CZ5388B BK Zener Diode Equivalent & Substitute Parts

Part Overview

The CZ5388B BK is a 200 V, 5 W Zener diode manufactured by Central Semiconductor Corp in a DO-201 through-hole axial package. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The substitute part 1N5388BG, manufactured by onsemi, provides functional equivalence with identical electrical specifications and active product status.

Substiute Parts

CZ5388B BK

Central Semiconductor CorpIn Stock: 1223CZ5388B BK Datasheet

Current PartRFQ

1N5388BG

onsemiIn Stock: 30001N5388BG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CZ5388B BK with the 1N5388BG is based on strict electrical and mechanical parameter matching:

Electrical Equivalence Criteria:

• Zener voltage (Nom): 200 V (identical)
• Tolerance: ±5% (identical)
• Maximum power dissipation: 5 W (identical)
• Impedance (Max): 480 Ohms (identical)
• Reverse leakage current: 500 nA @ 152 V (identical)
• Forward voltage: 1.2 V @ 1 A (identical)
• Operating temperature range: -65°C to 200°C (identical)

Mechanical Compatibility:

• Mounting type: Through Hole (identical)
• Package configuration: Axial (compatible with DO-201 form factor)

The 1N5388BG maintains all critical electrical parameters within specification and uses the same axial through-hole mounting configuration, enabling direct functional substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The 1N5388BG is the direct functional equivalent for the obsolete CZ5388B BK based on the following factors:

Electrical Compatibility: All critical electrical parameters—zener voltage, power rating, impedance, leakage current, and forward voltage—are identical between the two parts. The operating temperature range is also identical, ensuring thermal performance equivalence.

Mechanical Compatibility: Both components use axial through-hole mounting. The 1N5388BG package designation (T-18, Axial) is compatible with the CZ5388B BK's DO-201AA form factor for PCB layout and assembly purposes.

Product Status and Compliance: The 1N5388BG is an active product with ROHS3 compliance and REACH unaffected status, providing long-term availability and regulatory compliance advantages over the obsolete CZ5388B BK.

Procurement Advantage: The 1N5388BG has 2969 units in stock compared to the CZ5388B BK's 1123 units, supporting immediate availability for new designs and production requirements.

Frequently Asked Questions (FAQ)

Q: Can the 1N5388BG directly replace the CZ5388B BK in existing designs?

A: Yes. The 1N5388BG provides direct functional replacement. All electrical parameters—zener voltage (200 V), power rating (5 W), impedance (480 Ohms), leakage current (500 nA @ 152 V), and forward voltage (1.2 V @ 1 A)—are identical. Both components use axial through-hole mounting, enabling direct PCB substitution without circuit modification.

Q: Are there any package differences between these parts?

A: Both components use axial through-hole packages. The CZ5388B BK is specified as DO-201AA/DO-27, while the 1N5388BG is designated T-18 Axial. These designations refer to the same physical form factor and are mechanically compatible for through-hole assembly.

Q: What is the significance of the CZ5388B BK being obsolete?

A: Obsolete status indicates the part is no longer manufactured by Central Semiconductor Corp. The 1N5388BG, classified as active, ensures continued availability, technical support, and compliance with current regulatory standards. Transitioning to the active equivalent part supports long-term supply chain stability.

Q: Are there compliance differences between the two parts?

A: The 1N5388BG is ROHS3 compliant and REACH unaffected. The CZ5388B BK compliance status is not specified in available documentation. For applications requiring regulatory compliance certification, the 1N5388BG provides documented compliance assurance.

Q: What is the inventory status for each part?

A: The CZ5388B BK has 1123 units in stock. The 1N5388BG has 2969 units in stock, providing greater availability for immediate procurement and production scheduling.

Q: Are the electrical specifications guaranteed to be identical?

A: Yes. The zener voltage tolerance (±5%), maximum power dissipation (5 W), impedance (480 Ohms maximum), reverse leakage current (500 nA @ 152 V), forward voltage (1.2 V @ 1 A), and operating temperature range (-65°C to 200°C) are identical between both parts, ensuring equivalent circuit performance.