PTV27B-E3/84A Equivalent & Substitute Parts

Part Overview

The PTV27B-E3/84A is a Zener diode rated at 28.9 V nominal voltage with 600 mW power dissipation, manufactured by Vishay General Semiconductor - Diodes Division. This component is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing design support and procurement. The part is housed in a DO-220AA (SMP) surface mount package and complies with RoHS3 and REACH regulations.

Key Parameters

Parameter	Value
Voltage - Zener (Nom) (Vz)	28.9 V
Tolerance	±7%
Power - Max	600 mW
Impedance (Max) (Zzt)	16 Ohms
Current - Reverse Leakage @ Vr	10 µA @ 21 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA
Operating Temperature	150°C
Package / Case	DO-220AA
Mounting Type	Surface Mount
Series	eSMP®

Substitute Part Grouping Explanation

Substitution of the PTV27B-E3/84A is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Critical for Substitution):

Zener voltage: 28.9 V nominal
Tolerance: ±7%
Maximum power dissipation: 600 mW
Maximum impedance: 16 Ohms
Reverse leakage current: 10 µA @ 21 V
Forward voltage: 1.5 V @ 200 mA
Operating temperature: 150°C

Mechanical Parameters (Critical for Substitution):

Package type: DO-220AA (SMP)
Mounting type: Surface Mount
Series designation: eSMP®

Regulatory Compliance (Required for Substitution):

RoHS3 Compliant
REACH Unaffected
Moisture Sensitivity Level: 1 (Unlimited)

The substitute parts PTV27B-M3/84A and PTV27B-M3/85A meet all electrical and mechanical requirements. The primary distinction between the main part and substitutes is product status and packaging configuration (bulk versus Tape & Reel).

Parameter Comparison

Parameter	PTV27B-E3/84A	PTV27B-M3/84A	PTV27B-M3/85A
Voltage - Zener (Nom) (Vz)	28.9 V	28.9 V	28.9 V
Tolerance	±7%	±7%	±7%
Power - Max	600 mW	600 mW	600 mW
Impedance (Max) (Zzt)	16 Ohms	16 Ohms	16 Ohms
Current - Reverse Leakage @ Vr	10 µA @ 21 V	10 µA @ 21 V	10 µA @ 21 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA	1.5 V @ 200 mA
Operating Temperature	150°C	150°C	150°C
Package / Case	DO-220AA	DO-220AA	DO-220AA
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Series	eSMP®	eSMP®	eSMP®
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

PTV27B-M3/84A is the primary substitute for PTV27B-E3/84A. Both parts are manufactured by Vishay General Semiconductor - Diodes Division within the eSMP® series and maintain identical electrical and mechanical specifications. The PTV27B-M3/84A carries Active product status, ensuring long-term availability and manufacturing support. This part is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. Current inventory of 3887 pieces supports production requirements.

PTV27B-M3/85A is an alternative substitute with equivalent electrical and mechanical parameters. This part also carries Active product status and is supplied in Tape & Reel (TR) packaging. Current inventory of 1061 pieces is available. Selection between PTV27B-M3/84A and PTV27B-M3/85A depends on packaging quantity requirements and supply chain logistics, as both parts are electrically and mechanically identical.

Both substitute parts satisfy RoHS3 compliance and REACH regulatory requirements, matching the compliance profile of the obsolete PTV27B-E3/84A. The transition from obsolete to active status ensures continued component availability and manufacturing continuity.

Frequently Asked Questions (FAQ)

Q: Can PTV27B-M3/84A directly replace PTV27B-E3/84A in existing designs?

A: Yes. The PTV27B-M3/84A is electrically and mechanically equivalent to PTV27B-E3/84A. All critical parameters including Zener voltage (28.9 V), power rating (600 mW), impedance (16 Ohms), and package type (DO-220AA) are identical. The primary difference is product status: PTV27B-M3/84A is Active while PTV27B-E3/84A is Obsolete.

Q: What is the difference between PTV27B-M3/84A and PTV27B-M3/85A?

A: Both parts are electrically and mechanically identical. The difference lies in packaging configuration. Both are supplied in Tape & Reel (TR) format. Selection between these parts should be based on procurement quantity requirements and supply chain availability.

Q: Are the substitute parts compatible with the original PCB layout?

A: Yes. Both PTV27B-M3/84A and PTV27B-M3/85A use the same DO-220AA (SMP) package as the original PTV27B-E3/84A. Surface mount footprints and land patterns are identical, requiring no PCB redesign.

Q: Do the substitute parts meet the same regulatory requirements?

A: Yes. Both PTV27B-M3/84A and PTV27B-M3/85A are RoHS3 Compliant and REACH Unaffected, matching the compliance status of PTV27B-E3/84A. Moisture Sensitivity Level is 1 (Unlimited) for all three parts.

Q: What is the maximum operating temperature for these Zener diodes?

A: The maximum operating temperature for PTV27B-E3/84A, PTV27B-M3/84A, and PTV27B-M3/85A is 150°C.

Q: Are there inventory considerations when selecting between substitute parts?

A: Yes. PTV27B-M3/84A has 3887 pieces in stock, while PTV27B-M3/85A has 1061 pieces in stock. For high-volume production, PTV27B-M3/84A offers greater immediate availability.

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