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onsemi NUP1105LT1G
- Part No.:
- NUP1105LT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
NUP1105LT1G.pdf
- Description:
- TVS DIODE 24VWM 44VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,681
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Product details
Overview
NUP1105LT1G from onsemi is a bidirectional ESD protection diode in SOT-23 package, designed specifically for LIN and single-line CAN bus transceivers. It delivers 350 W peak power dissipation (8 × 20 µs), clamps at 40 V @ 5 A, and exhibits ≤100 nA reverse leakage at 24 V - enabling robust transient suppression in automotive network interfaces.
For engineers reviewing the NUP1105LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include IEC 61000-4-2 Level 4 ESD rating (±30 kV contact), ISO 7637-1/3 surge compatibility, low 60 pF anode-to-ground capacitance, and AEC-Q101 qualification for automotive deployment.
Technical Context
The NUP1105LT1G implements dual-anode, single-cathode Zener-based bidirectional clamping to protect one data line against both polarities of ESD and EFT transients. Its architecture targets low clamping voltage (40 V @ 5 A) while maintaining <100 nA leakage at VRWM = 24 V - critical for preserving signal integrity on LIN/CAN lines.
It meets IEC 61000-4-2 (±30 kV contact), IEC 61000-4-4 (40 A EFT), and IEC 61000-4-5 (8.0 A lightning surge), with thermal operation from −55 °C to +150 °C and UL 94 V-0 flammability rating - confirming suitability for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24 V - maximum continuous reverse operating voltage; ensures no conduction during normal LIN/CAN bus operation (typically 12 V nominal). |
| VBR (min) | 25.7 V - breakdown initiates above VRWM, providing margin before clamping activates. |
| VC @ 5 A | 40 V - clamping voltage limits transient overvoltage seen by downstream transceiver, protecting internal circuitry. |
| IPP (max) | 8.0 A - peak pulse current handling per 8 × 20 µs waveform, supporting IEC 61000-4-5 Level 2 (8 A) compliance. |
| CJ (Anode–GND) | 60 pF - low capacitance minimizes signal distortion on high-speed LIN (20.2 kbps) and single-wire CAN buses. |
| Leakage @ 24 V | ≤100 nA - negligible DC loading on bus, preserving voltage thresholds and reducing power loss. |
| Package | SOT-23 (Case 318) - surface-mount footprint compatible with automated assembly and space-constrained automotive ECUs. |
Pinout & Package
SOT-23 package (2.90 × 1.30 × 1.00 mm, lead pitch 1.90 mm), Pb-free, RoHS compliant, marked "27H" with date code. Style 27 per onsemi mechanical drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | First bidirectional clamping path; connects to protected data line (e.g., LIN Bus). |
| Pin 2 | Anode | Second anode tied internally to Pin 1 - enables symmetrical bidirectional clamping across one line. |
| Pin 3 | Cathode | Common reference node; connected to system ground to complete transient current path during ESD/EFT events. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Zener clamping | Single-device protection for both positive and negative transients on one data line - eliminates need for dual-diode discrete solutions. |
| 350 W peak power rating | Withstands high-energy 8 × 20 µs surges per IEC 61000-4-5 without degradation - supports long-term reliability in harsh automotive environments. |
| AEC-Q101 qualified | Validated for automotive-grade temperature cycling, humidity, and mechanical stress - required for engine control, body electronics, and ADAS modules. |
| Low 60 pF capacitance | Preserves signal rise/fall times on LIN (20.2 kbps) and single-wire CAN, avoiding bit errors or timing violations. |
| UL 94 V-0 flammability | Self-extinguishing polymer housing prevents fire propagation in enclosed ECU enclosures - meets OEM safety mandates. |
Applications
| LIN Bus Protection | Single-Line CAN Protection |
|---|---|
Use Scenario: Protecting LIN communication between body control module (BCM) and door lock actuator in 12 V automotive systems. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between LIN transceiver output and bus wiring harness. Use Value: Clamps ESD events up to ±30 kV (IEC 61000-4-2) and EFT bursts to <40 V, preventing transceiver latch-up or permanent damage. | Use Scenario: Surge protection for fault-tolerant single-wire CAN in electric power steering (EPS) subsystems. IC Role / Device Role / Timing Role: Line-level EMI filter and transient clamp integrated at CAN transceiver I/O pin. Use Value: Maintains signal integrity under ISO 7637-3 repetitive EFT (40 A, 5/50 ns) while adding only 60 pF loading to the bus. |
| Smart Distribution Systems (SDS®) | DeviceNet™ Industrial Networks |
Use Scenario: Protecting SDS® nodes in HVAC control networks within commercial vehicles. IC Role / Device Role / Timing Role: Primary ESD barrier on SDS® data line interfacing with microcontroller GPIO. Use Value: Enables reliable operation at −40 °C to +125 °C ambient with <100 nA leakage, minimizing standby current drain. | Use Scenario: Transient suppression on DeviceNet™ trunk line terminations in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-entry protection device mounted directly at connector interface. Use Value: Withstands 8.0 A lightning surges (IEC 61000-4-5) and dissipates 350 W peak energy without derating over 150 °C junction temperature. |
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), rated for USB/low-voltage I/O - not suitable for 24 V LIN/CAN. | Targeted at consumer port protection; lacks IEC 61000-4-5 and ISO 7637 compliance. | Select only for sub-5 V digital interfaces; incompatible with automotive bus voltage levels. |
| SMF15A | Unidirectional, 15 V VRWM, 400 W rating, TO-236AB package - requires external bias for bidirectional use. | Designed for DC power rail protection; no native bidirectional configuration for data lines. | Use only where polarity is fixed and board space allows discrete resistor+diode implementation. |
Compared with ESD5Z3.3T5G and SMF15A, the NUP1105LT1G uniquely combines 24 V VRWM, true bidirectional SOT-23 integration, IEC/ISO automotive compliance, and 60 pF capacitance - making it the only drop-in solution for LIN and single-line CAN data line protection without redesign.
