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onsemi SZNUP1105LT1G
- Part No.:
- SZNUP1105LT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZNUP1105LT1G.pdf
- Description:
- TVS DIODE 24VWM 44VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:339
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Product details
Overview
SZNUP1105LT1G from onsemi is a bidirectional ESD protection diode in SOT-23 package, designed for single-line CAN and LIN bus transceivers. It delivers 350 W peak power dissipation (8 × 20 µs), clamps at 40 V @ 5 A, exhibits <100 nA reverse leakage at 24 V, and meets IEC 61000-4-2 Level 4 (±30 kV contact). It is AEC-Q101 qualified and used in automotive LIN networks.
For engineers reviewing the SZNUP1105LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM (24 V), VBR (25.7–28.4 V), clamping voltage (40 V @ 5 A), low capacitance (60 pF anode-to-GND), and AEC-Q101 qualification for automotive signal line protection.
Technical Context
The SZNUP1105LT1G implements dual-anode, single-cathode Zener-based bidirectional TVS architecture optimized for data-line surge suppression. Its symmetrical breakdown enables identical clamping in both polarities, supporting LIN and single-wire CAN protocols without polarity dependency.
It operates across −55 °C to +150 °C junction temperature, withstands 8.0 A peak pulse current (8 × 20 µs), and complies with IEC 61000-4-4 (40 A EFT) and IEC 61000-4-5 (8.0 A lightning surge), making it suitable for harsh automotive electrical environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24 V - Maximum continuous reverse operating voltage before conduction begins; matches typical LIN/CAN bus DC bias levels. |
| VBR | 25.7–28.4 V @ 1 mA - Breakdown threshold ensures reliable turn-on during transients while avoiding false triggering. |
| VC @ 5 A | 40 V - Clamping voltage limits transient overvoltage seen by downstream transceiver ICs during ESD/EFT events. |
| PPK | 350 W - Peak power handling capability per line under 8 × 20 µs waveform defines robustness against fast surges. |
| CJ | 60 pF (anode-to-GND) - Low capacitance preserves signal integrity on high-speed LIN (20.2 kbps) and single-wire CAN buses. |
| IR | <100 nA @ 24 V - Minimal leakage avoids loading of high-impedance bus lines and reduces standby power loss. |
| IEC 61000-4-2 | ±30 kV contact - Certified ESD immunity exceeds automotive OEM requirements for human-body discharge events. |
Pinout & Package
SZNUP1105LT1G uses the SOT-23 (TO-236) package (2.90 × 1.30 × 1.00 mm, Case 318, Style 27), marked "27H" with Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | First bidirectional protection path terminal; connects to protected data line (e.g., LIN Bus). |
| Pin 2 | Anode | Second anode terminal - forms symmetrical Zener pair with Pin 1 for bidirectional clamping. |
| Pin 3 | Cathode | Common cathode node tied to system ground; completes both Zener conduction paths during positive/negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Zener architecture | Enables symmetric ±24 V working voltage protection without polarity sensitivity on LIN/CAN data lines. |
| 350 W peak power rating | Handles severe EMI surges per IEC 61000-4-5 (8/20 µs, 8.0 A) without degradation in automotive environments. |
| 60 pF anode-to-GND capacitance | Minimizes signal distortion and timing skew on low-speed serial buses (LIN: 20.2 kbps, SW-CAN: up to 125 kbps). |
| AEC-Q101 qualification | Validated reliability for automotive underhood applications including temperature cycling, humidity, and mechanical shock. |
| UL 94 V-0 flammability rating | Ensures flame-retardant package material compliance for safety-critical vehicle electronics enclosures. |
Applications
| LIN Bus Protection | Single-Wire CAN Protection |
|---|---|
Use Scenario: Protecting LIN slave nodes (e.g., door modules, seat controls) from ESD during assembly, service, or operation. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between LIN transceiver and bus connector. Use Value: Limits clamped voltage to ≤40 V during ±30 kV ESD events, preventing transceiver latch-up or damage while maintaining <60 pF loading. | Use Scenario: Safeguarding fault-tolerant single-wire CAN nodes in body control modules where cost and space are constrained. IC Role / Device Role / Timing Role: Primary ESD/surge clamp on the single data line, referenced to chassis ground via Pin 3. Use Value: Withstands 40 A EFT bursts (IEC 61000-4-4) and 8 A lightning surges (IEC 61000-4-5), ensuring communication continuity in noisy 12 V systems. |
| Smart Distribution Systems (SDS®) | DeviceNet™ Node Protection |
Use Scenario: Securing SDS® smart power switches in HVAC or lighting control subsystems against load dump and coupling transients. IC Role / Device Role / Timing Role: Line-side TVS element on the digital command interface, co-located with the controller IC. Use Value: 24 V VRWM aligns with SDS® logic-level signaling; low leakage (<100 nA) prevents false triggering in high-impedance control inputs. | Use Scenario: Adding ESD resilience to DeviceNet™ drop-line connections in industrial automation panels exposed to maintenance personnel contact. IC Role / Device Role / Timing Role: Point-of-entry protector on the DeviceNet™ data pair (single-line variant), grounded at local node chassis. Use Value: 350 W peak power and ±30 kV ESD rating meet UL 61800-3 and IEC 61800-3 immunity requirements for drive interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD5Z3.3T5G | Lower VRWM (3.3 V), higher capacitance (120 pF), same SOT-23 package and AEC-Q101 rating. | Targeted at 3.3 V logic I/O lines-not suitable for 24 V LIN/CAN bus voltage rails. | Select only for low-voltage microcontroller GPIO protection; not a functional substitute for SZNUP1105LT1G's 24 V bus role. |
| SMF15A | Unidirectional, higher VRWM (15 V), larger SOD-123 package, no AEC-Q101 qualification. | Designed for general-purpose 12–15 V DC supply rail clamping-not optimized for bidirectional data-line ESD. | Use only in non-automotive, unidirectional, lower-reliability applications; lacks bidirectionality and automotive qualification required for SZNUP1105LT1G use cases. |
Compared with ESD5Z3.3T5G and SMF15A, the SZNUP1105LT1G uniquely combines 24 V VRWM, bidirectional Zener symmetry, 60 pF capacitance, and AEC-Q101 qualification-making it the only option validated for automotive LIN and single-wire CAN data-line protection in production systems.
