MMBZ27VAL-7 Equivalent & Substitute Parts

Part Overview

The MMBZ27VAL-7 is a 22V Zener transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in SOT-23-3 surface mount packaging. This component is designed for general-purpose transient voltage suppression applications with a 40V clamping voltage and 1A peak pulse current rating. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	22V
Voltage - Breakdown (Min)	25.65V
Voltage - Clamping (Max) @ Ipp	40V
Current - Peak Pulse (10/1000µs)	1A
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)

Substitute Part Grouping Explanation

Substitution for the MMBZ27VAL-7 is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff: 22V
Voltage - Breakdown (Min): 25.65V
Voltage - Clamping (Max) @ Ipp: 40V
Current - Peak Pulse (10/1000µs): 1A
Power - Peak Pulse: 40W
Type: Zener
Unidirectional Channels: 2
Package / Case: TO-236-3, SC-59, SOT-23-3

All identified substitute parts meet these electrical specifications and are compatible with the same PCB footprint and assembly process. Substitutes differ in manufacturer, product status, compliance certifications, and packaging format.

Parameter Comparison

Parameter	MMBZ27VAL-7 (Diodes Inc.)	MMBZ27VAL,215 (Nexperia)	MMBZ27VAL,235 (Nexperia)	MMBZ27VALT1G (onsemi)	SZMMBZ27VALT1G (onsemi)
Manufacturer	Diodes Incorporated	Nexperia USA Inc.	Nexperia USA Inc.	onsemi	onsemi
Voltage - Reverse Standoff (Typ)	22V	22V (Max)	22V (Max)	22V	22V
Voltage - Breakdown (Min)	25.65V	25.65V	25.65V	25.65V	25.65V
Voltage - Clamping (Max) @ Ipp	40V	40V	40V	40V	40V
Current - Peak Pulse (10/1000µs)	1A	1A	1A	1A	1A
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 (TA)	-55°C ~ 150°C (TA)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)
Product Status	Discontinued	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q101 Qualification	Not specified	Yes	Yes	No	Yes
Inventory Status	12,300 Pcs	20,760 Pcs	10,808 Pcs	671,866 Pcs	1,005,400 Pcs

Engineering Selection Recommendations

All substitute parts are electrically equivalent to the MMBZ27VAL-7 and share identical functional specifications. Selection should be based on the following criteria:

For RoHS3 Compliance Requirements: MMBZ27VAL,215, MMBZ27VAL,235, MMBZ27VALT1G, and SZMMBZ27VALT1G are all ROHS3 compliant, whereas the original MMBZ27VAL-7 is RoHS non-compliant.

For Automotive Applications: MMBZ27VAL,215, MMBZ27VAL,235, and SZMMBZ27VALT1G carry AEC-Q101 qualification, suitable for automotive-grade requirements. MMBZ27VALT1G does not specify AEC-Q101 qualification.

For Availability: SZMMBZ27VALT1G (onsemi) offers the highest inventory level at 1,005,400 pieces, followed by MMBZ27VALT1G (onsemi) at 671,866 pieces. Nexperia parts offer lower but adequate stock levels.

For Temperature Range: The original part specifies -65°C to 150°C (TJ). All substitutes specify -55°C to 150°C (TA), representing a narrower low-temperature range. Applications requiring operation below -55°C should be evaluated against actual thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can MMBZ27VAL,215 or MMBZ27VAL,235 be used as direct replacements for MMBZ27VAL-7?

A: Yes. Both Nexperia parts are electrically equivalent with identical voltage and current ratings. They share the same TO-236-3/SOT-23-3 package and are pin-compatible. The primary differences are manufacturer, product status (both active), and compliance certifications (both ROHS3 compliant and AEC-Q101 qualified).

Q: What is the difference between MMBZ27VALT1G and SZMMBZ27VALT1G?

A: Both are onsemi products with identical electrical specifications and packaging. SZMMBZ27VALT1G carries AEC-Q101 automotive qualification, while MMBZ27VALT1G does not specify this certification. SZMMBZ27VALT1G also has significantly higher inventory availability.

Q: Are there any temperature range limitations when substituting?

A: The original MMBZ27VAL-7 specifies -65°C to 150°C (TJ). All substitutes specify -55°C to 150°C (TA). Applications requiring operation below -55°C should confirm thermal performance against actual circuit requirements.

Q: Which substitute offers the best long-term availability?

A: SZMMBZ27VALT1G (onsemi) offers the highest inventory level and active product status, making it the most suitable choice for long-term production continuity.

Q: Are all substitutes compatible with existing PCB layouts?

A: Yes. All substitute parts use the TO-236-3/SOT-23-3 package with identical pin configuration and footprint, requiring no PCB redesign.

Q: Do all substitutes meet RoHS requirements?

A: All four substitute parts are ROHS3 compliant. The original MMBZ27VAL-7 is RoHS non-compliant. If RoHS compliance is required, any of the four substitutes are suitable.

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