Availability
NUP1105LT1G is available at Aetrix Electronics and suitable for automotive electronics, industrial control networks, smart distribution systems (SDS®), and DeviceNet™ applications requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for NUP1105LT1G 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 electronics, serving automotive, industrial, cloud, and IoT markets with silicon and packaging innovations.
The NUP1105LT1G belongs to onsemi's automotive-qualified ESD protection portfolio, engineered specifically to meet stringent EMC, reliability, and safety requirements of LIN, CAN, and industrial fieldbus interfaces.
FAQ
What is the primary function of the NUP1105LT1G in automotive networks?
The NUP1105LT1G functions as a bidirectional transient voltage suppressor for LIN and single-line CAN data lines. It protects transceivers from ESD (±30 kV contact), EFT (40 A), and lightning surges (8 A) by clamping transients to ≤44 V while adding only 60 pF capacitance - ensuring signal fidelity and system reliability in automotive ECUs.
Is the NUP1105LT1G pin-compatible with other SOT-23 ESD diodes?
No - the NUP1105LT1G uses Style 23 pinout (Pins 1 & 2 = Anode, Pin 3 = Cathode), which differs from standard unidirectional SOT-23 diodes. Substituting non-bidirectional parts like SMBJ5.0A would require PCB redesign due to different terminal roles and clamping behavior. Always verify pin mapping using onsemi's CASE 318 mechanical drawing.
Does the NUP1105LT1G meet AEC-Q101 requirements for automotive use?
Yes - the NUP1105LT1G is explicitly AEC-Q101 qualified and PPAP capable, with full test reports covering temperature cycling, HAST, ESD, and mechanical shock. The SZ-prefix variant (SZNUP1105LT1G) adds additional automotive process controls, but both variants satisfy AEC-Q101 for under-hood and cabin applications.
What is the maximum operating temperature range for the NUP1105LT1G?
The NUP1105LT1G operates from −55 °C to +150 °C junction temperature, validated per AEC-Q101. This range supports placement near power stages or in engine compartments where ambient temperatures exceed 125 °C - provided PCB thermal design maintains TJ ≤ 150 °C under worst-case surge conditions.
How does the NUP1105LT1G compare to TVS diodes with higher peak power ratings?
While some TVS diodes offer >500 W peak power, the NUP1105LT1G's 350 W rating is optimized for automotive bus waveforms (IEC 61000-4-5 8/20 µs). Its lower clamping voltage (40 V @ 5 A) and 60 pF capacitance provide superior system-level protection for LIN/CAN without compromising signal integrity - unlike higher-power devices that often trade capacitance or response time.
NUP1105LT1G 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:
- CAN
- Capacitance @ Frequency:
- 60pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
NUP1105LT1G FAQ
1.How can I place an order for NUP1105LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NUP1105LT1G 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 NUP1105LT1G reliable?
The price and inventory of NUP1105LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NUP1105LT1G is usually 5 days.
3.What payment methods are accepted for NUP1105LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NUP1105LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NUP1105LT1G?
NUP1105LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NUP1105LT1G 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 NUP1105LT1G?
For technical support, including NUP1105LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NUP1105LT1G requirements.
6.How does Aetrix verify that NUP1105LT1G is sourced from the original manufacturer or authorized distributors?
All NUP1105LT1G 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 NUP1105LT1G meets industry standards.
7.What is the process for return or replacement of NUP1105LT1G?
All NUP1105LT1G units undergo pre-shipment inspection (PSI). If there is an issue with NUP1105LT1G, 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 NUP1105LT1G part is unused and in its original packaging.
Return procedure for NUP1105LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NUP1105LT1G Tags
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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
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D12V0L1B2LP-7B
Diodes Incorporated
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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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