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onsemi SZNUP2124MXWTBG
- Part No.:
- SZNUP2124MXWTBG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 3-XFDFN
- Datasheet:
-
SZNUP2124MXWTBG.pdf
- Description:
- 28V CAN-FD ESD PROTECTION IN WDF
- Quantity:
- Payment:
- Shipping:
Inventory:13,514
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Product details
Overview
SZNUP2124MXWTBG from onsemi is a dual-channel bidirectional ESD and surge protection diode array designed specifically for CAN and CAN-FD bus lines. It features 24 V reverse working voltage, <6 pF line-to-GND capacitance at 5 V bias, 40 V clamping voltage at 1 A (8/20 µs), 175°C max junction temperature, and AEC-Q101 qualification - enabling robust transient suppression in automotive high-speed data networks.
For engineers reviewing the SZNUP2124MXWTBG datasheet, pinout, applications, or equivalent options, key selection criteria include low-capacitance bidirectional protection, IEC 61000-4-2 Level 4 (±12.5 kV contact) compliance, wettable flank XDFNW3 package for AOI, and ISO 7637-3 EFT survivability up to 50 A (5/50 ns).
Technical Context
The SZNUP2124MXWTBG integrates two matched Zener-based bidirectional TVS diodes in a single die, optimized for CAN_H/CAN_L line protection. Its low dynamic resistance (<0.5 Ω typical) and sub-100 nA reverse leakage at 24 V ensure minimal signal distortion and DC loading on high-speed differential buses.
It operates within −55°C to +175°C junction temperature range and meets stringent automotive immunity standards: IEC 61000-4-4 (50 A EFT), IEC 61000-4-5 (3.0 A lightning), and ISO 7637-3 pulse 'a'/'b' - all verified with clamping voltage ≤40 V at rated peak current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24 V - Matches nominal CAN bus operating voltage; ensures no conduction during normal 12 V system operation with margin. |
| VBR (min/typ/max) | 26 / 27 / 33 V - Tight breakdown distribution enables predictable turn-on before transceiver damage threshold. |
| VC @ IPP = 1 A | 40 V - Clamps transient energy below CAN transceiver absolute maximum rating (typically ±40 V). |
| CJ @ VR = 5 V | <6 pF - Preserves signal integrity up to 5 Mbps CAN-FD data rates without edge degradation. |
| IR @ VRWM | <100 nA - Negligible DC loading on bus termination resistors; avoids baseline voltage shift. |
| TJ(max) | 175°C - Supports under-hood placement in modern EV/ADAS ECUs without thermal derating. |
| IEC 61000-4-2 | ±12.5 kV contact - Exceeds automotive OEM requirements (e.g., Ford WDC 10278, GMW3172) for ESD robustness. |
Pinout & Package
Package: XDFNW3 (Case 521AC), 1 mm × 1 mm × 0.4 mm, wettable flank, Pb-free, RoHS-compliant. Pin 1 marked by top-side dot; pin 1–3 arranged linearly with exposed thermal pad (pin 2) centered.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | CAN_H Protection Anode/Cathode | Bidirectional ESD path for CAN_H line; connects internally to one Zener junction anode and cathode. |
| Pin 2 | Exposed Thermal Pad / GND | Primary heat dissipation path and low-inductance ground reference; must be soldered to PCB ground plane. |
| Pin 3 | CAN_L Protection Anode/Cathode | Bidirectional ESD path for CAN_L line; symmetric structure to Pin 1 for matched clamping behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Low parasitic capacitance | <6 pF at 5 V bias - Enables clean 5 Mbps CAN-FD eye diagrams without added jitter or rise-time degradation. |
| Matched diode capacitance | ≤0.25 pF difference between CAN_H and CAN_L channels - Maintains common-mode noise rejection and differential signal symmetry. |
| High-temperature rating | 175°C TJ(max) - Allows direct placement near powertrain or ADAS SoCs without external thermal management. |
| Wettable flank package | Side-wettable leads enable automated optical inspection (AOI) of solder joint quality - critical for zero-defect automotive manufacturing. |
| AEC-Q101 qualification | Qualified per stress test conditions including HTGB, TCT, UHAST - validates reliability for safety-critical vehicle networks. |
Applications
| Automotive CAN Gateway | ADAS Camera Module Interface |
