1N5244 Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5244 is a through-hole zener diode rated at 14 V nominal voltage with 500 mW maximum power dissipation in a DO-35 axial package. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement. The 1N5244 series remains functionally relevant for legacy circuit maintenance and new designs requiring this specific voltage regulation characteristic.

Substiute Parts

1N5244

SMC Diode SolutionsIn Stock: 49131N5244 Datasheet

Current PartRFQ

1N5244B TR PBFREE

Central Semiconductor CorpIn Stock: 82271N5244B TR PBFREE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5244 zener diode is determined by electrical and mechanical parameter alignment within the following criteria:

Primary Substitution Parameters:

• Zener voltage: 14 V nominal
• Maximum power dissipation: 500 mW
• Package type: DO-35 axial through-hole
• Impedance (maximum): 15 Ohms
• Reverse leakage current: 100 nA @ 10 V
• Forward voltage: 1.1 V @ 200 mA

Secondary Compatibility Factors:

• Mounting configuration: Through-hole axial orientation
• Moisture sensitivity: MSL 1 (Unlimited)
• Environmental compliance: REACH Unaffected, EAR99 classification

The 1N5244B TR PBFREE from Central Semiconductor Corp meets all primary electrical parameters and maintains identical mechanical packaging. This part is classified as active product status, providing long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The 1N5244B TR PBFREE from Central Semiconductor Corp is the direct functional equivalent for the obsolete 1N5244. Selection of this substitute is based on the following engineering factors:

Electrical Equivalence: All critical electrical parameters match exactly, including zener voltage, power rating, impedance, leakage current, and forward voltage characteristics. The substitute provides an explicit ±5% voltage tolerance specification, which enhances design predictability.

Mechanical Compatibility: Both parts utilize identical DO-35 axial through-hole packaging, ensuring direct board-level substitution without layout modification.

Product Status and Supply: The 1N5244B TR PBFREE is classified as active product status with 8,198 units in stock, providing immediate availability and long-term procurement security compared to the obsolete 1N5244.

Compliance and Certifications: The substitute meets ROHS3 compliance and maintains REACH Unaffected status, aligning with current regulatory requirements. Both parts carry EAR99 export classification and identical HTSUS tariff codes.

Operating Temperature: The substitute provides an extended operating temperature range of -65°C to 200°C, compared to the main part specification of 200°C maximum, offering broader environmental applicability.

Frequently Asked Questions (FAQ)

Q: Can the 1N5244B TR PBFREE be used as a direct replacement for the 1N5244?

A: Yes. The 1N5244B TR PBFREE meets all electrical and mechanical specifications of the 1N5244. Both parts share identical zener voltage (14 V), power rating (500 mW), impedance (15 Ohms), and DO-35 axial package configuration. No circuit modification is required.

Q: What is the significance of the ±5% tolerance specification on the 1N5244B TR PBFREE?

A: The ±5% tolerance on the substitute part provides explicit voltage regulation accuracy. This specification ensures the zener voltage remains within 13.3 V to 14.7 V across the rated operating range. The original 1N5244 does not specify tolerance, making the substitute more suitable for precision voltage regulation applications.

Q: Are there packaging differences between the 1N5244 and 1N5244B TR PBFREE?

A: No. Both parts use the DO-35 axial through-hole package. The "TR" designation on the substitute indicates Cut Tape packaging format, which is a supply format difference only and does not affect component form factor or board-level installation.

Q: What does "PBFREE" mean on the 1N5244B TR PBFREE part number?

A: PBFREE indicates the component is manufactured without lead (Pb) in the solder or plating, complying with RoHS3 regulations. This is a manufacturing process specification and does not affect electrical performance or compatibility.

Q: Is the extended operating temperature range of the 1N5244B TR PBFREE (-65°C to 200°C) a functional advantage?

A: The extended lower temperature limit of -65°C provides operational capability in cold environments. The original 1N5244 specification lists 200°C as a maximum value without specifying a lower limit. For applications requiring operation below ambient temperature, the substitute offers broader environmental coverage.

Q: What is the difference between the 1N5244B TR PBFREE and 1N5244BTR mentioned in the substitute list?

A: The 1N5244BTR is listed as an additional substitute option. Both variants share identical electrical specifications. The difference is in packaging format or supply configuration. Consult specific datasheets for packaging format details.

Q: Can the 1N5244 be used in new designs, or should the 1N5244B TR PBFREE be selected?

A: The 1N5244B TR PBFREE is the appropriate choice for new designs. The original 1N5244 is classified as obsolete, indicating discontinued manufacturing and limited future availability. The substitute is active product status with confirmed stock levels and long-term supply continuity.

Q: Are there compliance or regulatory differences between the two parts?

A: The 1N5244B TR PBFREE provides explicit ROHS3 compliance certification, whereas the original 1N5244 does not specify RoHS status. Both parts are REACH Unaffected and carry identical EAR99 export classification. For applications requiring RoHS compliance documentation, the substitute is the appropriate selection.