1N4752A B0G Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4752A B0G is a 33 V, 1 W Zener diode manufactured by Taiwan Semiconductor Corporation in DO-204AL (DO-41) axial through-hole package. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production needs. The part maintains ROHS3 compliance and operates across a temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	33	V
Power - Maximum	1	W
Tolerance	±5%	%
Impedance (Maximum)	45	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 25.1 V
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—

Substitute Part Grouping Explanation

Substitution of the 1N4752A B0G is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nominal): 33 V
Power - Maximum: 1 W
Tolerance: ±5%
Impedance (Maximum): 45 Ohms
Current - Reverse Leakage @ Vr: 5 µA @ 25.1 V
Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, Axial

Direct Equivalents maintain all electrical parameters and package specifications. These parts are functionally interchangeable with the 1N4752A B0G.

Similar Substitutes share the same zener voltage and tolerance but differ in power rating or impedance characteristics. These parts are suitable for applications where higher power dissipation capability is acceptable or beneficial.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Power (W)	Tolerance	Zzt (Ohms)	Ir @ Vr (µA)	Temp Range (°C)	Package	Status
1N4752A B0G	Taiwan Semiconductor Corporation	33	1	±5%	45	5 @ 25.1 V	-55 to 150	DO-204AL (DO-41)	Discontinued
1N4752A A0G	Taiwan Semiconductor Corporation	33	1	±5%	45	5 @ 25.1 V	-55 to 150	DO-204AL (DO-41)	Active
1N4752A	Lumimax Optoelectronic Technology	33	1	±5%	45	5 @ 25.1 V	-65 to 200	DO-41G	Active
1N4752A-T50A	onsemi	33	1	±5%	45	5 @ 25.1 V	-65 to 200	DO-41	Active
1N4752AP/TR12	Microchip Technology	33	1	±5%	45	5 @ 25.1 V	-65 to 150	DO-204AL (DO-41)	Active
1N4752ATR	onsemi	33	1	±5%	45	5 @ 25.1 V	-65 to 200	DO-41	Active
2EZ33D5-TP	Micro Commercial Co	33	2	±5%	23	500 nA @ 25.1 V	-55 to 150	DO-41	Active

Engineering Selection Recommendations

Direct Equivalents (Recommended for 1:1 Replacement):

1N4752A A0G (Taiwan Semiconductor Corporation) is the primary direct equivalent. This part maintains identical electrical specifications and package configuration as the 1N4752A B0G while offering active product status and improved availability (771 units in stock).

1N4752A-T50A (onsemi) and 1N4752ATR (onsemi) are functionally equivalent with extended operating temperature range (-65°C to 200°C) and active status. Both parts maintain the 33 V, 1 W specification with identical impedance and leakage characteristics. These parts are suitable for applications requiring broader temperature performance.

1N4752AP/TR12 (Microchip Technology) provides direct electrical equivalence with active status. Note that this part carries RoHS non-compliant designation, which may restrict use in applications requiring RoHS compliance.

1N4752A (Lumimax Optoelectronic Technology) offers extended operating temperature range (-65°C to 200°C) and maintains all critical electrical parameters. This part is available in high quantity (18,715 units in stock).

Similar Substitute (Higher Power Rating):

2EZ33D5-TP (Micro Commercial Co) is a similar substitute with doubled power rating (2 W) and reduced impedance (23 Ohms). This part is suitable for applications where the original 1 W specification is marginal or where improved thermal performance is beneficial. The lower impedance provides better voltage regulation characteristics. Reverse leakage is significantly lower (500 nA vs. 5 µA), which may affect circuit behavior in high-impedance applications.

Compliance Considerations:

All recommended direct equivalents maintain ROHS3 compliance except 1N4752AP/TR12. Selection should account for regulatory requirements in target applications.

Frequently Asked Questions (FAQ)

Q: Can 1N4752A A0G directly replace 1N4752A B0G?

A: Yes. Both parts share identical electrical specifications (33 V, 1 W, ±5% tolerance, 45 Ohms impedance, 5 µA reverse leakage) and package configuration (DO-204AL/DO-41). The A0G variant is currently active with improved availability.

Q: What is the difference between 1N4752A-T50A and 1N4752ATR?

A: Both are onsemi products with identical electrical specifications and extended temperature range (-65°C to 200°C). The primary difference is packaging format: 1N4752A-T50A is supplied in Cut Tape (CT) format, while 1N4752ATR is also in Cut Tape (CT) format. Both are suitable for automated assembly processes.

Q: Can 2EZ33D5-TP be used as a direct replacement?

A: 2EZ33D5-TP is a similar substitute, not a direct equivalent. While it maintains the 33 V zener voltage and ±5% tolerance, it differs in power rating (2 W vs. 1 W), impedance (23 Ohms vs. 45 Ohms), and reverse leakage (500 nA vs. 5 µA). This part is suitable for applications where higher power dissipation is acceptable or required. Circuit behavior may differ due to lower impedance and leakage characteristics.

Q: Are all substitute parts available in the same package?

A: All substitute parts are available in DO-41 or DO-204AL (DO-41) axial through-hole packages, maintaining mechanical compatibility. Specific supplier device packages vary by manufacturer but are functionally equivalent for PCB mounting.

Q: Which substitute offers the best temperature performance?

A: 1N4752A (Lumimax), 1N4752A-T50A (onsemi), and 1N4752ATR (onsemi) all offer extended operating temperature range of -65°C to 200°C, compared to the original -55°C to 150°C specification. These parts are suitable for applications requiring broader thermal operating conditions.

Q: What is the impact of different impedance values on circuit performance?

A: Impedance affects voltage regulation characteristics. The original 1N4752A B0G and its direct equivalents maintain 45 Ohms impedance. The 2EZ33D5-TP substitute has lower impedance (23 Ohms), resulting in better voltage regulation and lower dynamic resistance. This may affect circuit behavior in applications sensitive to zener impedance characteristics.

Q: Are there RoHS compliance differences among substitutes?

A: Most substitutes maintain ROHS3 compliance. The exception is 1N4752AP/TR12 (Microchip Technology), which is RoHS non-compliant. Selection should account for regulatory requirements in target applications and end-use markets.

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