BZX79-B36,133 Equivalent & Substitute Parts

Part Overview

The BZX79-B36,133 is a Zener diode manufactured by Nexperia USA Inc., rated for 36 V nominal Zener voltage with 400 mW maximum power dissipation. This component operates across a temperature range of -65°C to 200°C and is packaged in a through-hole DO-204AH/DO-35 axial configuration. The part maintains an active product status and is RoHS3 compliant. Substitute parts are identified to address inventory availability, packaging preferences, or supply chain requirements while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	36	V
Tolerance	±2%	—
Power - Max	400	mW
Impedance (Max)	90	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 25.2 V
Voltage - Forward (Max) @ If	900	mV @ 10 mA
Operating Temperature Range	-65 to 200	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—

Substitute Part Grouping Explanation

Substitution of the BZX79-B36,133 is determined by equivalence across the following critical parameters:

Zener Voltage (Vz): 36 V nominal with ±2% tolerance
Power Dissipation: 400 mW maximum
Impedance: 90 Ohms maximum
Reverse Leakage Current: 50 nA @ 25.2 V
Forward Voltage: 900 mV maximum @ 10 mA
Operating Temperature Range: -65°C to 200°C
Package Configuration: DO-204AH/DO-35 axial through-hole
Electrical Classification: Zener diode, ALF2 supplier device package

The substitute part BZX79-B36,143 maintains identical electrical specifications and mechanical form factor. The primary distinction is packaging format (Tape & Box versus Bulk) and manufacturer designation (Nexperia USA Inc. versus NXP Semiconductors), which do not affect functional performance or circuit compatibility.

Parameter Comparison

Parameter	BZX79-B36,133	BZX79-B36,143	Match
Manufacturer	Nexperia USA Inc.	NXP Semiconductors	Related Entity
Voltage - Zener (Nom)	36 V	36 V	✓
Tolerance	±2%	±2%	✓
Power - Max	400 mW	400 mW	✓
Impedance (Max)	90 Ohms	90 Ohms	✓
Current - Reverse Leakage @ Vr	50 nA @ 25.2 V	50 nA @ 25.2 V	✓
Voltage - Forward (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	✓
Operating Temperature Range	-65°C to 200°C	-65°C to 200°C	✓
Mounting Type	Through Hole	Through Hole	✓
Package / Case	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	✓
Supplier Device Package	ALF2	ALF2	✓
Product Status	Active	Active	✓
ECCN	EAR99	EAR99	✓
HTSUS	8541.10.0050	8541.10.0050	✓
Packaging Format	Tape & Box	Bulk	Different

Engineering Selection Recommendations

Both the BZX79-B36,133 and BZX79-B36,143 are active products with identical electrical and mechanical specifications. Selection between these parts is based on the following factors:

BZX79-B36,133 (Nexperia USA Inc., Tape & Box packaging): Suitable for applications requiring organized component handling, automated assembly processes, or smaller quantity requirements. Current inventory: 748 pieces.

BZX79-B36,143 (NXP Semiconductors, Bulk packaging): Suitable for high-volume production environments or applications where bulk component storage is standard practice. Current inventory: 124,893 pieces.

Both parts are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99. The choice between them does not affect circuit performance, thermal characteristics, or regulatory compliance. Selection should be based on procurement requirements, assembly methodology, and inventory management practices.

Frequently Asked Questions (FAQ)

Q: Can BZX79-B36,143 be used as a direct replacement for BZX79-B36,133?

A: Yes. Both parts are electrically and mechanically identical. They share the same Zener voltage (36 V), power rating (400 mW), impedance (90 Ohms), temperature range (-65°C to 200°C), and package configuration (DO-204AH/DO-35 axial through-hole). The only difference is packaging format and manufacturer designation.

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

A: Tape & Box packaging organizes components on carrier tape within a protective box, typically used for automated pick-and-place assembly. Bulk packaging supplies loose components in larger quantities, commonly used in high-volume manufacturing or manual assembly environments. Both formats contain identical components with identical specifications.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts maintain identical compliance status: RoHS3 compliant, REACH unaffected, and EAR99 classification. Both are assigned the same HTSUS code (8541.10.0050).

Q: Does the manufacturer difference (Nexperia USA Inc. versus NXP Semiconductors) affect performance?

A: No. Nexperia USA Inc. is a related entity within the NXP organization. Both manufacturers produce components to identical specifications. The electrical and mechanical characteristics remain unchanged.

Q: What parameters must remain identical for substitution to be valid?

A: Zener voltage (36 V ±2%), power dissipation (400 mW), impedance (90 Ohms maximum), reverse leakage current (50 nA @ 25.2 V), forward voltage (900 mV @ 10 mA), operating temperature range (-65°C to 200°C), and package type (DO-204AH/DO-35 axial through-hole) must all match exactly.

Q: Can these parts be used in circuits designed for different Zener voltages?

A: No. These parts are rated specifically for 36 V Zener voltage. Use in circuits requiring different voltage regulation requires selection of a different Zener diode model with the appropriate voltage rating.

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