Equivalent & Substitute Parts for CZ5381B TR

Part Overview

The CZ5381B TR 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 TR 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 TR

Central Semiconductor CorpIn Stock: 1005CZ5381B TR Datasheet

Current PartRFQ

1N5381BRLG

onsemiIn Stock: 13731N5381BRLG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Critical Matching Parameters:

• Voltage - Zener (Nom): 130 V
• Tolerance: ±5%
• Power - Max: 5 W
• Impedance (Max): 190 Ohms
• Current - Reverse Leakage: 500 nA range
• Voltage - Forward (Max): 1.2 V @ 1 A
• Operating Temperature Range: -65°C to 200°C
• Mounting Type: Through Hole
• Package Configuration: Axial

The substitute part 1N5381BRLG manufactured by onsemi meets all specified electrical parameters and maintains axial through-hole form factor 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 TR. 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.

Product Status: The 1N5381BRLG maintains active product status with onsemi, ensuring continued availability, technical support, and supply chain reliability. The CZ5381B TR is obsolete and subject to inventory depletion.

Compliance Posture: The 1N5381BRLG is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement. This provides enhanced compliance documentation for manufacturing and distribution.

Package Compatibility: Both parts utilize axial through-hole configuration, enabling direct mechanical substitution in existing PCB layouts without redesign. The T-18 package designation for the 1N5381BRLG is the industry standard axial package for this device class.

Frequently Asked Questions (FAQ)

Q: Can the 1N5381BRLG be used as a direct replacement for CZ5381B TR in existing designs?

A: Yes. The 1N5381BRLG meets all electrical specifications of the CZ5381B TR, including Zener voltage (130 V), power rating (5 W), tolerance (±5%), and operating temperature range (-65°C to 200°C). Both parts use axial through-hole mounting, enabling direct PCB substitution without circuit modification.

Q: What is the difference between DO-201AA and T-18 package designations?

A: DO-201AA and T-18 are equivalent designations for the same axial through-hole package form factor used in Zener diodes. The 1N5381BRLG uses the T-18 designation, which is the current industry standard nomenclature for this package type. Physical dimensions and lead spacing are identical.

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

A: The 1N5381BRLG is ROHS3 compliant and REACH unaffected. The CZ5381B TR compliance status is not specified in available documentation. For applications requiring documented regulatory compliance, the 1N5381BRLG provides enhanced certification documentation.

Q: What is the reverse leakage current difference at different voltage levels?

A: The CZ5381B TR specifies 500 nA reverse leakage at 99 V, while the 1N5381BRLG specifies 500 nA at 98.8 V. This 0.2 V difference in measurement voltage is negligible for practical circuit applications and does not affect functional equivalence.

Q: Is the 1N5381BRLG available in higher inventory quantities?

A: Yes. The 1N5381BRLG has 1296 pieces in stock as new original inventory, compared to 991 pieces for the obsolete CZ5381B TR. The active product status of the 1N5381BRLG ensures continued replenishment and supply availability.

Q: Can these parts be used interchangeably in voltage regulation and transient protection circuits?

A: Yes. Both parts are functionally equivalent across all electrical parameters required for voltage regulation and transient protection applications. The identical Zener voltage, power dissipation capability, impedance, and temperature range ensure equivalent circuit performance.