Equivalent & Substitute Parts for 1N5740C Zener Diode

Part Overview

The 1N5740C by Microchip Technology is a Zener diode designed for voltage regulation applications, featuring a nominal Zener voltage of 15 V, 500 mW maximum power dissipation, and tight ±1% voltage tolerance in a DO-204AH (DO-35, Axial) through-hole package. This component is currently active but is designated as RoHS non-compliant, requiring consideration of substitute parts for designs or supply chains with environmental or regulatory requirements, or for increased sourcing flexibility due to inventory constraints.

Key Parameters

Parameter	1N5740C Value
Voltage - Zener (Nom) (Vz)	15 V
Tolerance	±1%
Power - Max	500 mW
Impedance (Max) (Zzt)	30 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 10 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-65°C ~ 175°C
Mounting Type	Through Hole
Package / Case	DO-204AH, DO-35, Axial
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the 1N5740C Zener diode is determined by direct matching of electrical and mechanical parameters relevant to Zener diodes in the through-hole DO-204AH (DO-35) package. Explicit key parameters used in establishing equivalency include: Zener voltage (15 V), maximum power dissipation, Zener impedance, tolerance, through-hole axial DO-35 (DO-204AH) package, and operating temperature range. Product compliance (RoHS, REACH), and inventory status are also considered.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	I_R @ V_R	V_F (Max) @ I_F	Operating Temp	Mounting Type	Package / Case	RoHS Status
1N5740C	Microchip Technology	15 V	±1%	500 mW	30 Ohms	100 nA @ 10 V	900 mV @ 10 mA	-65°C ~ 175°C	Through Hole	DO-204AH, DO-35, Axial	RoHS non-compliant
1N5245B	Microchip Technology	15 V	±5%	500 mW	16 Ohms	100 nA @ 11 V	1.5 V @ 200 mA	-65°C ~ 175°C (TJ)	Through Hole	DO-204AH, DO-35, Axial	RoHS non-compliant
1N5245BTR	onsemi	15 V	±5%	500 mW	16 Ohms	100 nA @ 11 V	1.2 V @ 200 mA	-65°C ~ 200°C	Through Hole	DO-204AH, DO-35, Axial	ROHS3 Compliant
BZX79-B15,113	Nexperia USA Inc.	15 V	±2%	400 mW	30 Ohms	50 nA @ 10.5 V	900 mV @ 10 mA	-65°C ~ 200°C (TJ)	Through Hole	DO-204AH, DO-35, Axial	ROHS3 Compliant
BZX79-B15,133	Nexperia USA Inc.	15 V	±2%	400 mW	30 Ohms	50 nA @ 10.5 V	900 mV @ 10 mA	-65°C ~ 200°C	Through Hole	DO-204AH, DO-35, Axial	ROHS3 Compliant

Engineering Selection Recommendations

Compliance, product status, and environmental certifications vary across substitute parts. The 1N5740C and 1N5245B are RoHS non-compliant, suitable for applications where RoHS requirements are not mandatory. The 1N5245BTR, BZX79-B15,113, and BZX79-B15,133 are ROHS3 Compliant and are suitable when environmental compliance is required. All listed substitutes are active and available in through-hole DO-35 packages as specified.

Frequently Asked Questions (FAQ)

Q1: What criteria are used to establish a Zener diode substitute for the 1N5740C?
A1: Substitution is based on matching Zener voltage, tolerance range, maximum power rating, package type (DO-204AH, DO-35, Axial), and operating temperature. Regulatory compliance is also considered.

Q2: Are there differences in tolerance or power handling among substitute parts?
A2: Tolerances in listed substitutes range from ±1% to ±5%. Power handling is 500 mW for most, with BZX79-B15 variants at 400 mW. Careful parameter matching is necessary for critical designs.

Q3: Do all substitutes offer the same mounting and package style?
A3: Yes, all substitutes are available in through-hole DO-204AH, DO-35, Axial packages.

Q4: How does RoHS compliance impact selection?
A4: For projects required to meet RoHS or other environmental standards, select only those parts that are explicitly marked ROHS3 Compliant.

Q5: Should operating temperature differences be considered?
A5: The main part and substitutes specify similar wide operating temperature ranges, with substitutes in some cases supporting up to 200°C.

Q6: Is the reverse leakage current specification comparable?
A6: There are minor differences; substitute parts have reverse leakage currents rated at slightly different test voltages, but values are otherwise similar within the specified conditions.

Q7: Why is it necessary to identify substitutes for the 1N5740C?
A7: Substitutes are required for supply chain flexibility, compliance requirements, or when targeting specific inventory levels or environmental standards.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message