BZX79-C43,113 Equivalent & Substitute Parts

Part Overview

The BZX79-C43,113 is a Zener diode rated at 43 V nominal voltage with 400 mW maximum power dissipation, manufactured by Nexperia USA Inc. 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 device is ROHS3 compliant and maintains active product status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, packaging preferences, or design flexibility within specified tolerance ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	43	V
Tolerance	±5%	—
Power - Max	400	mW
Impedance (Max)	150	Ohms
Operating Temperature	-65 to 200	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—

Substitute Part Grouping Explanation

Substitution of the BZX79-C43,113 is determined by the following critical parameters: nominal Zener voltage (43 V), maximum power rating, tolerance specification, impedance characteristics, and through-hole mounting compatibility. Substitute parts are grouped into two categories based on electrical equivalence and packaging format.

Parametric Equivalents (Tighter Tolerance): Parts BZX79-B43,113 and BZX79-B43,143 maintain identical 43 V nominal voltage, 400 mW power rating, 150 Ohm impedance, and through-hole axial packaging. These substitutes feature ±2% tolerance, which is tighter than the ±5% specification of the main part. Both are ROHS3 compliant and operate within the same temperature range.

Parametric Equivalents (Same Tolerance): Part BZX79-C43,133 matches the ±5% tolerance of the main part while maintaining 43 V nominal voltage, 400 mW power rating, 150 Ohm impedance, and identical through-hole axial packaging. This part differs only in reverse leakage current specification.

Higher Power Alternatives: Parts 1N5367BRLG and 1N5367BG are higher power variants rated at 5 W with 43 V nominal voltage and ±5% tolerance. These components feature reduced impedance (20 Ohms) and are packaged in T-18 axial format. These alternatives are suitable for applications requiring greater power dissipation capacity while maintaining the same nominal voltage and tolerance.

Parameter Comparison

Parameter	BZX79-C43,113	BZX79-B43,113	BZX79-B43,143	BZX79-C43,133	1N5367BRLG	1N5367BG
Manufacturer	Nexperia USA Inc.	NXP USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	onsemi	onsemi
Voltage - Zener (Nom)	43 V	43 V	43 V	43 V	43 V	43 V
Tolerance	±5%	±2%	±2%	±5%	±5%	±5%
Power - Max	400 mW	400 mW	400 mW	400 mW	5 W	5 W
Impedance (Max)	150 Ohms	150 Ohms	150 Ohms	150 Ohms	20 Ohms	20 Ohms
Operating Temperature	-65 to 200°C	-65 to 200°C	-65 to 200°C	-65 to 200°C	-65 to 200°C	-65 to 200°C
Mounting Type	Through Hole	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	T-18, Axial	T-18, Axial
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Substitution (Same Package, Same Power Rating): Parts BZX79-B43,113, BZX79-B43,143, and BZX79-C43,133 are direct substitutes maintaining the DO-204AH/DO-35 axial package and 400 mW power rating. All substitute parts are ROHS3 compliant and operate within the specified temperature range. BZX79-B43,113 and BZX79-B43,143 offer tighter ±2% tolerance compared to the ±5% specification of the main part. BZX79-C43,133 maintains identical ±5% tolerance with equivalent electrical characteristics.

For Higher Power Applications: Parts 1N5367BRLG and 1N5367BG provide 5 W power dissipation capacity with identical 43 V nominal voltage and ±5% tolerance. These components feature T-18 axial packaging and reduced impedance (20 Ohms). Selection of these higher power variants is appropriate when circuit design requires greater thermal headroom or higher current handling capability. Both variants are ROHS3 compliant.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the main part specification. Moisture sensitivity level (MSL) is rated as 1 (Unlimited) for all Nexperia variants, indicating no moisture sensitivity constraints during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can BZX79-B43,113 or BZX79-B43,143 be used as direct replacements for BZX79-C43,113?

A: Yes. Both parts maintain identical 43 V nominal voltage, 400 mW power rating, 150 Ohm impedance, and DO-204AH/DO-35 axial packaging. The ±2% tolerance of the B-series variants is tighter than the ±5% specification of the C-series main part, making them electrically compatible. Packaging format and mounting type are identical.

Q: What is the difference between BZX79-C43,133 and BZX79-C43,113?

A: Both parts share identical nominal voltage (43 V), tolerance (±5%), power rating (400 mW), impedance (150 Ohms), and packaging (DO-204AH/DO-35 axial). The primary difference is reverse leakage current specification: BZX79-C43,113 specifies 50 nA @ 700 mV, while BZX79-C43,133 specifies 55 µA @ 700 mV. Both are ROHS3 compliant and operate across -65°C to 200°C.

Q: When should 1N5367BRLG or 1N5367BG be selected instead of the main part?

A: The 1N5367 series is selected when circuit design requires 5 W power dissipation capacity instead of 400 mW. These higher power variants maintain 43 V nominal voltage and ±5% tolerance. The T-18 axial package differs from the DO-35 package of the main part. Reduced impedance (20 Ohms versus 150 Ohms) provides improved voltage regulation characteristics at higher current levels.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant. The Nexperia variants (BZX79-B43,113, BZX79-B43,143, BZX79-C43,133) and onsemi variants (1N5367BRLG, 1N5367BG) maintain ROHS3 compliance consistent with the main part specification.

Q: What is the impact of tolerance differences between ±5% and ±2% variants?

A: The ±2% tolerance of BZX79-B43,113 and BZX79-B43,143 provides tighter voltage regulation compared to the ±5% tolerance of the main part. In applications where precise Zener voltage is critical, the B-series variants offer improved performance. Both tolerance grades maintain the same 43 V nominal voltage and are electrically interchangeable within their respective tolerance bands.

Q: Can the 1N5367 series be used in applications designed for the BZX79-C43 series?

A: The 1N5367 series is compatible in applications where the circuit can accommodate the T-18 axial package format and where the higher power rating (5 W) and lower impedance (20 Ohms) do not create design conflicts. The 43 V nominal voltage and ±5% tolerance match the main part specification. Physical package dimensions differ between DO-35 and T-18 formats, requiring verification of board layout compatibility.

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