1N4744A_S00Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4744A_S00Z is a 15 V, 1 W Zener diode manufactured by onsemi in a DO-41 through-hole package. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design and production requirements. The 1N4744A_S00Z maintains electrical specifications suitable for voltage regulation and protection applications within the specified operating temperature range of -65°C to 200°C.

Substiute Parts

1N4744A_S00Z

onsemiIn Stock: 11641N4744A_S00Z Datasheet

Current PartRFQ

1N4744A

Microchip TechnologyIn Stock: 353101N4744A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N4744A_S00Z is determined by strict equivalence across the following critical parameters:

Zener Voltage (Vz): 15 V nominal with ±5% tolerance Power Dissipation (Pmax): 1 W maximum Impedance (Zzt): 14 Ohms maximum Reverse Leakage Current: 5 µA @ 11.4 V Package Type: DO-41 / DO-204AL through-hole axial configuration Mounting: Through-hole technology

The 1N4744A manufactured by Microchip Technology meets all electrical and mechanical parameters required for direct substitution. Both devices share identical zener voltage, power rating, impedance specification, and reverse leakage characteristics. Package compatibility is confirmed through DO-41 and DO-204AL equivalence.

Parameter Comparison

Engineering Selection Recommendations

The 1N4744A manufactured by Microchip Technology is a direct electrical equivalent to the 1N4744A_S00Z. All critical electrical parameters—zener voltage, power rating, impedance, and reverse leakage current—are identical. Package and mounting specifications are fully compatible.

Compliance Considerations:

The Microchip 1N4744A carries RoHS non-compliant status, whereas the onsemi 1N4744A_S00Z does not specify RoHS compliance status. Applications requiring RoHS compliance must evaluate this distinction against regulatory requirements.

Temperature Range Consideration:

The onsemi device operates to 200°C (TJ), while the Microchip substitute operates to 175°C (TJ). For applications requiring operation above 175°C, the Microchip device does not provide equivalent thermal performance. Applications operating within the -65°C to 175°C range experience no functional limitation.

Availability:

The Microchip 1N4744A is discontinued at DiGi Electronics with 35,300 pieces in stock. The onsemi 1N4744A_S00Z is obsolete with 1,141 pieces in stock. Component sourcing strategy should account for current inventory status and long-term availability projections.

Frequently Asked Questions (FAQ)

Q: Can the Microchip 1N4744A directly replace the onsemi 1N4744A_S00Z in all applications?

A: The Microchip 1N4744A provides electrical equivalence across all specified parameters. Direct replacement is valid for applications operating within -65°C to 175°C. Applications requiring operation above 175°C require evaluation of the reduced maximum junction temperature.

Q: Are there package compatibility concerns between DO-41 and DO-204AL designations?

A: DO-41 and DO-204AL are equivalent package designations for axial through-hole diodes. Both devices use identical lead spacing and footprint geometry. PCB layout and assembly processes require no modification.

Q: What is the significance of the ±5% tolerance specification?

A: The ±5% tolerance indicates the zener voltage will fall within the range of 14.25 V to 15.75 V. Both the original and substitute parts share this tolerance specification, ensuring equivalent voltage regulation performance.

Q: Does RoHS non-compliance of the Microchip device affect electrical performance?

A: RoHS compliance status reflects manufacturing process and material composition, not electrical performance. The Microchip device delivers identical electrical specifications. Applications subject to RoHS regulatory requirements must address compliance separately from electrical equivalence.

Q: Are the reverse leakage current specifications identical between devices?

A: Both devices specify 5 µA maximum reverse leakage current measured at 11.4 V. Leakage performance is equivalent across the operating temperature range of each device.

Q: What mounting considerations apply to through-hole axial components?

A: Both devices use through-hole axial leads suitable for insertion into PCB holes and wave soldering or hand soldering processes. Lead diameter, spacing, and mechanical robustness are equivalent. No design modification is required for PCB assembly.