BZX79-B12,113 Equivalent & Substitute Parts

Part Overview

The BZX79-B12,113 is a through-hole Zener diode manufactured by Nexperia USA Inc., rated at 12 V nominal with 400 mW maximum power dissipation and ±2% tolerance. This component is classified as Active and maintains full RoHS3 compliance. The part is packaged in DO-204AH/DO-35 axial configuration with ALF2 supplier device packaging.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range. Alternative sources and packaging variants may be required due to inventory availability, lead time considerations, or design flexibility requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	12	V
Tolerance	±2%	-
Power - Max	400	mW
Impedance (Max)	25	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 8 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature Range	-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-B12,113 are classified into two categories based on electrical and mechanical parameter alignment:

Parametric Equivalents maintain identical specifications across all critical parameters: 12 V nominal Zener voltage, ±2% tolerance, 400 mW maximum power, 25 Ohms maximum impedance, 100 nA reverse leakage current, and -65°C to 200°C operating temperature range. These parts are direct functional replacements with identical electrical performance and thermal characteristics.

Similar Parts share the same 12 V nominal Zener voltage and 25 Ohms impedance but differ in tolerance (±5% versus ±2%), maximum power rating (500 mW versus 400 mW), and forward voltage characteristics. These parts operate within compatible electrical ranges but with relaxed tolerance specifications and increased power capability.

All substitute parts maintain through-hole axial mounting configuration, DO-35 package compatibility, and RoHS3 compliance status.

Parameter Comparison

Parameter	BZX79-B12,113	BZX79-B12,133	BZX79-B12,143	BZX79C12	BZX79C12-T50A
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Taiwan Semiconductor Corporation	onsemi
Voltage - Zener (Nom)	12 V	12 V	12 V	12 V	12 V
Tolerance	±2%	±2%	±2%	±5%	±5%
Power - Max	400 mW	400 mW	400 mW	500 mW	500 mW
Impedance (Max)	25 Ohms	25 Ohms	25 Ohms	25 Ohms	25 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 8 V	100 nA @ 8 V	100 nA @ 8 V	100 nA @ 8 V	100 nA @ 8 V
Operating Temperature Range	-65 to 200°C	-65 to 200°C	-65 to 200°C	-65 to 175°C	-65 to 200°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Parametric Equivalent Selection (BZX79-B12,133 and BZX79-B12,143)

The BZX79-B12,133 and BZX79-B12,143 are direct parametric equivalents to the BZX79-B12,113. Both parts are manufactured by Nexperia USA Inc. and maintain identical electrical specifications: 12 V nominal Zener voltage, ±2% tolerance, 400 mW maximum power dissipation, and -65°C to 200°C operating temperature range. These parts are suitable for direct substitution in applications requiring strict tolerance control and thermal performance matching.

Similar Part Selection (BZX79C12 and BZX79C12-T50A)

The BZX79C12 (Taiwan Semiconductor Corporation) and BZX79C12-T50A (onsemi) are classified as similar parts with relaxed tolerance specifications (±5% versus ±2%) and increased power capability (500 mW versus 400 mW). The BZX79C12-T50A maintains the full -65°C to 200°C operating temperature range, while the BZX79C12 operates to 175°C maximum junction temperature. These parts are suitable for applications where tolerance relaxation and increased power margin are acceptable.

All substitute parts maintain RoHS3 compliance, REACH unaffected status, and through-hole axial package configuration compatible with the original BZX79-B12,113 design.

Frequently Asked Questions (FAQ)

Q: Can BZX79-B12,133 and BZX79-B12,143 be used interchangeably with BZX79-B12,113?

A: Yes. Both parts are parametric equivalents with identical electrical specifications: 12 V nominal Zener voltage, ±2% tolerance, 400 mW maximum power, 25 Ohms impedance, and -65°C to 200°C operating temperature range. The numerical suffix variation (113, 133, 143) indicates different manufacturing date codes or tape reel configurations but does not affect electrical performance.

Q: What are the key differences between the BZX79-B12 series and BZX79C12 series?

A: The primary differences are tolerance and power rating. BZX79-B12 series parts maintain ±2% tolerance and 400 mW power rating, while BZX79C12 series parts have ±5% tolerance and 500 mW power rating. Both series share identical 12 V nominal Zener voltage, 25 Ohms impedance, and 100 nA reverse leakage current specifications.

Q: Is the BZX79C12 suitable for applications requiring ±2% tolerance?

A: No. The BZX79C12 is specified with ±5% tolerance, which exceeds the ±2% tolerance of the BZX79-B12,113. Applications requiring strict ±2% tolerance control must use parametric equivalent parts (BZX79-B12,133 or BZX79-B12,143).

Q: What is the temperature operating range difference between BZX79C12 and BZX79C12-T50A?

A: The BZX79C12 operates from -65°C to 175°C (TJ), while the BZX79C12-T50A operates from -65°C to 200°C. For applications requiring full -65°C to 200°C thermal performance, the BZX79C12-T50A is the appropriate selection.

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

A: Yes. All substitute parts listed (BZX79-B12,133, BZX79-B12,143, BZX79C12, and BZX79C12-T50A) are available in DO-204AH/DO-35 axial through-hole package configuration, maintaining mechanical compatibility with the original BZX79-B12,113 design.

Q: Can BZX79C12-T50A replace BZX79-B12,113 in high-temperature applications?

A: Yes, within the specified operating range. The BZX79C12-T50A maintains -65°C to 200°C operating temperature range identical to the BZX79-B12,113. However, the ±5% tolerance specification must be acceptable for the application design requirements.

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