1N752A_T50R Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N752A_T50R is a 5.6 V zener diode rated at 500 mW with ±5% tolerance, manufactured by onsemi in DO-35 through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 1N752A_T50R functions as a voltage regulator and protective element in electronic circuits requiring stable 5.6 V reference voltage regulation.

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	-65 to 200	°C
Mounting Type	Through Hole	-
Package / Case	DO-204AH, DO-35, Axial	-

Substitute Part Grouping Explanation

Substitution of the 1N752A_T50R is determined by the following critical parameters: nominal zener voltage (5.6 V), tolerance (±5%), maximum power dissipation (500 mW), impedance (11 Ohms maximum), and through-hole DO-35 package compatibility. All substitute parts listed maintain these core electrical specifications within the allowed parameter ranges. Substitute parts are grouped into three categories based on their relationship to the main part:

Direct Substitutes (Parametric Equivalents): Parts with identical or superior electrical specifications and active product status, suitable for direct replacement without circuit redesign.

Similar Alternatives: Parts with the same nominal voltage and package but variations in tolerance, power rating, or impedance that remain functionally compatible within circuit design margins.

Upgrade Options: Parts offering improved specifications such as tighter tolerance or lower impedance while maintaining core voltage and power parameters.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vf (Max) @ If	Temp Range	Product Status
1N752A_T50R	onsemi	5.6 V	±5%	500 mW	11 Ω	1.5 V @ 200 mA	-65 to 200°C	Obsolete
1N5232B	Microchip Technology	5.6 V	±5%	500 mW	11 Ω	1.5 V @ 200 mA	-65 to 175°C	Active
BZX79C5V6	Taiwan Semiconductor Corporation	5.6 V	±5%	500 mW	40 Ω	1.5 V @ 100 mA	-65 to 175°C	Active
1N5232BTR	Fairchild Semiconductor	5.6 V	±5%	500 mW	11 Ω	1.2 V @ 200 mA	-65 to 200°C	Active
1N752A-1	Microchip Technology	5.6 V	±5%	500 mW	8 Ω	1.1 V @ 200 mA	-65 to 175°C	Active
1N752	Microchip Technology	5.6 V	±10%	400 mW	11 Ω	1.1 V @ 200 mA	-65 to 175°C	Active
1N752C	Microchip Technology	5.6 V	±2%	500 mW	11 Ω	1.1 V @ 200 mA	-65 to 175°C	Active
1N5232B TR PBFREE	Central Semiconductor Corp	5.6 V	±5%	500 mW	11 Ω	1.1 V @ 200 mA	-65 to 200°C	Active
1N752A TR PBFREE	Central Semiconductor Corp	5.6 V	±5%	500 mW	11 Ω	1.5 V @ 200 mA	-65 to 200°C	Active

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: The 1N5232B TR PBFREE (Central Semiconductor Corp) and 1N752A TR PBFREE (Central Semiconductor Corp) are direct parametric equivalents with active product status. Both maintain the 5.6 V nominal voltage, ±5% tolerance, 500 mW power rating, and 11 Ohm impedance specification. The 1N752A TR PBFREE provides identical electrical characteristics to the obsolete 1N752A_T50R with extended operating temperature range (-65 to 200°C) and RoHS3 compliance.

Secondary Recommendation - Equivalent Performance: The 1N5232BTR (Fairchild Semiconductor) offers active product status with matching core specifications (5.6 V, ±5%, 500 mW, 11 Ω impedance). Operating temperature range extends to -65 to 200°C, matching the original part. Forward voltage is reduced to 1.2 V @ 200 mA, providing improved efficiency characteristics.

Upgrade Option - Enhanced Tolerance: The 1N752C (Microchip Technology) provides tighter tolerance specification (±2% versus ±5%), maintaining all other electrical parameters. This option is suitable for applications requiring improved voltage regulation accuracy.

Alternative with Impedance Variation: The BZX79C5V6 (Taiwan Semiconductor Corporation) maintains 5.6 V nominal voltage and 500 mW power rating with RoHS3 compliance. Impedance specification is 40 Ohms maximum, which differs from the 11 Ohm specification of the main part. This part is suitable for applications where impedance variation does not affect circuit performance.

Lower Power Alternative: The 1N752 (Microchip Technology) provides 5.6 V regulation with reduced power rating (400 mW) and relaxed tolerance (±10%). This option is applicable only in circuits where 400 mW dissipation capacity is sufficient.

Frequently Asked Questions (FAQ)

Q: Can the 1N752A_T50R be directly replaced with the 1N5232B?

A: Yes. The 1N5232B maintains identical electrical specifications: 5.6 V nominal voltage, ±5% tolerance, 500 mW power rating, and 11 Ohm impedance. The 1N5232B is active product status and compatible with DO-35 through-hole mounting. Operating temperature range is -65 to 175°C, which is 25°C lower than the original part's maximum of 200°C.

Q: What is the difference between 1N752A_T50R and 1N752A-1?

A: The 1N752A-1 (Microchip Technology) maintains the same 5.6 V voltage and 500 mW power rating with ±5% tolerance. The 1N752A-1 offers improved impedance specification (8 Ohms maximum versus 11 Ohms) and reduced forward voltage (1.1 V @ 200 mA versus 1.5 V @ 200 mA). Operating temperature range is -65 to 175°C. The 1N752A-1 is an upgrade option with enhanced performance characteristics.

Q: Is the 1N752C suitable as a substitute?

A: Yes. The 1N752C is suitable for applications where tighter voltage tolerance is beneficial. It maintains 5.6 V nominal voltage, 500 mW power rating, and 11 Ohm impedance with improved ±2% tolerance specification. Operating temperature range is -65 to 175°C. The 1N752C is active product status.

Q: What is the significance of the "TR PBFREE" designation?

A: The "TR PBFREE" designation indicates lead-free (PBFREE) manufacturing and tape reel (TR) packaging format. Parts designated 1N752A TR PBFREE and 1N5232B TR PBFREE are RoHS3 compliant and suitable for applications requiring lead-free component specifications. These parts maintain identical electrical specifications to their non-PBFREE counterparts.

Q: Can the 1N752 (400 mW) replace the 1N752A_T50R (500 mW)?

A: The 1N752 is suitable only in applications where maximum power dissipation does not exceed 400 mW. The 1N752 also has relaxed tolerance specification (±10% versus ±5%), which may affect voltage regulation accuracy. Use the 1N752 only when circuit design margins accommodate these parameter differences.

Q: What is the difference between BZX79C5V6 and other 5.6 V alternatives?

A: The BZX79C5V6 (Taiwan Semiconductor Corporation) maintains 5.6 V nominal voltage and 500 mW power rating with RoHS3 compliance. The impedance specification is 40 Ohms maximum, which is higher than the 11 Ohm specification of the 1N752A_T50R. Forward voltage is specified at 1.5 V @ 100 mA. The BZX79C5V6 is suitable for applications where impedance variation does not impact circuit performance.

Q: Are all substitute parts available in DO-35 package?

A: Yes. All substitute parts listed are available in DO-35 through-hole package (DO-204AH designation). Package compatibility is maintained across all alternatives, allowing direct mechanical substitution in existing PCB designs.

Q: What compliance certifications should be considered for new designs?

A: The 1N752A TR PBFREE and 1N5232B TR PBFREE are RoHS3 compliant with lead-free manufacturing. The BZX79C5V6 is also RoHS3 compliant. All parts listed maintain REACH Unaffected status and EAR99 ECCN classification. For applications requiring RoHS compliance, select parts with ROHS3 Compliant designation.

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