1N5352B Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5352B is a 15 V, 5 W axial zener diode manufactured by onsemi, designed for through-hole applications. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and production needs. The 1N5352B operates across a temperature range of -65°C to 200°C with ±5% voltage tolerance and is RoHS non-compliant. Equivalent parts maintain identical electrical specifications, while substitute parts offer functional alternatives with modified parameters suitable for specific application requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	15	V
Power - Max	5	W
Tolerance	±5%	—
Impedance (Max)	2.5	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 11.5 V
Voltage - Forward (Vf) (Max) @ If	1.2	V @ 1 A
Operating Temperature	-65 to 200	°C
Mounting Type	Through Hole	—
Package / Case	T-18, Axial	—

Substitute Part Grouping Explanation

Substitution of the 1N5352B is determined by alignment of critical electrical and mechanical parameters. The primary substitution criteria are:

Direct Equivalents maintain all electrical specifications: 15 V nominal zener voltage, 5 W maximum power dissipation, ±5% tolerance, 2.5 Ohms maximum impedance, and through-hole axial mounting. These parts differ only in packaging format (bulk, tape & reel, cut tape) or manufacturer source while preserving functional performance.

Similar Substitutes share the 15 V zener voltage and through-hole axial mounting but operate at reduced power levels (500 mW to 1 W) or modified impedance characteristics. These parts are suitable for applications where the full 5 W power rating is not required. Tolerance variations (±1%, ±5%, ±10%) and impedance differences (14 to 100 Ohms) distinguish these alternatives.

Key Parameters for Substitution:

Voltage - Zener (Nom): 15 V (required match)
Mounting Type: Through Hole (required match)
Package / Case: Axial configuration (required match)
Power - Max: 5 W (direct equivalents) or reduced (similar substitutes)
Operating Temperature Range: Minimum -65°C required
Tolerance: ±5% or tighter acceptable

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Power (W)	Tolerance	Zzt (Ohms)	Vf @ If (V)	Temp Range (°C)	Package	Product Status
1N5352B	onsemi	15	5	±5%	2.5	1.2 @ 1 A	-65 to 200	T-18, Axial	Obsolete
1N5352BG	onsemi	15	5	±5%	2.5	1.2 @ 1 A	-65 to 200	T-18, Axial	Active
1N5352B	Diotec Semiconductor	15	5	±5%	2.5	—	-50 to 150	DO-201AA, Axial	Active
1N5352B/TR12	Microchip Technology	15	5	±5%	2.5	1.2 @ 1 A	-65 to 150	T-18, Axial	Active
1N4109-1	Microchip Technology	15	0.5	±5%	100	1.1 @ 200 mA	-65 to 175	DO-35, Axial	Active
1N4109D	Microchip Technology	15	0.5	±1%	100	1.1 @ 200 mA	-65 to 175	DO-7, Axial	Active
1N4109D-1	Microchip Technology	15	0.5	±1%	100	1.1 @ 200 mA	-65 to 175	DO-35, Axial	Active
1N4744AE3/TR13	Microchip Technology	15	1	±5%	14	1.2 @ 200 mA	-65 to 150	DO-41, Axial	Active
1N5245	Microchip Technology	15	0.5	±5%	16	1.5 @ 200 mA	-65 to 175	DO-35, Axial	Active
1N5245A	Microchip Technology	15	0.5	±10%	16	1.5 @ 200 mA	-65 to 175	DO-35, Axial	Active
1N5245D	Microchip Technology	15	0.5	±1%	16	1.5 @ 200 mA	-65 to 175	DO-35, Axial	Active

Engineering Selection Recommendations

Direct Equivalent Selection:

The 1N5352BG (onsemi, active status) is the primary direct equivalent to the obsolete 1N5352B. This part maintains identical electrical specifications: 15 V zener voltage, 5 W power rating, ±5% tolerance, 2.5 Ohms impedance, and -65°C to 200°C operating range. The 1N5352BG is available in bulk packaging and holds active product status with ROHS3 compliance, making it suitable for new designs and production continuity.

The 1N5352B/TR12 (Microchip Technology, active status) provides an alternative direct equivalent in tape & reel packaging format. This variant maintains the same electrical performance with identical zener voltage, power rating, and impedance. Operating temperature range extends to -65°C to 150°C, which covers most industrial applications. This part is RoHS non-compliant but offers 3,768 units in current inventory.

The 1N5352B from Diotec Semiconductor (active status, cut tape packaging) represents a third direct equivalent source. This variant operates across -50°C to 150°C, which is narrower than the original specification but acceptable for applications not requiring the full -65°C lower limit. Diotec's version maintains all critical electrical parameters.

