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onsemi SZNUP2115LT3G
- Part No.:
- SZNUP2115LT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZNUP2115LT3G.pdf
- Description:
- TVS DIODE 24VWM 50VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,867
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Product details
Overview
SZNUP2115LT3G from onsemi is a dual bidirectional ESD protection diode in SOT−23 package, designed specifically for FlexRay bus transceivers. It delivers 200 W peak power dissipation per line (8/20 µs), clamps at 33.4 V @ 1 A and 44 V @ 3 A, and maintains ≤10 pF capacitance at 1 MHz to preserve high-speed signal integrity in automotive networks.
For engineers reviewing the SZNUP2115LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include IEC 61000−4−2 Level 4 ESD rating, ISO 7637−1/−3 surge compliance, low leakage (<100 nA), matched diode capacitance (≤2%), and AEC−Q101 qualification for automotive use.
Technical Context
The SZNUP2115LT3G implements a dual-channel Zener-based bidirectional clamping architecture optimized for transient suppression on differential FlexRay data lines. Each channel provides symmetrical breakdown at 26.2–32 V and clamps transients up to 3.0 A (8/20 µs) while maintaining sub-10 pF line-to-ground capacitance.
Its design targets automotive EMI robustness: it meets IEC 61000−4−4 (50 A EFT), IEC 61000−4−5 (3.0 A lightning), and ISO 7637−1 (8.0 A nonrepetitive pulse), with junction temperature range of −55 °C to +150 °C and UL 94 V−0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power Dissipation | 200 W per line (8/20 µs waveform) - handles high-energy ESD and EFT surges without failure |
| Clamping Voltage | 33.4 V @ 1 A, 44 V @ 3 A - limits voltage seen by FlexRay transceiver during surge events |
| Capacitance | ≤10 pF @ 0 V, 1 MHz - preserves signal integrity on >10 Mbps FlexRay data lines |
| Reverse Leakage | ≤100 nA @ 24 V - minimizes standby current impact on bus biasing |
| Breakdown Voltage | 26.2–32 V @ 1 mA - ensures reliable triggering above FlexRay common-mode operating range |
| ESD Rating | IEC 61000−4−2 Level 4 (±30 kV contact) - exceeds automotive OEM ESD immunity requirements |
| Operating Temp | −55 °C to +150 °C - supports under-hood and transmission control module environments |
Pinout & Package
SZNUP2115LT3G uses the SOT−23 (TO−236) package (2.90 × 1.30 × 1.00 mm), case 318, style 27 - confirmed as dual cathode configuration per onsemi marking diagram and mechanical outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (Channel A) | Connects to FlexRay data line A; forms one half of bidirectional clamp path |
| Pin 2 | Cathode (Channel B) | Connects to FlexRay data line B; enables independent protection per differential pair |
| Pin 3 | Common Anode / GND Reference | Shared ground return for both channels; must be low-inductance connection to system ground |
Key Features
| Feature | Design Value |
|---|---|
| Dual bidirectional clamping | Single SOT−23 device protects both FlexRay data lines symmetrically without polarity constraints |
| Capacitance matching | ≤2% difference between Channel A and B capacitance - ensures balanced signal propagation delay |
| AEC−Q101 qualified | Validated for automotive applications including engine control, chassis, and body electronics |
| Pb−Free & UL 94 V−0 | Meets RoHS and flammability safety standards for enclosed automotive modules |
| Low leakage current | 15 nA typical @ 24 V - avoids DC loading on biased FlexRay bus termination networks |
Applications
| FlexRay Bus Protection | Automotive Domain Controller EMI Hardening |
|---|---|
