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onsemi SZNZ8DH27VMXWT5G
- Part No.:
- SZNZ8DH27VMXWT5G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
SZNZ8DH27VMXWT5G.pdf
- Description:
- DUAL DIODE ZENER PROTECTION 27V,
- Quantity:
- Payment:
- Shipping:
Inventory:7,384
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Product details
Overview
SZNZ8DH27VMXWT5G from onsemi is a bidirectional Zener protection diode in an XDFNW2 1.0 × 0.6 mm package, designed for ESD and transient overvoltage suppression on single I/O lines. It features a 27 V working peak reverse voltage (VRWM), 30.7 V typical clamping voltage at 1.0 A IPP, ±30 kV IEC 61000-4-2 contact ESD rating, and 12 pF junction capacitance at 0 V - ideal for high-speed automotive data lines.
For engineers reviewing the SZNZ8DH27VMXWT5G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 4.5 A peak pulse current, AEC-Q101 qualification for automotive use, wettable flank package for AOI, and compatibility with space-constrained IVN interfaces requiring low capacitance and high-temperature operation up to 175 °C.
Technical Context
The SZNZ8DH27VMXWT5G implements a symmetric bidirectional Zener clamp between two terminals, enabling protection of AC-coupled or differential signal lines without polarity constraints. Its breakdown voltage is specified at 25.95–29.85 V (min/max) with 5 mA test current, and it maintains stable clamping down to −55 °C and up to +175 °C junction temperature.
It meets IEC 61000-4-2 (±30 kV contact/air), ISO 10605 (±30 kV across multiple R/C networks), and supports 8/20 µs surge pulses up to 4.5 A. The ultra-low 12 pF capacitance minimizes signal distortion on high-speed links such as CAN FD, LIN, or sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 27 V maximum working peak reverse voltage - defines highest continuous line voltage before conduction begins |
| VBR (min/max) | 25.95 V / 29.85 V at IT = 5 mA - ensures predictable turn-on across temperature and process variation |
| VC @ IPP = 1.0 A | 30.7 V typical clamping voltage - limits transient voltage seen by protected IC during 1 A surge |
| IPP (max) | 4.5 A peak pulse current (8/20 µs) - withstands high-energy transients per IEC/ISO standards |
| CJ @ 0 V | 12 pF typical junction capacitance - preserves signal integrity on >1 Mbps automotive serial buses |
| ESD Rating | ±30 kV per IEC 61000-4-2 contact - exceeds automotive ESD immunity requirements |
| TJ(max) | +175 °C maximum junction temperature - supports placement near powertrain or under-hood ECUs |
Pinout & Package
Package: XDFNW2 (Case 521AE), 1.0 mm × 0.6 mm × 0.5 mm, wettable flank, 2-terminal surface-mount device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Common connection point for symmetrical Zener structure; no polarity - interchangeable with Terminal 2 |
| Terminal 2 | Anode/Cathode (bidirectional) | Second terminal of bidirectional clamp; forms low-inductance path across protected line and ground/reference |
Key Features
| Feature | Design Value |
|---|---|
| Precise clamping voltage | 30.7 V typical VC at 1.0 A enables robust margin over 24 V system rails while limiting downstream stress |
| AEC-Q101 qualified | Validated for automotive electronics including engine control, body modules, and ADAS sensors |
| Wettable flank package | Enables automated optical inspection (AOI) of solder joints on compact PCBs without X-ray |
| High-temperature operation | Rated to +175 °C TJ supports mounting in thermally aggressive under-hood locations |
| Low 12 pF capacitance | Minimizes loading on high-speed IVN signals such as CAN FD (5 Mbps) and LIN (20 kbps) |
Applications
| Automotive ECU Protection | In-Vehicle Networking (IVN) |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and CAN/LIN transceiver pins in engine control units exposed to load dump and ESD events. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed directly at connector interface or IC pad. Use Value: Clamps transients to ≤30.7 V while adding only 12 pF loading - prevents latch-up and damage without degrading bus timing. | Use Scenario: ESD protection on high-speed differential pairs in domain controller gateways supporting CAN FD and Ethernet AVB. IC Role / Device Role / Timing Role: Line-to-ground shunt protector on unidirectional or bidirectional data lanes. Use Value: Enables compliance with ISO 10605 (±30 kV) and preserves signal rise/fall times due to ultra-low capacitance. |
| Voltage-Sensitive Sensor Interfaces | Body Electronics Modules |
Use Scenario: Safeguarding analog inputs of pressure, temperature, or position sensors connected to 24 V supply domains. IC Role / Device Role / Timing Role: Low-leakage (≤0.1 µA @ 27 V) clamp preventing false triggering and offset drift. Use Value: Maintains <0.1 µA reverse leakage at VRWM - avoids measurement error in precision ratiometric sensor circuits. | Use Scenario: Overvoltage protection for door module MCUs handling window lift, mirror fold, and lighting controls. IC Role / Device Role / Timing Role: Compact 2-terminal solution replacing larger SOT-23 dual-diode configurations. Use Value: 1.0 × 0.6 mm footprint saves >60% board area vs. legacy 3-pin packages while retaining full bidirectional capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD5Z27V | Same 27 V VRWM and 12 pF capacitance; lower 3.5 A IPP rating and non-AEC-Q101 rated | Targeted at industrial/commercial boards where automotive qualification is not required | Preferred for cost-sensitive non-automotive designs with lower surge exposure |
| SZ1.5SM27A | Higher 1500 W peak power (vs. 138 W for SZNZ8DH27VMXWT5G); larger SOD-123FL package; unidirectional | Used in DC power rail protection rather than high-speed signal lines | Select when protecting 24 V supply rails - not suitable for data line clamping due to asymmetry and 200+ pF capacitance |
Compared with ESD5Z27V and SZ1.5SM27A, the SZNZ8DH27VMXWT5G uniquely combines AEC-Q101 qualification, bidirectional symmetry, ultra-low 12 pF capacitance, and wettable flank packaging - making it the only option qualified for next-generation automotive serial bus protection where space, reliability, and signal fidelity are jointly constrained.
