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onsemi SMDA12CDR2G
- Part No.:
- SMDA12CDR2G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
SMDA12CDR2G.pdf
- Description:
- ESD / SURGE PROTECTOR 4 CHANNEL
- Quantity:
- Payment:
- Shipping:
Inventory:23,371
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Product details
Overview
SMDA12CDR2G from onsemi is a bi-directional ESD/surge protection diode array in SO−8 package, designed for high-speed data line protection with 12 V reverse working voltage, 13.3 V breakdown voltage, and 19 V clamping voltage at 1.0 A pulse current. It delivers 300 W peak power (8 × 20 µs), supports ±15 kV air/±8 kV contact ESD immunity per IEC 61000−4−2, and is used in LAN/WAN equipment and notebook PC I/O lines.
For engineers reviewing the SMDA12CDR2G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage at 1.0 A and 5.0 A, junction capacitance (120 pF), peak pulse current (12 A), and SO−8 package compatibility with high-speed signal integrity requirements.
Technical Context
The SMDA12CDR2G integrates four identical unidirectional ESD protection diodes connected to a common cathode, enabling simultaneous protection of four high-speed data lines against transient threats. Its architecture ensures low clamping voltage under surge conditions while maintaining sub-1.0 µA leakage at 12 V VRWM.
It meets IEC 61000−4−2 (ESD), IEC 61000−4−4 (EFT), and IEC 61000−4−5 (surge) standards with validated 12 A peak pulse current handling and 120 pF junction capacitance at 0 V bias and 1 MHz - critical for USB 2.0, HDMI, and Ethernet signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage | 12 V - maximum continuous DC or RMS signal voltage the device blocks without conduction. |
| Breakdown Voltage | 13.3 V min @ 1.0 mA - ensures reliable turn-on before system-level damage occurs during transients. |
| Clamping Voltage (1.0 A) | 19 V max - limits voltage seen by protected ICs during 8 × 20 µs surges, preserving downstream logic. |
| Clamping Voltage (5.0 A) | 24 V max - maintains safe overvoltage margin even under higher-energy 5 A transients. |
| Junction Capacitance | 120 pF @ 0 V, 1 MHz - low enough to avoid signal degradation on USB 2.0 and 100BASE-TX interfaces. |
| Peak Pulse Current | 12 A @ 8 × 20 µs - withstands IEC 61000−4−5 Level 2 surge events without failure. |
| ESD Rating | ±15 kV air / ±8 kV contact per IEC 61000−4−2 - exceeds industrial and computing ESD immunity requirements. |
Pinout & Package
Package: SO−8 (Case 751−07), Pb−Free, RoHS compliant, 4.9 mm × 3.9 mm footprint with 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Anode (x4) | Each connects to a separate high-speed data line (e.g., USB D+, D−, HDMI TMDS+, −); conducts transient current to cathode when voltage exceeds VBR. |
| 5, 6, 7, 8 | Common Cathode | Single low-inductance return path to ground or chassis; enables compact layout and consistent clamping across all four channels. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional ESD protection | Four independent anode-to-cathode paths enable symmetrical clamping on differential or single-ended lines without polarity constraints. |
| 300 W peak power rating | Handles 8 × 20 µs surges up to 12 A without thermal runaway, supporting IEC 61000−4−5 compliance in compact SO−8 form factor. |
| Low 120 pF junction capacitance | Minimizes signal rise-time distortion and insertion loss on 480 Mbps USB 2.0 and 100 Mbps Ethernet links. |
| UL 94 V−0 flammability rating | Ensures flame-retardant housing integrity during fault conditions, meeting safety requirements for end-user computing equipment. |
| Pb−Free, Halogen Free/BFR Free | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for standard reflow. |
Applications
| USB 2.0 Port Protection | HDMI Interface Protection |
|---|---|
|
Use Scenario: Protecting upstream/downstream USB 2.0 ports on notebook PCs and docking stations from ESD events during cable insertion. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between connector pins and USB PHY IC, clamping fast-rising ESD pulses before they reach sensitive transceivers. Use Value: Maintains 480 Mbps data integrity with only 120 pF loading and clamps to ≤19 V at 1.0 A, preventing PHY latch-up or damage. |
Use Scenario: Safeguarding HDMI source/sink connectors on monitors and media players against contact ESD during hot-plug operations. IC Role / Device Role / Timing Role: Four-channel TVS array protecting TMDS+ and TMDS− pairs plus DDC and CEC lines simultaneously. Use Value: Delivers matched clamping response across all channels with <1 ns response time, avoiding skew-induced video artifacts. |
| 10/100BASE-TX Ethernet PHY Protection | Industrial Serial Port Protection |
|
Use Scenario: Shielding RJ-45 magnetics secondary side and PHY interface in industrial gateways and network switches. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp on differential TX+/TX− and RX+/RX− pairs, referenced to local ground plane. Use Value: 120 pF capacitance avoids signal integrity degradation at 100 Mbps, while 24 V clamping at 5 A prevents PHY overvoltage during lightning-induced surges. |
Use Scenario: Hardening RS-232/RS-485 transceiver I/O pins in factory automation controllers exposed to EFT noise in noisy plant environments. IC Role / Device Role / Timing Role: Multi-line protector absorbing 40 A EFT bursts (IEC 61000−4−4) on serial port lines without disrupting UART timing. Use Value: Withstands repeated 5/50 ns EFT transients up to 40 A while maintaining <1 µA leakage at 12 V, ensuring reliable idle-state detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD/surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E05U06DQAR (Texas Instruments) | Lower 6 V VRWM, 12 pF capacitance, 3.6 V clamping at 1 A; quad-channel, DQFN-10 package. | Better suited for low-voltage, high-speed interfaces like USB 3.0 or MIPI; not rated for 12 V systems. | Select when protecting 3.3 V or 5 V logic with strict capacitance budget (<15 pF); not interchangeable with SMDA12CDR2G due to voltage mismatch. |
| SP1004-04UTG (Littelfuse) | 12 V VRWM, 150 pF capacitance, 24 V clamping at 1 A, SO-8 package, 15 kV ESD rating. | Higher capacitance increases signal attenuation on >100 Mbps links; same footprint but different pin mapping (cathode on Pin 8 only). | Acceptable for 10/100 Ethernet or slower serial lines where 150 pF is tolerable; verify PCB layout compatibility due to differing cathode terminal assignment. |
Compared with TPD4E05U06DQAR and SP1004-04UTG, the SMDA12CDR2G offers optimal balance of 12 V operating margin, 120 pF capacitance, and SO-8 pinout for legacy high-speed interfaces - making it preferred for USB 2.0, HDMI, and industrial Ethernet where voltage headroom and layout continuity matter.
