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Diodes Incorporated DESD1CAN2WQ-7
- Part No.:
- DESD1CAN2WQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
DESD1CAN2WQ-7.pdf
- Description:
- GENERAL PROTECTION PP SOT323 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:9,814
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Product details
Overview
DESD1CAN2WQ-7 from Diodes Incorporated is a dual-channel AEC-Q101-qualified ESD protection diode in SOT323 package, designed specifically for CAN bus data line protection in automotive systems. It delivers ±23 kV IEC 61000-4-2 contact/air ESD immunity, 150 W peak pulse power per channel (8/20 µs), 9.3 pF typical channel capacitance at 0 V, and clamps transients to ≤50 V at 3 A IPP - enabling robust signal integrity in high-noise vehicle networks.
For engineers reviewing the DESD1CAN2WQ-7 datasheet, DESD1CAN2WQ-7 pinout, DESD1CAN2WQ-7 application, or DESD1CAN2WQ-7 equivalent, key selection criteria include bidirectional clamping voltage (≤50 V @ 3 A), low inter-channel capacitance mismatch (≤2.2%), AEC-Q101 qualification status, SOT323 thermal resistance (420 °C/W), and automotive PPAP readiness.
Technical Context
This device implements a dual-channel, bidirectional TVS structure with symmetrical breakdown (VBR min = 25.4 V) and matched parasitic capacitance across channels. Its low 9.3 pF CT at 0 V and <0.22 pF inter-channel capacitance delta ensure minimal signal distortion on high-speed CAN FD (up to 5 Mbps) differential pairs.
Thermally, it leverages a lead-free matte tin-plated Alloy 42 leadframe in SOT323, rated for -55 °C to +150 °C operation and 300 mW steady-state power dissipation on FR-4 PCB. The 420 °C/W RθJA enables reliable transient energy handling without thermal runaway under repeated 8/20 µs surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Min) | 25.4 V - Ensures reliable conduction onset above CAN common-mode range (±12 V) while avoiding false triggering |
| IPP (Max) | 3 A - Withstands automotive ISO 7637-3 pulse 3b surges without degradation |
| CT (Typ) | 9.3 pF @ 0 V - Maintains CAN signal rise/fall time integrity up to 5 Mbps |
| VCL @ 3A | 50 V - Limits bus voltage excursion during worst-case transients to preserve transceiver survival |
| ESD Rating | ±23 kV contact/air - Exceeds IEC 61000-4-2 Level 4 for harsh assembly and field environments |
| Operating Temp | -55 °C to +150 °C - Fully supports under-hood automotive placement per AEC-Q101 stress test conditions |
Pinout & Package
Package: SOT323 - 3-pin surface-mount plastic case (1.8–2.2 mm × 2.0–2.2 mm × 0.9–1.0 mm), moisture sensitivity level 1, UL 94V-0 rated, 0.006 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Channel 1 Anode | Connects to CAN_H line; forms one half of bidirectional clamping path with Pin 3 |
| Pin 2 | Cathode Common | Shared cathode node tied to ground plane; enables compact dual-channel layout |
| Pin 3 | Channel 2 Anode | Connects to CAN_L line; symmetric clamping path mirrors Pin 1 for differential protection |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel ESD protection | Single SOT323 package protects both CAN_H and CAN_L lines with matched electrical characteristics |
| Low inter-channel capacitance mismatch | ΔCT ≤ 0.22 pF ensures balanced signal propagation delay and common-mode rejection |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD stress per Rev G requirements |
| Lead-free & halogen-free construction | Meets RoHS 3 (2015/863/EU) and "Green" definition (<900 ppm Br+Cl, <1000 ppm Sb) |
Applications
| Automotive CAN Bus Nodes | Industrial CANopen Networks |
|---|---|
Use Scenario: Protection of ECUs, body control modules, and ADAS sensors connected to high-speed CAN FD buses in vehicles. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed directly at connector interface to shunt ESD and load dump energy before CAN transceivers. Use Value: Prevents latch-up or permanent damage to CAN transceivers during ±23 kV ESD events while preserving signal fidelity via 9.3 pF capacitance. | Use Scenario: Securing programmable logic controllers (PLCs) and motor drives communicating over CANopen in factory automation. IC Role / Device Role / Timing Role: Front-end ESD guard for industrial-grade CAN transceivers exposed to maintenance personnel and electrostatic-prone environments. Use Value: Enables uninterrupted operation in ungrounded or floating-ground plant floors where air-gap discharges exceed 15 kV. |
| Automotive Gateway Modules | Electric Vehicle Battery Management Systems |
Use Scenario: Protecting multi-protocol gateways that bridge CAN, LIN, and Ethernet domains in modern vehicle architectures. IC Role / Device Role / Timing Role: Dual-line clamp isolating CAN physical layer from cross-domain noise coupling and hot-swap transients. Use Value: Maintains protocol coexistence by limiting coupled surge energy to <50 V, preventing false frame errors or arbitration loss. | Use Scenario: Safeguarding BMS cell monitoring ICs and pack-level CAN interfaces exposed to high dv/dt switching noise from inverters. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor placed between battery pack harness and isolated CAN transceiver. Use Value: Reduces capacitive loading on high-impedance sense lines while clamping fast-rising inverter-induced spikes to safe levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel automotive CAN ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF15CA-TP (Micro Commercial) | Higher VBR (15 V min), higher CT (15 pF typ), not AEC-Q101 qualified | Limited to non-automotive industrial CAN nodes without PPAP or temperature cycling validation | Select only for cost-sensitive non-automotive designs where 15 V standoff suffices and AEC compliance is waived |
| TPD2E001DRYR (Texas Instruments) | Lower VBR (5.5 V), lower IPP (1.5 A), 10.5 pF CT, AEC-Q100 Grade 1 | Targeted at low-voltage CAN variants (e.g., fault-tolerant CAN with 5 V supply); insufficient for 24 V system surges | Prefer for 5 V CAN transceivers in infotainment modules; avoid for powertrain or chassis CAN requiring 25.4 V VBR margin |
Compared with SMF15CA-TP and TPD2E001DRYR, DESD1CAN2WQ-7 uniquely combines AEC-Q101 qualification, 25.4 V VBR margin for 24 V systems, and sub-10 pF capacitance - making it the only option validated for under-hood CAN FD nodes demanding simultaneous high-voltage surge tolerance and signal integrity.
