1N5252C-TAP Equivalent & Substitute Parts

Part Overview

The 1N5252C-TAP is a 24 V, 500 mW Zener diode manufactured by Vishay General Semiconductor - Diodes Division in DO-35 (DO-204AH) axial through-hole package. This component is classified as an active product with AEC-Q101 automotive qualification and ROHS3 compliance. The 1N5252C-TAP features ±2% voltage tolerance and is suitable for voltage regulation and protection applications in automotive and industrial circuits. Equivalent and substitute parts are identified based on matching nominal Zener voltage, power dissipation capability, package type, and electrical performance parameters.

Key Parameters

Parameter	1N5252C-TAP
Voltage - Zener (Nom)	24 V
Tolerance	±2%
Power - Max	500 mW
Impedance (Max)	33 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 18 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA
Operating Temperature	175°C
Package / Case	DO-204AH, DO-35, Axial
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitution of the 1N5252C-TAP is determined by the following critical parameters:

Primary Matching Criteria:

Nominal Zener voltage of 24 V
Through-hole axial mounting configuration
DO-35 or DO-204AH package compatibility

Secondary Compatibility Factors:

Power dissipation rating (500 mW minimum for direct substitution)
Impedance characteristics (Zzt maximum 33 Ohms for 500 mW devices)
Reverse leakage current specifications
Forward voltage characteristics
Operating temperature range

Substitute parts are grouped into two categories based on power rating:

Category 1: 500 mW Zener Diodes (Direct Substitutes) Parts with 500 mW power rating and DO-35 package maintain electrical equivalence with the 1N5252C-TAP. These include 1N5252B, 1N5252B TR PBFREE, and 1N5252BTR. Voltage tolerance variations (±5% versus ±2%) represent the primary electrical difference within this category.

Category 2: Higher Power Zener Diodes (Functional Alternatives) Parts with power ratings exceeding 500 mW (3 W and 5 W devices) provide functional substitution for applications where higher power dissipation capability is required. These include 1N5934BRNG (3 W, DO-41 package) and 1N5359B/TR12 (5 W, T-18 package). Package differences necessitate circuit board layout modifications.

Category 3: Lower Power Zener Diodes (Restricted Substitution) Parts with 400 mW power rating (BZX79-B24,113 and BZX79-B24,143) provide substitution only for applications with reduced power dissipation requirements. These devices operate within tighter thermal constraints.

Parameter Comparison

Parameter	1N5252C-TAP	1N5252B	1N5252B TR PBFREE	1N5252BTR	1N5359B/TR12	1N5934BRNG	BZX79-B24,113	BZX79-B24,143
Voltage - Zener (Nom)	24 V	24 V	24 V	24 V	24 V	24 V	24 V	24 V
Tolerance	±2%	±5%	±5%	±5%	±5%	±5%	±2%	±2%
Power - Max	500 mW	500 mW	500 mW	500 mW	5 W	3 W	400 mW	400 mW
Impedance (Max)	33 Ohms	33 Ohms	33 Ohms	33 Ohms	3.5 Ohms	19 Ohms	70 Ohms	70 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 18 V	100 nA @ 18 V	100 nA @ 18 V	100 nA @ 18 V	500 nA @ 17.3 V	1 µA @ 18.2 V	50 nA @ 16.8 V	50 nA @ 16.8 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	1.5 V @ 200 mA	1.1 V @ 200 mA	1.2 V @ 200 mA	1.2 V @ 1 A	1.5 V @ 200 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	175°C	-65°C ~ 175°C	-65°C ~ 200°C	-65°C ~ 200°C	-65°C ~ 150°C	-65°C ~ 200°C	-65°C ~ 200°C	-65°C ~ 200°C
Package / Case	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	T-18, Axial	DO-204AL, DO-41, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitution (500 mW, DO-35 Package):

The 1N5252B TR PBFREE and 1N5252BTR are suitable direct substitutes for the 1N5252C-TAP in applications where voltage tolerance relaxation from ±2% to ±5% is acceptable. Both parts maintain identical power dissipation (500 mW), impedance (33 Ohms), and package configuration. The 1N5252B TR PBFREE offers ROHS3 compliance and extended operating temperature range (-65°C to 200°C), providing enhanced environmental performance. The 1N5252BTR from onsemi similarly provides ROHS3 compliance with comparable electrical characteristics.

The 1N5252B from Microchip Technology is available in bulk packaging and maintains electrical equivalence but carries RoHS non-compliance status, limiting applicability in regulated environments.

