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onsemi SZMMBZ27VCLT3G
- Part No.:
- SZMMBZ27VCLT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ27VCLT3G.pdf
- Description:
- TVS DIODE 22VWM 38VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:47,419
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Product details
Overview
SZMMBZ27VCLT3G from onsemi is a dual common-cathode 27 V Zener diode array in SOT-23 package, rated for 40 W peak pulse power (1 ms), 225 mW steady-state dissipation on FR-5 board, and ±30 kV IEC61000-4-2 contact ESD protection. It serves as bidirectional transient voltage suppressor in automotive CAN bus interfaces and industrial I/O lines.
For engineers reviewing the SZMMBZ27VCLT3G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage at 1.0 A (38 V), working reverse voltage (22 V), leakage current (<50 nA @ 22 V), and AEC-Q101 qualification for automotive use.
Technical Context
This device integrates two monolithic Zener junctions sharing a common cathode (Pin 3), enabling either dual unidirectional protection (Pins 1–3 and 2–3) or single bidirectional configuration (Pins 1–2). Its thermal resistance is 556 °C/W on FR-5 board and 417 °C/W on alumina substrate.
Designed per IEC61000-4-2 Level 4 (±30 kV contact), it delivers Class 3B HBM ESD rating (>16 kV) with low leakage (<50 nA) and tight breakdown tolerance (25.65–28.35 V @ 1 mA). The SOT-23 package supports high-density PCB layouts in space-constrained automotive and industrial modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 25.65–28.35 V @ 1 mA - defines precise clamping threshold for overvoltage events |
| Clamping Voltage | 38 V @ 1.0 A peak pulse - limits transient voltage to safe level during ESD surge |
| Working Reverse Voltage | 22 V - maximum continuous DC voltage before significant leakage begins |
| Peak Pulse Power | 40 W @ 1.0 ms - handles high-energy transients without failure |
| ESD Rating | ±30 kV contact per IEC61000-4-2 Level 4 - meets automotive-grade immunity requirements |
| Leakage Current | <50 nA @ 22 V - ensures minimal standby power loss and signal integrity |
| AEC-Q101 Qualified | Yes - validated for automotive underhood and body electronics applications |
Pinout & Package
SOT-23 (TO-236) package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting plastic case with corrosion-resistant finish; lead solder temperature rated to 260 °C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | First Zener anode - connects to protected line 1 in unidirectional mode or forms one side of bidirectional clamp |
| Pin 2 | Anode 2 | Second Zener anode - connects to protected line 2 in unidirectional mode or completes bidirectional path with Pin 1 |
| Pin 3 | Cathode (Common) | Shared cathode node - ties both Zeners to ground or reference rail; enables compact dual-line protection |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-cathode topology | Protects two independent signal lines using one SOT-23 footprint - saves >50% board area vs. discrete diodes |
| Bidirectional configuration capability | Pins 1 and 2 function as symmetrical terminals - eliminates need for external series coupling capacitors in AC-coupled buses |
| UL 94 V-0 flammability rating | Self-extinguishing plastic housing - satisfies safety requirements for enclosed industrial and automotive enclosures |
| Pb-free construction | RoHS-compliant materials and plating - supports global environmental compliance without derating |
| Automotive-grade qualification | AEC-Q101 stress-tested across −55 °C to +150 °C - ensures reliability in engine control units and ADAS sensor interfaces |
Applications
| Single-Wire CAN Bus Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Transient suppression on SAE J2411-compliant single-wire CAN networks in vehicle ECUs and body control modules. IC Role / Device Role / Timing Role: Bidirectional TVS diode clamping bus voltage during ESD events and load-dump spikes. Use Value: Limits clamped voltage to 38 V at 1.0 A, preventing damage to single-wire CAN transceivers operating at 22 V nominal. | Use Scenario: Input/output line protection for PLC digital modules exposed to field wiring surges and induced transients. IC Role / Device Role / Timing Role: Dual-line unidirectional Zener clamp - protects two isolated 24 V DC inputs simultaneously. Use Value: Enables shared ground return via Pin 3 while maintaining independent 22 V working voltage per channel. |
| Medical Equipment ESD Shielding | Point-of-Sale Terminal Interface Protection |
Use Scenario: ESD safeguarding of USB, RS-232, and analog sensor interfaces in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-leakage (<50 nA) dual Zener - preserves signal fidelity on high-impedance biomedical sensor traces. Use Value: Delivers ±30 kV IEC61000-4-2 contact discharge immunity without degrading measurement accuracy. | Use Scenario: Surge protection for customer-facing payment terminal buttons, display data lines, and card reader interfaces. IC Role / Device Role / Timing Role: Compact dual-clamp suppressing human-body-model discharges near user-accessible connectors. Use Value: Fits within 2.9 mm × 1.3 mm footprint - allows full ESD coverage without enlarging consumer enclosure. |
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 |
|---|---|---|---|
| SZMMBZ27VCLT1G | Same electrical specs and package; differs only in tape-and-reel quantity (3,000 vs. 10,000 units per reel) | No functional difference - suitable for prototyping or low-volume production where smaller reels preferred | Select when matching small-batch procurement cycles or evaluating layout compatibility prior to volume ramp |
| SMF27A | Single-channel 27 V TVS; 200 W peak power; DO-214AA package - larger footprint, higher pulse handling | Requires two devices for dual-line protection; not pin-compatible; better suited for high-energy industrial surges | Choose only if system-level testing confirms need for >40 W pulse energy per line and board space permits larger package |
Compared with SZMMBZ27VCLT1G, the SZMMBZ27VCLT3G offers identical performance in a higher-volume reel format; versus SMF27A, it provides integrated dual-line protection in half the PCB area but with lower per-line surge capacity.