Availability
SMDA12CDR2G is available at Aetrix Electronics and suitable for LAN/WAN equipment, notebook/desktop PC I/O protection, and industrial serial port hardening requiring stable component supply and long-term lifecycle support.
Supply support for SMDA12CDR2G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The SMDA12CDR2G belongs to onsemi's SMDAxxC series of bi-directional ESD protection arrays, engineered specifically for robust, multi-line transient suppression in high-speed digital interfaces without compromising signal fidelity.
FAQ
What is the maximum clamping voltage of the SMDA12CDR2G at 5.0 A surge current?
The SMDA12CDR2G has a maximum clamping voltage of 24 V at 5.0 A peak pulse current (8 × 20 µs waveform). This value ensures protected downstream ICs-such as USB transceivers or Ethernet PHYs-remain within safe operating voltage limits during moderate-energy surge events, aligning with IEC 61000−4−5 Level 2 requirements. The SMDA12CDR2G achieves this with minimal thermal stress due to its 300 W peak power rating.
Does the SMDA12CDR2G support bidirectional signal lines like USB D+ and D−?
Yes, the SMDA12CDR2G supports bidirectional high-speed data lines via its four independent anode terminals (Pins 1–4) tied to a common cathode (Pins 5–8). Each anode-cathode path conducts during positive or negative transients, providing symmetrical clamping for differential pairs such as USB 2.0 D+ and D−. The SMDA12CDR2G's design eliminates polarity concerns in AC-coupled or full-duplex interfaces.
What is the junction capacitance of the SMDA12CDR2G and why does it matter for high-speed interfaces?
The SMDA12CDR2G exhibits 120 pF junction capacitance at 0 V bias and 1 MHz. This value is critical for maintaining signal integrity on interfaces like USB 2.0 (480 Mbps) and 100BASE-TX Ethernet, where excessive capacitance causes rise-time degradation and bit errors. At 120 pF, the SMDA12CDR2G introduces negligible loading while still delivering robust 12 A surge handling-making it a balanced choice for speed and protection.
Is the SMDA12CDR2G RoHS compliant and what is its flammability rating?
Yes, the SMDA12CDR2G is RoHS compliant, Pb−Free, and Halogen Free/BFR Free per manufacturer documentation. It carries a UL 94 V−0 flammability rating, confirming that its molded compound self-extinguishes within 10 seconds after flame removal and produces no flaming drips. This certification supports safe integration into consumer and industrial end-equipment subject to regional safety regulations.
How many data lines can one SMDA12CDR2G protect simultaneously?
The SMDA12CDR2G protects up to four independent high-speed data lines simultaneously-each connected to Pins 1, 2, 3, or 4-with all anodes referenced to the common cathode terminals (Pins 5–8). This quad-channel configuration allows single-component protection of interfaces such as USB 2.0 (D+, D−, ID, VBUS sense), HDMI (three TMDS pairs + CEC), or four RS-232 lines, reducing BOM count and PCB area versus discrete TVS solutions.
SMDA12CDR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SMDA12CDR2G FAQ
1.How can I place an order for SMDA12CDR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA12CDR2G 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 SMDA12CDR2G reliable?
The price and inventory of SMDA12CDR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA12CDR2G is usually 5 days.
3.What payment methods are accepted for SMDA12CDR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA12CDR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA12CDR2G?
SMDA12CDR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA12CDR2G 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 SMDA12CDR2G?
For technical support, including SMDA12CDR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA12CDR2G requirements.
6.How does Aetrix verify that SMDA12CDR2G is sourced from the original manufacturer or authorized distributors?
All SMDA12CDR2G 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 SMDA12CDR2G meets industry standards.
7.What is the process for return or replacement of SMDA12CDR2G?
All SMDA12CDR2G units undergo pre-shipment inspection (PSI). If there is an issue with SMDA12CDR2G, 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 SMDA12CDR2G part is unused and in its original packaging.
Return procedure for SMDA12CDR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA12CDR2G Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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ESD5Z3.3T1G
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D5V0H1B2LP-7B
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D5V0P1B2LP-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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