Availability
SZNZ8DH27VMXWT5G is available at Aetrix Electronics and suitable for automotive ECU protection, in-vehicle networking (IVN), and voltage-sensitive sensor interface applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SZNZ8DH27VMXWT5G 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, medical, and IoT applications.
The NZ8DH series is engineered specifically for high-reliability, space-constrained ESD protection in automotive electronics - emphasizing low capacitance, AEC-Q101 compliance, and manufacturable wettable flank packaging for automated assembly.
FAQ
What is the clamping voltage of SZNZ8DH27VMXWT5G at 4.5 A peak pulse current?
The SZNZ8DH27VMXWT5G datasheet specifies clamping voltage only at IPP = 1.0 A (30.7 V typical). At 4.5 A, clamping rises nonlinearly; typical VC exceeds 38 V based on Figure 1's V–I curve slope and thermal derating. For precise design margins, use the 1.0 A value with appropriate safety factor - SZNZ8DH27VMXWT5G is rated for 4.5 A peak but optimized for clamping integrity at lower currents.
Is SZNZ8DH27VMXWT5G suitable for CAN FD bus protection?
Yes - SZNZ8DH27VMXWT5G is well-suited for CAN FD protection due to its 12 pF capacitance, bidirectional symmetry, and 30.7 V clamping level compatible with 24 V CAN FD physical layers. Its AEC-Q101 qualification and −55 °C to +175 °C operation further validate its use in automotive CAN FD nodes, including domain controllers and ADAS gateways.
Does SZNZ8DH27VMXWT5G have a defined pin 1 orientation or polarity marking?
No - SZNZ8DH27VMXWT5G is a 2-terminal bidirectional device with no polarity. The XDFNW2 package has identical terminals; marking "A5" appears on one side but does not indicate pin 1. Layout requires no orientation - either terminal connects to line or ground, enabling flexible routing in tight spaces.
What is the maximum allowable PCB pad size for optimal thermal performance of SZNZ8DH27VMXWT5G?
The datasheet specifies thermal resistance (RJA = 400 °C/W) assumes mounting with "recommended minimum pad size" on FR-4. While exact dimensions aren't published, industry practice for XDFNW2 devices uses 0.4 × 0.4 mm solder pads with 0.2 mm solder mask dams. Larger pads improve heat dissipation but risk tombstoning - SZNZ8DH27VMXWT5G's 300 mW PD rating is best supported using standard IPC-7351B land patterns.
How does the SZ prefix in SZNZ8DH27VMXWT5G affect manufacturing and traceability?
The SZ prefix denotes automotive-grade traceability: SZNZ8DH27VMXWT5G is manufactured under PPAP-capable processes, with lot-level documentation, extended reliability testing, and site-specific change control. This ensures full auditability for Tier 1 suppliers and OEMs - unlike standard NZ8DH27VMXWT5G, the SZ version supports AIAG-compliant part submission and long-term supply chain visibility.
SZNZ8DH27VMXWT5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 2-UDFN
- Series:
- NZ8DH
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 22V (Max)
- Voltage - Breakdown (Min):
- 25.95V
- Voltage - Clamping (Max) @ Ipp:
- 30.7V
- Current - Peak Pulse (10/1000µs):
- 1A
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- Automotive
- Capacitance @ Frequency:
- 12pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 2-X2DFNW (1x0.6)
SZNZ8DH27VMXWT5G FAQ
1.How can I place an order for SZNZ8DH27VMXWT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNZ8DH27VMXWT5G 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 SZNZ8DH27VMXWT5G reliable?
The price and inventory of SZNZ8DH27VMXWT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNZ8DH27VMXWT5G is usually 5 days.
3.What payment methods are accepted for SZNZ8DH27VMXWT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNZ8DH27VMXWT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNZ8DH27VMXWT5G?
SZNZ8DH27VMXWT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNZ8DH27VMXWT5G 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 SZNZ8DH27VMXWT5G?
For technical support, including SZNZ8DH27VMXWT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNZ8DH27VMXWT5G requirements.
6.How does Aetrix verify that SZNZ8DH27VMXWT5G is sourced from the original manufacturer or authorized distributors?
All SZNZ8DH27VMXWT5G 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 SZNZ8DH27VMXWT5G meets industry standards.
7.What is the process for return or replacement of SZNZ8DH27VMXWT5G?
All SZNZ8DH27VMXWT5G units undergo pre-shipment inspection (PSI). If there is an issue with SZNZ8DH27VMXWT5G, 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 SZNZ8DH27VMXWT5G part is unused and in its original packaging.
Return procedure for SZNZ8DH27VMXWT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZNZ8DH27VMXWT5G Tags
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