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onsemi SZNUP2124MXWTAG
- Part No.:
- SZNUP2124MXWTAG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 3-XFDFN
- Datasheet:
-
SZNUP2124MXWTAG.pdf
- Description:
- 28V CAN-FD ESD PROTECTION IN WDF
- Quantity:
- Payment:
- Shipping:
Inventory:5,350
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Product details
Overview
SZNUP2124MXWTAG from onsemi is a dual-channel bidirectional ESD and surge protection diode array designed 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 SZNUP2124MXWTAG datasheet, pinout, applications, or equivalent options, key selection criteria include low-capacitance bidirectional clamping for CAN-FD signal integrity, IEC 61000-4-2 Level 4 (±12.5 kV contact) ESD performance, ISO 7637-3 EFT immunity up to 50 A, wettable flank XDFNW3 package for AOI, and automotive-grade reliability under −55°C to +175°C operation.
Technical Context
The SZNUP2124MXWTAG implements two matched Zener-based bidirectional TVS diodes in a monolithic silicon structure optimized for CAN/CAN-FD differential pair protection. Its low dynamic resistance (<0.5 Ω typical) and sub-100 nA reverse leakage at 24 V ensure minimal loading on high-impedance transceiver inputs while maintaining fast turn-on response to ESD events.
It meets stringent automotive EMC requirements including ISO 7637-3 pulse 'a' (−60 V, 50 A) and pulse 'b' (+40 V), IEC 61000-4-4 EFT (50 A, 5/50 ns), and IEC 61000-4-5 lightning surge (3.0 A, 8/20 µs). The device operates without external bias and relies solely on junction breakdown characteristics for clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24 V - Matches nominal CAN bus common-mode range and exceeds ISO 11898-2 max 16 V DC operating voltage. |
| VBR (min/typ/max) | 26 / 27 / 33 V - Ensures reliable conduction onset before transceiver damage thresholds during transients. |
| VC @ IPP = 1 A | 40 V - Clamps peak voltage below CAN transceiver absolute maximum ratings (typically ±40 V). |
| CJ @ VR = 5 V | <6 pF - Preserves signal edge integrity for CAN-FD data rates up to 5 Mbps with negligible rise-time degradation. |
| IR @ VRWM | <100 nA - Prevents DC loading of transceiver termination resistors and avoids baseline shift in low-power nodes. |
| TJ(max) | 175°C - Supports placement near powertrain ECUs and under-hood modules without thermal derating. |
| IEC 61000-4-2 | ±12.5 kV contact - Exceeds Level 4 requirement and enables compliance in harsh automotive assembly environments. |
Pinout & Package
Package: XDFNW3 (Case 521AC), 1.0 mm × 1.0 mm × 0.4 mm, wettable flank, Pb-free, RoHS-compliant surface-mount package with exposed thermal pad (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | CAN_H Protection Anode/Cathode | Bidirectional clamping node for CAN_H line - connects directly to transceiver CAN_H pin and bus trace. |
| Pin 2 | GND | Common reference for both protection channels - must be low-inductance connection to system ground plane. |
| Pin 3 | CAN_L Protection Anode/Cathode | Bidirectional clamping node for CAN_L line - symmetric layout ensures matched capacitance and clamping behavior vs. Pin 1. |
Key Features
| Feature | Design Value |
|---|---|
| Dual bidirectional Zener architecture | Enables single-device protection of differential CAN_H/CAN_L pair without polarity sensitivity or external biasing. |
| <6 pF line-to-GND capacitance | Maintains signal fidelity for CAN-FD 5 Mbps operation by limiting capacitive loading on high-speed differential traces. |
| AEC-Q101 qualified & PPAP capable | Validated for automotive production use with stress testing across temperature, humidity, and mechanical shock profiles. |
| Wettable flank leads | Supports automated optical inspection (AOI) of solder joint quality - critical for zero-defect automotive manufacturing. |
| UL 94 V-0 flammability rating | Meets automotive cabin and under-hood material safety standards for flame propagation resistance. |
Applications
| Automotive High-Speed CAN | Automotive CAN-FD Networks |
|---|---|
|
Use Scenario: Engine control unit (ECU) communicating with transmission and ABS modules over 1 Mbps CAN backbone. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed between CAN transceiver and bus connector to absorb ESD and load-dump induced surges. Use Value: Prevents latch-up or permanent damage to ISO 11898-2 compliant transceivers during vehicle assembly ESD events and roadside maintenance. |
Use Scenario: ADAS domain controller exchanging sensor fusion data with camera and radar modules via 2–5 Mbps CAN-FD links. IC Role / Device Role / Timing Role: Low-capacitance bus protector ensuring signal integrity while clamping fast-rising ESD pulses on differential pairs. Use Value: Enables reliable high-speed communication without added jitter or bit errors caused by parasitic capacitance or inconsistent clamping. |
| Fault-Tolerant CAN Systems | Commercial Vehicle Telematics |
|
Use Scenario: Body control module implementing ISO 11898-3 fault-tolerant CAN for lighting and door control in 24 V truck platforms. IC Role / Device Role / Timing Role: Dual-channel protector handling asymmetric transients on CAN_H and CAN_L while preserving fault detection logic. Use Value: Maintains bus operability during single-line short-to-battery or short-to-ground faults by avoiding false triggering or latch-up. |
Use Scenario: Fleet telematics gateway connecting J1939 engine data to cellular modem and GPS receiver in heavy-duty trucks. IC Role / Device Role / Timing Role: Surge guard for CAN interface exposed to long harness runs and high EMI environments near alternators and starters. Use Value: Survives repeated ISO 7637-3 pulse 'a'/'b' transients (50 A, −60 V/+40 V) without parameter drift or failure over 15-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel 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 and no CAN-FD support. | Limited to low-speed LIN or USB I/O; unsuitable for 24 V CAN bus clamping. | Select only for sub-6 V data lines where ultra-low capacitance outweighs voltage capability. |
| SM712-TR | 12 V VRWM, 100 pF capacitance, higher clamping (70 V) - mismatched for CAN-FD signal integrity. | Designed for RS-485/RS-232; excessive capacitance degrades >1 Mbps edges. | Use only in legacy low-speed CAN (≤125 kbps) where board space allows larger SO-8 package. |
Compared with TPD2E001DRYR and SM712-TR, the SZNUP2124MXWTAG uniquely combines 24 V VRWM, <6 pF capacitance, and AEC-Q101 qualification - making it the only option that simultaneously satisfies CAN-FD signal integrity, automotive voltage margin, and production-grade reliability requirements.
