BZT52B3V9-G Equivalent & Substitute Parts

Part Overview

The BZT52B3V9-G is an active-status Zener diode manufactured by Taiwan Semiconductor Corporation, designed for small-signal voltage regulation and protection applications. This surface-mount component operates at a nominal Zener voltage of 3.9 V with a maximum power dissipation of 410 mW in the SOD-123 package. The part is ROHS3 compliant and REACH unaffected, making it suitable for modern electronic assemblies. Substitute parts are identified when equivalent electrical characteristics, mechanical packaging, and compliance certifications align with the original specification, enabling seamless integration into existing designs or procurement alternatives.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	3.9	V
Tolerance	±2%	—
Power - Max	410	mW
Impedance (Max)	90	Ohms
Current - Reverse Leakage @ Vr	3	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	SOD-123	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BZT52B3V9-G is determined by strict equivalence across the following critical parameters:

Zener Voltage (Vz): 3.9 V nominal with ±2% tolerance
Power Dissipation: 410 mW maximum
Package Type: SOD-123 surface-mount configuration
Impedance (Zzt): 90 Ohms maximum
Reverse Leakage Current: 3 µA @ 1 V
Forward Voltage: 900 mV maximum @ 10 mA
Temperature Range: -55°C to 150°C (TJ)
Compliance: ROHS3 compliant, REACH unaffected

Substitute parts must match all electrical parameters within specified tolerances and maintain identical mechanical packaging to ensure direct replacement capability without circuit redesign or PCB modification.

Parameter Comparison

Parameter	BZT52B3V9-G	BZT52B3V9-G RHG	Match Status
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Identical
Category	Diodes, Zener	Diodes, Zener	Identical
Voltage - Zener (Nom)	3.9 V	3.9 V	Identical
Tolerance	±2%	±2%	Identical
Power - Max	410 mW	410 mW	Identical
Impedance (Max)	90 Ohms	90 Ohms	Identical
Current - Reverse Leakage @ Vr	3 µA @ 1 V	3 µA @ 1 V	Identical
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	Identical
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	SOD-123	SOD-123	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

The BZT52B3V9-G RHG is a direct parametric equivalent to the BZT52B3V9-G. Both parts are manufactured by Taiwan Semiconductor Corporation and maintain identical electrical specifications, mechanical packaging, and regulatory compliance status. Selection between these parts is based on availability and supply chain requirements rather than technical differentiation.

Both parts are active-status components with ROHS3 compliance and REACH unaffected designation, confirming suitability for current manufacturing standards and environmental regulations. The SOD-123 surface-mount package ensures compatibility with standard PCB assembly processes without requiring design modifications.

Frequently Asked Questions (FAQ)

Q: Can BZT52B3V9-G RHG be used as a direct replacement for BZT52B3V9-G?

A: Yes. Both parts are parametrically identical across all electrical characteristics, operating temperature range, and mechanical packaging. Direct substitution is possible without circuit modification or performance impact.

Q: What does the "RHG" suffix in BZT52B3V9-G RHG indicate?

A: The RHG suffix is a manufacturer designation variant. It does not alter the electrical specifications or functional performance of the component. Both versions maintain identical Zener voltage, power rating, impedance, and temperature operating range.

Q: Are both parts suitable for high-temperature applications?

A: Yes. Both BZT52B3V9-G and BZT52B3V9-G RHG operate across the temperature range of -55°C to 150°C (TJ), enabling deployment in elevated-temperature environments within this specification.

Q: Is the SOD-123 package compatible with automated assembly equipment?

A: Yes. The SOD-123 surface-mount package is a standard configuration supported by modern PCB assembly equipment and reflow soldering processes.

Q: Do both parts meet current environmental compliance requirements?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, confirming compliance with current environmental and hazardous substance regulations.

Q: What is the significance of the ±2% tolerance specification?

A: The ±2% tolerance defines the acceptable deviation range for the nominal 3.9 V Zener voltage. This tolerance ensures predictable voltage regulation performance across the specified operating conditions and component population.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. Identical electrical parameters, package type, and compliance certifications enable direct interchangeability without design revision or performance degradation.

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