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onsemi PACDN042Y3-LF
- Part No.:
- PACDN042Y3-LF
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PACDN042Y3-LF.pdf
- Description:
- SURGE PROTECTORARRAYS
- Quantity:
- Payment:
- Shipping:
Inventory:9,056
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Product details
Overview
PACDN042Y3-LF from onsemi is a 3-pin ESD protection diode array designed for low-capacitance, high-reliability transient suppression on signal lines. It delivers ±20 kV IEC 61000-4-2 contact ESD protection, 6.1 V reverse stand-off voltage, 30 pF capacitance at 2.5 VDC/1 MHz, and clamps to ≤6.8 V (positive) / ≥−0.8 V (negative) at ±10 mA - ideal for safeguarding USB 2.0 data lines in portable electronics.
For engineers reviewing the PACDN042Y3-LF datasheet, pinout, applications, or equivalent options, key selection criteria include its SOT-23-3 package footprint, dual-cathode-to-GND topology, low-leakage (≤100 nA at 5 V), and compatibility with space-constrained, high-speed interface protection where sub-35 pF loading is critical.
Technical Context
The PACDN042Y3-LF implements a dual-channel unidirectional ESD protection architecture with two independent cathodes tied to a common anode (GND). Its internal structure uses silicon avalanche diodes optimized for fast response (<1 ns) to ESD transients while maintaining low dynamic resistance (1.0 Ω forward, 1.4 Ω reverse).
It operates across −40 °C to +85 °C and is rated for 0.225 W power dissipation in SOT-23-3. All pins withstand ±30 kV HBM per MIL-STD-883D Method 3015 and meet Level 4 IEC 61000-4-2 (±8 kV contact discharge) - validated per channel with all other pins open and GND pins grounded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±20 kV contact discharge (IEC 61000-4-2); ±30 kV HBM (MIL-STD-883D) - ensures robust system-level ESD immunity without external circuit derating. |
| Reverse Stand-off Voltage | 6.1 V (min) at 1 mA - defines maximum continuous operating voltage before conduction begins; compatible with 5 V logic interfaces. |
| Clamp Voltage | +6.8 V / −0.8 V at ±10 mA - limits transient voltage seen by protected ICs during ESD events, preserving downstream signal integrity. |
| Capacitance | 30 pF (typ) at 2.5 VDC/1 MHz - enables use on USB 2.0 (480 Mbps), HDMI DDC, and other high-speed digital lines without signal degradation. |
| Leakage Current | ≤100 nA at 5.0 VDC - minimizes standby power loss and avoids interference with high-impedance sensor or analog inputs. |
| Package Power Dissipation | 0.225 W (SOT-23-3) - supports sustained transient energy absorption without thermal runaway in compact layouts. |
Pinout & Package
SOT-23-3 package (Case 318), 2.90 × 1.30 × 1.00 mm, Pb-free and RoHS compliant. Standard top-view orientation with marking dot adjacent to Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Channel A) | Connects to first protected signal line (e.g., USB D+); conducts ESD current to GND when voltage exceeds VRWM. |
| 2 | GND | Common anode reference for both protection diodes; must be low-inductance connection to system ground plane. |
| 3 | Cathode (Channel B) | Connects to second protected signal line (e.g., USB D−); independent clamping path ensures balanced protection for differential pairs. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel unidirectional ESD protection | Two independent cathodes share one GND terminal - simplifies routing and reduces board area vs. discrete diodes. |
| Low 30 pF capacitance | Preserves signal rise/fall times on 480 Mbps USB 2.0 and other high-speed interfaces without added jitter or attenuation. |
| ±20 kV IEC 61000-4-2 contact rating | Exceeds industrial and consumer ESD compliance requirements without external TVS staging or layout reinforcement. |
| ≤100 nA leakage at 5 V | Enables direct placement on battery-powered sensor lines or I²C buses without measurable impact on quiescent current. |
| SOT-23-3 footprint | Drop-in compatible with standard pick-and-place equipment and reflow profiles; matches legacy 3-pin ESD diode land patterns. |
Applications
| USB 2.0 Interface Protection | Industrial Serial Port Protection |
|---|---|
|
Use Scenario: Protecting D+ and D− lines of a USB 2.0 host controller in a handheld medical device exposed to frequent handling. IC Role / Device Role / Timing Role: PACDN042Y3-LF acts as primary ESD shunt, clamping transients before they reach the USB PHY, with no timing delay or signal distortion. Use Value: Enables certified IEC 61000-4-2 Level 4 compliance using only one component per differential pair - eliminates need for separate diodes or RC filters. |
Use Scenario: Safeguarding RS-232 TX/RX pins on a factory-floor PLC module subject to operator-induced ESD during cable insertion. IC Role / Device Role / Timing Role: PACDN042Y3-LF provides bidirectional transient suppression on each signal line referenced to local GND, maintaining signal fidelity up to 115.2 kbps. Use Value: Prevents latch-up or permanent damage to UART transceivers while adding <0.1 mm² PCB area - critical for dense industrial control boards. |
| Consumer Audio Docking Port | Automotive Infotainment USB Hub |
|
Use Scenario: Shielding proprietary docking connector pins (audio, power, data) in a smart speaker base station. IC Role / Device Role / Timing Role: PACDN042Y3-LF protects multiple low-voltage analog and digital signals simultaneously via shared GND, with no cross-talk between channels. Use Value: Achieves full ESD robustness with single-component solution - reduces BOM count and assembly cost versus multi-diode arrays or discrete placements. |