|---|---|
|
Use Scenario: High-speed communication between engine control unit (ECU) and body domain controller via 500 kbps CAN FD backbone. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on CAN_H/CAN_L differential pair, placed immediately before transceiver input pins. Use Value: Prevents latch-up or permanent damage to CAN transceivers during load-dump-induced EFT events (ISO 7637-3 pulse 'a', 50 A). |
Use Scenario: Front-facing camera module transmitting image data over CAN-FD to central ADAS processor in autonomous driving systems. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp protecting differential signaling path against ±12.5 kV contact discharge per IEC 61000-4-2. Use Value: Ensures uninterrupted video streaming by limiting clamping voltage to ≤40 V during ESD events - below transceiver failure threshold. |
| Electric Powertrain Inverter Control | Commercial Vehicle Telematics Unit |
|
Use Scenario: Isolated CAN interface between motor control MCU and inverter gate driver board in 800 V EV platforms. IC Role / Device Role / Timing Role: Surge protector co-located with CAN transceiver on high-noise inverter PCB, referenced to local chassis ground. Use Value: Withstands repetitive 50 A EFT pulses (ISO 7637-3) without parameter drift - maintains long-term signal integrity in high-EMI environments. |
Use Scenario: Telematics control unit (TCU) in Class 8 trucks connecting to fleet management servers via cellular + CAN FD diagnostics port. IC Role / Device Role / Timing Role: Dual-line ESD guard for OBD-II connector's CAN_H/CAN_L pins exposed to field service personnel and harsh roadside ESD. Use Value: UL 94 V-0 flammability rating and 175°C operation ensure compliance with heavy-duty vehicle environmental certifications (SAE J1455, ISO 16750-4). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-line CAN bus protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Single-channel, 5.5 V VRWM, 0.5 pF capacitance - lower voltage rating, smaller package (X2SON), no AEC-Q101. | Targeted at low-voltage industrial CAN (e.g., 3.3 V microcontrollers), not automotive 12 V/24 V bus systems. | Select only for non-automotive, low-speed CAN designs where VRWM ≤5.5 V suffices and AEC-Q101 is not required. |
| SMF24CT | Single-diode, 24 V VRWM, 100 pF capacitance, TO-236 package - higher capacitance, larger footprint, no matched dual-channel design. | Requires two discrete devices for CAN_H/L; unsuitable for CAN-FD due to excessive signal distortion above 1 Mbps. | Use only for legacy low-speed CAN (≤125 kbps) where space and signal integrity are secondary to cost. |
Compared with TPD2E001DRYR and SMF24CT, the SZNUP2124MXWTBG uniquely delivers AEC-Q101-qualified dual-channel protection with <6 pF capacitance and 175°C operation - making it the only option validated for production CAN-FD networks in automotive powertrain and ADAS domains.
Availability
SZNUP2124MXWTBG is available at Aetrix Electronics and suitable for automotive CAN gateway modules, ADAS camera interfaces, electric powertrain inverter controls, and commercial vehicle telematics units requiring stable component supply across extended product lifecycles.
Supply support for SZNUP2124MXWTBG 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 management, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The SZNUP2124MXWTBG belongs to onsemi's automotive-grade transient voltage suppression portfolio, engineered specifically to meet ISO 11898-2 and AEC-Q101 requirements for CAN/CAN-FD physical layer protection in harsh vehicular environments.
FAQ
What is the primary function of the SZNUP2124MXWTBG in a CAN network?
The SZNUP2124MXWTBG serves as a dual-channel bidirectional transient voltage suppressor for CAN_H and CAN_L lines. It protects downstream CAN transceivers from ESD (up to ±12.5 kV contact), EFT (50 A), and lightning surges (3.0 A) by clamping transients to ≤40 V while adding less than 6 pF capacitance - preserving signal integrity for CAN-FD data rates up to 5 Mbps. The SZNUP2124MXWTBG achieves this using matched Zener junctions in an ultra-compact XDFNW3 package.