Availability
SZNUP2124MXWTAG is available at Aetrix Electronics and suitable for automotive ECU design, CAN-FD gateway development, and commercial vehicle telematics requiring stable component supply through extended product lifecycles.
Supply support for SZNUP2124MXWTAG 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The SZNUP2124MXWTAG belongs to onsemi's automotive-qualified transient voltage suppression portfolio, engineered specifically to meet ISO 11898-2/3 and IEC 61000-4-x immunity requirements in harsh vehicular environments.
FAQ
What is the primary function of the SZNUP2124MXWTAG in a CAN network?
The SZNUP2124MXWTAG serves as a dual-channel bidirectional transient voltage suppressor protecting CAN_H and CAN_L lines from ESD, EFT, and lightning-induced surges. Its 24 V VRWM and 40 V clamping voltage ensure compatibility with ISO 11898-2 transceivers, while its <6 pF capacitance preserves signal integrity for CAN-FD data rates - making the SZNUP2124MXWTAG essential for automotive-grade bus reliability.
Does the SZNUP2124MXWTAG require external biasing or control signals?
No, the SZNUP2124MXWTAG operates passively using Zener junction clamping and requires no external power, bias voltage, or enable signals. It functions automatically when transient voltages exceed its breakdown threshold (26–33 V), diverting surge current to GND through its low-dynamic-resistance path - a key advantage of the SZNUP2124MXWTAG in space-constrained automotive PCB layouts.
Is the SZNUP2124MXWTAG compatible with both high-speed CAN and CAN-FD physical layers?
Yes, the SZNUP2124MXWTAG is explicitly validated for both ISO 11898-2 high-speed CAN (1 Mbps) and CAN-FD (up to 5 Mbps) due to its <6 pF line-to-GND capacitance at 5 V bias and matched diode capacitance (<0.25 pF difference between channels). This ensures minimal skew and distortion on differential signals - a core specification confirmed in the SZNUP2124MXWTAG datasheet for CAN-FD compliance.
What automotive qualification does the SZNUP2124MXWTAG hold?
The SZNUP2124MXWTAG is AEC-Q101 qualified and PPAP capable, with full test documentation covering temperature cycling, HAST, mechanical shock, and ESD stress per automotive reliability standards. Its 175°C maximum junction temperature rating and UL 94 V-0 flammability certification further validate its suitability for under-hood and safety-critical ECU applications - distinguishing the SZNUP2124MXWTAG from generic industrial TVS diodes.
How does the XDFNW3 package of the SZNUP2124MXWTAG support automated manufacturing?
The XDFNW3 package of the SZNUP2124MXWTAG features wettable flank leads that enable reliable automated optical inspection (AOI) of solder fillets - a requirement for zero-defect automotive production. Its 1.0 mm × 1.0 mm footprint saves board space versus SO-8 or SOT-23 alternatives, and the exposed thermal pad (though unconnected) improves reflow profile consistency - all verified in the SZNUP2124MXWTAG package drawings and assembly guidelines.
SZNUP2124MXWTAG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 3-XFDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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)
SZNUP2124MXWTAG FAQ
1.How can I place an order for SZNUP2124MXWTAG through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNUP2124MXWTAG 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 SZNUP2124MXWTAG reliable?
The price and inventory of SZNUP2124MXWTAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNUP2124MXWTAG is usually 5 days.
3.What payment methods are accepted for SZNUP2124MXWTAG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNUP2124MXWTAG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNUP2124MXWTAG?
SZNUP2124MXWTAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNUP2124MXWTAG 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 SZNUP2124MXWTAG?
For technical support, including SZNUP2124MXWTAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNUP2124MXWTAG requirements.
6.How does Aetrix verify that SZNUP2124MXWTAG is sourced from the original manufacturer or authorized distributors?
All SZNUP2124MXWTAG 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 SZNUP2124MXWTAG meets industry standards.
7.What is the process for return or replacement of SZNUP2124MXWTAG?
All SZNUP2124MXWTAG units undergo pre-shipment inspection (PSI). If there is an issue with SZNUP2124MXWTAG, 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 SZNUP2124MXWTAG part is unused and in its original packaging.
Return procedure for SZNUP2124MXWTAG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZNUP2124MXWTAG Tags
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