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MMBZ27VAL,235 Equivalent & Substitute Parts
Part Overview
The MMBZ27VAL,235 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Nexperia USA Inc. in SOT-23-3 (TO-236AB) surface mount package. This component provides 22V reverse standoff voltage with 40V maximum clamping voltage at 1A peak pulse current, designed for transient overvoltage protection in electronic circuits. The part is active in production status with AEC-Q101 automotive qualification and ROHS3 compliance. Equivalent and substitute parts are identified based on matching electrical performance parameters and package compatibility within the TVS diode category.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 22V | V |
| Voltage - Breakdown (Min) | 25.65V | V |
| Voltage - Clamping (Max) @ Ipp | 40V | V |
| Current - Peak Pulse (10/1000µs) | 1A | A |
| Power - Peak Pulse | 40W | W |
| Operating Temperature Range | -55°C to 150°C | °C |
| Package / Case | TO-236-3, SC-59, SOT-23-3 | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the MMBZ27VAL,235 are classified into two categories based on electrical parameter alignment:
Direct Electrical Equivalents: Parts with identical or near-identical voltage ratings (22V reverse standoff, 25.65V breakdown minimum, 40V clamping maximum) and current handling (1A peak pulse). These parts maintain the same functional performance envelope and are interchangeable in circuit applications requiring 22V protection.
Similar Voltage Class Parts: Parts within adjacent voltage rating classes (5V, 12V, 15V, 24V, 36V) that share the same SOT-23-3 package footprint and surface mount technology. These parts are suitable for applications with different voltage protection requirements but identical mechanical and thermal characteristics.
Key Parameters for Substitution Determination:
- Voltage - Reverse Standoff (Typ)
- Voltage - Clamping (Max) @ Ipp
- Current - Peak Pulse (10/1000µs)
- Package / Case (SOT-23-3 compatibility)
- Operating Temperature Range
- RoHS and AEC-Q101 compliance status
Parameter Comparison
| Part Number | Manufacturer | Reverse Standoff (V) | Breakdown Min (V) | Clamping Max (V) | Peak Pulse (A) | Power Peak (W) | Temp Range (°C) | Package | RoHS | AEC-Q101 |
|---|---|---|---|---|---|---|---|---|---|---|
| MMBZ27VAL,235 | Nexperia USA Inc. | 22 | 25.65 | 40 | 1 | 40 | -55 to 150 | SOT-23-3 | Yes | Yes |
| MMBZ27VALT1G | onsemi | 22 | 25.65 | 40 | 1 | 40 | -55 to 150 | SOT-23-3 | Yes | No |
| SZMMBZ27VALT1G | onsemi | 22 | 25.65 | 40 | 1 | 40 | -55 to 150 | SOT-23-3 | Yes | Yes |
| SM05.TCT | UMW | 5 | 6 | 15 | 10 | 150 | -55 to 125 | SOT-23-3 | Yes | No |
| SM05/TR7 | Microsemi Corporation | 5 | 6 | 9.8 | 5 | 300 | -55 to 150 | SOT-23-3 | No | No |
| SM12.TCT | Semtech | 12 | 13.3 | 19 | 12 | 300 | -55 to 125 | SOT-23-3 | Yes | No |
| SM15.TCT | Semtech Corporation | 15 | 16.7 | 24 | 10 | 300 | -55 to 125 | SOT-23-3 | Yes | No |
| SM24.TCT | Semtech Corporation | 24 | 26.7 | 43 | 5 | 300 | -55 to 125 | SOT-23-3 | Yes | No |
| SM36-TP | Micro Commercial Co | 36 | 40 | 80 | 3 | 240 | -55 to 125 | SOT-23-3 | Yes | No |
| SM36.TCT | Semtech Corporation | 36 | 40 | 60 | 4 | 300 | -55 to 125 | SOT-23-3 | Yes | No |
Engineering Selection Recommendations
Direct Replacement (Identical Electrical Performance):
SZMMBZ27VALT1G (onsemi) is the primary direct equivalent. This part maintains identical voltage ratings (22V reverse standoff, 40V clamping), current handling (1A peak pulse), and operating temperature range (-55°C to 150°C). Both the main part and SZMMBZ27VALT1G carry AEC-Q101 automotive qualification and ROHS3 compliance, making this substitution suitable for automotive and industrial applications requiring certified components.