Use Scenario: Installed between FlexRay transceiver and connector to suppress ESD and EFT coupling from harnesses and mating connectors. IC Role / Device Role / Timing Role: Bidirectional voltage clamp that activates only during transients >26.2 V, remaining transparent during normal 2.5–3.3 V logic-level signaling. Use Value: Enables compliance with ISO 11898−4 and OEM-specific EMC test plans (e.g., GMW3172, Ford EMC-CS-2009) without altering transceiver layout. | Use Scenario: Integrated into domain controller PCB near FlexRay PHY interface to mitigate radiated and conducted noise from adjacent power converters and motor drivers. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor that prevents latch-up or damage to transceiver input stages during load dump or relay switching events. Use Value: Reduces need for additional ferrite beads or RC filters, lowering BOM cost and board area while maintaining >10 Mbps data rate stability. |
| Chassis Module Surge Suppression | Body Control Unit ESD Shielding |
Use Scenario: Mounted on chassis module PCBs (e.g., suspension control, brake-by-wire) exposed to high-energy transients from solenoid actuation and grounding faults. IC Role / Device Role / Timing Role: Robust surge protector rated for ISO 7637−1 Pulse 2 (8.0 A, 1/50 µs) and ISO 7637−3 EFT bursts (50 A, 5/50 ns). Use Value: Eliminates field failures caused by repetitive EFT-induced bit errors or transceiver resets in harsh under-vehicle environments. | Use Scenario: Placed at entry points of FlexRay interfaces in body control units to guard against human-body ESD events during service or assembly. IC Role / Device Role / Timing Role: IEC 61000−4−2 Level 4 (±30 kV contact) compliant protector that clamps within nanoseconds to limit voltage stress on transceiver ESD structures. Use Value: Passes OEM ESD validation (e.g., VW TL-81000, BMW GS 95024-2) without requiring redesign of housing or gasketing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Single-channel, 5.5 V VRWM, 0.8 pF typical capacitance - lower voltage rating and capacitance, not rated for ISO 7637 pulses | Targeted at USB/low-voltage I/O; lacks automotive surge ratings and dual-line integration | Select only for non-automotive, low-speed digital interfaces where <10 V working voltage applies |
| ESDALC6V1−M−2 | 6.1 V VRWM, 0.6 pF capacitance, IEC 61000−4−2 Level 4 - no ISO 7637−1/−3 certification, not AEC−Q101 qualified | Designed for consumer port protection; insufficient clamping headroom for 24 V FlexRay systems | Use only in non-automotive, 3.3 V logic applications with strict capacitance budgets (<1 pF) |
Compared with TPD2E001DRYR and ESDALC6V1−M−2, the SZNUP2115LT3G uniquely combines dual-line bidirectional protection, 24 V VRWM, 200 W surge capability, and full AEC−Q101/ISO 7637 compliance - making it the only drop-in solution for production FlexRay nodes requiring OEM-grade EMC robustness.
Availability
SZNUP2115LT3G is available at Aetrix Electronics and suitable for automotive FlexRay bus protection, chassis control module surge hardening, and body control unit ESD shielding requiring stable component supply across long-life vehicle programs.
Supply support for SZNUP2115LT3G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NUP2115L/SZNUP2115L product line was engineered specifically to meet stringent automotive EMC requirements for FlexRay and CAN FD networks, emphasizing low capacitance, matched channel performance, and high-reliability transient suppression in harsh environments.
FAQ
What is the primary circuit role of the SZNUP2115LT3G in a FlexRay system?
The SZNUP2115LT3G serves as a dual-channel bidirectional transient voltage suppressor placed directly at the FlexRay transceiver's data line inputs. It clamps ESD and surge events above 26.2 V while remaining high-impedance during normal operation, protecting the transceiver's sensitive input stages without affecting signal integrity. Its matched capacitance ensures balanced timing on differential pairs, and its 200 W peak power rating handles automotive-level transients defined in ISO 7637 and IEC 61000 standards. The SZNUP2115LT3G is integral to achieving OEM-compliant EMC performance in FlexRay nodes.
Is the SZNUP2115LT3G pin-compatible with other onsemi ESD protection devices like the NUP2105L?
