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onsemi MMBZ15VALT3G
- Part No.:
- MMBZ15VALT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ15VALT3G.pdf
- Description:
- TVS DIODE 12VWM 21VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,606
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Product details
Overview
MMBZ15VALT3G from onsemi is a dual common-anode Zener diode array in SOT-23 package, designed for transient voltage suppression and ESD protection of two independent signal lines. It features 15 V nominal Zener breakdown voltage (±5%), 40 W peak pulse power at 1.0 ms, clamping voltage of 21 V at 1.9 A peak pulse current, and IEC 61000-4-2 Level 4 ±30 kV contact discharge rating. It is used in USB, HDMI, and Ethernet port protection circuits where board space is constrained.
For engineers reviewing the MMBZ15VALT3G datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional/unidirectional configuration flexibility, low leakage (<50 nA @ 12 V), thermal resistance (417 °C/W on alumina), UL 94 V-0 flammability rating, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device integrates two monolithic Zener junctions sharing a common anode (Pin 3), enabling either dual unidirectional protection (Pins 1–3 and 2–3) or single bidirectional protection (Pins 1–2). Its 40 W peak power rating applies to non-repetitive 1.0 ms pulses per Figure 6 waveform, with derating above 25 °C per Figure 7.
The MMBZ15VALT3G operates across −55 °C to +150 °C junction temperature range, exhibits a positive temperature coefficient of 7.5 mV/°C for VBR, and maintains <0.9 V forward voltage at 10 mA - critical for low-loss clamping in high-speed data line protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VBR) | 14.25–15.75 V @ 1 mA test current - ensures precise clamping threshold for 15 V rail protection |
| Clamping Voltage (VC) | 21 V @ 1.9 A peak pulse current - defines maximum voltage seen by protected IC during ESD event |
| Peak Pulse Power (Ppk) | 40 W @ 1.0 ms - supports robust transient immunity per IEC 61000-4-2 and ISO 10605 |
| ESD Rating | ±30 kV contact discharge (IEC 61000-4-2 Level 4) - exceeds industrial and automotive ESD requirements |
| Reverse Leakage (IR) | <50 nA @ 12 V working voltage - minimizes standby power loss and signal distortion |
| Thermal Resistance (RJA) | 417 °C/W on alumina substrate - enables stable operation under sustained surge conditions |
| Package | SOT-23 (Case 318, Style 12) - surface-mount, 2.9 × 1.3 × 1.0 mm footprint for high-density PCB layout |
Pinout & Package
SOT-23 package (Case 318, Style 12) with void-free thermosetting plastic case, UL 94 V-0 rated, and Pb-free/RoHS-compliant construction. Designed for automated placement and reflow soldering at 260 °C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode 1 | First Zener junction cathode - connects to Line 1 for unidirectional protection or forms one side of bidirectional path |
| Pin 2 | Cathode 2 | Second Zener junction cathode - connects to Line 2; enables dual-line protection without extra components |
| Pin 3 | Anode (Common) | Shared anode node - ties both Zeners to ground or reference plane; defines common return path |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Reduces component count by 50% vs. discrete Zeners - saves PCB area and assembly cost in multi-line interfaces |
| Configurable unidirectional/bidirectional mode | Supports flexible routing: Pins 1–3 + 2–3 for two independent lines, or Pins 1–2 for differential/symmetrical clamping |
| IEC 61000-4-2 Level 4 compliance | Guarantees survivability against ±30 kV contact discharge - eliminates need for external ESD filters in certified designs |
| Low thermal resistance (417 °C/W) | Enables reliable operation on alumina substrates in automotive control units and industrial PLCs with limited airflow |
| AEC-Q101 qualification | Validated for automotive applications including infotainment and ADAS sensor interfaces requiring extended temperature and life testing |
Applications
| USB 2.0 Port Protection | HDMI Interface Clamping |
|---|---|
|
Use Scenario: Protecting D+ and D− lines of a USB 2.0 host controller from ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Dual Zener clamp limiting transient overvoltage to ≤21 V while preserving signal integrity up to 480 Mbps. Use Value: Prevents latch-up or damage to USB transceivers without adding series impedance or degrading rise/fall times. |
Use Scenario: Safeguarding TMDS clock and data channels in HDMI 1.4 receivers against contact ESD in consumer AV equipment. IC Role / Device Role / Timing Role: Bidirectional clamping (Pins 1–2) suppresses ±30 kV surges while maintaining <0.5 pF capacitance per line at 0 V bias. Use Value: Avoids video artifacts or link drops during ESD exposure - meets HDMI compliance test requirements. |
| Automotive CAN FD Transceiver Protection | Industrial RS-485 Node Shielding |
|
Use Scenario: Protecting CAN_H and CAN_L pins of a CAN FD transceiver in body control modules exposed to load dump and ESD. IC Role / Device Role / Timing Role: Unidirectional configuration (Pins 1–3 and 2–3) clamps each line to ground independently with 15 V threshold. Use Value: Maintains CAN FD bit rate (up to 5 Mbps) by minimizing parasitic capacitance (≤30 pF @ 0 V) and avoiding false dominant states. |
Use Scenario: Shielding RS-485 driver/receiver pairs in factory automation gateways connected to long cable runs. IC Role / Device Role / Timing Role: Dual-line unidirectional clamping referenced to local ground, handling repetitive surges up to 40 W peak power. Use Value: Extends system uptime by preventing transceiver failure due to induced lightning surges or switching transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener transient protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ15VALT1G | Same electrical specs but supplied in 3,000-unit tape-and-reel (vs. 10,000-unit MMBZ15VALT3G); identical SOT-23 package and marking | Preferred for prototyping or low-volume production where smaller reels reduce inventory holding cost | Select MMBZ15VALT1G when order quantity is below 5,000 units or for evaluation boards requiring minimal reel usage |
| SZMMBZ15VALT3G | Automotive-grade variant with AEC-Q101 certification, PPAP documentation, and controlled manufacturing site traceability | Required for Tier 1 automotive systems where process validation and lot-level traceability are mandated | Choose SZMMBZ15VALT3G only when automotive qualification and full PPAP support are contractually required |
Compared with MMBZ15VALT1G, the MMBZ15VALT3G offers higher volume efficiency and lower unit cost per reel; compared with SZMMBZ15VALT3G, it provides identical electrical performance at lower cost and without automotive documentation overhead - ideal for industrial and commercial applications.