Higher Power Substitution (3 W and 5 W Devices):

The 1N5934BRNG (3 W, DO-41 package) and 1N5359B/TR12 (5 W, T-18 package) provide functional alternatives for applications requiring increased power dissipation capability. These devices maintain 24 V nominal Zener voltage but require circuit board layout modifications due to different package geometries. The 1N5934BRNG offers ROHS3 compliance and -65°C to 200°C operating range. The 1N5359B/TR12 carries RoHS non-compliance status and operates to 150°C maximum.

Lower Power Substitution (400 mW Devices):

The BZX79-B24,113 and BZX79-B24,143 provide substitution only for applications with reduced power dissipation requirements below 500 mW. Both maintain ±2% voltage tolerance matching the 1N5252C-TAP and operate across -65°C to 200°C. The BZX79-B24,143 offers ROHS3 compliance and Tape & Box packaging. These devices exhibit higher impedance (70 Ohms maximum) and lower forward voltage characteristics compared to the primary part.

Compliance Considerations:

Applications requiring ROHS3 compliance should prioritize 1N5252B TR PBFREE, 1N5252BTR, 1N5934BRNG, or BZX79-B24,143. Applications requiring AEC-Q101 automotive qualification should reference the original 1N5252C-TAP specification, as substitute part automotive qualification status is not provided in the available data.

Frequently Asked Questions (FAQ)

Q: Can the 1N5252B replace the 1N5252C-TAP in all applications?

A: The 1N5252B provides electrical substitution with the primary limitation of ±5% voltage tolerance versus the ±2% tolerance of the 1N5252C-TAP. Applications requiring tighter voltage regulation should evaluate tolerance impact on circuit performance. Additionally, the 1N5252B carries RoHS non-compliance status, restricting use in regulated environments.

Q: What is the difference between 1N5252B TR PBFREE and 1N5252BTR?

A: Both parts maintain identical electrical specifications (24 V, 500 mW, ±5% tolerance, DO-35 package) and ROHS3 compliance. The primary differences are manufacturer (Central Semiconductor Corp versus onsemi) and packaging format (Cut Tape versus Cut Tape). Forward voltage characteristics differ slightly (1.1 V versus 1.2 V @ 200 mA). Selection should be based on supplier availability and packaging requirements.

Q: Can higher power devices (1N5934BRNG, 1N5359B/TR12) be used as direct replacements?

A: Higher power devices provide functional substitution for voltage regulation but require circuit board layout modifications due to different package types (DO-41 and T-18 versus DO-35). These devices are suitable only when the application can accommodate physical package changes and when increased power dissipation capability is beneficial or required.

Q: Are the BZX79-B24,113 and BZX79-B24,143 suitable substitutes?

A: These 400 mW devices provide substitution only for applications with power dissipation requirements below 500 mW. They maintain ±2% voltage tolerance and DO-35 package compatibility but exhibit higher impedance (70 Ohms) and different forward voltage characteristics. Use is restricted to circuits where reduced power handling does not compromise performance.

Q: What packaging options are available for 24 V, 500 mW Zener diodes?

A: The 1N5252 series in 500 mW rating is available exclusively in DO-35 (DO-204AH) axial through-hole package. Higher power alternatives utilize different packages: 1N5934BRNG uses DO-41, and 1N5359B/TR12 uses T-18. Package selection depends on circuit board layout constraints and thermal management requirements.

Q: How does voltage tolerance affect circuit design?

A: The 1N5252C-TAP provides ±2% tolerance, establishing a Zener voltage range of 23.52 V to 24.48 V. Substitute parts with ±5% tolerance establish a range of 22.8 V to 25.2 V. Applications requiring precise voltage regulation should account for this expanded tolerance band in circuit calculations and component selection.

Q: What is the significance of impedance (Zzt) specifications?

A: Impedance (Zzt) characterizes the dynamic resistance of the Zener diode at specified operating conditions. Lower impedance values (3.5 Ohms for 1N5359B/TR12) indicate better voltage regulation under load variations. Higher impedance values (70 Ohms for BZX79 series) result in greater voltage variation with current changes. Selection should align with circuit regulation requirements.

Q: Are there temperature range differences between substitutes?

A: The 1N5252C-TAP operates to 175°C maximum. Most substitutes extend to 200°C (1N5252B TR PBFREE, 1N5252BTR, 1N5934BRNG, BZX79 series), providing enhanced thermal margin. The 1N5359B/TR12 operates only to 150°C, restricting use in high-temperature applications. Operating temperature selection should account for circuit ambient conditions and component self-heating.

Q: What compliance certifications should be verified for automotive applications?

A: The 1N5252C-TAP carries AEC-Q101 automotive qualification. Substitute part automotive qualification status is not provided in available specifications. Applications requiring automotive-grade components should confirm AEC-Q101 compliance with manufacturers before implementation.

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