TZQ5259B-GS08 Equivalent & Substitute Parts

Part Overview

The TZQ5259B-GS08 is a Zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated at 39 V nominal Zener voltage with 500 mW maximum power dissipation. This component operates across an extended temperature range of -65°C to 175°C and is qualified to AEC-Q101 automotive standards. The device is packaged in SOD-80 QuadroMELF surface mount configuration and maintains ROHS3 compliance with unlimited moisture sensitivity rating (MSL 1).

The TZQ5259B-GS08 is currently in active production status with 935 pieces available in inventory. Equivalent and substitute parts are identified based on matching electrical specifications: 39 V nominal Zener voltage, ±5% tolerance, 500 mW power rating, and surface mount technology. Substitute components may differ in package configuration, impedance characteristics, and operating temperature ranges while maintaining functional equivalence for the primary electrical parameters.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	39	V
Tolerance	±5	%
Power - Max	500	mW
Impedance (Max)	80	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 30 V	nA
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	V
Operating Temperature Range	-65 to 175	°C
Mounting Type	Surface Mount	—
Package / Case	SOD-80 QuadroMELF	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
MSL	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TZQ5259B-GS08 is determined by strict equivalence of the following electrical parameters: nominal Zener voltage of 39 V, tolerance of ±5%, and maximum power dissipation of 500 mW. All identified substitute parts maintain these core specifications. Surface mount mounting type is required for direct substitution in existing PCB layouts.

Secondary parameters that may vary between the main part and substitutes include impedance (Zzt), reverse leakage current characteristics, forward voltage specifications, maximum operating temperature, and physical package configuration. These variations do not affect the primary Zener regulation function but may influence circuit performance in specific applications.

The substitute parts identified are:

BZV55-C39,115 (NXP Semiconductors) — Maintains 39 V / 500 mW specifications with MINI-MELF package option
CMHZ5259B TR PBFREE (Central Semiconductor Corp) — Maintains 39 V / 500 mW specifications with SOD-123 package configuration

Parameter Comparison

Parameter	TZQ5259B-GS08 (Vishay)	BZV55-C39,115 (NXP)	CMHZ5259B TR PBFREE (Central Semiconductor)
Voltage - Zener (Nom)	39 V	39 V	39 V
Tolerance	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW
Impedance (Max)	80 Ohms	130 Ohms	80 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 30 V	50 nA @ 27.3 V	100 nA @ 30 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature Range	-65 to 175°C	-65 to 200°C	-65 to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-80 QuadroMELF	DO-213AC, MINI-MELF, SOD-80	SOD-123
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

TZQ5259B-GS08 (Vishay General Semiconductor) is the primary component specification. This part carries AEC-Q101 automotive qualification and is rated for automotive-grade applications. It maintains ROHS3 compliance and operates across -65°C to 175°C. Current inventory status shows 935 pieces available.

BZV55-C39,115 (NXP Semiconductors) provides electrical equivalence with identical 39 V / 500 mW specifications. This substitute extends the maximum operating temperature to 200°C, which may be advantageous in high-temperature environments. The impedance specification is higher at 130 Ohms compared to 80 Ohms in the primary part. Package options include MINI-MELF and SOD-80 configurations. Inventory availability is significantly higher at 837,966 pieces. RoHS compliance status is not specified in the provided data.

CMHZ5259B TR PBFREE (Central Semiconductor Corp) maintains identical electrical specifications to the primary part, including 39 V / 500 mW rating and 80 Ohms impedance. This substitute is packaged in SOD-123 configuration and carries ROHS3 compliance. The maximum operating temperature is limited to 150°C, which is 25°C lower than the primary part. Inventory availability is 3,190 pieces. This part is supplied in Tape & Reel packaging.

Selection between these parts depends on package compatibility with existing PCB layouts, operating temperature requirements, and impedance tolerance in the application circuit. All three parts satisfy the core 39 V / 500 mW Zener diode function.

Frequently Asked Questions (FAQ)

Q: What are the critical electrical parameters that define substitution for the TZQ5259B-GS08?

A: The three critical parameters are nominal Zener voltage (39 V), tolerance (±5%), and maximum power dissipation (500 mW). All identified substitute parts maintain these specifications. Secondary parameters such as impedance, reverse leakage current, and forward voltage may vary.

Q: Can the BZV55-C39,115 be used as a direct replacement in the same PCB footprint?

A: The BZV55-C39,115 is available in multiple package options including SOD-80, which matches the primary part's footprint. However, it is also available in MINI-MELF and DO-213AC configurations. Verify the specific package variant selected matches the PCB layout requirements.

Q: What is the difference in impedance between the primary part and the NXP substitute?

A: The TZQ5259B-GS08 specifies 80 Ohms maximum impedance, while the BZV55-C39,115 specifies 130 Ohms maximum impedance. This difference may affect circuit transient response and noise filtering characteristics in applications sensitive to impedance variation.

Q: Does the CMHZ5259B TR PBFREE have the same operating temperature range as the primary part?

A: No. The CMHZ5259B TR PBFREE operates from -65°C to 150°C, which is 25°C lower than the TZQ5259B-GS08 maximum of 175°C. Applications requiring operation above 150°C must use the primary part or the NXP BZV55-C39,115, which extends to 200°C.

Q: Are all three parts RoHS3 compliant?

A: The TZQ5259B-GS08 and CMHZ5259B TR PBFREE are explicitly specified as ROHS3 compliant. The BZV55-C39,115 RoHS compliance status is not provided in the available data.

Q: What is the difference in reverse leakage current between these parts?

A: The TZQ5259B-GS08 and CMHZ5259B TR PBFREE both specify 100 nA @ 30 V. The BZV55-C39,115 specifies 50 nA @ 27.3 V, indicating lower leakage current. This difference is relevant in applications where leakage current affects circuit performance.

Q: Which substitute part has the highest inventory availability?

A: The BZV55-C39,115 from NXP Semiconductors has the highest inventory with 837,966 pieces available, compared to 3,190 pieces for the CMHZ5259B TR PBFREE and 935 pieces for the primary TZQ5259B-GS08.

Q: Is the automotive qualification (AEC-Q101) maintained across all substitute parts?

A: The TZQ5259B-GS08 carries explicit AEC-Q101 automotive qualification. Automotive qualification status for the BZV55-C39,115 and CMHZ5259B TR PBFREE is not specified in the provided data. Applications requiring automotive-grade components should verify qualification status with the respective manufacturers.

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