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onsemi MMBZ27VCLT1G
- Part No.:
- MMBZ27VCLT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ27VCLT1G.pdf
- Description:
- TVS DIODE 22VWM 38VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:43,524
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Product details
Overview
MMBZ27VCLT1G from onsemi is a dual common-cathode 27 V Zener diode array in SOT-23 package, rated for 40 W peak pulse power (1.0 ms), 22.5 mW steady-state dissipation on FR-5 board, and ±30 kV IEC61000-4-2 contact ESD protection. It provides bidirectional clamping for two signal lines in space-constrained interfaces such as automotive CAN bus transceivers and USB data lines.
For engineers reviewing the MMBZ27VCLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include verified 27 V nominal breakdown voltage (25.65–28.35 V at 1 mA), <50 nA reverse leakage at 22 V, 38 V clamping voltage at 1.0 A peak pulse, and SOT-23 dual-anode/common-cathode terminal configuration.
Technical Context
This device integrates two monolithic silicon Zener junctions sharing a common cathode (Pin 3), enabling either independent unidirectional protection of two lines or combined bidirectional transient suppression. Its thermal resistance is 556 °C/W on FR-5 board and 417 °C/W on alumina substrate.
The MMBZ27VCLT1G operates across −55 °C to +150 °C junction temperature range, supports 260 °C soldering for 10 seconds, and meets UL 94 V-0 flammability rating. It is Pb-free and AEC-Q101 qualified when ordered with SZ prefix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 25.65–28.35 V @ 1.0 mA - ensures precise 27 V regulation tolerance for ESD clamp threshold setting |
| Clamping Voltage (VC) | 38 V @ 1.0 A peak pulse - limits transient overvoltage to safe level during 40 W surge events |
| Peak Pulse Power | 40 W @ 1.0 ms - sustains high-energy ESD/EMI transients per IEC61000-4-2 Level 4 |
| Reverse Leakage (IR) | <50 nA @ 22 V - minimizes standby current draw in always-on signal paths |
| ESD Rating | ±30 kV contact discharge (IEC61000-4-2 Level 4) - exceeds automotive and industrial immunity requirements |
| Package | SOT-23 (Case 318, Style 9) - enables 2.9 × 1.3 mm PCB footprint for dual-line protection in tight layouts |
Pinout & Package
SOT-23 package (Case 318, Style 9) with void-free thermosetting plastic case, corrosion-resistant finish, and UL 94 V-0 flammability rating. Maximum solder temperature: 260 °C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | First protected line input - connects to signal path requiring unidirectional clamping to ground |
| Pin 2 | Anode 2 | Second protected line input - enables independent or shared bidirectional clamping with Pin 1 |
| Pin 3 | Cathode (common) | Shared reference node - ties both Zeners to system ground or bias rail for dual-line protection |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-cathode topology | Reduces component count by 50% vs. discrete Zeners - one SOT-23 replaces two SOD-123 devices |
| Bidirectional configuration capability | Supports single-package transient suppression across differential pairs without external wiring changes |
| Class 3B HBM ESD rating | Withstands >16 kV human-body-model discharge - eliminates need for supplemental ESD components |
| Pb-free and RoHS-compliant | Meets global environmental compliance mandates without derating or qualification retest overhead |
| AEC-Q101 qualification path | SZ-prefix variants support automotive applications with full PPAP documentation and traceable lot control |
Applications
| Automotive Single-Wire CAN Bus | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Transient suppression on SW-CAN bus lines exposed to load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Dual-line ESD clamp protecting transceiver I/O pins against ±30 kV contact discharge per ISO 10605. Use Value: Enables compact placement at connector interface with 38 V clamping voltage limiting bus overvoltage to non-destructive levels. |
Use Scenario: ESD protection for D+ and D− lines in portable USB peripherals operating near human touch points. IC Role / Device Role / Timing Role: Common-cathode Zener pair providing symmetrical clamping to ground for bidirectional data signals. Use Value: Maintains signal integrity with <50 nA leakage at 22 V working voltage while surviving repeated 16 kV HBM strikes. |
| Industrial RS-485 Interface | Medical Sensor Signal Conditioning |
Use Scenario: Surge protection for half-duplex RS-485 transceivers in factory automation systems subject to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between A/B lines and ground to shunt 40 W pulses. Use Value: Delivers 40 W peak pulse handling in 2.9 × 1.3 mm footprint - avoids board area penalty of discrete TVS arrays. |
Use Scenario: Low-leakage overvoltage protection for analog front-end inputs of patient-connected biosensors. IC Role / Device Role / Timing Role: Precision 27 V Zener clamp preventing ADC saturation during electrostatic discharge events. Use Value: Guarantees <50 nA reverse leakage at 22 V - preserves nanoamp-level sensor bias currents and measurement accuracy. |
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 |
|---|---|---|---|
| MMBZ27VCALT1G | Same 27 V breakdown, but uses alternate marking code "27CA" and may reflect minor process revision - identical electrical specs and SOT-23 pinout | No functional difference; used interchangeably in legacy designs where marking consistency is not required | Select when sourcing flexibility is needed across onsemi's dual-Zener family without changing layout or firmware |
| SZMMBZ27VCLT1G | AEC-Q101 qualified variant with automotive-grade traceability, same 27 V VBR, 38 V VC, and SOT-23 package | Required for automotive production programs needing PPAP documentation and extended temperature validation | Choose for Tier 1 automotive designs where qualification compliance outweighs cost premium |
Compared with MMBZ27VCLT1G, MMBZ27VCALT1G offers identical protection performance with alternate marking, while SZMMBZ27VCLT1G adds automotive qualification and supply-chain traceability - neither requires PCB changes, but only the SZ variant satisfies OEM AEC-Q101 mandates.
