BZD27C20P RTG Equivalent & Substitute Parts

Part Overview

The BZD27C20P RTG is a Zener diode rated at 20 V nominal voltage with 1 W maximum power dissipation, manufactured by Taiwan Semiconductor Corporation. This surface mount component operates across a temperature range of -55°C to 175°C and is housed in a DO-219AB package. The part is currently Active in product status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified to address inventory availability, extended temperature operating ranges, automotive qualification requirements, or alternative sourcing from qualified manufacturers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	20	V
Power - Maximum	1	W
Tolerance	±6%	-
Impedance (Maximum)	15	Ohms
Current - Reverse Leakage @ 15 V	1	µA
Voltage - Forward (Maximum) @ 200 mA	1.2	V
Operating Temperature Range	-55 to 175	°C
Mounting Type	Surface Mount	-
Package / Case	DO-219AB	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the BZD27C20P RTG is determined by the following critical parameters that must remain constant across all equivalent parts:

Mandatory Matching Parameters:

Zener voltage: 20 V nominal
Package type: DO-219AB surface mount
Impedance (Maximum): 15 Ohms
Reverse leakage current: 1 µA @ 15 V
Forward voltage: 1.2 V @ 200 mA
RoHS3 compliance
MSL rating: 1 (Unlimited)

Allowable Variations:

Power rating: The main part is rated at 1 W; substitute parts rated at 800 mW (0.8 W) are acceptable as they represent a lower power specification within the same package footprint and thermal characteristics
Operating temperature range: Extended ranges (-65°C to 175°C) are acceptable as they encompass the original specification
Manufacturer: Vishay General Semiconductor - Diodes Division substitutes are qualified alternatives to Taiwan Semiconductor Corporation
Packaging format: Tape & Reel (TR) is compatible with the original Sub SMA packaging for surface mount assembly

All three substitute parts (BZD27C20P-E3-08, BZD27C20P-HE3-08, BZD27C20P-M3-08) share the BZD27 base product number and maintain electrical equivalence through identical zener voltage, impedance, leakage current, and forward voltage specifications.

Parameter Comparison

Parameter	BZD27C20P RTG	BZD27C20P-E3-08	BZD27C20P-HE3-08	BZD27C20P-M3-08
Manufacturer	Taiwan Semiconductor Corporation	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor
Voltage - Zener (Nom)	20 V	20 V	20 V	20 V
Power - Max	1 W	800 mW	800 mW	800 mW
Impedance (Max)	15 Ohms	15 Ohms	15 Ohms	15 Ohms
Current - Reverse Leakage @ 15 V	1 µA	1 µA	1 µA	1 µA
Voltage - Forward (Max) @ 200 mA	1.2 V	1.2 V	1.2 V	1.2 V
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
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Automotive Grade	-	-	AEC-Q101	-

Engineering Selection Recommendations

BZD27C20P-E3-08 (Vishay): This substitute maintains full electrical equivalence with identical zener voltage, impedance, leakage current, and forward voltage specifications. The 800 mW power rating is lower than the original 1 W specification but operates within the same DO-219AB package. Extended operating temperature range of -65°C to 175°C provides broader environmental coverage. RoHS3 compliance and MSL 1 rating match the original part. Selection is appropriate for applications where the reduced power dissipation is acceptable.

BZD27C20P-HE3-08 (Vishay): This variant is electrically identical to BZD27C20P-E3-08 with the addition of AEC-Q101 automotive qualification. The part meets automotive-grade reliability standards and is suitable for applications requiring automotive-level component certification. All electrical parameters, temperature range, and compliance certifications remain equivalent to the standard industrial version.

BZD27C20P-M3-08 (Vishay): This substitute is electrically equivalent with identical zener voltage, impedance, leakage current, and forward voltage. The BZD27-M series designation indicates a specific Vishay product line variant. Operating temperature range extends to -65°C, and all compliance requirements match the original specification. Selection is appropriate for general industrial applications requiring Vishay sourcing.

All three substitutes are Active products with confirmed inventory availability and maintain full compatibility with the original BZD27C20P RTG in surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can BZD27C20P-E3-08, BZD27C20P-HE3-08, and BZD27C20P-M3-08 be used interchangeably with BZD27C20P RTG?

A: Yes, all three Vishay substitutes are electrically equivalent for the critical zener voltage (20 V), impedance (15 Ohms), reverse leakage current (1 µA @ 15 V), and forward voltage (1.2 V @ 200 mA) specifications. The DO-219AB package ensures mechanical and thermal compatibility. The 800 mW power rating of the substitutes is lower than the original 1 W specification; applications must confirm that circuit power dissipation does not exceed 800 mW.

Q: What is the difference between BZD27C20P-HE3-08 and the other two substitutes?

A: BZD27C20P-HE3-08 carries AEC-Q101 automotive qualification, making it suitable for automotive applications requiring automotive-grade component certification. BZD27C20P-E3-08 and BZD27C20P-M3-08 are industrial-grade equivalents without automotive qualification. All three maintain identical electrical specifications and operating temperature ranges.

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

A: The original BZD27C20P RTG operates from -55°C to 175°C. All three Vishay substitutes extend the lower temperature limit to -65°C, providing a broader operating range. The upper temperature limit of 175°C remains constant. This extended range is compatible with the original specification.

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

A: DO-219AB is the standardized package type for surface mount Zener diodes in the BZD27 series. All parts listed (main and substitutes) use this identical package, ensuring compatibility with existing PCB layouts, assembly processes, and thermal management designs. The package provides consistent mechanical footprint and electrical performance.

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

A: The 800 mW substitutes are suitable for applications where circuit power dissipation does not exceed 800 mW. Applications requiring the full 1 W power dissipation capability must use the original BZD27C20P RTG or confirm that the substitute's lower power rating is adequate for the specific circuit design.

Q: Are all parts RoHS3 compliant?

A: Yes, the original BZD27C20P RTG and all three Vishay substitutes are RoHS3 compliant. All parts carry MSL 1 (Unlimited) moisture sensitivity level rating, indicating no special moisture handling requirements during storage or assembly.

Q: What is the base product number significance?

A: The BZD27 base product number indicates the core Zener diode family. All listed parts share this base designation, confirming they belong to the same product family with consistent electrical characteristics and package standards. Suffix variations (such as -E3-08, -HE3-08, -M3-08) indicate manufacturer-specific variants or qualification levels.

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