Availability
DESD1CAN2WQ-7 is available at Aetrix Electronics and suitable for automotive ECU design, industrial CANopen gateway development, and electric vehicle battery management systems requiring stable component supply across extended production lifecycles.
Supply support for DESD1CAN2WQ-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The DESD1CAN2WQ-7 belongs to Diodes' Automotive-Grade ESD Protection portfolio, engineered specifically to meet stringent AEC-Q101 reliability requirements and PPAP documentation needs for CAN bus interface protection in safety-critical vehicle subsystems.
FAQ
What is the maximum clamping voltage of DESD1CAN2WQ-7 at 3 A peak pulse current?
The maximum clamping voltage is 50 V under 8/20 µs waveform conditions at 3 A peak pulse current, as specified in the Electrical Characteristics table. This value ensures CAN transceivers remain within their absolute maximum ratings during severe surge events, preventing latch-up or permanent damage in automotive environments.
Is DESD1CAN2WQ-7 compatible with CAN FD data rates up to 5 Mbps?
Yes - its 9.3 pF typical channel capacitance at 0 V and <0.22 pF inter-channel mismatch minimize signal distortion and timing skew, enabling reliable operation at CAN FD bit rates up to 5 Mbps. Layout best practices (short traces, ground plane beneath SOT323) are required to maintain impedance integrity.
Does DESD1CAN2WQ-7 require external biasing or control signals?
No - it is a passive, bidirectional TVS diode array with no external control pins or bias requirements. It operates automatically upon detection of overvoltage transients exceeding its 25.4 V breakdown threshold, making it ideal for space-constrained CAN bus interface protection without added circuitry.
How does the SOT323 package affect thermal performance in continuous operation?
The SOT323 package has a junction-to-ambient thermal resistance of 420 °C/W on standard FR-4 PCB. While optimized for transient suppression, its 300 mW steady-state power rating means it must not be subjected to sustained reverse leakage or DC overvoltage - it is intended solely for transient event clamping, not continuous power dissipation.
DESD1CAN2WQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 25.4V
- Voltage - Clamping (Max) @ Ipp:
- 50V
- Current - Peak Pulse (10/1000µs):
- 3A (8/20µs)
- Power - Peak Pulse:
- 150W
- Power Line Protection:
- No
- Applications:
- CAN
- Capacitance @ Frequency:
- 9.3pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DESD1CAN2WQ-7 FAQ
1.How can I place an order for DESD1CAN2WQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DESD1CAN2WQ-7 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 DESD1CAN2WQ-7 reliable?
The price and inventory of DESD1CAN2WQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DESD1CAN2WQ-7 is usually 5 days.
3.What payment methods are accepted for DESD1CAN2WQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DESD1CAN2WQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DESD1CAN2WQ-7?
DESD1CAN2WQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DESD1CAN2WQ-7 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 DESD1CAN2WQ-7?
For technical support, including DESD1CAN2WQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DESD1CAN2WQ-7 requirements.
6.How does Aetrix verify that DESD1CAN2WQ-7 is sourced from the original manufacturer or authorized distributors?
All DESD1CAN2WQ-7 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 DESD1CAN2WQ-7 meets industry standards.
7.What is the process for return or replacement of DESD1CAN2WQ-7?
All DESD1CAN2WQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DESD1CAN2WQ-7, 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 DESD1CAN2WQ-7 part is unused and in its original packaging.
Return procedure for DESD1CAN2WQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DESD1CAN2WQ-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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