1N5252B Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5252B is a 24 V, 500 mW Zener diode in DO-35 axial through-hole packaging manufactured by SMC Diode Solutions. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing procurement and design continuity. The 1N5252B functions as a voltage regulation and transient protection element in electronic circuits requiring 24 V reference voltage with moderate power dissipation capability.

Substiute Parts

1N5252B

SMC Diode SolutionsIn Stock: 15041N5252B Datasheet

Current PartRFQ

1N5252B TR PBFREE

Central Semiconductor CorpIn Stock: 91161N5252B TR PBFREE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5252B is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Zener voltage: 24 V nominal
• Tolerance: ±5%
• Maximum power dissipation: 500 mW
• Impedance (maximum): 33 Ohms
• Reverse leakage current: 100 nA specification
• Forward voltage: 1.1 V @ 200 mA

Mechanical Parameters:

• Package type: DO-35 axial through-hole
• Mounting configuration: Through-hole

Environmental & Compliance Parameters:

• Moisture sensitivity: MSL 1 (Unlimited)
• REACH compliance status
• ECCN classification

The substitute part 1N5252B TR PBFREE, manufactured by Central Semiconductor Corp, meets all electrical and mechanical equivalence criteria. This part maintains identical zener voltage, tolerance, power rating, and impedance specifications. The substitute operates across an extended temperature range (−65°C to 200°C) compared to the main part's 200°C maximum, providing enhanced thermal performance. The substitute is classified as active product status with RoHS3 compliance, ensuring long-term availability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

The 1N5252B TR PBFREE manufactured by Central Semiconductor Corp is the direct functional equivalent for the obsolete 1N5252B. This substitute part satisfies all electrical and mechanical requirements for direct replacement in existing designs.

Selection Basis:

1. Electrical Equivalence: All critical electrical parameters—zener voltage (24 V), tolerance (±5%), power rating (500 mW), impedance (33 Ohms), and leakage current (100 nA)—are identical between the main part and substitute.

2. Mechanical Compatibility: Both parts utilize identical DO-35 axial through-hole packaging, ensuring direct PCB footprint compatibility without layout modification.

3. Product Status: The substitute is classified as active product, providing assured long-term availability and supply chain continuity compared to the obsolete main part.

4. Regulatory Compliance: The substitute carries RoHS3 compliance certification, meeting current environmental and regulatory requirements. Both parts maintain REACH unaffected status and identical ECCN/HTSUS classifications.

5. Enhanced Operating Range: The substitute provides extended minimum operating temperature (−65°C versus unspecified for the main part), offering improved thermal performance in low-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can the 1N5252B TR PBFREE be used as a direct replacement for the 1N5252B in existing designs?

A: Yes. The 1N5252B TR PBFREE is electrically and mechanically equivalent. All critical parameters—zener voltage, tolerance, power dissipation, impedance, and leakage current—are identical. The DO-35 axial through-hole package is identical, requiring no PCB modification.

Q: What is the primary advantage of selecting the 1N5252B TR PBFREE over the original 1N5252B?

A: The substitute part is classified as active product status, ensuring ongoing availability and supply chain reliability. The original 1N5252B is obsolete. Additionally, the substitute provides RoHS3 compliance and an extended operating temperature range (−65°C to 200°C).

Q: Are there any electrical performance differences between these parts?

A: No. Both parts maintain identical zener voltage (24 V), tolerance (±5%), maximum power dissipation (500 mW), impedance (33 Ohms), and forward voltage characteristics (1.1 V @ 200 mA). Reverse leakage current specifications are equivalent at 100 nA.

Q: Does the substitute part require any circuit design modifications?

A: No. The 1N5252B TR PBFREE is a direct functional equivalent. No circuit modifications, PCB layout changes, or design parameter adjustments are necessary.

Q: What is the packaging difference between the main part and substitute?

A: Both parts use identical DO-35 axial through-hole packaging. The substitute is supplied in cut tape (CT) format, which is standard for active production parts. This does not affect electrical performance or mechanical compatibility.

Q: Is the 1N5252B TR PBFREE suitable for high-temperature applications?

A: Yes. The substitute part operates to a maximum junction temperature of 200°C, identical to the original part. The extended minimum operating temperature (−65°C) provides additional capability for low-temperature environments.

Q: What compliance certifications apply to the substitute part?

A: The 1N5252B TR PBFREE is RoHS3 compliant and maintains REACH unaffected status. Both parts share identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications.