BZT52C18LP-TP Equivalent & Substitute Parts

Part Overview

The BZT52C18LP-TP is a Zener diode rated at 18 V nominal with 100 mW maximum power dissipation in a surface mount SOD-882 package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, identifying equivalent substitute parts is necessary for ongoing design support and production continuity.

Substiute Parts

BZT52C18LP-TP

Micro Commercial CoIn Stock: 865BZT52C18LP-TP Datasheet

Current PartRFQ

BZX884-C18,315

Nexperia USA Inc.In Stock: 11784BZX884-C18,315 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZT52C18LP-TP is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Zener voltage nominal rating: 18 V
• Impedance (Max): 45 Ohms
• Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA
• Operating temperature range: -65°C ~ 150°C

Mechanical Compatibility Criteria:

• Mounting type: Surface Mount
• Package / Case: SOD-882

Compliance Criteria:

• RoHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts must satisfy all electrical parameters within the specified tolerances and maintain mechanical compatibility with the SOD-882 package footprint. The BZX884-C18,315 meets these requirements while offering improved power rating and tighter voltage tolerance.

Parameter Comparison

Engineering Selection Recommendations

The BZX884-C18,315 is a direct substitute for the BZT52C18LP-TP based on electrical and mechanical parameter equivalence. The substitute part offers the following advantages:

Product Status: The BZX884-C18,315 is active in production, ensuring long-term availability and supply chain continuity compared to the obsolete BZT52C18LP-TP.

Electrical Performance: Both parts maintain identical nominal zener voltage (18 V), impedance (45 Ohms), and forward voltage characteristics. The BZX884-C18,315 provides tighter voltage tolerance (±5% versus ±6.39%) and lower reverse leakage current (50 nA versus 100 nA @ 12.6 V).

Power Rating: The BZX884-C18,315 supports 250 mW maximum power dissipation, exceeding the 100 mW rating of the BZT52C18LP-TP. This enhanced capability provides design margin without requiring circuit modification.

Compliance: Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity. The BZX884-C18,315 carries AEC-Q100 automotive qualification, indicating enhanced reliability screening.

Package Compatibility: Both parts use the SOD-882 surface mount package, ensuring mechanical and thermal compatibility with existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the BZX884-C18,315 be used as a direct replacement for the BZT52C18LP-TP?

A: Yes. Both parts share identical nominal zener voltage (18 V), impedance (45 Ohms), forward voltage characteristics (900 mV @ 10 mA), and operating temperature range (-65°C ~ 150°C). The SOD-882 package footprint is identical, enabling direct PCB substitution without layout modification.

Q: What are the key differences between these parts?

A: The BZX884-C18,315 offers three improvements: active product status (versus obsolete), tighter voltage tolerance (±5% versus ±6.39%), and higher power rating (250 mW versus 100 mW). Reverse leakage current is also lower (50 nA versus 100 nA @ 12.6 V). These differences favor the substitute part for new designs and production continuity.

Q: Are there package compatibility concerns?

A: No. Both parts use the SOD-882 surface mount package. PCB footprints, solder reflow profiles, and thermal management considerations are identical.

Q: Does the higher power rating of the BZX884-C18,315 affect circuit operation?

A: No. The higher power rating (250 mW versus 100 mW) represents increased thermal capability. In circuits designed for the 100 mW part, the substitute will operate within its specifications with additional thermal margin. No circuit modification is required.

Q: Are both parts RoHS compliant?

A: Yes. Both the BZT52C18LP-TP and BZX884-C18,315 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: What does AEC-Q100 qualification mean for the BZX884-C18,315?

A: AEC-Q100 qualification indicates the part has undergone automotive-grade reliability testing and screening. This certification is not specified for the BZT52C18LP-TP but does not prevent substitution in non-automotive applications.