MMBZ15VAL-7 Equivalent & Substitute Parts

Part Overview

The MMBZ15VAL-7 is a 12V Transient Voltage Suppressor (TVS) diode manufactured by Diodes Incorporated in SOT-23-3 surface mount packaging. This unidirectional Zener diode is designed for general-purpose transient voltage suppression with a 21V clamping voltage and 1.9A peak pulse current rating. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design requirements and production needs.

Substiute Parts

MMBZ15VAL-7

Diodes IncorporatedIn Stock: 12975MMBZ15VAL-7 Datasheet

Current PartRFQ

ESDA14V2L

STMicroelectronicsIn Stock: 385441ESDA14V2L Datasheet

MFR RecommendedRFQ

MMBZ15VAL,215

Nexperia USA Inc.In Stock: 10389MMBZ15VAL,215 Datasheet

MFR RecommendedRFQ

MMBZ15VALT1G

onsemiIn Stock: 71144MMBZ15VALT1G Datasheet

MFR RecommendedRFQ

SM12.TCT

SemtechIn Stock: 134297SM12.TCT Datasheet

MFR RecommendedRFQ

SM12T1G

onsemiIn Stock: 125476SM12T1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MMBZ15VAL-7 is determined by the following critical parameters:

Primary Matching Criteria:

• Unidirectional Channels: 2
• Voltage - Reverse Standoff (Typ): 12V
• Mounting Type: Surface Mount
• Package / Case: SOT-23-3 (TO-236-3, SC-59)

Secondary Compatibility Parameters:

• Voltage - Breakdown (Min): 14.25V ± tolerance
• Voltage - Clamping (Max) @ Ipp: 21V or lower
• Current - Peak Pulse: 1.9A or higher
• Power - Peak Pulse: 40W or higher

Substitute parts are grouped into two categories based on electrical performance alignment:

Group 1 - Direct Electrical Equivalents: Parts matching the 21V clamping voltage and 1.9A peak pulse current specifications (MMBZ15VAL,215, MMBZ15VALT1G).

Group 2 - Functional Alternatives: Parts with different clamping voltage (19V) and higher peak pulse current (12A) but maintaining the 12V standoff voltage and SOT-23-3 package (SM12.TCT, SM12T1G, ESDA14V2L).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

MMBZ15VAL,215 (Nexperia USA Inc.) and MMBZ15VALT1G (onsemi) are direct electrical equivalents to the MMBZ15VAL-7. Both maintain the 21V clamping voltage, 1.9A peak pulse current, and 40W power rating. Both parts are ROHS3 compliant and in active production status. MMBZ15VAL,215 carries AEC-Q101 automotive qualification. MMBZ15VALT1G supports the extended operating temperature range of -55°C to 150°C (TJ).

For Applications Requiring Higher Transient Energy Absorption:

SM12.TCT (Semtech) and SM12T1G (onsemi) provide enhanced transient suppression capability with 12A peak pulse current and 300W power rating, compared to the original 1.9A and 40W. These parts operate at a lower clamping voltage of 19V. Both are ROHS3 compliant and in active production. SM12T1G supports the extended operating temperature range of -55°C to 150°C (TJ).

For General-Purpose Applications with Highest Power Dissipation:

ESDA14V2L (STMicroelectronics) offers 300W peak pulse power rating with the same 12V standoff voltage and SOT-23-3 package. This part is ROHS3 compliant and in active production. Operating temperature range is -40°C to 125°C (TJ).

All substitute parts are available in active production status, ensuring long-term supply continuity compared to the discontinued MMBZ15VAL-7.

Frequently Asked Questions (FAQ)

Q: Can MMBZ15VAL,215 or MMBZ15VALT1G be used as direct drop-in replacements for MMBZ15VAL-7?

A: Yes. Both parts maintain identical electrical specifications: 12V reverse standoff voltage, 14.25V minimum breakdown voltage, 21V clamping voltage, 1.9A peak pulse current, and 40W power rating. All three use SOT-23-3 surface mount packaging. The primary difference is product status—MMBZ15VAL,215 and MMBZ15VALT1G are in active production.

Q: What is the difference between SM12.TCT/SM12T1G and the original MMBZ15VAL-7?

A: SM12.TCT and SM12T1G maintain the 12V reverse standoff voltage and SOT-23-3 package but differ in transient performance. They provide 12A peak pulse current (versus 1.9A) and 300W power rating (versus 40W), with a lower clamping voltage of 19V (versus 21V). These parts are suitable for applications requiring higher transient energy absorption.

Q: Is ESDA14V2L compatible with the MMBZ15VAL-7 circuit?

A: ESDA14V2L shares the 12V reverse standoff voltage, SOT-23-3 package, and 300W power rating. However, clamping voltage and peak pulse current specifications are not provided for this part. Compatibility depends on circuit requirements for clamping voltage and transient current handling.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts (MMBZ15VAL,215, MMBZ15VALT1G, SM12.TCT, SM12T1G, ESDA14V2L) are ROHS3 compliant. The original MMBZ15VAL-7 is RoHS non-compliant.

Q: Which substitute part has the widest operating temperature range?

A: MMBZ15VALT1G and SM12T1G both support -55°C to 150°C (TJ) operating temperature range, matching the extended upper temperature limit of the original part. MMBZ15VAL,215 operates to 150°C but with -55°C minimum (TA specification). SM12.TCT and ESDA14V2L have more limited upper temperature ratings of 125°C.

Q: Can I use SM12.TCT or SM12T1G in place of MMBZ15VAL-7 without circuit modifications?

A: Circuit compatibility requires verification of clamping voltage tolerance. SM12.TCT and SM12T1G clamp at 19V versus the original 21V. If the circuit design requires the 21V clamping specification, these parts are not suitable without design review. If the circuit can tolerate 19V clamping, these parts provide superior transient suppression capability.