Similar Substitute Selection:

For applications where 5 W power dissipation exceeds actual requirements, the 1N4744AE3/TR13 (Microchip Technology, 1 W, ±5% tolerance) provides a reduced-power alternative. This part maintains 15 V zener voltage and ±5% tolerance with improved impedance characteristics (14 Ohms). Operating temperature range of -65°C to 150°C and ROHS3 compliance support modern design standards.

The 1N5245 series (Microchip Technology, 500 mW) offers further power reduction for low-current applications. Available in three tolerance grades (±5%, ±10%, ±1%), these parts provide flexibility in precision requirements. The 1N5245D variant with ±1% tolerance and ROHS3 compliance is recommended for precision voltage regulation circuits.

Lower-power alternatives including 1N4109-1, 1N4109D, and 1N4109D-1 (500 mW) are suitable only for applications with minimal current draw. These parts feature higher impedance (100 Ohms) and reduced reverse leakage characteristics, making them unsuitable for high-current zener regulation applications.

Compliance Considerations:

The 1N5352B is RoHS non-compliant. For new designs subject to RoHS requirements, the 1N5352BG (ROHS3 compliant) or 1N5352B/TR12 from Microchip provide compliant alternatives. The 1N4744AE3/TR13 and 1N5245D also meet ROHS3 standards.

Frequently Asked Questions (FAQ)

Q: Can the 1N5352BG directly replace the obsolete 1N5352B?

A: Yes. The 1N5352BG maintains identical electrical specifications: 15 V zener voltage, 5 W power rating, ±5% tolerance, 2.5 Ohms impedance, and -65°C to 200°C operating temperature. The only difference is packaging format (bulk versus original specification) and active product status. Pin configuration and functional performance are identical.

Q: What is the difference between direct equivalents and similar substitutes?

A: Direct equivalents (1N5352BG, 1N5352B/TR12, Diotec 1N5352B) maintain the full 5 W power rating and all electrical specifications of the original 1N5352B. Similar substitutes (1N4744AE3/TR13, 1N5245 series) operate at reduced power levels (1 W or 500 mW) and are suitable only for applications where lower power dissipation is acceptable. Impedance and reverse leakage characteristics also differ in similar substitutes.

Q: Can I use a 500 mW zener diode instead of the 5 W 1N5352B?

A: Only if your application requires less than 500 mW power dissipation. The 1N5245 series and 1N4109 variants are rated for 500 mW maximum. Using an undersized component in a 5 W application will cause thermal failure. Verify actual power dissipation requirements before selecting a reduced-power substitute.

Q: What is the operating temperature difference between the 1N5352B and 1N5352B/TR12?

A: The original 1N5352B operates from -65°C to 200°C. The 1N5352B/TR12 (Microchip) operates from -65°C to 150°C. The upper temperature limit is reduced by 50°C. For applications requiring operation above 150°C, the onsemi 1N5352BG is required.

Q: Are there RoHS-compliant alternatives to the 1N5352B?

A: Yes. The 1N5352BG (onsemi, ROHS3 compliant) is the primary RoHS-compliant direct equivalent. The 1N4744AE3/TR13 (1 W, ROHS3 compliant) and 1N5245D (500 mW, ROHS3 compliant) provide RoHS-compliant alternatives at reduced power ratings.

Q: What packaging formats are available for the 1N5352B equivalent?

A: Direct equivalents are available in bulk, tape & reel (TR), and cut tape (CT) formats. All maintain the T-18 or DO-201AA axial package configuration required for through-hole mounting. The Diotec variant uses DO-201AA designation, while onsemi and Microchip variants use T-18 designation. Both are mechanically and electrically compatible.

Q: Can I substitute the 1N5352B with a 1N4744AE3/TR13?

A: Only if your circuit operates at power levels below 1 W. The 1N4744AE3/TR13 is rated for 1 W maximum, compared to 5 W for the 1N5352B. The impedance is also lower (14 Ohms versus 2.5 Ohms), which affects voltage regulation characteristics. Verify circuit requirements before substitution.

Q: What is the inventory status of 1N5352B equivalents?

A: The 1N5352BG has 1,208 units in stock. The 1N5352B/TR12 (Microchip) has 3,768 units available. The Diotec 1N5352B has 1,890 units in stock. All direct equivalents are currently available from inventory.

Q: Does the 1N5352B require any special handling or storage conditions?

A: The 1N5352B has Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life with no special moisture control required. Standard electronic component storage conditions apply.

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