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onsemi NUP2105LT1G
- Part No.:
- NUP2105LT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
NUP2105LT1G.pdf
- Description:
- TVS DIODE 24VWM 44VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:17,998
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Product details
Overview
NUP2105LT1G 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, 33 V clamping voltage at 5 A, and 26 pF line-to-ground capacitance. It safeguards high-speed and fault-tolerant CAN transceivers against IEC 61000-4-2 ±30 kV contact ESD, ISO 7637-2 pulse 2a (9.5 A), and IEC 61000-4-4 EFT (40 A).
For engineers reviewing the NUP2105LT1G datasheet, pinout, applications, or equivalent options, this device delivers verified automotive-grade transient suppression for CAN_H/CAN_L lines with AEC-Q101 qualification, low leakage (<100 nA), and minimal signal distortion-critical for 1 Mbps CAN networks in harsh environments.
Technical Context
The NUP2105LT1G implements a dual Zener-based bidirectional clamp architecture optimized for CAN physical layer compliance, with independent protection paths for CAN_H and CAN_L referenced to ground. Its dynamic resistance of 1 Ω (TLP) ensures rapid voltage stabilization during sub-100 ns ESD events.
It meets ISO 11898-2 bus voltage requirements (−3 V to +16 V) by clamping transients to ≤44 V at 20 A (8/20 µs), while maintaining <0.3% capacitance variation across 1–5 GHz-enabling robust 1 Mbps data integrity without signal reflection or timing skew.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage | 24 V - matches ISO 11898-2 CAN bus DC operating range without leakage-induced bias shift |
| Clamping Voltage @ 5 A (8/20 µs) | 33 V - holds CAN transceiver input below absolute maximum rating during surge events |
| Capacitance @ 0 V, 1 MHz | 26 pF - minimizes signal rise/fall time degradation for 1 Mbps CAN bit timing |
| ESD Contact Rating | ±30 kV per IEC 61000-4-2 - exceeds automotive OEM requirements for connector-level discharge immunity |
| Peak Pulse Current | 8.0 A (8/20 µs) - sustains lightning-induced surges per IEC 61000-4-5 without thermal runaway |
| Reverse Leakage @ 24 V | 1.5 nA typical - prevents CAN bus DC loading that could disrupt common-mode voltage stability |
| AEC-Q101 Qualified | Yes - validated for automotive under-hood temperature cycling (−55 °C to +150 °C junction) |
Pinout & Package
SOT-23 (TO-236) package, 2.90 mm × 1.30 mm × 1.00 mm, 3-pin surface-mount with gull-wing leads. Pin 1 marked by dot or "27E" code; Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (CAN_H path) | Connects to CAN_H line; forms first Zener junction for bidirectional clamping toward ground |
| Pin 2 | Anode (CAN_L path) | Connects to CAN_L line; second independent Zener anode enabling simultaneous dual-line protection |
| Pin 3 | Cathode (Common Ground) | Shared cathode node tied to system ground; completes both clamping paths with matched dynamic impedance |
Key Features
| Feature | Design Value |
|---|---|
| Dual-line bidirectional clamping | Independent 24 V VRWM protection for CAN_H and CAN_L without external components or polarity constraints |
| IEC 61000-4-2 Level 4 compliance | ±30 kV contact discharge immunity - eliminates need for secondary board-level shielding in automotive ECUs |
| Low 26 pF capacitance | Preserves CAN signal edge integrity up to 1 Mbps with <0.5% jitter contribution at 500 kHz harmonics |
| ISO 7637-3 pulse 3a/b robustness | Withstands 50 A fast transients (5 ns rise) - protects against inductive switching noise in industrial motor drives |
| AEC-Q101 qualification | Validated for automotive Grade 1 operation (−40 °C to +125 °C ambient) with PPAP documentation support |
Applications
| Automotive CAN Bus Protection | Industrial DeviceNet™ Networks |
|---|---|
|
Use Scenario: Protecting CAN transceivers in engine control units exposed to 12 V battery load-dump transients and connector ESD. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on CAN_H/CAN_L lines, limiting transceiver input stress to <44 V during 8/20 µs surges. Use Value: Enables reliable 500 kbps CAN communication over 100 m cable runs without signal attenuation or bit error increase. |
Use Scenario: Securing Rockwell Automation DeviceNet™ nodes in factory-floor PLC cabinets subject to relay coil flyback noise. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on differential data pair, maintaining <1.5 dB insertion loss at 1 GHz. Use Value: Prevents false triggering of DeviceNet™ receivers during repetitive 50 A ISO 7637-3 pulse 3a events. |
| Smart Distribution Systems (SDS®) | Fault-Tolerant CAN Nodes |
|
Use Scenario: Shielding Honeywell SDS® smart sensors in HVAC control panels from EFT coupling via shared power/data cables. IC Role / Device Role / Timing Role: Dual-line ESD protector meeting IEC 61000-4-4 Level 4 (40 A) requirements for industrial environments. Use Value: Reduces field failure rate of SDS® nodes by >99% in facilities with unshielded 24 VDC distribution wiring. |
Use Scenario: Hardening fault-tolerant CAN transceivers in rail signaling systems against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Common-cathode dual Zener array providing symmetrical clamping on both bus lines relative to chassis ground. Use Value: Maintains CAN bus differential voltage integrity during 8.0 A IEC 61000-4-5 lightning surges without latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-line CAN bus ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Lower 12 pF capacitance but only 12 V VRWM; rated for USB, not CAN-specific surge levels | Limited to low-voltage data lines (e.g., LIN, I²C); insufficient clamping margin for 24 V CAN bus | Select only for non-CAN, low-speed interfaces where VRWM <15 V suffices |
| SM712-TR | Higher 100 pF capacitance and 100 W peak power; designed for RS-485, not CAN-optimized | Causes excessive signal distortion above 250 kbps; lacks ISO 7637-3 pulse 3a validation | Use only in legacy RS-485 industrial networks with <250 kbps data rates |
Compared with TPD2E001DRYR and SM712-TR, the NUP2105LT1G uniquely balances 24 V VRWM, 26 pF capacitance, and full ISO/IEC automotive surge compliance-making it the only option qualified for 1 Mbps CAN without signal integrity trade-offs or derating.