Use Scenario: Securing upstream/downstream USB ports on an automotive head unit supporting smartphone mirroring. IC Role / Device Role / Timing Role: PACDN042Y3-LF serves as front-end ESD guard for USB data lanes, operating reliably across −40 °C to +85 °C under vehicle cabin thermal cycling. Use Value: Maintains 30 pF loading and <100 nA leakage over full temperature range - ensures consistent USB enumeration and error-free high-speed transfers. |
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 3.3 V stand-off voltage; 25 pF capacitance; single-channel SOD-523 package. | Better suited for 3.3 V I/O rails but requires two devices for differential protection; smaller footprint but higher assembly cost. | Select when protecting 3.3 V-only interfaces with strict capacitance budget (<25 pF) and board space is premium. |
| TPD2E001DRSR | 0.8 pF typical capacitance; dual-channel; 5.5 V stand-off; 0.5 pF lower leakage; SON-6 package. | Optimized for ultra-high-speed interfaces (e.g., USB 3.0 SS lines); higher cost and tighter layout tolerances required. | Choose for next-gen designs needing sub-1 pF loading on SuperSpeed lanes - not suitable as drop-in replacement for PACDN042Y3-LF's 5 V rail use case. |
Compared with ESD5Z3.3T5G and TPD2E001DRSR, PACDN042Y3-LF offers the optimal balance of 5 V compatibility, dual-channel integration in SOT-23-3, and proven 30 pF/±20 kV performance for mainstream USB 2.0 and serial port protection - making it the most cost-effective and layout-efficient choice for volume consumer and industrial applications.
Availability
PACDN042Y3-LF is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial serial port hardening, and consumer docking station designs requiring stable component supply and long-term manufacturability.
Supply support for PACDN042Y3-LF 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, sensing, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The PACDN042Y3-LF belongs to onsemi's PACD family of ESD protection arrays, engineered specifically for compact, high-reliability transient suppression on high-speed digital and mixed-signal interfaces in space-constrained end equipment.
FAQ
What is the maximum operating temperature for PACDN042Y3-LF?
The PACDN042Y3-LF is rated for continuous operation from −40 °C to +85 °C, matching industrial ambient requirements. Its thermal design supports 0.225 W dissipation in SOT-23-3 packaging, enabling reliable performance in sealed enclosures or near heat-generating components without derating.
Does PACDN042Y3-LF support bidirectional ESD protection?
No - PACDN042Y3-LF is a unidirectional ESD protection diode array. Each cathode conducts only when its signal line goes positive relative to GND; negative transients are clamped to −0.8 V via internal diode forward conduction. For true bidirectional protection, a symmetric TVS like SMAJ5.0A would be required.
Can PACDN042Y3-LF be used on USB 3.0 SuperSpeed lanes?
No - PACDN042Y3-LF's 30 pF capacitance exceeds the <1.5 pF typical requirement for USB 3.0 Gen 1 (5 Gbps) differential lanes. It is qualified for USB 2.0 (480 Mbps) and lower-speed interfaces. For SuperSpeed, consider onsemi's ESD7L5.0DT5G (0.8 pF) or TPD2E001DRSR.
What is the meaning of "Y3" in PACDN042Y3-LF?
The "Y3" suffix in PACDN042Y3-LF denotes the SOT-23-3 package variant per onsemi's ordering nomenclature. This distinguishes it from other members of the PACDN042 family such as PACDN042YB3R (SC-70-3) and confirms its Case 318 mechanical outline and 3-pin pinout.
Is PACDN042Y3-LF compliant with automotive AEC-Q200 standards?
No - PACDN042Y3-LF is not AEC-Q200 qualified. It is rated for industrial temperature range (−40 °C to +85 °C) and intended for commercial and industrial applications. For automotive-grade ESD protection, consider onsemi's NUP4201MR6T1G (AEC-Q200 qualified, SOT-23-6).
PACDN042Y3-LF 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):
- 6.1V (Min)
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- 8V
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 30pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
PACDN042Y3-LF FAQ
1.How can I place an order for PACDN042Y3-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for PACDN042Y3-LF 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 PACDN042Y3-LF reliable?
The price and inventory of PACDN042Y3-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PACDN042Y3-LF is usually 5 days.
3.What payment methods are accepted for PACDN042Y3-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PACDN042Y3-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PACDN042Y3-LF?
PACDN042Y3-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PACDN042Y3-LF 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 PACDN042Y3-LF?
For technical support, including PACDN042Y3-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PACDN042Y3-LF requirements.
6.How does Aetrix verify that PACDN042Y3-LF is sourced from the original manufacturer or authorized distributors?
All PACDN042Y3-LF 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 PACDN042Y3-LF meets industry standards.
7.What is the process for return or replacement of PACDN042Y3-LF?
All PACDN042Y3-LF units undergo pre-shipment inspection (PSI). If there is an issue with PACDN042Y3-LF, 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 PACDN042Y3-LF part is unused and in its original packaging.
Return procedure for PACDN042Y3-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PACDN042Y3-LF 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
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