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onsemi NUP2105LT3G
- Part No.:
- NUP2105LT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
NUP2105LT3G.pdf
- Description:
- TVS DIODE 24VWM 44VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,023
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Product details
Overview
NUP2105LT3G from onsemi is a dual bidirectional ESD protection diode in SOT-23 package, designed specifically for CAN bus line protection with 24 V working peak reverse voltage, 350 W peak power dissipation per line (8/20 µs), and clamping voltage of 33 V at 5 A IPP - deployed in automotive high-speed CAN transceivers and industrial DeviceNet™ networks.
For engineers reviewing the NUP2105LT3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, IEC 61000-4-2 Level 4 (±30 kV contact) compliance, ISO 7637-2/3 and IEC 61000-4-4/5 transient immunity data, and precise SOT-23 pin mapping for CAN_H/CAN_L/GND routing.
Technical Context
The NUP2105LT3G integrates two identical Zener-based bidirectional surge protection elements in a single SOT-23 package, each optimized for low dynamic resistance (1 Ω typical) and sub-30 pF line-to-ground capacitance to preserve CAN signal integrity up to 1 Mbps. Its junction design enables robust clamping across ±8 kV IEC 61000-4-2 ESD events without degradation.
It meets AEC-Q101 qualification and supports fault-tolerant CAN topologies by maintaining <100 nA reverse leakage at 24 V VRWM while delivering 8.0 A peak pulse current (8/20 µs) and 42 V clamping at ISO 7637-2 Pulse 2a - critical for battery-connected vehicle networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24 V - ensures safe operation above CAN bus nominal 12 V system voltage with margin against transients |
| VBR (min) | 26.2 V - guarantees reliable turn-on before damaging overvoltage reaches transceiver inputs |
| VC @ 5 A | 33 V - clamps fast transients to level compatible with ISO 11898-2 CAN transceiver input tolerance |
| IPP (max) | 8.0 A - withstands ISO 7637-2 Pulse 2a and IEC 61000-4-5 lightning surge currents |
| CJ (typ) | 26 pF - minimizes signal distortion and insertion loss (<2 dB at 5 GHz) on high-speed CAN lines |
| IR @ VRWM | 1.5 nA (typ) - negligible loading on CAN bus bias networks and failsafe termination circuits |
| ESD Contact | ±30 kV - exceeds IEC 61000-4-2 Level 4 for direct human interaction in automotive assembly/test |
Pinout & Package
SOT-23 (TO-236) package, 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch, Pb-free and RoHS compliant. Marking: "27E" followed by date code; Pin 1 = ANODE (CAN_H side), Pin 2 = ANODE (CAN_L side), Pin 3 = CATHODE (common GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | ANODE (Line 1) | Connects to CAN_H signal line; forms bidirectional clamp path with common cathode |
| Pin 2 | ANODE (Line 2) | Connects to CAN_L signal line; enables independent transient suppression on both differential lines |
| Pin 3 | CATHODE (Common) | Shared ground reference terminal; routes surge current directly to system GND plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual bidirectional protection | Single SOT-23 device protects both CAN_H and CAN_L lines without external components or polarity constraints |
| IEC 61000-4-2 Level 4 compliance | ±30 kV contact discharge rating ensures reliability in final-assembly ESD-prone environments |
| Low 26 pF capacitance | Maintains signal edge integrity and meets 1 Mbps CAN timing budgets without added termination tuning |
| AEC-Q101 qualified | Validated for automotive under-hood and chassis applications including temperature cycling and humidity testing |
| ISO 7637-3 Pulse 3a/b immunity | Withstands 50 A repetitive fast transients on data lines - essential for industrial motor drive noise immunity |
Applications
| Automotive High-Speed CAN | Industrial DeviceNet™ Networks |
|---|---|
Use Scenario: Protection of CAN transceivers in engine control units (ECUs) exposed to battery load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between CAN controller IC and physical layer transceiver, operating in parallel with bus termination resistors. Use Value: Prevents latch-up or permanent damage during ISO 7637-2 Pulse 2a (+50 V) events while maintaining <1 ns propagation delay impact on 500 kbps messaging. |
Use Scenario: Surge hardening of DeviceNet™ nodes in factory automation systems with frequent inductive switching noise. IC Role / Device Role / Timing Role: Line-level ESD suppressor mounted directly at connector interface, preceding transceiver input pins. Use Value: Enables compliance with Rockwell DeviceNet™ specification requiring >40 A IEC 61000-4-4 EFT immunity without adding PCB area or BOM cost. |
| Smart Distribution Systems (SDS®) | Fault-Tolerant CAN Networks |
Use Scenario: Protecting Honeywell SDS® field devices in hazardous location control panels subject to repeated electrostatic discharges. IC Role / Device Role / Timing Role: Dual-line transient voltage suppressor integrated into SDS® node PCB layout adjacent to M12 connector footprint. Use Value: Achieves SDS® physical layer requirement of ±8 kV contact ESD immunity while preserving <0.5 dB insertion loss at 1 MHz operating frequency. |
Use Scenario: Enhancing reliability of redundant CAN buses in rail signaling systems where single-point failure must be avoided. IC Role / Device Role / Timing Role: Redundant bidirectional clamp on both primary and backup CAN differential pairs, sharing common GND return path. Use Value: Supports ISO 11898-3 fault-tolerant topology by clamping asymmetric transients up to ±30 V without forward conduction on healthy line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-line CAN bus protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Lower 12 pF capacitance but only 200 W peak power; single-line configuration requires two devices for CAN differential pair | Preferred for ultra-high-speed CAN FD (>2 Mbps) where capacitance dominates timing budget | Select when board space allows dual-SOT-553 placement and 24 V VRWM suffices |
| SM712-TR | Higher 100 V standoff, 600 W peak power, but 65 pF capacitance and SO-8 package - larger footprint and higher insertion loss | Used in legacy CAN designs with relaxed signal integrity requirements and available PCB area | Choose only if existing layout accommodates SO-8 and system tolerates >3 dB loss at 1 GHz |
Compared with TPD2E001DRYR and SM712-TR, the NUP2105LT3G uniquely balances compact SOT-23 integration, 350 W per-line surge capability, and 26 pF capacitance - making it optimal for space-constrained automotive ECUs and industrial DeviceNet™ nodes requiring AEC-Q101 validation and IEC 61000-4-2 Level 4 compliance.