Availability
MMBZ15VALT3G is available at Aetrix Electronics and suitable for USB interface protection, HDMI clamping, automotive CAN FD shielding, and industrial RS-485 node hardening requiring stable component supply and long-term manufacturability.
Supply support for MMBZ15VALT3G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZxxxALT1G series is engineered specifically for compact, high-reliability transient voltage suppression in space-constrained digital interfaces - balancing ESD robustness, low capacitance, and thermal resilience.
FAQ
What is the Zener breakdown voltage tolerance for MMBZ15VALT3G?
The MMBZ15VALT3G has a nominal Zener breakdown voltage of 15 V with a tolerance of ±5%, specified as 14.25 V minimum to 15.75 V maximum at 1 mA test current. This tight tolerance ensures consistent clamping behavior across production lots and supports reliable design margining in 15 V rail protection schemes.
Can MMBZ15VALT3G be used in bidirectional ESD protection mode?
Yes, MMBZ15VALT3G supports bidirectional operation by connecting the protected differential pair between Pin 1 (Cathode 1) and Pin 2 (Cathode 2), with Pin 3 (Common Anode) grounded. This configuration leverages both Zener junctions to clamp positive and negative transients symmetrically - commonly applied in HDMI, LVDS, and USB differential signaling.
What is the maximum clamping voltage of MMBZ15VALT3G under surge conditions?
The MMBZ15VALT3G exhibits a maximum clamping voltage (VC) of 21 V at 1.9 A peak pulse current (IPP), measured per the 1.0 ms rectangular waveform in Figure 6 of the datasheet. This value defines the upper voltage limit imposed on protected circuitry during standardized ESD or surge events.
Is MMBZ15VALT3G qualified for automotive applications?
The standard MMBZ15VALT3G is not AEC-Q101 qualified; however, its automotive-grade counterpart SZMMBZ15VALT3G is fully AEC-Q101 qualified, PPAP-capable, and manufactured under automotive-specific process controls. For non-automotive industrial or commercial use, MMBZ15VALT3G delivers identical electrical performance with simplified logistics.
How does the thermal performance of MMBZ15VALT3G compare between FR-5 and alumina substrates?
On FR-5 board, MMBZ15VALT3G has RJA = 556 °C/W and 225 mW steady-state power dissipation; on alumina substrate, RJA improves to 417 °C/W with 300 mW dissipation capability. This 25% thermal improvement makes alumina mounting essential for sustained surge duty cycles in automotive or industrial environments.
MMBZ15VALT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 14.25V
- Voltage - Clamping (Max) @ Ipp:
- 21V
- Current - Peak Pulse (10/1000µs):
- 1.9A
- 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:
- SOT-23-3 (TO-236)
MMBZ15VALT3G FAQ
1.How can I place an order for MMBZ15VALT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ15VALT3G 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 MMBZ15VALT3G reliable?
The price and inventory of MMBZ15VALT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ15VALT3G is usually 5 days.
3.What payment methods are accepted for MMBZ15VALT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ15VALT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ15VALT3G?
MMBZ15VALT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ15VALT3G 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 MMBZ15VALT3G?
For technical support, including MMBZ15VALT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ15VALT3G requirements.
6.How does Aetrix verify that MMBZ15VALT3G is sourced from the original manufacturer or authorized distributors?
All MMBZ15VALT3G 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 MMBZ15VALT3G meets industry standards.
7.What is the process for return or replacement of MMBZ15VALT3G?
All MMBZ15VALT3G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ15VALT3G, 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 MMBZ15VALT3G part is unused and in its original packaging.
Return procedure for MMBZ15VALT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ15VALT3G 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
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
-
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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