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onsemi MMBZ20VAWT1G
- Part No.:
- MMBZ20VAWT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMBZ20VAWT1G.pdf
- Description:
- TVS DIODE 17VWM 28VC SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,549
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Product details
Overview
MMBZ20VAWT1G from onsemi is a dual common-anode Zener diode array designed for bidirectional or unidirectional transient voltage suppression in space-constrained ESD protection circuits. It features a 20 V nominal Zener breakdown voltage (19.0–21.0 V at 1 mA), 40 W peak pulse power (1 ms), <50 nA reverse leakage at 17 V, and SC-70 (SOT-323) package. It is used to protect two signal lines-such as USB D+/D− or I²C SDA/SCL-in consumer electronics and industrial interfaces.
For engineers reviewing the MMBZ20VAWT1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage (28 V @ 1.4 A), working peak reverse voltage (17 V), bidirectional configuration capability, UL 94 V-0 flammability rating, and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
The MMBZ20VAWT1G integrates two monolithic Zener junctions sharing a single anode terminal (Pin 3), enabling compact dual-line protection without discrete device duplication. Its SC-70 package supports both unidirectional (Pins 1–3 or 2–3) and bidirectional (Pins 1–2) configurations, with thermal resistance of 618°C/W and junction temperature range from −55°C to +150°C.
It delivers 28 V clamping voltage at 1.4 A peak pulse current per IEC 61000-4-2 Level 4 ESD events, with <5.0 µA leakage at VRWM and ±0.012%/°C temperature coefficient of VBR. The device meets Class 3B (>16 kV HBM) and Class C (>400 V MM) ESD ratings and is Pb-free, RoHS-compliant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VBR) | 19.0–21.0 V @ 1 mA - defines precise clamping threshold for 20 V rail protection |
| Working Peak Reverse Voltage (VRWM) | 17 V - maximum continuous reverse voltage before significant leakage begins |
| Clamping Voltage (VC) | 28 V @ IPP = 1.4 A - limits transient voltage seen by downstream ICs during surge events |
| Peak Pulse Power (Ppk) | 40 W @ 1.0 ms - sustains high-energy transients without failure under defined waveform |
| ESD Rating (HBM) | Class 3B (>16 kV) - exceeds IEC 61000-4-2 Level 4 for robust system-level ESD immunity |
| Leakage Current (IR) | <50 nA @ 17 V - ensures minimal standby power loss and signal integrity in high-impedance nodes |
| Package | SC-70 (SOT-323) - 2.2 × 1.35 × 0.95 mm footprint enables high-density PCB layout |
Pinout & Package
SC-70 (SOT-323) package with molded thermosetting plastic case, UL 94 V-0 rated, and optimized for automated placement. Pin 1: Cathode 1; Pin 2: Cathode 2; Pin 3: Common Anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode 1 | Connects to first protected line (e.g., USB D+); reverse-biased during overvoltage |
| Pin 2 | Cathode 2 | Connects to second protected line (e.g., USB D−); enables dual-line protection in one footprint |
| Pin 3 | Common Anode | Shared reference node tied to ground or supply rail; defines common return path for both Zeners |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Reduces board area by 50% vs. two discrete Zeners while maintaining independent line protection |
| Bidirectional configuration support | Enables symmetric ±20 V clamping across Pins 1–2 without external components |
| 40 W peak pulse power rating | Withstands IEC 61000-4-5 surge waveforms up to 1.2/50 μs without degradation |
| AEC-Q101 qualified variant (SZ prefix) | Validated for automotive infotainment and body control modules requiring extended temperature and reliability validation |
| Pb-free and RoHS-compliant | Meets global environmental compliance requirements without compromising solderability or thermal performance |
Applications
| USB 2.0 Interface Protection | I²C Bus Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of a USB 2.0 port against ESD events during hot-plug insertion. IC Role / Device Role: Dual-line transient voltage suppressor placed between connector and USB transceiver IC. Use Value: Clamps transients to ≤28 V within nanoseconds, preserving signal integrity and preventing PHY latch-up. | Use Scenario: Shielding SDA and SCL lines in microcontroller-based sensor networks from board-level ESD coupling. IC Role / Device Role: Low-capacitance Zener array placed at bus entry point to limit voltage excursions. Use Value: Maintains <0.5 pF typical capacitance per line (per datasheet Fig. 3), avoiding signal rise-time degradation. |
| Industrial HMI Touch Panel | Automotive Infotainment Display Port |
Use Scenario: Guarding resistive touch overlay signal lines (X+, X−, Y+, Y−) against user-induced ESD in factory-floor HMIs. IC Role / Device Role: Dual Zener pair per differential pair, leveraging common-anode grounding for shared return path. Use Value: Enables 4-line protection with only two MMBZ20VAWT1G devices, reducing BOM count and layout complexity. | Use Scenario: Protecting LVDS or FPD-Link II display data lanes in automotive head units exposed to cabin ESD. IC Role / Device Role: AEC-Q101-qualified SZMMBZ20VAWT1G variant used on display interface flex cables. Use Value: Guarantees operation from −40°C to +125°C ambient and passes automotive-grade ESD stress testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMC2020LSD-7 | Single-channel, 20 V Zener, SOD-323 package; no dual-cathode topology | Requires two devices for dual-line protection; larger total footprint than one MMBZ20VAWT1G | Select when discrete layout flexibility is preferred over space optimization |
| SZMMBZ20VAWT1G | Identical electrical specs; AEC-Q101 qualified and PPAP capable; same SC-70 package | Designed for automotive environments with extended temperature validation and traceable manufacturing controls | Select for automotive OEM programs requiring certified component sourcing and change control |
Compared with DMC2020LSD-7, MMBZ20VAWT1G reduces component count and PCB area by integrating two Zeners; compared with SZMMBZ20VAWT1G, it lacks automotive qualification but offers identical performance for commercial-grade designs where cost and lead time are prioritized.