Availability
SZMMBZ27VCLT3G is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O modules, and medical sensor interface development requiring stable component supply and AEC-Q101-compliant transient protection.
Supply support for SZMMBZ27VCLT3G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, and medical applications.
The SZMMBZxxVxL series targets compact, high-reliability transient voltage suppression in automotive and industrial systems, emphasizing AEC-Q101 qualification, ultra-low leakage, and dual-junction integration in standard SOT-23 packaging.
FAQ
What is the clamping voltage of the SZMMBZ27VCLT3G at its rated peak pulse current?
The SZMMBZ27VCLT3G has a clamping voltage of 38 V at 1.0 A peak pulse current (IPP), measured per the Figure 5 waveform in the official onsemi datasheet. This value ensures reliable protection of downstream 24 V logic interfaces during ESD events. The SZMMBZ27VCLT3G maintains this clamping performance across its qualified temperature range of −55 °C to +150 °C.
Is the SZMMBZ27VCLT3G suitable for bidirectional signal line protection?
Yes, the SZMMBZ27VCLT3G supports bidirectional protection by connecting Pins 1 and 2 across the signal line and Pin 3 to ground - forming a symmetrical Zener pair. Its dual common-cathode structure enables this configuration without external components. The SZMMBZ27VCLT3G achieves ±30 kV IEC61000-4-2 contact discharge immunity in this mode.
Does the SZMMBZ27VCLT3G meet automotive qualification standards?
Yes, the SZMMBZ27VCLT3G is AEC-Q101 qualified and PPAP capable, with testing performed across −55 °C to +150 °C junction temperature range. Its Pb-free SOT-23 construction and UL 94 V-0 flammability rating further support deployment in automotive body electronics and powertrain control units. The SZMMBZ27VCLT3G is explicitly listed in onsemi's automotive-grade product portfolio.
What is the maximum steady-state power dissipation of the SZMMBZ27VCLT3G on a standard FR-5 PCB?
The SZMMBZ27VCLT3G dissipates up to 225 mW continuously on an FR-5 board at 25 °C ambient, with derating of 1.8 mW/°C above that temperature. This rating assumes standard JEDEC test conditions (1.0 × 0.75 × 0.62 inch board). The SZMMBZ27VCLT3G thermal resistance is 556 °C/W under these conditions.
How does the pin configuration of the SZMMBZ27VCLT3G enable dual-line protection?
The SZMMBZ27VCLT3G uses Pin 1 and Pin 2 as independent anodes and Pin 3 as their shared cathode, allowing simultaneous protection of two separate signal lines referenced to a common ground. Each anode–cathode path operates as a 27 V Zener, enabling discrete clamping without crosstalk. This architecture is confirmed in the onsemi marking diagram and mechanical outline Style 9.
SZMMBZ27VCLT3G 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZMMBZ27VCLT3G FAQ
1.How can I place an order for SZMMBZ27VCLT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ27VCLT3G 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 SZMMBZ27VCLT3G reliable?
The price and inventory of SZMMBZ27VCLT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ27VCLT3G is usually 5 days.
3.What payment methods are accepted for SZMMBZ27VCLT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ27VCLT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ27VCLT3G?
SZMMBZ27VCLT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ27VCLT3G 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 SZMMBZ27VCLT3G?
For technical support, including SZMMBZ27VCLT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ27VCLT3G requirements.
6.How does Aetrix verify that SZMMBZ27VCLT3G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ27VCLT3G 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 SZMMBZ27VCLT3G meets industry standards.
7.What is the process for return or replacement of SZMMBZ27VCLT3G?
All SZMMBZ27VCLT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ27VCLT3G, 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 SZMMBZ27VCLT3G part is unused and in its original packaging.
Return procedure for SZMMBZ27VCLT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMMBZ27VCLT3G 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
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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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