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onsemi NUP3105LT1G
- Part No.:
- NUP3105LT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
NUP3105LT1G.pdf
- Description:
- TVS DIODE 32VWM 66VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,556
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Product details
Overview
NUP3105LT1G from onsemi is a dual-line bidirectional ESD protection diode in SOT-23 package, designed specifically for CAN bus transceiver protection in 24 V automotive and industrial systems. It delivers 350 W peak power dissipation per line (8/20 µs), clamps at ≤59 V @ 5 A, and exhibits ≤30 pF line-to-ground capacitance to preserve high-speed CAN signal integrity.
For engineers reviewing the NUP3105LT1G datasheet, pinout, applications, or equivalent options, this device serves as a compact, AEC-Q101-qualified solution for transient suppression in CAN_H/CAN_L lines-critical for fault-tolerant CAN, truck networks, and Smart Distribution Systems requiring IEC 61000-4-2 Level 4 ESD immunity.
Technical Context
The NUP3105LT1G integrates two identical bidirectional Zener-based surge protection elements in a single SOT-23 package, enabling simultaneous protection of CAN_H and CAN_L against ESD, EFT, and lightning surges. Its breakdown voltage is 35.6 V (min), reverse working voltage is 32 V, and clamping voltage remains ≤66 V at 8 A peak pulse current.
It meets IEC 61000-4-2 (±30 kV contact), IEC 61000-4-4 (50 A EFT), and IEC 61000-4-5 (8.0 A lightning) standards while maintaining low leakage (<100 nA at 32 V) and UL 94 V-0 flammability rating-key for under-hood and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power Dissipation | 350 W per line (8/20 µs waveform); sustains high-energy transients without failure in CAN bus nodes. |
| Clamping Voltage | ≤59 V @ 5 A; limits voltage seen by CAN transceiver during ESD event to safe operating range. |
| Breakdown Voltage | 35.6 V min @ 1 mA; ensures reliable conduction above system operating voltage while avoiding false triggering. |
| Line-to-GND Capacitance | 30 pF max @ 0 V, 1 MHz; preserves signal rise/fall times for high-speed CAN (up to 1 Mbps) and fault-tolerant CAN. |
| Reverse Leakage Current | <100 nA @ 32 V; minimizes standby power loss and avoids interference with bus biasing networks. |
| ESD Rating | IEC 61000-4-2 Level 4 (±30 kV contact); certified for robust electrostatic discharge immunity in automotive assembly and field use. |
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock-required for CAN nodes in trucks and chassis modules. |
Pinout & Package
SOT-23 (TO-236) package, 2.90 mm × 1.30 mm × 1.00 mm, Pb-free, RoHS compliant. Marking code "27F" with date code; pin 1 = cathode, pin 2 = cathode, pin 3 = cathode (Style 27 - dual-cathode configuration for bidirectional protection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (CAN_H side) | Connected to CAN_H line; forms one half of bidirectional clamp with internal Zener structure. |
| Pin 2 | Cathode (CAN_L side) | Connected to CAN_L line; symmetric counterpart to Pin 1 for differential protection. |
| Pin 3 | Common Cathode Reference | Internally tied to both Zener junctions; connects to system ground to complete clamping path for both lines. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-line bidirectional protection | Single SOT-23 package protects both CAN_H and CAN_L simultaneously-reduces PCB area vs discrete diodes. |
| Low 30 pF capacitance | Maintains signal integrity for high-speed CAN (≥1 Mbps) and fault-tolerant CAN without edge distortion or timing skew. |
| 350 W peak power handling | Withstands repeated 8/20 µs surges up to 8 A, meeting IEC 61000-4-5 lightning requirements for industrial gateways. |
| AEC-Q101 qualification | Validated for automotive under-hood operation across −55 °C to +150 °C junction temperature range. |
| UL 94 V-0 flammability | Ensures flame resistance in enclosed control modules where thermal runaway risk exists during overvoltage events. |
Applications
| Industrial Control Networks | Automotive Low-Speed CAN |
|---|---|
Use Scenario: Protection of DeviceNet™ and Smart Distribution Systems (SDS™) nodes in factory automation cabinets exposed to EFT from nearby motor drives. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between CAN transceiver and bus connector. Use Value: Prevents latch-up or damage to transceivers during 50 A EFT bursts while adding <30 pF loading to maintain 500 kbps timing margins. |
Use Scenario: ESD protection for body control modules (BCM) in passenger vehicles using low-speed (125 kbps) CAN for door locks and lighting. IC Role / Device Role / Timing Role: Dual-line ESD clamp integrated into CAN front-end filter network before transceiver input pins. Use Value: Achieves ±30 kV contact ESD immunity per IEC 61000-4-2 Level 4 without degrading bus DC bias or common-mode rejection. |
| Truck & Heavy-Duty CAN | Fault-Tolerant CAN Networks |
Use Scenario: Surge protection for J1939-compliant engine control units mounted near diesel injectors and alternators in Class 8 trucks. IC Role / Device Role / Timing Role: Primary transient suppressor on CAN_H/CAN_L lines upstream of isolated transceiver. Use Value: Clamps 8 A lightning surges (IEC 61000-4-5) to ≤66 V, preventing transceiver overvoltage failure in harsh 24 V vehicle electrical systems. |
Use Scenario: High-reliability CAN nodes in rail signaling or mining equipment requiring fault tolerance during cable faults or short circuits. IC Role / Device Role / Timing Role: Symmetric bidirectional clamp ensuring equal protection on both differential lines during wire-break or short-to-battery events. Use Value: Maintains differential mode integrity under transient stress while preserving >10 kΩ common-mode impedance for fault detection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Lower clamping voltage (≤12 V @ 1 A), but rated only for 100 W peak power and 12 V systems; not qualified to AEC-Q101. | Targeted at USB/low-voltage data lines-not validated for 24 V CAN bus or IEC 61000-4-5 lightning surges. | Select only for non-automotive, low-voltage interfaces where 32 V VRWM and 350 W rating are unnecessary. |
| SM712-TP | Higher VRWM (12 V), asymmetric unidirectional design; requires external series resistors for CAN differential protection; no AEC-Q101 qualification. | Designed for RS-485/RS-232, not optimized for CAN's bidirectional signaling or low-capacitance requirements. | Use only if redesigning layout to accommodate discrete resistor-diode networks and sacrificing CAN signal bandwidth. |
Compared with TPD2E001DRYR and SM712-TP, the NUP3105LT1G uniquely combines AEC-Q101 qualification, 32 V VRWM, 350 W surge capability, and 30 pF capacitance in a single SOT-23 footprint-making it the only drop-in solution for automotive and industrial CAN bus protection without layout or bill-of-material changes.
