1N750ATR Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N750ATR is a 4.7 V zener diode rated for 500 mW power dissipation in a DO-35 through-hole package, manufactured by onsemi. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 1N750ATR operates across a temperature range of -65°C to 200°C with ±5% voltage tolerance and is suitable for voltage regulation and protection applications in electronic circuits.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	4.7	V
Tolerance	±5%	-
Power - Max	500	mW
Impedance (Max)	19	Ohms
Current - Reverse Leakage @ Vr	2	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 1N750ATR is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Zener voltage (Nom): 4.7 V
Tolerance: ±5%
Power rating: 500 mW
Package type: DO-35 (DO-204AH) through-hole
Impedance (Max): 19 Ohms
Operating temperature range: -65°C to 200°C minimum

Parts meeting all primary criteria are classified as parametric equivalents. Parts with variations in secondary parameters (reverse leakage current, forward voltage, impedance) are classified as similar substitutes. Parts with different tolerance specifications or package types are noted as having limited compatibility.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vf (Max) @ If	Temp Range	Package	Status
1N750ATR	onsemi	4.7 V	±5%	500 mW	19 Ω	1.5 V @ 200 mA	-65 to 200°C	DO-35	Obsolete
1N5230BTR	Fairchild Semiconductor	4.7 V	±5%	500 mW	19 Ω	1.2 V @ 200 mA	-65 to 200°C	DO-35	Active
1N750A TR PBFREE	Central Semiconductor Corp	4.7 V	±5%	500 mW	19 Ω	1.5 V @ 200 mA	-65 to 200°C	DO-35	Active
1N5230B TR PBFREE	Central Semiconductor Corp	4.7 V	±5%	500 mW	19 Ω	1.1 V @ 200 mA	-65 to 200°C	DO-35	Active
1N5230B	Microchip Technology	4.7 V	±5%	500 mW	19 Ω	1.5 V @ 200 mA	-65 to 175°C	DO-35	Active
BZX79C4V7	Taiwan Semiconductor Corporation	4.7 V	±5%	500 mW	80 Ω	1.5 V @ 100 mA	-65 to 175°C	DO-35	Active
1N750	Microchip Technology	4.7 V	±10%	500 mW	19 Ω	1.1 V @ 200 mA	-65 to 175°C	DO-7	Active

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitutes):

1N5230BTR, 1N750A TR PBFREE, and 1N5230B TR PBFREE are parametric equivalents meeting all primary substitution criteria. These parts maintain the 4.7 V nominal zener voltage, ±5% tolerance, 500 mW power rating, 19 Ohm maximum impedance, and -65°C to 200°C operating temperature range. All three are in active product status, ensuring long-term availability.

1N5230BTR (Fairchild Semiconductor) and 1N750A TR PBFREE (Central Semiconductor Corp) are direct functional replacements with identical electrical characteristics to the 1N750ATR.

1N5230B TR PBFREE (Central Semiconductor Corp) is RoHS3 compliant and offers lead-free construction, suitable for applications requiring environmental compliance.

Similar Substitutes (Parameter Variations):

1N5230B (Microchip Technology) operates within the same electrical specifications but with a reduced maximum operating temperature of 175°C compared to the 1N750ATR's 200°C. This part is suitable for applications not requiring the extended upper temperature range.

BZX79C4V7 (Taiwan Semiconductor Corporation) maintains core zener specifications but exhibits higher impedance (80 Ω maximum versus 19 Ω) and reduced forward current rating (100 mA versus 200 mA). This part is RoHS3 compliant and suitable for applications tolerating these parameter variations.

Limited Compatibility:

1N750 (Microchip Technology) features a ±10% tolerance specification versus the ±5% tolerance of the 1N750ATR and uses a DO-7 package instead of DO-35. This part is not recommended as a direct substitute due to tolerance and package differences.

Frequently Asked Questions (FAQ)

Q: Can 1N5230BTR be used as a direct replacement for 1N750ATR?

A: Yes. 1N5230BTR meets all primary substitution criteria: 4.7 V nominal zener voltage, ±5% tolerance, 500 mW power rating, 19 Ohm maximum impedance, DO-35 package, and -65°C to 200°C operating temperature range. The part is in active production status.

Q: What is the difference between 1N750A TR PBFREE and 1N750ATR?

A: 1N750A TR PBFREE is a lead-free variant with identical electrical specifications to 1N750ATR. Both maintain 4.7 V nominal voltage, ±5% tolerance, 500 mW power rating, and -65°C to 200°C operating temperature. The primary difference is RoHS3 compliance and packaging format (cut tape versus bulk).

Q: Why is BZX79C4V7 listed as a similar substitute rather than a parametric equivalent?

A: BZX79C4V7 exhibits two parameter variations: maximum impedance of 80 Ohms (versus 19 Ohms for 1N750ATR) and maximum forward current of 100 mA (versus 200 mA). Additionally, the maximum operating temperature is 175°C rather than 200°C. These variations classify it as a similar substitute suitable for applications tolerating these specifications.

Q: Is 1N750 (Microchip) a suitable substitute?

A: 1N750 is not recommended as a direct substitute. This part features ±10% tolerance specification compared to the ±5% tolerance of 1N750ATR and uses a DO-7 package instead of DO-35. Package incompatibility and tolerance differences make this part unsuitable for direct replacement.

Q: What compliance certifications should I consider when selecting a substitute?

A: The 1N750ATR is REACH unaffected and classified as EAR99. Substitute parts 1N750A TR PBFREE, 1N5230B TR PBFREE, and BZX79C4V7 are RoHS3 compliant, offering environmental compliance advantages. Selection depends on application requirements for lead-free construction and regulatory compliance.

Q: Can I use 1N5230B (Microchip) in applications requiring 200°C operation?

A: 1N5230B has a maximum operating temperature of 175°C, making it unsuitable for applications requiring the full -65°C to 200°C range of the 1N750ATR. Use 1N5230BTR, 1N750A TR PBFREE, or 1N5230B TR PBFREE for extended temperature applications.

Q: What is the inventory status of available substitutes?

A: 1N5230BTR (Fairchild Semiconductor) has 40,300 pieces in stock. 1N750A TR PBFREE (Central Semiconductor Corp) has 32,320 pieces available. 1N5230B TR PBFREE (Central Semiconductor Corp) has 9,462 pieces in stock. BZX79C4V7 (Taiwan Semiconductor Corporation) has 2,700 pieces available. 1N5230B (Microchip Technology) has 1,206 pieces in stock.

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