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onsemi MMBZ27VAWT1G
- Part No.:
- MMBZ27VAWT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMBZ27VAWT1G.pdf
- Description:
- TVS DIODE 22VWM 40VC SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,113
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Product details
Overview
MMBZ27VAWT1G from onsemi is a dual common-anode Zener diode array designed for bidirectional or unidirectional transient voltage suppression in signal line protection. It features a nominal Zener voltage of 27 V, 40 W peak pulse power (1 ms), <50 nA reverse leakage at 22 V, clamping voltage of 40 V at 1.0 A surge, and SC-70 (SOT-323) package. It is used in ESD protection for USB, HDMI, and Ethernet interfaces.
For engineers reviewing the MMBZ27VAWT1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage vs. working voltage margin, dual-line common-anode topology for space-constrained I/O protection, ESD robustness (Class 3B HBM >16 kV), thermal resistance (618 °C/W), and Pb-free SC-70 manufacturability.
Technical Context
The MMBZ27VAWT1G integrates two monolithic Zener junctions sharing a single anode terminal (Pin 3), enabling compact dual-rail protection without discrete pairing. Its breakdown voltage is tightly specified at 25.65–28.35 V (min/typ/max @ 1 mA), with temperature coefficient of +12.3 mV/°C - critical for stability across −55°C to +150°C operating range.
It supports both unidirectional (Pins 1–3 or 2–3) and bidirectional (Pins 1–2) configurations via internal topology. The 40 W peak pulse rating follows the Figure 5 rectangular waveform (1 ms, non-repetitive), and derating begins above 25°C per Figure 6 - requiring thermal-aware PCB layout on FR-5 substrates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V nominal, 25.65–28.35 V min/max @ 1 mA - defines precise clamping threshold for 24 V system rails |
| Peak Pulse Power | 40 W @ 1.0 ms - sustains high-energy ESD transients (e.g., IEC 61000-4-2 contact discharge) |
| Clamping Voltage (VC) | 40 V @ IPP = 1.0 A - ensures downstream ICs see <40 V during surge, preserving 3.3/5 V logic integrity |
| Working Peak Reverse Voltage | 22 V - sets maximum continuous DC bias before conduction, allowing 10% margin below 24 V nominal supply |
| ESD Rating (HBM) | Class 3B (>16 kV) - exceeds IEC 61000-4-2 Level 4 (8 kV contact / 15 kV air) for robust interface hardening |
| Junction Temp Range | −55°C to +150°C - supports automotive under-hood and industrial control environments |
| Thermal Resistance | 618 °C/W (Junction-to-Ambient) - dictates minimum copper area required for sustained 200 mW steady-state dissipation |
Pinout & Package
SC-70 (SOT-323) package: ultra-small surface-mount outline (2.2 × 1.35 × 0.95 mm), void-free thermosetting plastic case, UL 94 V-0 rated, optimized for high-density automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode 1 | First Zener cathode; connects to protected line 1 in unidirectional mode or forms one side of bidirectional path |
| Pin 2 | Cathode 2 | Second Zener cathode; connects to protected line 2 - enables dual-line common-anode topology |
| Pin 3 | Anode (Common) | Shared anode node; ties both Zeners to ground or reference rail - reduces component count by 50% vs. discrete pair |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode Zener topology | Enables simultaneous protection of two independent signal lines (e.g., D+ and D−) using one footprint - saves >1.5 mm² board area |
| 40 W peak pulse power | Handles 1 ms surges up to 1.0 A without degradation - meets IEC 61000-4-5 surge immunity requirements for industrial ports |
| Class 3B HBM ESD rating | Withstands >16 kV human-body discharges - eliminates need for external ESD diodes in consumer USB 2.0 designs |
| Pb-free SC-70 package | Complies with RoHS and J-STD-020 reflow profiles (260°C/10 s); compatible with standard SMT pick-and-place equipment |
| Low leakage (<50 nA @ 22 V) | Minimizes standby current draw in battery-powered IoT sensors - extends shelf life and operational runtime |
Applications
| USB 2.0 Data Lines | HDMI Hot-Plug Detection |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs against ESD events during cable insertion/removal in portable devices. IC Role / Device Role: Dual-rail transient voltage suppressor placed directly at connector, shunting surge current to ground via shared anode. Use Value: Prevents latch-up or gate oxide damage in USB transceivers by clamping transients to ≤40 V while maintaining signal integrity up to 480 Mbps. | Use Scenario: Safeguarding the 5 V hot-plug detect (HPD) line and TMDS clock/data channels in HDMI source/sink interfaces. IC Role / Device Role: Unidirectional Zener on HPD (Pin 1–3) and bidirectional configuration across TMDS pairs (Pins 1–2) for AC-coupled protection. Use Value: Ensures reliable plug detection and prevents false HPD toggling during electrostatic discharge, meeting HDMI 1.4a compliance requirements. |
| Industrial RS-485 Transceivers | Automotive Infotainment I/O |
Use Scenario: Shielding half-duplex RS-485 bus lines (A/B) from induced lightning surges and switching noise in factory automation networks. IC Role / Device Role: Common-anode Zener pair connected between A/GND and B/GND - provides symmetrical clamping with matched VZ tolerance. Use Value: Maintains common-mode rejection ratio (CMRR) during transients by ensuring <0.7 V mismatch between A/B clamping thresholds - avoids data corruption. | Use Scenario: Protecting CAN FD and LIN bus pins, as well as audio codec I²S lines, in vehicle infotainment head units exposed to load dump and ISO 10605 ESD. IC Role / Device Role: Dual Zener array deployed across multiple low-voltage I/O rails - leverages AEC-Q101 qualification of SZ variant for automotive-grade reliability. Use Value: Reduces BOM count by consolidating protection for 4+ signal paths into two SC-70 devices - lowers cost and improves first-pass yield in high-volume production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener-based transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ27VSWT1G | Single Zener (not dual), same VZ (27 V), identical SC-70 package but only one cathode/anode pair | Requires two devices for dual-line protection - increases footprint and solder joints vs. MMBZ27VAWT1G's integrated dual topology | Select when protecting isolated single lines or where bidirectional capability is unnecessary |
| SZMMBZ27VAWT1G | Automotive-grade variant: AEC-Q101 qualified, PPAP-capable, identical electrical specs and pinout | Required for automotive ECUs and infotainment systems needing certified reliability and traceable manufacturing controls | Select for automotive applications; otherwise MMBZ27VAWT1G suffices for commercial/industrial use |
Compared with MMBZ27VAWT1G, MMBZ27VSWT1G doubles component count for dual-line protection, while SZMMBZ27VAWT1G adds automotive qualification overhead without electrical benefit - choose based on application domain and BOM optimization goals.