Availability
SZNUP1105LT1G is available at Aetrix Electronics and suitable for automotive LIN bus design, single-wire CAN network implementation, and Smart Distribution Systems (SDS®) requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SZNUP1105LT1G 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, analog, sensor, and connectivity solutions for automotive, industrial, and cloud power applications.
The NUP1105L family-including SZNUP1105LT1G-is engineered specifically for bidirectional ESD and surge protection of automotive serial data buses such as LIN and single-wire CAN, emphasizing compact size, low capacitance, and AEC-Q101 reliability.
FAQ
What is the primary function of the SZNUP1105LT1G in automotive systems?
The SZNUP1105LT1G serves as a bidirectional transient voltage suppressor for LIN and single-wire CAN data lines. It protects transceivers from ESD (±30 kV contact), EFT (40 A), and lightning surges (8 A) by clamping transients to ≤40 V while adding only 60 pF capacitance. Its AEC-Q101 qualification confirms suitability for under-hood automotive deployment.
Does the SZNUP1105LT1G support bidirectional signal protection on a single data line?
Yes. The SZNUP1105LT1G uses a dual-anode, single-cathode Zener configuration (Pins 1 and 2 = anodes, Pin 3 = cathode) to provide symmetrical clamping for both positive and negative transients. This enables true bidirectional protection on one data line-essential for LIN and single-wire CAN protocols where voltage polarity reverses during communication.
What is the maximum clamping voltage of the SZNUP1105LT1G under standard test conditions?
The SZNUP1105LT1G has a maximum clamping voltage of 40 V when subjected to a 5 A peak pulse current (8 × 20 µs waveform), and 44 V at 8 A. These values define the upper voltage limit imposed on protected circuitry during surge events, ensuring downstream transceivers remain within safe operating margins.
Is the SZNUP1105LT1G compatible with automated SMT assembly processes?
Yes. The SZNUP1105LT1G is packaged in SOT-23 (Case 318) with Pb-free finish and rated for lead solder temperature up to 260 °C for 10 seconds. Its 2.90 × 1.30 mm footprint and standardized tape-and-reel packaging (3,000 units per reel) support high-volume reflow soldering and pick-and-place integration.
How does the SZNUP1105LT1G differ from the discontinued NUP1105LT1G?
The SZNUP1105LT1G is the automotive-grade variant of the NUP1105LT1G, distinguished by the "SZ" prefix indicating AEC-Q101 qualification, PPAP capability, and enhanced process controls for automotive applications. Both share identical electrical specs, pinout, and SOT-23 package-but only SZNUP1105LT1G is approved for production automotive use.
SZNUP1105LT1G 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V (Min)
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 44V
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 60pF @ 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)
SZNUP1105LT1G FAQ
1.How can I place an order for SZNUP1105LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNUP1105LT1G 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 SZNUP1105LT1G reliable?
The price and inventory of SZNUP1105LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNUP1105LT1G is usually 5 days.
3.What payment methods are accepted for SZNUP1105LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNUP1105LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNUP1105LT1G?
SZNUP1105LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNUP1105LT1G 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 SZNUP1105LT1G?
For technical support, including SZNUP1105LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNUP1105LT1G requirements.
6.How does Aetrix verify that SZNUP1105LT1G is sourced from the original manufacturer or authorized distributors?
All SZNUP1105LT1G 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 SZNUP1105LT1G meets industry standards.
7.What is the process for return or replacement of SZNUP1105LT1G?
All SZNUP1105LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZNUP1105LT1G, 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 SZNUP1105LT1G part is unused and in its original packaging.
Return procedure for SZNUP1105LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZNUP1105LT1G Tags
-
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
-
D12V0L1B2LP-7B
Diodes Incorporated
-
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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