Availability
MMBZ27VCLT1G is available at Aetrix Electronics and suitable for automotive CAN bus interfaces, USB 2.0 peripheral protection, and industrial RS-485 communication systems requiring stable component supply and guaranteed long-term availability.
Supply support for MMBZ27VCLT1G 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, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MMBZxxVxL series was designed specifically for compact, high-reliability ESD and surge protection in space-constrained signal interfaces - emphasizing low leakage, precise Zener voltage, and robust IEC61000-4-2 compliance.
FAQ
What is the exact Zener breakdown voltage range for MMBZ27VCLT1G?
The MMBZ27VCLT1G has a specified breakdown voltage range of 25.65 V to 28.35 V at 1.0 mA test current, with a nominal value of 27 V. This tolerance ensures reliable clamping behavior across manufacturing lots and temperature variations from −55 °C to +150 °C, as confirmed in the onsemi datasheet revision 18, page 3.
Does MMBZ27VCLT1G support bidirectional transient suppression?
Yes, the MMBZ27VCLT1G supports bidirectional operation by connecting Pins 1 and 2 to opposing sides of a differential signal pair and Pin 3 to ground - forming a symmetric clamp. Its dual-anode/common-cathode structure enables this configuration without external components, as validated in Figure 7 of the official datasheet for Single-Wire CAN applications.
What is the maximum clamping voltage of MMBZ27VCLT1G under surge conditions?
The MMBZ27VCLT1G exhibits a maximum clamping voltage (VC) of 38 V at 1.0 A peak pulse current, measured using the 1.0 ms waveform defined in Figure 5 of the datasheet. This value remains stable across ambient temperatures up to +125 °C, making it suitable for high-reliability industrial and automotive environments.
Is MMBZ27VCLT1G RoHS-compliant and lead-free?
Yes, MMBZ27VCLT1G is explicitly marked as Pb-Free in the onsemi datasheet (page 1, "Pb-Free Package" note) and conforms to RoHS Directive 2011/65/EU. The device uses a corrosion-resistant, easily solderable finish and is rated for 260 °C reflow for 10 seconds - fully compatible with modern lead-free assembly processes.
Can MMBZ27VCLT1G replace discrete Zener diodes in existing designs?
Yes, MMBZ27VCLT1G can directly replace two discrete 27 V Zeners (e.g., MMBZ27VLT1G ×2) in common-cathode configurations, reducing component count and PCB area by 50%. Its SOT-23 pinout (Anode-Anode-Cathode) matches standard layout footprints for dual-Zener protection, with no change to schematic or routing required.
MMBZ27VCLT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- 38V
- 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:
- SOT-23-3 (TO-236)
MMBZ27VCLT1G FAQ
1.How can I place an order for MMBZ27VCLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ27VCLT1G 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 MMBZ27VCLT1G reliable?
The price and inventory of MMBZ27VCLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ27VCLT1G is usually 5 days.
3.What payment methods are accepted for MMBZ27VCLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ27VCLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ27VCLT1G?
MMBZ27VCLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ27VCLT1G 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 MMBZ27VCLT1G?
For technical support, including MMBZ27VCLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ27VCLT1G requirements.
6.How does Aetrix verify that MMBZ27VCLT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ27VCLT1G 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 MMBZ27VCLT1G meets industry standards.
7.What is the process for return or replacement of MMBZ27VCLT1G?
All MMBZ27VCLT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ27VCLT1G, 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 MMBZ27VCLT1G part is unused and in its original packaging.
Return procedure for MMBZ27VCLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ27VCLT1G 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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