My Inquiry
My Account
onsemi NUP1301ML3T1
- Part No.:
- NUP1301ML3T1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
NUP1301ML3T1.pdf
- Description:
- ESD PROTECTION LOW CAPACITANCE R
- Quantity:
- Payment:
- Shipping:
Inventory:4,970
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NUP1301ML3T1 from onsemi is a low-capacitance ESD protection diode array designed for single-data-line transient suppression in high-speed interfaces; it delivers 0.9 pF max capacitance, 70 V reverse voltage rating, and IEC 61000-4-2 Level 4 (8 kV contact / 15 kV air) compliance, deployed in T1/E1 secondary IC protection and I²C bus safeguarding.
For engineers reviewing the NUP1301ML3T1 datasheet, pinout, applications, or equivalent options, key selection criteria include rail-to-rail clamping capability, SOT-23 package compatibility, sub-1 pF signal-line loading, and AEC-Q101 qualification for automotive secondary interface protection.
Technical Context
The NUP1301ML3T1 integrates two back-to-back diodes in a single SOT-23 package with pin 1 as anode and pins 2 & 3 as cathodes, enabling bidirectional clamping between data line and ground or supply rails. Its architecture supports fast transient diversion without signal integrity degradation in <100 Mbps digital lines.
It operates within −65°C to +150°C junction temperature range, features 625°C/W thermal resistance (Junction-to-Ambient), and maintains leakage current ≤2.5 µA at 70 Vdc and 25°C - critical for low-power microcontroller input protection where standby current budget is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Capacitance | 0.9 pF max at 1 MHz, VR = 0 V - preserves signal rise/fall times in high-speed I²C and video lines. |
| ESD Rating | IEC 61000-4-2 Level 4: 8 kV contact / 15 kV air - meets industrial and automotive system-level ESD immunity requirements. |
| Reverse Voltage | 70 Vdc - supports protection of 3.3 V, 5 V, and 12 V data lines without forward conduction during normal operation. |
| Forward Current | 215 mAdc continuous - sustains surge energy dissipation without thermal runaway during repetitive transients. |
| Junction Temp | −65°C to +150°C - enables deployment in under-hood automotive modules and industrial base station environments. |
| Package | SOT-23 (Case 318, Style 11) - surface-mount compatible with standard pick-and-place and reflow processes. |
Pinout & Package
SOT-23 package (2.90 × 1.30 × 1.00 mm, 1.90 mm pitch), 3-terminal configuration per device marking diagram and Style 11 mechanical outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connects to protected data line; forms forward path to ground or VCC when transient exceeds VF + reference. |
| Pin 2 | Cathode | Common cathode node tied to ground or negative rail for unidirectional or rail-to-rail clamping configuration. |
| Pin 3 | Cathode–Anode | Shared terminal supporting dual-diode topology: functions as cathode for Pin 1 and anode for internal second diode in back-to-back arrangement. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail clamping | Enables bidirectional ESD current steering to either VCC or GND without external bias, reducing component count in I²C and HDSL protection circuits. |
| AEC-Q101 qualified | Validated for automotive applications including infotainment and body control modules requiring PPAP documentation and site-specific process controls. |
| Pb-free packaging | RoHS-compliant SOT-23 with "G" suffix and microdot marking - supports lead-free assembly and global environmental compliance mandates. |
| Low leakage | ≤2.5 µA IR at 70 Vdc/25°C - prevents DC loading on high-impedance microcontroller inputs and preserves battery life in portable systems. |
Applications
| T1/E1 Secondary IC Protection | I²C Bus Protection |
|---|---|
Use Scenario: Protecting line drivers and receivers in telecom infrastructure against ESD events during hot-plug or field maintenance. IC Role / Device Role / Timing Role: Transient voltage suppressor placed directly at connector interface before signal conditioning ICs. Use Value: 0.9 pF capacitance avoids signal distortion on 2.048 Mbps T1 lines while meeting Telcordia GR-1089-CORE immunity requirements. |
Use Scenario: Safeguarding bidirectional SDA/SCL lines in embedded systems connecting sensors, EEPROMs, and PMICs. IC Role / Device Role / Timing Role: Low-loading ESD clamp integrated adjacent to MCU I/O pins to prevent latch-up during handling or system integration. Use Value: Sub-1 pF loading ensures timing margins remain intact across 400 kHz Fast-mode Plus I²C operation with 20 mA drive capability. |
| Video Line Protection | Microcontroller Input Protection |
Use Scenario: Shielding analog RGB or digital LVDS video traces in automotive displays and industrial HMIs from ESD coupling. IC Role / Device Role / Timing Role: Point-of-entry protection element on differential or single-ended video signal paths prior to receiver ICs. Use Value: 70 V reverse rating accommodates common-mode swings in 75 Ω coaxial video interfaces without leakage-induced offset drift. |
Use Scenario: Hardening GPIO, reset, and interrupt inputs of automotive-grade MCUs against user-touch and board-level discharge events. IC Role / Device Role / Timing Role: Frontline ESD guard for high-impedance CMOS inputs operating at 1.8 V to 5 V logic levels. Use Value: ≤2.5 µA leakage at rated VR ensures no measurable impact on wake-up current or brown-out detection thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD9X5.0ST5G | 0.7 pF typ capacitance; 5.0 V working voltage; lower clamping voltage (12 V) but reduced VR (12 V vs. 70 V). | Better suited for 3.3 V/5 V logic rails only; not rated for 12 V or telecom line protection. | Select when protecting low-voltage digital buses where tighter clamping and ultra-low capacitance outweigh voltage range needs. |
| TPD2E001DRYR | 0.8 pF typ; dual-channel; integrated 10 kΩ series resistors; no AEC-Q101 qualification. | Targets USB D+/D− or HDMI CEC lines; resistor-integrated design simplifies layout but limits flexibility in rail selection. | Prefer for consumer electronics with space-constrained layouts and no automotive qualification requirement. |
Compared with ESD9X5.0ST5G and TPD2E001DRYR, the NUP1301ML3T1 provides broader voltage coverage (70 V), automotive qualification, and flexible rail-to-rail clamping - making it optimal for telecom, industrial, and automotive secondary interface protection where robustness and wide operating margin are mandatory.
