CZ5381B BK Zener Diode Equivalent & Substitute Parts

Part Overview

The CZ5381B BK is a 130 V, 5 W Zener diode manufactured by Central Semiconductor Corp in DO-201 axial through-hole packaging. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The CZ5381B BK serves as a voltage regulation and transient protection element in electronic circuits requiring 130 V nominal Zener voltage with ±5% tolerance and 5 W maximum power dissipation capability.

Substiute Parts

CZ5381B BK

Central Semiconductor CorpIn Stock: 1213CZ5381B BK Datasheet

Current PartRFQ

1N5381BRLG

onsemiIn Stock: 13731N5381BRLG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete CZ5381B BK is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Zener (Nom) (Vz): 130 V
• Tolerance: ±5%
• Power - Max: 5 W
• Impedance (Max) (Zzt): 190 Ohms
• Current - Reverse Leakage @ Vr: 500 nA (measured at comparable reverse voltage)
• Voltage - Forward (Vf) (Max) @ If: 1.2 V @ 1 A
• Operating Temperature Range: -65°C to 200°C
• Mounting Type: Through Hole
• Package / Case: Axial configuration

The substitute part 1N5381BRLG manufactured by onsemi meets all specified electrical parameters and maintains through-hole axial packaging compatibility. This part is classified as active product status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The 1N5381BRLG from onsemi is the direct functional equivalent for the obsolete CZ5381B BK. Selection of this substitute is based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match exactly, including Zener voltage, tolerance, power rating, impedance, reverse leakage current, and forward voltage characteristics. Operating temperature range is identical across both parts.

Mechanical Compatibility: Both components utilize through-hole axial packaging, ensuring direct PCB footprint compatibility without layout modifications.

Product Status and Supply Continuity: The 1N5381BRLG maintains active product status with onsemi, providing assured long-term availability and supply chain stability compared to the obsolete CZ5381B BK.

Regulatory Compliance: The 1N5381BRLG carries ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. Both parts share identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications.

Frequently Asked Questions (FAQ)

Q: Can the 1N5381BRLG directly replace the CZ5381B BK without circuit modifications?

A: Yes. The 1N5381BRLG meets all specified electrical parameters of the CZ5381B BK, including Zener voltage (130 V), tolerance (±5%), power rating (5 W), impedance (190 Ohms), and operating temperature range (-65°C to 200°C). Both components use through-hole axial packaging, requiring no PCB layout changes.

Q: What is the difference between DO-201AA and T-18 axial packages?

A: Both designations refer to through-hole axial diode packages with identical electrical performance and PCB footprint compatibility. DO-201AA and T-18 are equivalent package specifications for axial-lead components.

Q: Why is the CZ5381B BK classified as obsolete?

A: Obsolete status indicates that Central Semiconductor Corp has discontinued production and support for this part number. The 1N5381BRLG provides equivalent functionality with active manufacturer support from onsemi.

Q: Are there any compliance differences between the two parts?

A: The 1N5381BRLG carries explicit ROHS3 compliance and REACH unaffected certifications. Both parts share identical ECCN and HTSUS classifications, indicating equivalent regulatory treatment for export and trade purposes.

Q: What parameters must remain constant for substitution eligibility?

A: Zener voltage (130 V), tolerance (±5%), power rating (5 W), impedance (190 Ohms), reverse leakage current (500 nA), forward voltage (1.2 V @ 1 A), operating temperature range (-65°C to 200°C), and through-hole axial mounting type must all match exactly for direct substitution.