TLZ18B-GS18 Equivalent & Substitute Parts

Part Overview

The TLZ18B-GS18 is an 18 V, 500 mW Zener diode manufactured by Vishay General Semiconductor - Diodes Division in SOD-80 MiniMELF surface mount packaging. This component is classified as an active product with full RoHS3 compliance and unlimited moisture sensitivity rating. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications across industrial and commercial electronics. Substitute parts are identified to provide design flexibility, inventory alternatives, and supply chain continuity while maintaining electrical and mechanical compatibility.

Substiute Parts

TLZ18B-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1215TLZ18B-GS18 Datasheet

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CLL5248B TR PBFREE

Central Semiconductor CorpIn Stock: 5552CLL5248B TR PBFREE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLZ18B-GS18 is determined by the following critical parameters:

Primary Substitution Criteria:

• Zener voltage: 18 V nominal
• Maximum power dissipation: 500 mW
• Package type: SOD-80 MiniMELF (DO-213AC)
• Mounting technology: Surface mount
• Regulatory compliance: RoHS3 compliant

Secondary Compatibility Factors:

• Operating temperature range (minimum -65°C, maximum ≥175°C)
• Impedance characteristics (Zzt maximum)
• Reverse leakage current specifications
• Forward voltage characteristics

The CLL5248B TR PBFREE meets all primary substitution criteria and operates within an extended temperature range (-65°C to 200°C), providing enhanced thermal performance. Both components share identical nominal Zener voltage, power rating, and package configuration, enabling direct functional substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

TLZ18B-GS18 (Vishay General Semiconductor):

• Primary selection for applications requiring the specified impedance and leakage characteristics
• Active product status with established supply chain
• RoHS3 and REACH compliant for regulated markets
• Suitable for standard industrial temperature range applications (-65°C to 175°C)

CLL5248B TR PBFREE (Central Semiconductor):

• Direct substitute with improved impedance performance (21 Ohms vs. 23 Ohms)
• Lower forward voltage drop (1.25 V vs. 1.5 V at 200 mA) reduces power dissipation in forward-biased conditions
• Extended operating temperature range (-65°C to 200°C) accommodates high-temperature environments
• Active product status with higher inventory availability (5524 Pcs vs. 1160 Pcs)
• RoHS3 and REACH compliant
• Specified tolerance of ±5% provides defined voltage accuracy

Both components are suitable for direct substitution in 18 V, 500 mW Zener diode applications with SOD-80 surface mount packaging. Selection between them depends on specific application requirements regarding impedance, forward voltage characteristics, and operating temperature limits.

Frequently Asked Questions (FAQ)

Q: Can the CLL5248B TR PBFREE replace the TLZ18B-GS18 in existing designs?

A: Yes. Both components share identical nominal Zener voltage (18 V), maximum power rating (500 mW), and SOD-80 surface mount package configuration. The CLL5248B TR PBFREE features lower impedance and forward voltage, making it functionally compatible for direct substitution.

Q: What are the key differences between these two Zener diodes?

A: The primary differences are impedance (21 Ohms vs. 23 Ohms), forward voltage at 200 mA (1.25 V vs. 1.5 V), reverse leakage current specifications, and maximum operating temperature (200°C vs. 175°C). The CLL5248B TR PBFREE also carries a specified tolerance of ±5%.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the TLZ18B-GS18 and CLL5248B TR PBFREE are RoHS3 compliant and REACH unaffected, meeting regulatory requirements for restricted substances in electronics manufacturing.

Q: What is the moisture sensitivity rating for these components?

A: Both components have a Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without moisture control requirements.

Q: Which part should be selected for high-temperature applications?

A: The CLL5248B TR PBFREE supports operation up to 200°C, compared to 175°C for the TLZ18B-GS18. For applications requiring extended temperature performance, the CLL5248B TR PBFREE is the appropriate selection.

Q: Are these components available in other package types?

A: Both components are specified in SOD-80 MiniMELF (DO-213AC) surface mount packaging only, as provided in the technical data.

Q: What is the significance of the ±5% tolerance specification on the CLL5248B TR PBFREE?

A: The ±5% tolerance defines the acceptable variation range of the Zener voltage around the 18 V nominal value. This specification ensures predictable voltage regulation performance within defined limits.