MMBZ18VAL-7-F Equivalent & Substitute Parts

Part Overview

The MMBZ18VAL-7-F is a transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 14.5V reverse standoff voltage with a 25V maximum clamping voltage and 1.6A peak pulse current capability in a SOT-23-3 package. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	14.5V
Voltage - Breakdown (Min)	17.1V
Voltage - Clamping (Max) @ Ipp	25V
Current - Peak Pulse (10/1000µs)	1.6A
Power - Peak Pulse	40W
Type	Zener
Unidirectional Channels	2
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
Operating Temperature	-65°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MMBZ18VAL-7-F is determined by strict electrical and mechanical parameter matching:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 14.5V
Voltage - Breakdown (Min): 17.1V
Voltage - Clamping (Max) @ Ipp: 25V
Current - Peak Pulse (10/1000µs): 1.6A
Power - Peak Pulse: 40W
Type: Zener, Unidirectional (2 channels)
Package / Case: TO-236-3, SC-59, SOT-23-3
Mounting Type: Surface Mount

All identified substitute parts maintain identical electrical specifications across these parameters. Packaging format variations (Cut Tape vs. Tape & Reel) and manufacturer differences do not affect functional equivalence. Operating temperature ranges may vary slightly between manufacturers but remain within acceptable industrial and automotive ranges.

Parameter Comparison

Parameter	MMBZ18VAL-7-F (Diodes Inc.)	MMBZ18VALT1G (onsemi)	SZMMBZ18VALT3G (onsemi)	MMBZ18VAL,215 (Nexperia)	SZMMBZ18VALT1G (onsemi)
Manufacturer	Diodes Incorporated	onsemi	onsemi	Nexperia USA Inc.	onsemi
Product Status	Obsolete	Active	Active	Active	Active
Voltage - Reverse Standoff (Typ)	14.5V	14.5V	14.5V	14.5V (Max)	14.5V
Voltage - Breakdown (Min)	17.1V	17.1V	17.1V	17.1V	17.1V
Voltage - Clamping (Max) @ Ipp	25V	25V	25V	25V	25V
Current - Peak Pulse (10/1000µs)	1.6A	1.6A	1.6A	1.6A	1.6A
Power - Peak Pulse	40W	40W	40W	40W	40W
Type	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	2	2	2	2	2
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-65°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TA)	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Automotive Grade	No	No	Yes (AEC-Q101)	Yes (AEC-Q101)	Yes (AEC-Q101)

Engineering Selection Recommendations

All substitute parts listed maintain full electrical and mechanical compatibility with the MMBZ18VAL-7-F. Selection should be based on product availability, supply chain requirements, and application-specific certifications.

MMBZ18VALT1G (onsemi) and SZMMBZ18VALT1G (onsemi) are active products with identical electrical specifications and general-purpose application suitability. These parts differ only in packaging format (Cut Tape vs. Tape & Reel).

SZMMBZ18VALT3G (onsemi) and MMBZ18VAL,215 (Nexperia) carry automotive-grade qualification (AEC-Q101) and are suitable for applications requiring automotive compliance. These parts are recommended for designs targeting automotive or safety-critical environments.

All substitute parts are ROHS3 compliant and carry MSL Level 1 moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can MMBZ18VALT1G directly replace MMBZ18VAL-7-F? A: Yes. MMBZ18VALT1G maintains identical electrical specifications including reverse standoff voltage (14.5V), breakdown voltage (17.1V), clamping voltage (25V), and peak pulse current (1.6A). Both use SOT-23-3 packaging and are surface-mount components.

Q: What is the difference between Cut Tape and Tape & Reel packaging? A: Cut Tape (CT) and Tape & Reel (TR) are packaging and delivery formats only. They do not affect component electrical performance or functionality. Selection depends on manufacturing equipment and production volume requirements.

Q: Are the automotive-grade parts (SZMMBZ18VALT3G, MMBZ18VAL,215) necessary for non-automotive applications? A: No. Automotive-grade qualification (AEC-Q101) is not required for general-purpose applications. Standard-grade substitutes (MMBZ18VALT1G, SZMMBZ18VALT1G) are electrically equivalent and suitable for non-automotive designs.

Q: Does the operating temperature range difference affect substitution? A: The original part specifies -65°C to 150°C (TJ), while substitute parts specify -55°C to 150°C (TJ). The substitute parts have a narrower lower temperature limit. Substitution is appropriate for applications operating within -55°C to 150°C. Applications requiring operation below -55°C require engineering evaluation.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL Level 1 moisture sensitivity, matching the original part specifications.

Q: Which substitute part has the highest inventory availability? A: MMBZ18VALT1G (onsemi) has 125,100 pieces in stock, providing the highest availability among active substitutes.

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