BZD27C47P RHG Equivalent & Substitute Parts

Part Overview

The BZD27C47P RHG is a 47 V, 1 W Zener diode manufactured by Taiwan Semiconductor Corporation in Surface Mount Sub SMA packaging (DO-219AB). This component is classified as an Active product and is ROHS3 compliant. 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 the primary part experiences supply constraints, extended lead times, or when design requirements permit operation within the electrical and mechanical parameters of alternative qualified sources.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	47	V
Power - Maximum	1	W
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 (TJ)
Mounting Type	Surface Mount	-
Package / Case	DO-219AB	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the BZD27C47P RHG is permissible with parts that maintain electrical equivalence across the following critical parameters:

Zener Voltage (Vz): 47 V nominal specification
Package / Case: DO-219AB Surface Mount configuration
Impedance (Zzt): 45 Ohms maximum
Reverse Leakage Current: 1 µA @ 36 V
Forward Voltage (Vf): 1.2 V @ 200 mA
RoHS Compliance: ROHS3 Compliant status
Moisture Sensitivity: MSL 1 (Unlimited)

The substitute parts identified (BZD27C47P-E3-08, BZD27C47P-E3-18, and BZD27C47P-HE3-08) all meet these electrical and mechanical requirements. The primary distinction among substitutes is power rating and operating temperature range, which are documented in the parameter comparison table below.

Parameter Comparison

Parameter	BZD27C47P RHG (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 (Nom)	47 V	47 V	47 V	47 V
Power - Max	1 W	800 mW	800 mW	800 mW
Impedance (Max)	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 (Vf) (Max) @ If	1.2 V @ 200 mA	1.2 V @ 200 mA	1.2 V @ 200 mA	1.2 V @ 200 mA
Operating Temperature	-55°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C
Package / Case	DO-219AB	DO-219AB	DO-219AB	DO-219AB
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active
Grade	Standard	Standard	Standard	Automotive
Qualification	-	-	-	AEC-Q101

Engineering Selection Recommendations

All substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory and supply chain continuity. The BZD27C47P-E3-08 and BZD27C47P-E3-18 are standard-grade Zener diodes suitable for general industrial applications. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and provide identical electrical performance within the specified parameters.

The BZD27C47P-HE3-08 variant is qualified to AEC-Q101 automotive standards and carries Automotive grade designation. This part is appropriate for applications requiring automotive-level reliability and traceability. The extended lower operating temperature limit (-65°C versus -55°C) provides additional thermal margin in cold-environment applications.

All substitute parts operate at 800 mW maximum power, which is lower than the main part's 1 W rating. Component selection should verify that circuit power dissipation requirements do not exceed 800 mW at the 47 V Zener voltage. The identical impedance, reverse leakage, and forward voltage characteristics ensure functional equivalence in voltage regulation and protection circuit applications.

Frequently Asked Questions (FAQ)

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

A: Yes, within the constraint that circuit power dissipation does not exceed 800 mW. All substitute parts maintain identical Zener voltage (47 V), impedance (45 Ohms), reverse leakage current (1 µA @ 36 V), and forward voltage (1.2 V @ 200 mA) specifications. The DO-219AB package and Surface Mount configuration are identical across all parts.

Q: What is the primary difference between the substitute parts?

A: The BZD27C47P-E3-08 and BZD27C47P-E3-18 are standard-grade parts with identical electrical specifications. The BZD27C47P-HE3-08 is automotive-qualified (AEC-Q101) and carries Automotive grade designation, making it suitable for automotive applications requiring enhanced reliability documentation and traceability.

Q: Why do the substitute parts have a lower power rating (800 mW vs. 1 W)?

A: The substitute parts are rated at 800 mW maximum power dissipation. Applications requiring continuous operation above 800 mW at the 47 V Zener voltage must use the main part (BZD27C47P RHG) or identify alternative parts with higher power ratings.

Q: Are all parts ROHS3 compliant?

A: Yes. The main part BZD27C47P RHG and all substitute parts (BZD27C47P-E3-08, BZD27C47P-E3-18, BZD27C47P-HE3-08) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: What is the operating temperature range difference?

A: The main part operates from -55°C to 175°C. All substitute parts extend the lower temperature limit to -65°C, providing an additional 10°C of cold-temperature margin. The upper temperature limit remains 175°C across all parts.

Q: Which substitute part should be selected for automotive applications?

A: The BZD27C47P-HE3-08 is qualified to AEC-Q101 automotive standards and is the appropriate selection for automotive-grade applications. This part carries Automotive grade designation and provides the necessary qualification documentation for automotive supply chains.

Q: Is the DO-219AB package identical across all parts?

A: Yes. All parts use the DO-219AB Surface Mount package configuration. The supplier device package designation is Sub SMA for the main part and DO-219AB (SMF) for the substitute parts, both referring to the same physical package standard.

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