TZMB43-GS18 Equivalent & Substitute Parts

Part Overview

The TZMB43-GS18 is an active-status zener diode manufactured by Vishay General Semiconductor - Diodes Division. This component is a 43 V, 500 mW surface mount zener diode in SOD-80 MiniMELF packaging, qualified to AEC-Q101 automotive standards. The part operates across a temperature range of -65°C to 175°C with ±2% voltage tolerance and is RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring 43 V zener diode functionality in surface mount configurations.

Substiute Parts

TZMB43-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1076TZMB43-GS18 Datasheet

Current PartRFQ

CLL5260B TR PBFREE

Central Semiconductor CorpIn Stock: 13115CLL5260B TR PBFREE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TZMB43-GS18 is determined by the following critical parameters:

Primary Substitution Criteria:

• Zener voltage: 43 V nominal
• Power dissipation: 500 mW maximum
• Package type: SOD-80 MiniMELF (DO-213AC)
• Mounting configuration: Surface mount

Secondary Compatibility Parameters:

• Reverse leakage current: 100 nA @ 33 V
• Forward voltage characteristics
• Impedance specifications
• Operating temperature range
• RoHS3 compliance status

The substitute part CLL5260B TR PBFREE meets the primary substitution criteria with identical zener voltage (43 V), power rating (500 mW), and package type (SOD-80). Both parts maintain the same reverse leakage specification and RoHS3 compliance. Variations in tolerance (±5% vs. ±2%), impedance (93 Ohms vs. 90 Ohms), forward voltage (1.25 V vs. 1.5 V @ 200 mA), and maximum operating temperature (200°C vs. 175°C) are within acceptable engineering margins for zener diode applications requiring 43 V regulation.

Parameter Comparison

Engineering Selection Recommendations

TZMB43-GS18 (Vishay General Semiconductor):

• Primary selection for applications requiring AEC-Q101 automotive qualification
• Tighter voltage tolerance (±2%) suitable for precision voltage regulation circuits
• Active product status with established supply chain
• Specified operating temperature to 175°C

CLL5260B TR PBFREE (Central Semiconductor Corp):

• Functionally equivalent substitute for 43 V, 500 mW zener diode applications
• Active product status with higher inventory availability (13,093 pcs vs. 1,049 pcs)
• Extended operating temperature range to 200°C provides thermal margin
• Lower forward voltage (1.25 V vs. 1.5 V) reduces power dissipation in forward-biased conditions
• Wider voltage tolerance (±5%) acceptable for general-purpose voltage regulation
• RoHS3 and REACH compliant, matching regulatory requirements of primary part

Both parts are surface mount SOD-80 MiniMELF devices with identical zener voltage, power rating, reverse leakage, and packaging. Selection between these parts depends on tolerance requirements, thermal operating conditions, and automotive qualification necessity for the specific application.

Frequently Asked Questions (FAQ)

Q: Can CLL5260B TR PBFREE directly replace TZMB43-GS18 in all applications?

A: CLL5260B TR PBFREE is functionally equivalent for 43 V zener diode applications. Both parts share identical zener voltage (43 V), power rating (500 mW), package type (SOD-80), and reverse leakage specifications. Applications requiring AEC-Q101 automotive qualification must use TZMB43-GS18. Applications with tight voltage regulation tolerances (better than ±5%) should use TZMB43-GS18 due to its ±2% tolerance specification.

Q: What are the key differences between these two parts?

A: Primary differences are voltage tolerance (±2% vs. ±5%), impedance (90 Ohms vs. 93 Ohms), forward voltage at 200 mA (1.5 V vs. 1.25 V), and maximum operating temperature (175°C vs. 200°C). The TZMB43-GS18 carries AEC-Q101 automotive qualification; the CLL5260B does not. Both are RoHS3 compliant and REACH unaffected.

Q: Are the packages physically identical?

A: Yes. Both parts use SOD-80 MiniMELF packaging (DO-213AC). Physical dimensions and PCB footprints are identical, allowing direct board-level substitution without layout modifications.

Q: Which part should be selected for automotive applications?

A: TZMB43-GS18 is specified for automotive applications with AEC-Q101 qualification. CLL5260B TR PBFREE does not carry automotive qualification and should not be used in applications requiring AEC-Q101 compliance.

Q: How do the tolerance specifications affect circuit performance?

A: TZMB43-GS18 with ±2% tolerance provides tighter voltage regulation accuracy compared to CLL5260B with ±5% tolerance. For applications requiring precise 43 V regulation, TZMB43-GS18 is the appropriate selection. For general-purpose voltage clamping and regulation with wider tolerance bands, CLL5260B is acceptable.

Q: What is the significance of the lower forward voltage in CLL5260B?

A: CLL5260B exhibits lower forward voltage (1.25 V vs. 1.5 V @ 200 mA), resulting in reduced power dissipation when the diode conducts in forward bias. This characteristic may provide thermal benefits in applications with significant forward current flow, though both parts are rated for identical 500 mW maximum power dissipation.

Q: Are both parts currently in production?

A: Yes. Both TZMB43-GS18 and CLL5260B TR PBFREE are active-status products. CLL5260B has higher inventory availability (13,093 pcs vs. 1,049 pcs), which may influence procurement decisions for high-volume applications.