Availability
MMBZ20VAWT1G is available at Aetrix Electronics and suitable for USB interface protection, I²C bus hardening, and industrial HMI ESD mitigation requiring stable component supply and consistent parametric performance across production lots.
Supply support for MMBZ20VAWT1G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MMBZ20VAWT1G belongs to the MMBZxxVAWT1G series of dual Zener TVS diodes engineered specifically for high-density, low-leakage ESD protection in portable and space-constrained electronics.
FAQ
What is the clamping voltage of MMBZ20VAWT1G and how is it measured?
The MMBZ20VAWT1G has a clamping voltage (VC) of 28 V measured at a peak pulse current (IPP) of 1.4 A using the 1.0 ms rectangular waveform per Figure 5 in the datasheet. This value represents the maximum voltage imposed on protected lines during standardized surge events, ensuring downstream ICs remain within safe operating limits. The clamping behavior is verified under unidirectional test conditions across Pins 1–3 or 2–3.
Can MMBZ20VAWT1G be used in bidirectional ESD protection mode?
Yes, MMBZ20VAWT1G supports bidirectional operation when connected across Pins 1 and 2 (both cathodes), with Pin 3 grounded. In this configuration, it provides symmetrical ±20 V breakdown and clamps transients on either polarity. The datasheet confirms bidirectional mode performance in Figures 1 and 3, showing matched VBR curves and capacitance behavior for both polarities.
What is the maximum reverse leakage current for MMBZ20VAWT1G at its working voltage?
The MMBZ20VAWT1G exhibits a maximum reverse leakage current (IR) of 50 nA at its working peak reverse voltage (VRWM) of 17 V, measured at TA = 25°C. This ultra-low leakage preserves signal integrity in high-impedance analog and digital interfaces, such as I²C buses or sensor inputs, where even nanoamp-level currents could affect accuracy or logic thresholds.
Is MMBZ20VAWT1G suitable for automotive applications?
The standard MMBZ20VAWT1G is not AEC-Q101 qualified; however, its automotive-grade counterpart SZMMBZ20VAWT1G shares identical electrical parameters and SC-70 packaging while adding PPAP capability and extended reliability validation. For non-safety-critical automotive infotainment or body electronics, the SZ variant is required-MMBZ20VAWT1G itself is intended for commercial and industrial use.
What is the thermal resistance and power derating behavior of MMBZ20VAWT1G?
MMBZ20VAWT1G has a junction-to-ambient thermal resistance (RJA) of 618°C/W on FR-5 board. Its steady-state power dissipation is rated at 200 mW at 25°C, derating linearly by 1.6 mW/°C above that temperature (per Figure 4). This derating curve ensures safe operation up to +150°C junction temperature, critical for enclosed or thermally stressed environments.
MMBZ20VAWT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 28V
- Current - Peak Pulse (10/1000µs):
- 1.4A
- Power - Peak Pulse:
- 40W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3 (SOT323)
MMBZ20VAWT1G FAQ
1.How can I place an order for MMBZ20VAWT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ20VAWT1G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MMBZ20VAWT1G reliable?
The price and inventory of MMBZ20VAWT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ20VAWT1G is usually 5 days.
3.What payment methods are accepted for MMBZ20VAWT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ20VAWT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ20VAWT1G?
MMBZ20VAWT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ20VAWT1G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MMBZ20VAWT1G?
For technical support, including MMBZ20VAWT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ20VAWT1G requirements.
6.How does Aetrix verify that MMBZ20VAWT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ20VAWT1G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MMBZ20VAWT1G meets industry standards.
7.What is the process for return or replacement of MMBZ20VAWT1G?
All MMBZ20VAWT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ20VAWT1G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MMBZ20VAWT1G part is unused and in its original packaging.
Return procedure for MMBZ20VAWT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ20VAWT1G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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