ZMC18 Equivalent & Substitute Parts

Part Overview

The ZMC18 is an 18 V Zener diode manufactured by Diotec Semiconductor, rated for 500 mW power dissipation with ±5% voltage tolerance. This surface mount component operates across the temperature range of -50°C to 175°C and is housed in a SOD-80C package. The part is currently in active production status with 3000 units in stock. Substitute parts are identified to provide design flexibility for procurement, inventory management, and supply chain continuity while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	18	V
Tolerance	±5	%
Power - Maximum	500	mW
Impedance (Maximum)	50	Ohms
Current - Reverse Leakage @ 13 V	100	nA
Operating Temperature Range	-50 to 175	°C
Mounting Type	Surface Mount	—
Package / Case	DO-213AC, MINI-MELF, SOD-80	—
Supplier Device Package	SOD-80C	—

Substitute Part Grouping Explanation

Substitute parts for the ZMC18 are qualified based on matching all critical electrical parameters: nominal Zener voltage of 18 V, voltage tolerance of ±5%, maximum power rating of 500 mW, maximum impedance of 50 Ohms, reverse leakage current of 100 nA at 13 V, and operating temperature range of -50°C to 175°C. All substitute parts maintain identical surface mount technology with SOD-80C package designation. Substitution is valid when the part number, manufacturer designation, and packaging format differ while all specified electrical and mechanical characteristics remain unchanged. The following parameters determine substitution eligibility:

Voltage - Zener (Nominal): 18 V
Tolerance: ±5%
Power - Max: 500 mW
Impedance (Max): 50 Ohms
Current - Reverse Leakage @ Vr: 100 nA @ 13 V
Operating Temperature: -50°C to 175°C
Mounting Type: Surface Mount
Package / Case: SOD-80C

Parameter Comparison

Parameter	ZMC18	ZMM18R13	ZMM18
Manufacturer	Diotec Semiconductor	Diotec Semiconductor	Diotec Semiconductor
Category	Diodes, Zener	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom)	18 V	18 V	18 V
Tolerance	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW
Impedance (Max)	50 Ohms	50 Ohms	50 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 13 V	100 nA @ 13 V	100 nA @ 13 V
Operating Temperature	-50°C ~ 175°C	-50°C ~ 175°C	-50°C ~ 175°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80
Supplier Device Package	SOD-80C	SOD-80C	SOD-80C
Product Status	Active	Active	Active
Inventory (Pcs)	3000	10707	19321
Packaging Format	—	Strip	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

All three part numbers—ZMC18, ZMM18R13, and ZMM18—are manufactured by Diotec Semiconductor and maintain active product status. Selection between these equivalents is determined by packaging and supply requirements rather than electrical performance.

ZMC18 serves as the primary reference part with standard packaging designation. This part is suitable for applications requiring the base SOD-80C configuration.

ZMM18R13 is supplied in Strip packaging format and carries ROHS3 compliance certification. This variant is appropriate for applications subject to RoHS3 regulatory requirements and for procurement workflows utilizing strip-packaged components.

ZMM18 is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, offering the highest inventory availability at 19321 units. This variant accommodates automated assembly processes and high-volume production environments utilizing standard tape-and-reel handling.

All three parts are electrically and mechanically interchangeable within the specified parameter tolerances. Selection should be based on packaging compatibility with assembly equipment, regulatory compliance requirements, and inventory availability.

Frequently Asked Questions (FAQ)

Q: Are ZMC18, ZMM18R13, and ZMM18 electrically interchangeable?

A: Yes. All three parts share identical electrical specifications: 18 V nominal Zener voltage, ±5% tolerance, 500 mW maximum power, 50 Ohms maximum impedance, 100 nA reverse leakage current at 13 V, and -50°C to 175°C operating temperature range. They are direct electrical equivalents.

Q: What is the difference between these part numbers?

A: The primary differences are packaging format and regulatory compliance. ZMC18 uses standard packaging, ZMM18R13 is supplied in Strip format with ROHS3 compliance, and ZMM18 is supplied in Cut Tape and Digi-Reel® formats. All maintain the SOD-80C package designation.

Q: Which part should I select for automated assembly?

A: ZMM18 in Cut Tape and Digi-Reel® format is optimized for automated pick-and-place assembly equipment. This packaging format provides the highest inventory availability and is standard for high-volume production workflows.

Q: Is RoHS3 compliance required for my application?

A: If RoHS3 compliance is mandatory, ZMM18R13 is the appropriate selection. This part carries explicit ROHS3 Compliant certification. ZMC18 and ZMM18 show RoHS status as "Not applicable."

Q: Can I substitute these parts mid-production?

A: Yes, provided your assembly equipment and procurement processes support the packaging format of the substitute part. All three parts are electrically identical and mechanically compatible within the SOD-80C package specification.

Q: What is the maximum reverse leakage current specification?

A: The maximum reverse leakage current is 100 nanoamperes measured at 13 V reverse bias across all three equivalent parts.

Q: Are there any temperature derating considerations?

A: All three parts operate across the identical temperature range of -50°C to 175°C junction temperature. No derating differences exist between the equivalents.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message