Availability
NUP1301ML3T1 is available at Aetrix Electronics and suitable for T1/E1 secondary IC protection, I²C bus safeguarding, and automotive microcontroller input protection requiring stable component supply across production lifecycles.
Supply support for NUP1301ML3T1 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The NUP1301ML3T1 belongs to onsemi's MicroIntegration ESD protection portfolio, engineered specifically for high-speed data line integrity preservation in telecom, automotive, and industrial interfaces.
FAQ
What is the primary circuit role of the NUP1301ML3T1 in a system?
The NUP1301ML3T1 serves as a bidirectional ESD protection diode array placed at the interface between a high-speed data line and ground or supply rail. It clamps transient voltages above its forward voltage plus reference potential, diverting ESD current away from sensitive downstream ICs. Its role is strictly transient suppression - not signal conditioning, level shifting, or power regulation - and it remains non-conductive during normal 70 Vdc operation.
Does the NUP1301ML3T1 require external biasing to function in rail-to-rail configuration?
No, the NUP1301ML3T1 does not require external biasing. Its internal back-to-back diode structure (pin 1 anode, pins 2 and 3 cathodes) enables inherent rail-to-rail clamping: transients exceeding VF + VCC forward-bias the upper diode toward VCC, while those below GND − VF activate the lower diode toward ground. This self-directed behavior eliminates need for external pull-up/pull-down resistors in I²C or video line protection designs.
Is the NUP1301ML3T1 suitable for protecting 12 V automotive data lines?
Yes, the NUP1301ML3T1 is suitable for 12 V automotive data lines. Its 70 V reverse voltage rating provides ample margin above 12 V nominal systems, and its AEC-Q101 qualification confirms performance under automotive temperature, vibration, and reliability stress conditions. It has been deployed in T3/E3 secondary IC protection and infotainment video line applications where 12 V supply rails coexist with high-speed signals.
How does the 0.9 pF capacitance of the NUP1301ML3T1 impact signal integrity on I²C lines?
The 0.9 pF maximum capacitance of the NUP1301ML3T1 introduces negligible loading on standard-mode (100 kHz) and fast-mode (400 kHz) I²C buses, preserving rise/fall time budgets and preventing false ACK/NACK generation. At 400 kHz, this capacitance contributes <0.5 ns additional RC delay with typical 1 kΩ pull-up, well within I²C specification margins - confirmed in onsemi application notes for microcontroller input protection use cases.
What marking code identifies the NUP1301ML3T1 on the SOT-23 package?
The NUP1301ML3T1 is marked on the SOT-23 package with "53" as the device code, followed by a date code (e.g., "M") and a Pb-free indicator (microdot or "G"). Per onsemi's generic marking diagram for Style 11, pin 1 is identified by the beveled edge or notch, and the top-side marking appears adjacent to pin 1. The full ordering part number SZNUP1301ML3T1G includes the "SZ" prefix denoting automotive qualification and unique site control.
NUP1301ML3T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V (Max)
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- Automotive
- Capacitance @ Frequency:
- 0.9pF @ 1MHz (Max)
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
NUP1301ML3T1 FAQ
1.How can I place an order for NUP1301ML3T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NUP1301ML3T1 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 NUP1301ML3T1 reliable?
The price and inventory of NUP1301ML3T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NUP1301ML3T1 is usually 5 days.
3.What payment methods are accepted for NUP1301ML3T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NUP1301ML3T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NUP1301ML3T1?
NUP1301ML3T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NUP1301ML3T1 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 NUP1301ML3T1?
For technical support, including NUP1301ML3T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NUP1301ML3T1 requirements.
6.How does Aetrix verify that NUP1301ML3T1 is sourced from the original manufacturer or authorized distributors?
All NUP1301ML3T1 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 NUP1301ML3T1 meets industry standards.
7.What is the process for return or replacement of NUP1301ML3T1?
All NUP1301ML3T1 units undergo pre-shipment inspection (PSI). If there is an issue with NUP1301ML3T1, 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 NUP1301ML3T1 part is unused and in its original packaging.
Return procedure for NUP1301ML3T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NUP1301ML3T1 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
