution with different impedance values requires circuit analysis to confirm acceptable performance in your specific application.

Q: Are all substitute parts RoHS3 compliant?

A: No. BZX79-C6V8,113, BZX79-C6V8,133, BZX79-B6V8,133, and BZX79C6V8 are RoHS3 compliant. BZX79-B6V8,113, BZX79-B6V8,143, BZX79C6V8-T50A, and 1N753A-1 do not specify RoHS compliance status or are explicitly non-compliant. Verify compliance requirements for your application before selecting substitute parts.

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