PLZ27D-G3/H Equivalent & Substitute Parts

Part Overview

The PLZ27D-G3/H is a Zener diode rated at 27 V nominal voltage with 500 mW maximum power dissipation, manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component is packaged in DO-219AC (microSMF) format and supplied in Tape & Reel configuration. The part maintains Active product status and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or specific application qualifications such as automotive-grade certifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	27	V
Tolerance	±3%	%
Power - Max	500	mW
Impedance (Max)	45	Ohms
Current - Reverse Leakage @ Vr	200	nA
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	150	°C
Package / Case	DO-219AC
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PLZ27D-G3/H is determined by the following critical parameters:

Electrical Parameters (Must Match):

Voltage - Zener (Nom): 27 V
Tolerance: ±3%
Power - Max: 500 mW
Impedance (Max): 45 Ohms
Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA
Operating Temperature: 150°C

Mechanical Parameters (Must Match):

Package / Case: DO-219AC
Mounting Type: Surface Mount
Supplier Device Package: DO-219AC (microSMF)

Compliance Parameters (Must Match):

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
REACH Status: REACH Unaffected

All identified substitute parts maintain identical electrical and mechanical specifications. Variations exist in packaging format (Tape & Reel versus Cut Tape & Digi-Reel®) and automotive-grade qualifications (AEC-Q101), which do not affect core electrical performance but may influence application suitability.

Parameter Comparison

Parameter	PLZ27D-G3/H	PLZ27A-G3/H	PLZ27A-HG3_A/H	PLZ27C-HG3_A/H	PLZ27D-HG3_A/H
Voltage - Zener (Nom)	27 V	27 V	27 V	27 V	27 V
Tolerance	±3%	±3%	±3%	±3%	±3%
Power - Max	500 mW	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	45 Ohms	45 Ohms	45 Ohms	45 Ohms	45 Ohms
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	150°C	150°C	150°C	150°C	150°C
Package / Case	DO-219AC	DO-219AC	DO-219AC	DO-219AC	DO-219AC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade	Standard	Standard	Automotive	Automotive	Automotive
Qualification	Not Specified	Not Specified	AEC-Q101	AEC-Q101	AEC-Q101
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
Inventory Status	642 Pcs	769 Pcs	1164 Pcs	869 Pcs	23549 Pcs

Engineering Selection Recommendations

Standard Applications (Non-Automotive): PLZ27D-G3/H and PLZ27A-G3/H are suitable for general-purpose applications requiring 27 V Zener regulation. Both parts maintain identical electrical specifications and standard-grade classification. Selection between these two parts is determined by inventory availability and packaging preference, as both are supplied in Tape & Reel format.

Automotive Applications: PLZ27A-HG3_A/H, PLZ27C-HG3_A/H, and PLZ27D-HG3_A/H are qualified to AEC-Q101 automotive standards and carry automotive-grade designation. These parts are required for applications subject to automotive qualification requirements. PLZ27D-HG3_A/H offers significantly higher inventory availability (23549 pcs) and is supplied in Cut Tape & Digi-Reel® format, providing flexibility in packaging requirements.

Compliance Considerations: All substitute parts maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and REACH unaffected status. No compliance trade-offs exist between the main part and substitutes.

Reverse Leakage Current: PLZ27D-G3/H and PLZ27A-HG3_A/H specify reverse leakage current at 21 V, while PLZ27A-G3/H specifies this parameter at 19 V. Both measurements are within the 200 nA maximum specification and do not affect substitution eligibility.

Frequently Asked Questions (FAQ)

Q: Can PLZ27A-G3/H be used as a direct replacement for PLZ27D-G3/H?

A: Yes. Both parts share identical electrical parameters (27 V nominal, 500 mW power, ±3% tolerance, 45 Ohms impedance, 900 mV forward voltage). Both are standard-grade, ROHS3 compliant, and packaged in DO-219AC surface mount format. Substitution is electrically and mechanically valid.

Q: What is the difference between standard-grade and automotive-grade PLZ27 Zener diodes?

A: Standard-grade parts (PLZ27D-G3/H, PLZ27A-G3/H) are suitable for general industrial and consumer applications. Automotive-grade parts (PLZ27A-HG3_A/H, PLZ27C-HG3_A/H, PLZ27D-HG3_A/H) carry AEC-Q101 qualification and are required for automotive applications subject to automotive industry standards. Electrical specifications remain identical across both grades.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tape & Reel versus Cut Tape & Digi-Reel®) affects handling, storage, and assembly processes but does not alter electrical characteristics. PLZ27D-HG3_A/H supplied in Cut Tape & Digi-Reel® format delivers identical electrical performance to Tape & Reel variants.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts (PLZ27A-G3/H, PLZ27A-HG3_A/H, PLZ27C-HG3_A/H, PLZ27D-HG3_A/H) maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and REACH unaffected status.

Q: Which substitute part offers the highest inventory availability?

A: PLZ27D-HG3_A/H maintains the highest inventory level at 23549 pcs. This part is automotive-grade, AEC-Q101 qualified, and supplied in Cut Tape & Digi-Reel® format.

Q: Can I substitute a standard-grade part with an automotive-grade part?

A: Yes. Automotive-grade parts (PLZ27A-HG3_A/H, PLZ27C-HG3_A/H, PLZ27D-HG3_A/H) meet or exceed the specifications of standard-grade parts and are electrically interchangeable. Automotive-grade qualification adds additional quality assurance but does not restrict use in non-automotive applications.

Q: What determines whether a part is a valid substitute?

A: Valid substitutes maintain identical values for voltage rating (27 V), tolerance (±3%), power dissipation (500 mW), impedance (45 Ohms), forward voltage (900 mV @ 10 mA), operating temperature (150°C), package type (DO-219AC), mounting method (surface mount), and compliance status (ROHS3, MSL 1, REACH unaffected).

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