BZX79-C9V1,113 Equivalent & Substitute Parts

Part Overview

The BZX79-C9V1,113 is a Zener diode manufactured by Nexperia USA Inc., rated at 9.1 V nominal with 400 mW maximum power dissipation and ±5% tolerance. This through-hole component operates across a temperature range of -65°C to 200°C and is packaged in the DO-204AH (DO-35) axial configuration. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Alternative equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity for applications requiring 9.1 V Zener regulation.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	9.1 V
Tolerance	±5%
Power - Max	400 mW
Impedance (Max)	15 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 6 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-65°C ~ 200°C
Mounting Type	Through Hole
Package / Case	DO-204AH, DO-35, Axial
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the BZX79-C9V1,113 is determined by the following critical parameters: nominal Zener voltage (9.1 V), maximum power dissipation (400 mW), tolerance specification (±5%), impedance (15 Ohms maximum), reverse leakage current (500 nA @ 6 V), forward voltage characteristics (900 mV @ 10 mA), operating temperature range (-65°C to 200°C), and through-hole axial package configuration (DO-35/DO-204AH).

Substitute parts are classified into two categories:

Parametric Equivalents maintain all critical electrical specifications and package requirements, differing only in tolerance grade or packaging variant (Cut Tape versus Bulk). These parts are direct functional replacements.

Similar Parts share the nominal Zener voltage (9.1 V) and general package type but differ in one or more secondary parameters such as maximum power rating, impedance, reverse leakage current, forward voltage characteristics, or operating temperature range. These parts require circuit-level evaluation for compatibility.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Ir @ Vr	Vf (Max) @ If	Temp Range	Package	Packaging Type	Classification
BZX79-C9V1,113	Nexperia USA Inc.	9.1 V	±5%	400 mW	15 Ohms	500 nA @ 6 V	900 mV @ 10 mA	-65°C ~ 200°C	DO-35	Cut Tape	Main Part
BZX79-B9V1,113	Nexperia USA Inc.	9.1 V	±2%	400 mW	15 Ohms	500 nA @ 6 V	900 mV @ 10 mA	-65°C ~ 200°C	DO-35	Cut Tape	Parametric Equivalent
BZX79-B9V1,133	Nexperia USA Inc.	9.1 V	±2%	400 mW	15 Ohms	500 nA @ 6 V	900 mV @ 10 mA	-65°C ~ 200°C	DO-35	Cut Tape	Parametric Equivalent
BZX79-B9V1,143	NXP Semiconductors	9.1 V	±2%	400 mW	15 Ohms	500 nA @ 6 V	900 mV @ 10 mA	-65°C ~ 200°C	DO-35	Bulk	Parametric Equivalent
BZX79-C9V1,133	Nexperia USA Inc.	9.1 V	±5%	400 mW	15 Ohms	500 nA @ 6 V	900 mV @ 10 mA	-65°C ~ 200°C	DO-35	Cut Tape	Parametric Equivalent
BZX79-C9V1,143	NXP USA Inc.	9.1 V	±5%	400 mW	15 Ohms	500 nA @ 6 V	900 mV @ 10 mA	-65°C ~ 200°C	DO-35	Bulk	Parametric Equivalent
1N961B	Microchip Technology	10 V	±5%	500 mW	8.5 Ohms	10 µA @ 7.6 V	1.1 V @ 200 mA	-65°C ~ 175°C	DO-7	Bulk	Similar Part
BZX79C9V1	Taiwan Semiconductor Corporation	9.1 V	±5%	500 mW	15 Ohms	500 nA @ 6 V	1.5 V @ 100 mA	-65°C ~ 175°C	DO-35	Tape & Reel	Similar Part
BZX79C9V1-T50A	onsemi	9.1 V	±5%	500 mW	15 Ohms	500 nA @ 6 V	1.5 V @ 100 mA	-65°C ~ 200°C	DO-35	Cut Tape	Similar Part

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacements)

The parts BZX79-B9V1,113, BZX79-B9V1,133, BZX79-B9V1,143, BZX79-C9V1,133, and BZX79-C9V1,143 are parametric equivalents of the BZX79-C9V1,113. All maintain identical nominal Zener voltage (9.1 V), maximum power dissipation (400 mW), impedance (15 Ohms), reverse leakage current (500 nA @ 6 V), forward voltage (900 mV @ 10 mA), and operating temperature range (-65°C to 200°C). The BZX79-B series variants offer improved tolerance (±2% versus ±5%), providing tighter voltage regulation for precision applications. All parametric equivalents are ROHS3 compliant and carry unlimited moisture sensitivity rating. Packaging variants (Cut Tape versus Bulk) do not affect electrical performance and are selected based on procurement and assembly requirements.

