BZD27C47P RFG Equivalent & Substitute Parts

Part Overview

The BZD27C47P RFG is a 47 V, 1 W Zener diode manufactured by Taiwan Semiconductor Corporation, designed for surface mount applications in the DO-219AB package. This component is classified as Active and maintains full RoHS3 compliance with unlimited moisture sensitivity rating. Zener diodes of this specification are used in voltage regulation and protection circuits where precise voltage reference and power dissipation capabilities are required. Substitute parts become necessary when addressing supply chain constraints, packaging format requirements, or specific qualification standards such as automotive grade certifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	47	V
Power - Maximum	1	W
Tolerance	±6.38%	-
Impedance (Maximum)	45	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 36 V
Voltage - Forward (Maximum) @ If	1.2	V @ 200 mA
Operating Temperature Range	-55 to 175	°C
Mounting Type	Surface Mount	-
Package / Case	DO-219AB	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the BZD27C47P RFG is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 47 V nominal
Package type: DO-219AB surface mount
Impedance (Maximum): 45 Ohms
Current - Reverse Leakage @ Vr: 1 µA @ 36 V
Voltage - Forward (Maximum) @ If: 1.2 V @ 200 mA
RoHS3 compliance status

Secondary Considerations:

Power rating: The main part specifies 1 W maximum; substitute parts rated at 800 mW operate within acceptable thermal margins for equivalent circuit applications
Operating temperature range: Substitute parts rated to -65°C provide extended low-temperature performance compared to the main part's -55°C minimum
Packaging format: Tape & Reel (TR) packaging of substitutes maintains surface mount compatibility while offering different supply configurations

The three substitute parts (BZD27C47P-E3-08, BZD27C47P-E3-18, and BZD27C47P-HE3-08) all meet the core electrical and mechanical requirements for direct substitution. All substitute parts are manufactured by Vishay General Semiconductor - Diodes Division and maintain identical zener voltage, impedance, leakage current, and forward voltage specifications.

Parameter Comparison

Parameter	BZD27C47P RFG (Main)	BZD27C47P-E3-08	BZD27C47P-E3-18	BZD27C47P-HE3-08
Manufacturer	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Voltage - Zener (Nominal)	47 V	47 V	47 V	47 V
Power - Maximum	1 W	800 mW	800 mW	800 mW
Impedance (Maximum)	45 Ohms	45 Ohms	45 Ohms	45 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 36 V	1 µA @ 36 V	1 µA @ 36 V	1 µA @ 36 V
Voltage - Forward (Maximum) @ If	1.2 V @ 200 mA	1.2 V @ 200 mA	1.2 V @ 200 mA	1.2 V @ 200 mA
Operating Temperature Range	-55°C to 175°C	-65°C to 175°C	-65°C to 175°C	-65°C to 175°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-219AB	DO-219AB	DO-219AB	DO-219AB
Packaging Format	-	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Automotive Grade / AEC-Q101	-	-	-	Automotive / AEC-Q101

Engineering Selection Recommendations

BZD27C47P-E3-08 and BZD27C47P-E3-18 Selection: Both parts are functionally equivalent to the main part BZD27C47P RFG across all critical electrical parameters. The primary distinction is the 200 mW reduction in maximum power rating (800 mW versus 1 W). These substitutes are suitable for applications where the thermal design does not require the full 1 W dissipation capability. Both maintain Active product status and full RoHS3 compliance. The BZD27C47P-E3-18 variant offers significantly higher inventory availability (50,528 pieces) compared to BZD27C47P-E3-08 (6,100 pieces), making it preferable for high-volume procurement scenarios.

BZD27C47P-HE3-08 Selection: This variant is qualified to AEC-Q101 automotive standards and carries an Automotive grade designation. It maintains identical electrical specifications to the other Vishay substitutes while providing enhanced reliability qualification for automotive applications. This part is appropriate for designs requiring automotive-grade component certification. Inventory availability is 30,200 pieces.

Temperature Range Consideration: All substitute parts operate across an extended low-temperature range (-65°C minimum) compared to the main part (-55°C minimum), providing additional margin in cold-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can BZD27C47P-E3-08, BZD27C47P-E3-18, and BZD27C47P-HE3-08 be used interchangeably with BZD27C47P RFG?

A: Yes, all three substitute parts are electrically and mechanically compatible with the BZD27C47P RFG. They share identical zener voltage (47 V), impedance (45 Ohms), leakage current (1 µA @ 36 V), and forward voltage (1.2 V @ 200 mA) specifications. All are packaged in DO-219AB and support surface mount assembly. The primary difference is the 200 mW reduction in maximum power rating (800 mW versus 1 W), which is acceptable for applications not requiring full 1 W dissipation.

Q: What is the difference between BZD27C47P-E3-08 and BZD27C47P-E3-18?

A: Both parts are electrically identical. The designation difference reflects different packaging or supply chain configurations from Vishay. BZD27C47P-E3-18 has substantially higher inventory availability (50,528 pieces versus 6,100 pieces), making it the preferred choice for volume production.

Q: When should BZD27C47P-HE3-08 be selected over the other substitutes?

A: BZD27C47P-HE3-08 is the appropriate choice for designs requiring automotive-grade components. This part carries AEC-Q101 qualification and Automotive grade designation, meeting industry standards for automotive applications. Select this variant when design specifications or customer requirements mandate automotive-qualified components.

Q: Are there any temperature range differences between the main part and substitutes?

A: Yes. The main part BZD27C47P RFG operates from -55°C to 175°C, while all three substitute parts operate from -65°C to 175°C. The substitute parts provide 10°C additional margin at the low-temperature extreme, which may be beneficial in cold-environment applications.

Q: Do all parts maintain the same compliance certifications?

A: Yes. The main part and all substitute parts are RoHS3 compliant, REACH unaffected, and carry unlimited moisture sensitivity rating (MSL 1). All parts share identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications.

Q: What is the significance of the DO-219AB package designation?

A: DO-219AB is the surface mount package standard for these Zener diodes. All parts, including the main part and substitutes, use this identical package, ensuring mechanical and electrical compatibility in PCB layouts and assembly processes.

Q: Can the 800 mW rated substitutes replace the 1 W main part in all applications?

A: The 800 mW substitutes are suitable for applications where the circuit design does not require the full 1 W power dissipation capability. Verify that the thermal design and expected power dissipation in your specific application do not exceed 800 mW. If your application requires sustained operation at or near 1 W dissipation, the main part BZD27C47P RFG is the appropriate choice.

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