MMBZ27VALT1G (onsemi) provides identical electrical performance but lacks AEC-Q101 qualification. This part is suitable for general-purpose applications where automotive certification is not required.
Voltage Class Alternatives (Different Protection Levels):
Selection of alternative voltage classes depends on the target protection voltage requirement:
- SM05.TCT / SM05/TR7: 5V protection class
- SM12.TCT: 12V protection class
- SM15.TCT: 15V protection class
- SM24.TCT: 24V protection class
- SM36-TP / SM36.TCT: 36V protection class
All substitute parts share SOT-23-3 package compatibility and surface mount technology. Parts with ROHS3 compliance (SM12.TCT, SM15.TCT, SM24.TCT, SM36-TP, SM36.TCT, SM05.TCT) are preferred for applications with environmental compliance requirements. Operating temperature range varies between -55°C to 125°C (most Semtech and UMW parts) and -55°C to 150°C (Nexperia and Microsemi parts); verify thermal requirements for your application.
Frequently Asked Questions (FAQ)
Q: Can MMBZ27VALT1G replace MMBZ27VAL,235 in automotive applications?
A: MMBZ27VALT1G provides identical electrical performance but lacks AEC-Q101 automotive qualification. For automotive applications requiring certified components, use SZMMBZ27VALT1G instead, which maintains both electrical equivalence and AEC-Q101 qualification.
Q: What is the difference between MMBZ27VALT1G and SZMMBZ27VALT1G?
A: Both parts are manufactured by onsemi with identical electrical specifications (22V reverse standoff, 40V clamping, 1A peak pulse). The primary difference is AEC-Q101 automotive qualification, which SZMMBZ27VALT1G carries and MMBZ27VALT1G does not. Select SZMMBZ27VALT1G for automotive or safety-critical applications.
Q: Can I use SM24.TCT or SM36.TCT as substitutes for the MMBZ27VAL,235?
A: SM24.TCT and SM36.TCT share the same SOT-23-3 package footprint but provide different voltage protection levels (24V and 36V respectively, compared to 22V for MMBZ27VAL,235). These parts are suitable only if your circuit requires higher voltage protection. Verify that your application can tolerate the higher clamping voltages before substitution.
Q: Are all substitute parts ROHS3 compliant?
A: No. SM05/TR7 (Microsemi) is RoHS non-compliant. All other listed substitutes (MMBZ27VALT1G, SZMMBZ27VALT1G, SM05.TCT, SM12.TCT, SM15.TCT, SM24.TCT, SM36-TP, SM36.TCT) are ROHS3 compliant. Verify RoHS compliance requirements for your application before selection.
Q: What is the operating temperature difference between substitute parts?
A: MMBZ27VAL,235, MMBZ27VALT1G, SZMMBZ27VALT1G, and SM05/TR7 operate across -55°C to 150°C. Most Semtech parts (SM12.TCT, SM15.TCT, SM24.TCT, SM36.TCT) and UMW SM05.TCT operate across -55°C to 125°C. Verify your application's thermal requirements; if operation above 125°C is required, select parts with -55°C to 150°C range.
Q: Can I interchange parts with different peak pulse current ratings?
A: No. Peak pulse current rating determines the maximum transient energy the diode can safely dissipate. MMBZ27VAL,235 is rated for 1A peak pulse. Substitutes with higher ratings (SM05.TCT at 10A, SM12.TCT at 12A) can handle larger transients but are not interchangeable in circuits designed for 1A protection. Lower-rated parts cannot be used as substitutes.
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