1N4754A-T Equivalent & Substitute Parts

Part Overview

The 1N4754A-T is a Zener diode rated at 39 V with 1.3 W maximum power dissipation, packaged in a DO-41 through-hole configuration. Manufactured by Vishay General Semiconductor - Diodes Division, this component is qualified to AEC-Q101 automotive standards and complies with ROHS3 requirements.

The 1N4754A-T is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for applications utilizing this Zener diode specification.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	39	V
Tolerance	±5	%
Power - Maximum	1.3	W
Impedance (Maximum)	1000	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 29.7 V
Voltage - Forward (Maximum) @ If	1.2	V @ 200 mA
Operating Temperature	175	°C
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 1N4754A-T is determined by electrical and mechanical parameter equivalence within the Zener diode category. The critical parameters governing substitution are:

Electrical Parameters:

Zener voltage: 39 V nominal with ±5% tolerance
Maximum power dissipation: 1.3 W
Reverse leakage current: 5 µA @ 29.7 V
Forward voltage: 1.2 V maximum @ 200 mA
Operating temperature rating: 175°C

Mechanical Parameters:

Package type: DO-41 through-hole axial configuration
Mounting: Through-hole PCB mounting

Compliance Parameters:

Automotive grade qualification: AEC-Q101
RoHS compliance: ROHS3 Compliant

The 1N4754A-TR is a direct electrical and mechanical equivalent to the 1N4754A-T. Both components share identical nominal Zener voltage, power rating, tolerance, reverse leakage specifications, forward voltage characteristics, and operating temperature range. Both are AEC-Q101 qualified automotive-grade components in DO-41 packaging. The primary distinction is packaging format: the 1N4754A-T uses standard packaging while the 1N4754A-TR is supplied in cut tape format. The 1N4754A-TR maintains active product status, ensuring continued availability and supply chain support.

Parameter Comparison

Parameter	1N4754A-T	1N4754A-TR	Unit
Voltage - Zener (Nominal)	39	39	V
Tolerance	±5	±5	%
Power - Maximum	1.3	1.3	W
Current - Reverse Leakage @ Vr	5 @ 29.7 V	5 @ 29.7 V	µA
Voltage - Forward (Maximum) @ If	1.2 @ 200 mA	1.2 @ 200 mA	V
Operating Temperature	175	175	°C
Mounting Type	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Grade	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active

Engineering Selection Recommendations

The 1N4754A-TR is the direct substitute for the obsolete 1N4754A-T. Both components are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications, mechanical packaging, and automotive-grade AEC-Q101 qualification.

Selection of the 1N4754A-TR is supported by:

Product Status: The 1N4754A-TR maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete 1N4754A-T.

Electrical Equivalence: All critical electrical parameters—Zener voltage, power rating, tolerance, reverse leakage, and forward voltage—are identical between the two parts.

Compliance Alignment: Both components meet ROHS3 compliance requirements and carry AEC-Q101 automotive qualification, maintaining regulatory and quality standards for automotive applications.

Packaging Compatibility: The 1N4754A-TR is supplied in cut tape packaging format, which is standard for high-volume production environments. The through-hole DO-41 package remains identical, ensuring direct PCB mounting compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 1N4754A-TR be used as a direct replacement for the 1N4754A-T?

A: Yes. The 1N4754A-TR is a direct electrical and mechanical equivalent. Both components have identical Zener voltage (39 V), power rating (1.3 W), tolerance (±5%), reverse leakage (5 µA @ 29.7 V), forward voltage (1.2 V @ 200 mA), and operating temperature (175°C). Both are AEC-Q101 qualified automotive-grade components in DO-41 through-hole packaging.

Q: What is the difference between the 1N4754A-T and 1N4754A-TR?

A: The primary difference is packaging format. The 1N4754A-T uses standard packaging, while the 1N4754A-TR is supplied in cut tape format. This distinction affects handling and automated assembly processes but does not impact electrical performance or mechanical compatibility.

Q: Why is the 1N4754A-T classified as obsolete?

A: The 1N4754A-T has been discontinued by the manufacturer. The 1N4754A-TR remains in active production and is the recommended substitute for ongoing applications.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the 1N4754A-T and 1N4754A-TR are automotive-grade components qualified to AEC-Q101 standards, meeting automotive industry reliability and quality requirements.

Q: Does the cut tape packaging of the 1N4754A-TR affect PCB mounting?

A: No. Cut tape packaging is a supply format used for automated assembly processes. Once removed from the tape, the 1N4754A-TR component is identical to the 1N4754A-T and mounts identically in through-hole PCB applications.

Q: Are there any impedance differences between these parts?

A: The 1N4754A-T specifies maximum impedance of 1000 Ohms, while the 1N4754A-TR specifies 60 Ohms maximum. Both values fall within acceptable operating ranges for Zener diode applications. The lower impedance of the 1N4754A-TR indicates improved dynamic performance characteristics.

Q: Do both parts comply with RoHS requirements?

A: Yes. Both the 1N4754A-T and 1N4754A-TR are ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.

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