Availability
MMBZ27VAWT1G is available at Aetrix Electronics and suitable for USB interface protection, HDMI hot-plug circuits, and industrial RS-485 transceiver designs requiring stable component supply and RoHS-compliant packaging.
Supply support for MMBZ27VAWT1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZxxVAWT1G series belongs to onsemi's transient voltage suppression portfolio, engineered specifically for high-density, low-leakage ESD and surge protection in space-constrained digital interfaces.
FAQ
What is the exact Zener breakdown voltage tolerance for MMBZ27VAWT1G?
The MMBZ27VAWT1G has a guaranteed breakdown voltage range of 25.65 V to 28.35 V at 1 mA test current (TA = 25°C), corresponding to ±5% tolerance around the nominal 27 V rating. This tight specification ensures predictable clamping behavior across production lots and temperature extremes, critical for protecting 24 V system rails without overdesigning margin.
How does the common-anode configuration of MMBZ27VAWT1G affect circuit implementation?
The common-anode configuration of MMBZ27VAWT1G requires Pin 3 to be tied to ground or a stable reference, while Pins 1 and 2 connect to separate protected lines. This topology enables true dual-rail unidirectional clamping - each cathode conducts independently during positive transients - eliminating cross-talk and simplifying routing compared to discrete dual-diode solutions.
Can MMBZ27VAWT1G be used for bidirectional transient suppression?
Yes, MMBZ27VAWT1G supports bidirectional operation by connecting the protected signal between Pins 1 and 2 - forming a back-to-back Zener pair with shared anode at Pin 3. In this mode, it clamps both polarities symmetrically, making it suitable for AC-coupled interfaces like HDMI TMDS or RS-485 differential pairs without additional components.
What is the maximum steady-state power dissipation for MMBZ27VAWT1G on a standard PCB?
MMBZ27VAWT1G has a total power dissipation limit of 200 mW at TA = 25°C on an FR-5 board, derating linearly at 1.6 mW/°C above that temperature. This value assumes minimal copper pour; actual thermal performance depends on PCB layout - adding thermal vias and 100 mm² copper area can improve heat spreading and sustain higher average power in continuous fault conditions.
Is MMBZ27VAWT1G suitable for automotive applications?
MMBZ27VAWT1G itself is not AEC-Q101 qualified; however, its automotive-grade counterpart SZMMBZ27VAWT1G shares identical electrical characteristics and pinout but includes full PPAP documentation and process controls. For automotive infotainment or body electronics, SZMMBZ27VAWT1G must be selected - MMBZ27VAWT1G is intended for commercial and industrial use only.
MMBZ27VAWT1G 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):
- 22V
- Voltage - Breakdown (Min):
- 25.65V
- Voltage - Clamping (Max) @ Ipp:
- 40V
- Current - Peak Pulse (10/1000µs):
- 1A
- 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)
MMBZ27VAWT1G FAQ
1.How can I place an order for MMBZ27VAWT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ27VAWT1G 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 MMBZ27VAWT1G reliable?
The price and inventory of MMBZ27VAWT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ27VAWT1G is usually 5 days.
3.What payment methods are accepted for MMBZ27VAWT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ27VAWT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ27VAWT1G?
MMBZ27VAWT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ27VAWT1G 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 MMBZ27VAWT1G?
For technical support, including MMBZ27VAWT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ27VAWT1G requirements.
6.How does Aetrix verify that MMBZ27VAWT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ27VAWT1G 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 MMBZ27VAWT1G meets industry standards.
7.What is the process for return or replacement of MMBZ27VAWT1G?
All MMBZ27VAWT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ27VAWT1G, 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 MMBZ27VAWT1G part is unused and in its original packaging.
Return procedure for MMBZ27VAWT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ27VAWT1G Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
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