1N752A Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N752A is a 5.6 V zener diode rated at 500 mW with ±5% tolerance, housed in a DO-35 through-hole package. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical specifications while offering improved availability and active product support from alternative manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	5.6	V
Tolerance	±5%	-
Power - Max	500	mW
Impedance (Max)	11	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 200 mA
Operating Temperature Range	-65 to 200	°C
Mounting Type	Through Hole	-
Package / Case	DO-204AH, DO-35, Axial	-

Substitute Part Grouping Explanation

Substitution of the 1N752A is determined by the following critical parameters: nominal zener voltage (5.6 V), tolerance (±5%), maximum power dissipation (500 mW), impedance characteristics, and through-hole axial package format. Substitute parts are grouped into three categories based on their relationship to the main part specifications:

Direct Equivalents maintain identical electrical specifications and package format. These parts are interchangeable in applications where the 1N752A was originally specified.

Similar Substitutes share the same nominal voltage and tolerance but may differ in power rating, impedance, or temperature range. These parts are suitable for applications where the primary requirement is voltage regulation at 5.6 V with ±5% tolerance.

Upgrade Variants provide improved specifications such as tighter tolerance, lower impedance, or enhanced temperature performance while maintaining backward compatibility with the original part's core function.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vf (Max) @ If	Temp Range	Package	Product Status
1N752A	onsemi	5.6 V	±5%	500 mW	11 Ω	1.5 V @ 200 mA	-65 to 200°C	DO-35	Obsolete
1N752C	Microchip Technology	5.6 V	±2%	500 mW	11 Ω	1.1 V @ 200 mA	-65 to 175°C	DO-35	Active
1N752A-1	Microchip Technology	5.6 V	±5%	500 mW	8 Ω	1.1 V @ 200 mA	-65 to 175°C	DO-35	Active
1N752	Microchip Technology	5.6 V	±10%	400 mW	11 Ω	1.1 V @ 200 mA	-65 to 175°C	DO-35	Active
1N752A TR PBFREE	Central Semiconductor Corp	5.6 V	±5%	500 mW	11 Ω	1.5 V @ 200 mA	-65 to 200°C	DO-35	Active
BZX79C5V6	Taiwan Semiconductor Corporation	5.6 V	±5%	500 mW	40 Ω	1.5 V @ 100 mA	-65 to 175°C	DO-35	Active
1N5232B	Microchip Technology	5.6 V	±5%	500 mW	11 Ω	1.5 V @ 200 mA	-65 to 175°C	DO-35	Active
1N5232BTR	Fairchild Semiconductor	5.6 V	±5%	500 mW	11 Ω	1.2 V @ 200 mA	-65 to 200°C	DO-35	Active
1N4734A	Microsemi Corporation	5.6 V	±5%	1 W	5 Ω	-	-65 to 200°C	DO-41	Active
1N5919BP-TP	Micro Commercial Co	5.6 V	±5%	1.5 W	2 Ω	1.5 V @ 200 mA	-55 to 150°C	DO-41	Last Time Buy

Engineering Selection Recommendations

Direct Replacement (Same Package, Same Specifications):

The 1N752A TR PBFREE from Central Semiconductor Corp is the primary direct replacement. This part maintains identical electrical specifications (5.6 V, ±5%, 500 mW, DO-35 package) and extends the operating temperature range to 200°C, matching the original part. The part is RoHS3 compliant and carries active product status with 6,462 units in stock.

Preferred Equivalent (Active Status, Tighter Tolerance):

The 1N752C from Microchip Technology offers improved tolerance (±2% versus ±5%) while maintaining the same power rating and package. This part is active and suitable for applications requiring enhanced voltage regulation accuracy. The operating temperature range is -65 to 175°C.

Functional Equivalent (Same Specifications, Active Status):

The 1N752A-1 from Microchip Technology provides identical nominal specifications with improved impedance characteristics (8 Ω versus 11 Ω) and lower forward voltage drop. This part is active with 740 units in stock and is suitable for direct substitution in new designs.

Parametric Equivalents (500 mW, DO-35 Package):

The 1N5232B and 1N5232BTR maintain the 5.6 V nominal voltage, ±5% tolerance, and 500 mW power rating in DO-35 packages. Both parts are active and provide compatibility with the original specification. The 1N5232BTR extends the operating temperature to 200°C.

