1N4745A Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4745A is a 16 V, 1 W Zener diode in DO-41 axial through-hole packaging manufactured by SMC Diode Solutions. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement. The 1N4745A functions as a voltage regulation and transient protection element in electronic circuits, with electrical characteristics suitable for applications requiring 16 V nominal Zener voltage regulation at 1 W maximum power dissipation.

Substiute Parts

1N4745A

SMC Diode SolutionsIn Stock: 2803071N4745A Datasheet

Current PartRFQ

1N4745A,113

Nexperia USA Inc.In Stock: 21811N4745A,113 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 1N4745A is based on electrical parameter equivalence and mechanical compatibility. The substitute part 1N4745A,113 manufactured by Nexperia USA Inc. maintains identical electrical specifications across all critical parameters: 16 V nominal Zener voltage, ±5% tolerance, 1 W maximum power rating, 16 Ohms maximum impedance, 5 µA reverse leakage current at 12.2 V, and 1.2 V maximum forward voltage at 200 mA. Both parts utilize DO-41 axial through-hole packaging, ensuring mechanical interchangeability in existing circuit board layouts. The substitute part is classified as active product status with RoHS3 compliance, providing long-term availability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

The 1N4745A,113 manufactured by Nexperia USA Inc. is the direct electrical and mechanical equivalent for the obsolete 1N4745A. Selection of this substitute part is based on the following engineering criteria:

All electrical parameters are identical, including Zener voltage, tolerance, power rating, impedance, leakage current, and forward voltage characteristics. The DO-41 axial through-hole package provides direct mechanical compatibility with existing printed circuit board layouts designed for the original part. The substitute part maintains active product status, ensuring continued availability and supply chain reliability. The Nexperia part carries RoHS3 compliance certification, meeting current regulatory requirements for electronic component manufacturing and use. Both parts share identical REACH status and ECCN classification, confirming regulatory equivalence. Moisture sensitivity level remains unchanged at MSL 1 (Unlimited), indicating no special handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can the 1N4745A,113 be used as a direct replacement for the 1N4745A in existing designs?

A: Yes. The 1N4745A,113 is electrically and mechanically equivalent to the 1N4745A. All electrical parameters, including Zener voltage (16 V), power rating (1 W), impedance (16 Ohms), and forward voltage characteristics are identical. The DO-41 axial through-hole package ensures direct compatibility with existing circuit board layouts without modification.

Q: What is the primary reason for substituting the 1N4745A?

A: The 1N4745A is classified as obsolete product status. The 1N4745A,113 is an active equivalent part that provides continued availability and long-term supply chain support.

Q: Are there any differences in operating temperature range between the two parts?

A: The 1N4745A specifies a maximum operating temperature of 200°C. The 1N4745A,113 specifies an operating temperature range of -65°C to 200°C. This expanded range in the substitute part does not affect compatibility in applications using the original part's temperature specifications.

Q: Does the substitute part meet current regulatory requirements?

A: Yes. The 1N4745A,113 is RoHS3 compliant and maintains REACH Unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

Q: Is the packaging identical between the two parts?

A: Yes. Both parts use DO-204AL, DO-41 axial through-hole packaging. The mechanical dimensions and lead configuration are identical, allowing direct substitution without circuit board redesign.

Q: What is the moisture sensitivity level for the substitute part?

A: The 1N4745A,113 has a moisture sensitivity level of 1 (Unlimited), identical to the original part. This indicates no special moisture control requirements during storage or assembly.

Q: Are there inventory differences between the original and substitute parts?

A: The original 1N4745A has 280,199 pieces in stock (obsolete status). The 1N4745A,113 has 2,100 pieces in stock and is classified as active product, ensuring ongoing availability.