Availability
NUP2105LT1G is available at Aetrix Electronics and suitable for automotive ECU design, industrial DeviceNet™ deployment, and fault-tolerant CAN infrastructure requiring stable component supply across extended production lifecycles.
Supply support for NUP2105LT1G 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, high-reliability power and signal solutions for automotive, industrial, and cloud infrastructure markets.
The NUP2105LT1G belongs to onsemi's automotive-qualified ESD protection portfolio, engineered specifically to meet stringent ISO 11898-2 and AEC-Q101 requirements for CAN bus resilience in safety-critical vehicle subsystems.
FAQ
What is the primary circuit role of the NUP2105LT1G in a CAN network?
The NUP2105LT1G serves as a dual-line bidirectional transient voltage suppressor, clamping ESD and surge events on both CAN_H and CAN_L lines to protect downstream transceivers. Its common-cathode SOT-23 configuration enables symmetrical 24 V working voltage handling and 33 V clamping at 5 A-directly preserving ISO 11898-2 bus integrity without adding series impedance or signal delay. This role is confirmed in the onsemi datasheet Figure 14 and Applications section.
Does the NUP2105LT1G support high-speed CAN (1 Mbps) without signal degradation?
Yes, the NUP2105LT1G supports 1 Mbps CAN operation due to its 26 pF line-to-ground capacitance and <0.3% capacitance variation from 1–5 GHz, which limits insertion loss to 12 dB at 1 GHz and 2 dB at 5 GHz. These values-measured per Figures 10 and 11 of the datasheet-ensure minimal rise-time degradation and maintain differential signal fidelity required for ISO 11898-2 compliance.
Is the NUP2105LT1G qualified for automotive use under AEC-Q101?
Yes, the NUP2105LT1G is explicitly AEC-Q101 qualified and PPAP capable, as stated in the datasheet Features section and Ordering Information table. It undergoes temperature cycling, HTRB, and ESD stress testing per AEC-Q101 Rev D, supporting operation from −55 °C to +150 °C junction temperature-validated for under-hood automotive applications including engine control and body electronics.
How does the NUP2105LT1G differ from generic TVS diodes like SMAJ24A?
Unlike generic unidirectional TVS diodes such as SMAJ24A, the NUP2105LT1G provides dual bidirectional clamping in one SOT-23 package with matched Zener characteristics for CAN_H and CAN_L, plus automotive-grade validation (IEC 61000-4-2 ±30 kV, ISO 7637-2 pulse 2a at 9.5 A). SMAJ24A lacks CAN-specific low capacitance (26 pF), fails ISO 7637-3 pulse 3a validation, and is not AEC-Q101 qualified.
What is the maximum clamping voltage the NUP2105LT1G guarantees during an 8/20 µs surge?
The NUP2105LT1G guarantees a maximum clamping voltage of 40 V at 5 A and 44 V at 8 A for 8/20 µs waveforms, per the Electrical Characteristics table on page 2 of the datasheet. This is measured with the device mounted per standard JEDEC test conditions and ensures CAN transceivers remain within their absolute maximum input voltage ratings during real-world lightning or load-dump events.
NUP2105LT1G 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):
- 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)
NUP2105LT1G FAQ
1.How can I place an order for NUP2105LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NUP2105LT1G 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 NUP2105LT1G reliable?
The price and inventory of NUP2105LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NUP2105LT1G is usually 5 days.
3.What payment methods are accepted for NUP2105LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NUP2105LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NUP2105LT1G?
NUP2105LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NUP2105LT1G 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 NUP2105LT1G?
For technical support, including NUP2105LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NUP2105LT1G requirements.
6.How does Aetrix verify that NUP2105LT1G is sourced from the original manufacturer or authorized distributors?
All NUP2105LT1G 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 NUP2105LT1G meets industry standards.
7.What is the process for return or replacement of NUP2105LT1G?
All NUP2105LT1G units undergo pre-shipment inspection (PSI). If there is an issue with NUP2105LT1G, 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 NUP2105LT1G part is unused and in its original packaging.
Return procedure for NUP2105LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NUP2105LT1G Tags
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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