Higher Power Alternative (DO-41 Package):

The 1N4734A from Microsemi Corporation provides 1 W power dissipation in a DO-41 package. This part is suitable for applications requiring increased power handling while maintaining the 5.6 V regulation voltage. The larger package accommodates higher thermal dissipation.

Compliance Considerations:

The 1N752A TR PBFREE carries RoHS3 compliance certification. The BZX79C5V6 from Taiwan Semiconductor Corporation is also RoHS3 compliant. Parts from Microchip Technology (1N752C, 1N752A-1, 1N5232B) are RoHS non-compliant. Selection should account for regulatory requirements in the target application.

Frequently Asked Questions (FAQ)

Q: Can the 1N752A be directly replaced with the 1N752A TR PBFREE?

A: Yes. The 1N752A TR PBFREE maintains identical electrical specifications (5.6 V, ±5%, 500 mW) and package format (DO-35). Both parts are through-hole axial components with the same pinout and footprint. The primary difference is active product status and RoHS3 compliance of the substitute.

Q: What is the difference between the 1N752A and 1N752C?

A: The 1N752C offers tighter tolerance (±2% versus ±5%) and lower forward voltage drop (1.1 V versus 1.5 V at 200 mA). Both parts share the same 5.6 V nominal voltage, 500 mW power rating, and DO-35 package. The 1N752C is suitable for applications requiring improved voltage regulation accuracy.

Q: Can the 1N752A be replaced with the 1N4734A?

A: The 1N4734A is functionally compatible but uses a different package (DO-41 versus DO-35). The 1N4734A provides higher power dissipation (1 W versus 500 mW) and lower impedance (5 Ω versus 11 Ω). PCB layout modifications are required due to the larger package footprint. This substitution is suitable only when the application can accommodate the larger package and benefits from increased power handling.

Q: What is the significance of the DO-35 and DO-41 package designations?

A: DO-35 and DO-41 are through-hole axial package formats for diodes. DO-35 is the smaller package used in the 1N752A. DO-41 is a larger package used in higher-power devices such as the 1N4734A. These packages are not interchangeable on the same PCB without layout modifications. The choice depends on available board space and thermal requirements.

Q: Are there RoHS-compliant alternatives to the 1N752A?

A: Yes. The 1N752A TR PBFREE from Central Semiconductor Corp and the BZX79C5V6 from Taiwan Semiconductor Corporation are both RoHS3 compliant. Both maintain the 5.6 V nominal voltage, ±5% tolerance, and 500 mW power rating in DO-35 packages.

Q: What does the "TR PBFREE" designation indicate?

A: The "TR PBFREE" designation indicates that the part is lead-free (PBFREE) and supplied in tape reel (TR) packaging format. This designation reflects compliance with RoHS directives that restrict the use of lead in electronic components.

Q: Can the 1N752A be replaced with the BZX79C5V6?

A: Yes, with impedance considerations. The BZX79C5V6 maintains the 5.6 V nominal voltage, ±5% tolerance, and 500 mW power rating in a DO-35 package. However, the impedance is higher (40 Ω versus 11 Ω), which may affect voltage regulation performance in circuits sensitive to impedance characteristics. Verification of circuit performance is necessary in impedance-critical applications.

Q: What is the difference between the 1N752A-1 and the 1N752A?

A: The 1N752A-1 provides improved impedance (8 Ω versus 11 Ω) and lower forward voltage drop (1.1 V versus 1.5 V at 200 mA). Both parts share the same 5.6 V nominal voltage, ±5% tolerance, and 500 mW power rating in DO-35 packages. The 1N752A-1 is an active product from Microchip Technology and is suitable for direct substitution.

Q: Is the 1N752 (without the "A" suffix) a suitable replacement?

A: The 1N752 has a wider tolerance (±10% versus ±5%) and lower power rating (400 mW versus 500 mW). This part is suitable only for applications where the wider tolerance and lower power rating are acceptable. The 1N752 is not recommended as a direct replacement for the 1N752A in precision voltage regulation applications.

Q: What inventory levels are available for substitute parts?

A: Inventory levels vary significantly. The 1N752A TR PBFREE has 6,462 units in stock. The 1N752C has 817 units. The 1N752A-1 has 740 units. The BZX79C5V6 has 34,400 units. The 1N4734A has 285,200 units. Availability should be confirmed with the component supplier for production requirements.

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