Similar Parts (Application-Dependent Selection)

The 1N961B (Microchip Technology) differs in nominal Zener voltage (10 V), maximum power (500 mW), impedance (8.5 Ohms), reverse leakage (10 µA @ 7.6 V), and operating temperature ceiling (175°C). This part is suitable only for applications where 10 V regulation is acceptable and the higher reverse leakage does not compromise circuit performance. The part is RoHS non-compliant.

The BZX79C9V1 (Taiwan Semiconductor Corporation) and BZX79C9V1-T50A (onsemi) maintain the 9.1 V nominal voltage and 15 Ohms impedance but feature increased maximum power dissipation (500 mW versus 400 mW). The BZX79C9V1 operates to 175°C maximum, while the BZX79C9V1-T50A extends to 200°C. Both exhibit higher forward voltage characteristics (1.5 V @ 100 mA versus 900 mV @ 10 mA). These parts are suitable for applications requiring higher power handling or extended temperature operation.

Frequently Asked Questions (FAQ)

Q: Can BZX79-B9V1,113 replace BZX79-C9V1,113 in my circuit?

A: Yes. The BZX79-B9V1,113 is a parametric equivalent with identical electrical specifications except for improved tolerance (±2% versus ±5%). This tighter tolerance provides more precise voltage regulation. All other parameters—nominal voltage, power rating, impedance, leakage current, forward voltage, and operating temperature—are identical.

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

A: Cut Tape (CT) packaging supplies components on individual tape segments suitable for automated pick-and-place assembly. Bulk packaging supplies loose components in larger quantities. Electrical performance is identical; packaging selection depends on assembly process and procurement volume requirements.

Q: Can I use 1N961B as a substitute for BZX79-C9V1,113?

A: The 1N961B is not a direct substitute. It features a 10 V nominal Zener voltage compared to 9.1 V, higher power rating (500 mW versus 400 mW), lower impedance (8.5 Ohms versus 15 Ohms), and significantly higher reverse leakage current (10 µA @ 7.6 V versus 500 nA @ 6 V). Circuit-level evaluation is required to determine compatibility. Additionally, the 1N961B is RoHS non-compliant.

Q: What are the key parameters that determine substitutability?

A: The critical parameters are nominal Zener voltage (9.1 V), maximum power dissipation (400 mW), tolerance (±5%), impedance (15 Ohms maximum), reverse leakage current (500 nA @ 6 V), forward voltage (900 mV @ 10 mA), operating temperature range (-65°C to 200°C), and through-hole axial package configuration (DO-35/DO-204AH). Deviations in any of these parameters require circuit verification.

Q: Can BZX79C9V1-T50A replace BZX79-C9V1,113?

A: The BZX79C9V1-T50A shares the 9.1 V nominal voltage and 15 Ohms impedance but differs in maximum power (500 mW versus 400 mW) and forward voltage characteristics (1.5 V @ 100 mA versus 900 mV @ 10 mA). The higher power rating and extended temperature range (-65°C to 200°C) make it suitable for applications requiring greater thermal headroom. Circuit-level evaluation is necessary to confirm compatibility with forward voltage differences.

Q: Are all substitute parts ROHS3 compliant?

A: Most parametric equivalents and similar parts are ROHS3 compliant. The exception is the 1N961B (Microchip Technology), which is RoHS non-compliant. Compliance status must be verified for applications subject to environmental regulations.

Q: What is the significance of the tolerance rating (±2% versus ±5%)?

A: Tolerance specifies the allowable deviation of the actual Zener voltage from the nominal 9.1 V rating. The BZX79-B series (±2%) provides tighter voltage regulation, ensuring the actual voltage remains within a narrower band. The BZX79-C series (±5%) allows greater deviation. Selection depends on circuit requirements for voltage precision.

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