No, the SZNUP2115LT3G is not pin-compatible with the NUP2105L. While both use SOT−23 packages, the NUP2105L follows style 12 (cathode–cathode–anode), whereas the SZNUP2115LT3G uses style 27 (cathode–cathode–cathode) per onsemi mechanical drawings. This difference means Pin 3 functions as common anode in NUP2105L but as cathode in SZNUP2115LT3G - requiring PCB layout revision for substitution. Always verify pinout using the official onsemi case outline document 98ASB42226B before replacement. The SZNUP2115LT3G requires dedicated routing for its unique dual-cathode configuration.
Does the SZNUP2115LT3G support bidirectional data lines without polarity concerns?
Yes, the SZNUP2115LT3G provides true bidirectional protection per channel due to its dual-Zener architecture. Pins 1 and 2 serve as cathodes for independent data lines, while Pin 3 acts as the shared anode reference - enabling symmetrical clamping for positive and negative transients on each line. This eliminates polarity sensitivity during installation and ensures consistent protection regardless of signal swing direction. Its 26.2–32 V breakdown range accommodates FlexRay's ±2.5 V differential signaling with margin, and the ≤2% capacitance matching between channels preserves differential timing skew. The SZNUP2115LT3G is explicitly validated for FlexRay bus protection in this configuration.
What is the maximum peak pulse current the SZNUP2115LT3G can handle, and under what waveform?
The SZNUP2115LT3G is rated for a maximum peak pulse current (IPP) of 3.0 A under the standardized 8/20 µs double-exponential waveform, as defined in Figure 1 of its datasheet. This rating corresponds to IEC 61000−4−5 lightning surge testing and ISO 7637−1 nonrepetitive pulse conditions. At this current, the device clamps to ≤50 V (typical 44 V), limiting stress on downstream transceivers. Derating applies above +25 °C ambient per the temperature power dissipation curve (Figure 6), and repeated surges must respect the device's thermal time constant. The SZNUP2115LT3G's 200 W peak power rating is specified under identical 8/20 µs conditions.
Is the SZNUP2115LT3G suitable for new automotive designs despite the "DISCONTINUED" note in the datasheet?
Yes - the "DISCONTINUED" label in the ordering table applies only to the *NUP2115LT3G* variant, not the *SZNUP2115LT3G*. Per page 2 of the datasheet, "SZNUP2115LT3G" is explicitly listed as active with "10,000 / Tape & Reel" shipping, and carries the SZ prefix denoting AEC−Q101 qualification and PPAP capability. The SZNUP2115LT3G remains fully supported for new automotive designs requiring FlexRay protection, with onsemi confirming its status via active distribution channels and automotive program engagement. Always specify the full SZNUP2115LT3G part number to ensure correct sourcing.
SZNUP2115LT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 24V (Min)
- Voltage - Breakdown (Min):
- 26.2V
- Voltage - Clamping (Max) @ Ipp:
- 50V
- Current - Peak Pulse (10/1000µs):
- 3A (8/20µs)
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 10pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZNUP2115LT3G FAQ
1.How can I place an order for SZNUP2115LT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNUP2115LT3G 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 SZNUP2115LT3G reliable?
The price and inventory of SZNUP2115LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNUP2115LT3G is usually 5 days.
3.What payment methods are accepted for SZNUP2115LT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNUP2115LT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNUP2115LT3G?
SZNUP2115LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNUP2115LT3G 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 SZNUP2115LT3G?
For technical support, including SZNUP2115LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNUP2115LT3G requirements.
6.How does Aetrix verify that SZNUP2115LT3G is sourced from the original manufacturer or authorized distributors?
All SZNUP2115LT3G 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 SZNUP2115LT3G meets industry standards.
7.What is the process for return or replacement of SZNUP2115LT3G?
All SZNUP2115LT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZNUP2115LT3G, 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 SZNUP2115LT3G part is unused and in its original packaging.
Return procedure for SZNUP2115LT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZNUP2115LT3G Tags
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ESD9B5.0ST5G
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D12V0L1B2LP-7B
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PESD2V0Y1BSFYL
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