Does the SZNUP2124MXWTBG support CAN-FD protocols?
Yes, the SZNUP2124MXWTBG is explicitly designed for CAN-FD applications. Its <6 pF capacitance at 5 V bias minimizes signal distortion on high-speed differential pairs, and its 40 V clamping voltage at 1 A (8/20 µs) remains well below the absolute maximum ratings of CAN-FD transceivers (e.g., TJA1043, TCAN1042). The device is tested per ISO 7637-3 and IEC 61000-4-4 to ensure reliable operation at 2–5 Mbps data rates in automotive environments.
Is the SZNUP2124MXWTBG qualified for automotive use?
Yes, the SZNUP2124MXWTBG carries the "SZ" prefix indicating AEC-Q101 qualification and PPAP capability. It has passed stress tests including high-temperature gate bias (HTGB), temperature cycling (TCT), and unbiased highly accelerated stress testing (UHAST). Its 175°C maximum junction temperature and wettable flank XDFNW3 package further validate its suitability for under-hood automotive applications such as engine control, ADAS, and battery management systems.
How does the SZNUP2124MXWTBG differ from standard TVS diodes like SMAJ24A?
Unlike general-purpose unidirectional TVS diodes such as SMAJ24A, the SZNUP2124MXWTBG is a dual-channel, bidirectional, low-capacitance device optimized for differential CAN bus protection. It provides matched capacitance (<0.25 pF mismatch), sub-100 nA leakage, and IEC/ISO-compliant surge immunity - whereas SMAJ24A is single-channel, unidirectional, has ~200 pF capacitance, and lacks automotive qualification or CAN-specific performance validation. The SZNUP2124MXWTBG replaces two discrete diodes with superior signal fidelity.
What is the significance of the "XDFNW3" package in the SZNUP2124MXWTBG?
The XDFNW3 package (1 mm × 1 mm × 0.4 mm) enables ultra-compact CAN bus protection layout with minimal PCB area. Its wettable flank leads allow automated optical inspection (AOI) of solder joints - a critical requirement for zero-defect automotive manufacturing. The exposed thermal pad (Pin 2) provides low-thermal-resistance path to PCB ground, supporting reliable power dissipation during repetitive surge events. This package is not interchangeable with SOIC or SOT-23 variants due to different pinout and thermal characteristics.
SZNUP2124MXWTBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 3-XFDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 26V
- Voltage - Clamping (Max) @ Ipp:
- 40V
- Current - Peak Pulse (10/1000µs):
- 3A (8/20µs)
- Power - Peak Pulse:
- 120W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 6pF @ 1MHz (Max)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 3-XDFNW (1x1)
SZNUP2124MXWTBG FAQ
1.How can I place an order for SZNUP2124MXWTBG through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNUP2124MXWTBG 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 SZNUP2124MXWTBG reliable?
The price and inventory of SZNUP2124MXWTBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNUP2124MXWTBG is usually 5 days.
3.What payment methods are accepted for SZNUP2124MXWTBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNUP2124MXWTBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNUP2124MXWTBG?
SZNUP2124MXWTBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNUP2124MXWTBG 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 SZNUP2124MXWTBG?
For technical support, including SZNUP2124MXWTBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNUP2124MXWTBG requirements.
6.How does Aetrix verify that SZNUP2124MXWTBG is sourced from the original manufacturer or authorized distributors?
All SZNUP2124MXWTBG 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 SZNUP2124MXWTBG meets industry standards.
7.What is the process for return or replacement of SZNUP2124MXWTBG?
All SZNUP2124MXWTBG units undergo pre-shipment inspection (PSI). If there is an issue with SZNUP2124MXWTBG, 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 SZNUP2124MXWTBG part is unused and in its original packaging.
Return procedure for SZNUP2124MXWTBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZNUP2124MXWTBG Tags
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