Equivalent & Substitute Parts for ZPY39-TR Zener Diode

Part Overview

The ZPY39-TR is a 39 V, 1.3 W Zener diode manufactured by Vishay General Semiconductor - Diodes Division, supplied in Tape & Reel packaging. This automotive-grade component operates at a maximum junction temperature of 175°C and carries AEC-Q101 qualification. The part is Active in product status with 982 units currently in stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the specified parameter tolerances. Alternative sources and packaging formats are available to support supply chain flexibility and procurement requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	39	V
Tolerance	±5%	-
Power - Maximum	1.3	W
Impedance (Maximum)	30	Ohms
Current - Reverse Leakage @ Vr	500 nA @ 29 V	-
Operating Temperature	175	°C
Mounting Type	Through Hole	-
Package / Case	DO-204AL (DO-41)	-
Grade	Automotive	-
Qualification	AEC-Q101	-

Substitute Part Grouping Explanation

Substitution eligibility for the ZPY39-TR is determined by the following criteria:

Primary Substitution Parameters:

Zener voltage: 39 V nominal with ±5% tolerance
Power dissipation: minimum 1.3 W maximum rating
Package type: DO-204AL (DO-41) axial through-hole configuration
Mounting compatibility: Through-hole assembly

Secondary Compatibility Factors:

Automotive grade classification and AEC-Q101 qualification
Operating temperature range: 175°C maximum junction temperature
RoHS3 compliance and REACH unaffected status

Substitute parts are grouped into two categories:

Category 1 - Parametric Equivalent (Packaging Variant): ZPY39-TAP maintains identical electrical specifications and impedance characteristics as the main part, differing only in packaging format (Cut Tape versus Tape & Reel).

Category 2 - Direct Manufacturer Equivalent (Cross-Reference): 1N4754A-TAP and 1N4754A are direct cross-references from Vishay with equivalent voltage and power ratings. These parts exhibit higher impedance (60 Ohms maximum) and different reverse leakage characteristics but maintain functional compatibility within the 39 V, 1.3 W specification envelope.

Parameter Comparison

Parameter	ZPY39-TR	ZPY39-TAP	1N4754A-TAP	1N4754A
Voltage - Zener (Nom)	39 V	39 V	39 V	39 V
Tolerance	±5%	±5%	±5%	±5%
Power - Max	1.3 W	1.3 W	1.3 W	1 W
Impedance (Max)	30 Ohms	30 Ohms	60 Ohms	60 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 29 V	500 nA @ 29 V	5 µA @ 29.7 V	5 µA @ 29.7 V
Operating Temperature	175°C	175°C	175°C (TJ)	-65°C ~ 200°C
Package / Case	DO-204AL (DO-41)	DO-204AL (DO-41)	DO-204AL (DO-41)	DO-204AL (DO-41)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Grade	Automotive	Automotive	Automotive	-
Qualification	AEC-Q101	AEC-Q101	AEC-Q101	-
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)	Cut Tape (CT)	Bulk
Manufacturer	Vishay	Vishay	Vishay	Lumimax

Engineering Selection Recommendations

ZPY39-TAP Selection Criteria: ZPY39-TAP is the preferred parametric equivalent when packaging format flexibility is required. This part maintains identical electrical specifications, impedance characteristics, and reverse leakage performance as the main part ZPY39-TR. Both parts carry Automotive grade classification and AEC-Q101 qualification. Selection of ZPY39-TAP is appropriate for applications where Cut Tape packaging accommodates assembly processes, with 25,674 units available in inventory.

1N4754A-TAP Selection Criteria: 1N4754A-TAP is a direct manufacturer cross-reference from Vishay with equivalent voltage and power ratings. This part exhibits higher impedance (60 Ohms maximum versus 30 Ohms) and elevated reverse leakage current (5 µA @ 29.7 V versus 500 nA @ 29 V). Despite these parameter differences, 1N4754A-TAP maintains AEC-Q101 qualification and Automotive grade status. This part is suitable for applications where impedance variation and leakage characteristics fall within acceptable design margins. Inventory availability is 56,900 units.

1N4754A Selection Criteria: 1N4754A from Lumimax Optoelectronic Technology is a cross-reference alternative with 39 V nominal voltage and ±5% tolerance. This part carries a 1 W maximum power rating, which is below the 1.3 W specification of the main part. Operating temperature range extends to 200°C maximum. This part does not carry Automotive grade or AEC-Q101 qualification. Selection of 1N4754A is restricted to non-automotive applications or where power dissipation requirements do not exceed 1 W. Inventory availability is 5,990 units.

Compliance Summary: All Vishay parts (ZPY39-TR, ZPY39-TAP, 1N4754A-TAP) are ROHS3 compliant and REACH unaffected. The Lumimax 1N4754A is RoHS compliant and REACH unaffected. All parts carry EAR99 ECCN classification and HTSUS code 8541.10.0050.

Frequently Asked Questions (FAQ)

Q: Can ZPY39-TAP replace ZPY39-TR in automotive applications?

A: Yes. ZPY39-TAP is a parametric equivalent with identical electrical specifications, impedance, and reverse leakage characteristics. Both parts carry Automotive grade classification and AEC-Q101 qualification. The difference is packaging format: ZPY39-TR is supplied in Tape & Reel, while ZPY39-TAP is supplied in Cut Tape. Selection depends on assembly process compatibility.

Q: What are the impedance differences between substitute parts?

A: ZPY39-TR and ZPY39-TAP both specify 30 Ohms maximum impedance. 1N4754A-TAP and 1N4754A specify 60 Ohms maximum impedance. Higher impedance may affect voltage regulation performance in applications with dynamic load conditions. Verify impedance requirements against circuit design specifications before substitution.

Q: Is 1N4754A suitable for automotive applications?

A: 1N4754A from Lumimax does not carry Automotive grade classification or AEC-Q101 qualification. This part is not suitable for automotive applications requiring these certifications. Use only Vishay parts (ZPY39-TR, ZPY39-TAP, or 1N4754A-TAP) for automotive-grade requirements.

Q: What is the reverse leakage difference between parts?

A: ZPY39-TR and ZPY39-TAP specify 500 nanoamperes reverse leakage at 29 V. 1N4754A-TAP and 1N4754A specify 5 microamperes reverse leakage at 29.7 V. The 10-fold difference in leakage current may impact circuit performance in high-impedance applications. Verify leakage specifications against circuit design requirements.

Q: Can 1N4754A replace ZPY39-TR due to lower power rating?

A: 1N4754A carries a 1 W maximum power rating, which is below the 1.3 W specification of ZPY39-TR. This part is not suitable for applications requiring 1.3 W power dissipation. Additionally, 1N4754A lacks Automotive grade and AEC-Q101 qualification. Substitution is not recommended for automotive or high-power applications.

Q: Are all substitute parts in the same DO-41 package?

A: Yes. All parts (ZPY39-TR, ZPY39-TAP, 1N4754A-TAP, and 1N4754A) use the DO-204AL (DO-41) axial through-hole package. Mechanical compatibility and PCB footprint are identical across all parts. Packaging format differences (Tape & Reel, Cut Tape, or Bulk) affect only supply and assembly handling, not component installation.

Q: What is the operating temperature range for each part?

A: ZPY39-TR, ZPY39-TAP, and 1N4754A-TAP specify 175°C maximum junction temperature. 1N4754A specifies -65°C to 200°C operating range. For automotive applications with thermal cycling requirements, verify that the selected part's temperature range accommodates the application environment.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message