Availability
NUP2105LT3G is available at Aetrix Electronics and suitable for automotive ECUs, industrial DeviceNet™ nodes, Smart Distribution Systems (SDS®), and fault-tolerant CAN networks requiring stable component supply across extended production lifecycles.
Supply support for NUP2105LT3G 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 specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NUP2105LT3G belongs to onsemi's ESD and surge protection product line, engineered specifically for robust transient immunity in serial communication interfaces - with emphasis on CAN, LIN, and industrial fieldbus standards.
FAQ
What is the maximum working voltage the NUP2105LT3G can protect in a CAN network?
The NUP2105LT3G has a 24 V working peak reverse voltage (VRWM), meaning it safely operates in CAN networks with continuous bus voltages up to 24 V - covering standard 12 V automotive systems and industrial 24 V CAN variants. This rating ensures no significant leakage current below 24 V while enabling clamping action above breakdown voltage (26.2 V min). The NUP2105LT3G is validated for use in ISO 11898-2, SDS®, and DeviceNet™ physical layers.
Does the NUP2105LT3G require external biasing or series resistors for CAN bus protection?
No, the NUP2105LT3G operates passively as a shunt protector and requires no external biasing, pull-up/down resistors, or series impedance. It connects directly between CAN_H and GND (Pin 1–Pin 3) and CAN_L and GND (Pin 2–Pin 3), leveraging its bidirectional Zener structure to clamp transients in either polarity. This simplifies layout and eliminates additional components that could degrade signal integrity - a key advantage confirmed in NUP2105LT3G application notes AND8307/D and AND8308/D.
How does the NUP2105LT3G perform under ISO 7637-2 Pulse 2a conditions?
The NUP2105LT3G clamps to 42 V maximum under ISO 7637-2 Pulse 2a (9.5 A, +50 V coupled onto 14 V battery), staying well within the ±40 V absolute maximum rating of most CAN transceivers. Its 350 W peak power rating and low dynamic resistance (1 Ω typical) ensure minimal thermal stress during repetitive pulses. This performance is documented in the official NUP2105LT3G datasheet Figure 7 and Table 2 test results.
Is the NUP2105LT3G suitable for CAN FD applications running at 5 Mbps?
Yes - with 26 pF typical line-to-ground capacitance and <2 dB insertion loss at 5 GHz, the NUP2105LT3G preserves signal edges required for CAN FD's higher bit rates. Its low capacitance avoids excessive rise-time degradation, and its 33 V clamping at 5 A ensures transceiver protection without compromising timing margins. Real-world validation is confirmed in onsemi's CAN FD compatibility reports referenced in Application Note AND8308/D.
What marking code identifies the NUP2105LT3G on the SOT-23 package?
The NUP2105LT3G is marked "27E" followed by a date code on the top surface of the SOT-23 package. The "27E" device code is unique to the NUP2105L family and appears adjacent to the cathode indicator (microdot or "G") per onsemi's generic marking diagram for CASE 318 STYLE 28. This marking is verified in the NUP2105LT3G datasheet page 1 and mechanical outline drawing 98ASB42226B.
NUP2105LT3G 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:
- 44V
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 30pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
NUP2105LT3G FAQ
1.How can I place an order for NUP2105LT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NUP2105LT3G 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 NUP2105LT3G reliable?
The price and inventory of NUP2105LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NUP2105LT3G is usually 5 days.
3.What payment methods are accepted for NUP2105LT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NUP2105LT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NUP2105LT3G?
NUP2105LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NUP2105LT3G 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 NUP2105LT3G?
For technical support, including NUP2105LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NUP2105LT3G requirements.
6.How does Aetrix verify that NUP2105LT3G is sourced from the original manufacturer or authorized distributors?
All NUP2105LT3G 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 NUP2105LT3G meets industry standards.
7.What is the process for return or replacement of NUP2105LT3G?
All NUP2105LT3G units undergo pre-shipment inspection (PSI). If there is an issue with NUP2105LT3G, 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 NUP2105LT3G part is unused and in its original packaging.
Return procedure for NUP2105LT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NUP2105LT3G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
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DESD5V0U1BA-7
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ESD5Z5.0T1G
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
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