Availability
NUP3105LT1G is available at Aetrix Electronics and suitable for automotive electronic control units, industrial CAN gateways, and heavy-duty truck communication modules requiring stable component supply and long-term lifecycle support.
Supply support for NUP3105LT1G 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 NUP3105LT1G belongs to onsemi's transient voltage suppression portfolio, engineered specifically for CAN bus protection in 24 V systems-balancing high surge robustness, low capacitance, and automotive qualification.
FAQ
What is the primary function of the NUP3105LT1G in a CAN bus system?
The NUP3105LT1G functions as a dual-line bidirectional ESD and transient voltage suppressor for CAN_H and CAN_L signals. It clamps harmful voltage spikes-such as those from ESD, EFT, or lightning-to safe levels (≤66 V) while adding minimal capacitance (≤30 pF), thereby protecting downstream CAN transceivers without compromising signal integrity in 24 V automotive and industrial networks.
Does the NUP3105LT1G meet automotive qualification standards?
Yes, the NUP3105LT1G is AEC-Q101 qualified and PPAP capable, with validation across temperature cycling, high-temperature reverse bias, and mechanical shock tests. Its SZNUP3105LT1G* variant explicitly supports automotive production requirements, and the device operates reliably from −55 °C to +150 °C junction temperature-meeting under-hood and chassis module specifications.
How does the NUP3105LT1G differ from standard Zener diodes used for ESD protection?
Unlike general-purpose Zener diodes, the NUP3105LT1G features a junction optimized for high peak energy absorption (350 W, 8/20 µs), low leakage (<100 nA), and precise clamping behavior (35.6 V breakdown). Its dual-cathode SOT-23 configuration enables true bidirectional protection for differential CAN lines-whereas standard Zeners require external pairing and lack IEC 61000-4-2 Level 4 certification.
Can the NUP3105LT1G be used in both high-speed and fault-tolerant CAN networks?
Yes, the NUP3105LT1G is explicitly validated for both high-speed CAN (up to 1 Mbps) and fault-tolerant CAN due to its 30 pF capacitance, symmetrical bidirectional response, and ability to clamp transients without disrupting common-mode voltage windows. Its design ensures compatibility with ISO 11898-2 and ISO 11898-3 physical layer requirements.
What is the significance of the "T1G" suffix in NUP3105LT1G?
The "T1G" suffix indicates tape-and-reel packaging: 3,000 units per reel, Pb-free (RoHS compliant), and compatible with automated SMT placement. This format ensures consistent feeding in high-volume manufacturing and aligns with onsemi's standard shipping configuration for SOT-23 devices like the NUP3105LT1G.
NUP3105LT1G 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:
- 2
- Voltage - Reverse Standoff (Typ):
- 32V (Max)
- Voltage - Breakdown (Min):
- 35.6V
- Voltage - Clamping (Max) @ Ipp:
- 66V
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- CAN
- Capacitance @ Frequency:
- 30pF @ 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)
NUP3105LT1G FAQ
1.How can I place an order for NUP3105LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NUP3105LT1G 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 NUP3105LT1G reliable?
The price and inventory of NUP3105LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NUP3105LT1G is usually 5 days.
3.What payment methods are accepted for NUP3105LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NUP3105LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NUP3105LT1G?
NUP3105LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NUP3105LT1G 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 NUP3105LT1G?
For technical support, including NUP3105LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NUP3105LT1G requirements.
6.How does Aetrix verify that NUP3105LT1G is sourced from the original manufacturer or authorized distributors?
All NUP3105LT1G 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 NUP3105LT1G meets industry standards.
7.What is the process for return or replacement of NUP3105LT1G?
All NUP3105LT1G units undergo pre-shipment inspection (PSI). If there is an issue with NUP3105LT1G, 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 NUP3105LT1G part is unused and in its original packaging.
Return procedure for NUP3105LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NUP3105LT1G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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