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onsemi SZCM1213A-02SR
- Part No.:
- SZCM1213A-02SR
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
SZCM1213A-02SR.pdf
- Description:
- TVS DIODE 3.3VWM 10VC SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,198
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Product details
Overview
SZCM1213A-02SR from onsemi is a two-channel, low-capacitance ESD protection diode array in SOT-143-4 package, designed for high-speed data lines requiring minimal signal distortion. It delivers ±12 kV IEC 61000−4−2 contact ESD protection, 0.85 pF typical channel input capacitance, and clamps transients to +10 V (positive) and −1.7 V (negative) at 1 A, enabling robust USB2.0 and IEEE1394 interface protection.
For engineers reviewing the SZCM1213A-02SR datasheet, pinout, applications, or equivalent options, key selection criteria include channel count, ultra-low capacitance matching (0.02 pF typical), AEC-Q101 qualification for automotive use, VP/VN rail clamping architecture, and SOT-143-4 thermal and layout compatibility with high-density PCBs.
Technical Context
The SZCM1213A-02SR implements a dual-diode steering topology per channel-pairing top and bottom diodes between each I/O pin and VP/VN rails-to divert ESD current away from protected circuitry. Its integrated Zener diode between VP and VN actively clamps supply rail voltage during positive ESD events, eliminating need for external bypass capacitors in many designs.
Each channel operates with matched input capacitance (0.02 pF typical variation) and maintains stable performance across temperature and bias voltage. The device supports continuous operation up to 5.5 V supply differential and withstands ≥1000 ESD strikes at ±8 kV contact discharge under IEC 61000−4−2 Level 4 conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating (IEC 61000−4−2) | ±12 kV contact discharge - ensures full Level 4 system-level immunity without additional protection stages |
| Channel Input Capacitance | 0.85 pF typical at 1 MHz - preserves signal integrity on 480 Mbps USB2.0 and 800 Mbps FireWire links |
| Capacitance Matching | 0.02 pF typical - enables precise differential pair protection without skew-induced jitter |
| Clamp Voltage (VCL) | +10 V (positive), −1.7 V (negative) at 1 A - limits transient overvoltage seen by downstream PHY or controller |
| Operating Supply Range | 3.3 V to 5.5 V (VP–VN) - compatible with standard logic I/O voltage domains including USB, DVI, and SATA |
| Leakage Current | 1.0 µA max at 5 V - avoids DC loading of high-impedance signal paths or reference nodes |
| Dynamic Resistance | 0.9 Ω (positive), 0.5 Ω (negative) - minimizes IR drop during fast ESD pulse conduction |
Pinout & Package
SZCM1213A-02SR is housed in a Pb-free SOT-143-4 (Case 318A) surface-mount package measuring 2.90 × 1.40 × 1.00 mm, optimized for automated placement and thermal dissipation in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VN | Negative supply rail connection - ties directly to system ground plane; serves as return path for negative ESD current |
| 2 | CH1 | First protected I/O channel - routes high-speed signal (e.g., USB D+) through bidirectional ESD clamp network |
| 3 | CH2 | Second protected I/O channel - pairs with CH1 for differential signaling; shares identical capacitance and clamping specs |
| 4 | VP | Positive supply rail connection - supplies clamping reference for positive transients and hosts integrated Zener diode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports infotainment, ADAS camera, and telematics interfaces |
| Integrated VP–VN Zener | Eliminates need for external 0.22 µF bypass capacitor in most applications - reduces BOM count and PCB area |
| Low capacitance matching | 0.02 pF typical mismatch between CH1 and CH2 - prevents common-mode-to-differential conversion in differential buses |
| 1000+ ESD strike endurance | Retains full electrical specs after 1000× ±8 kV contact discharges - ensures long-term reliability in field-deployed systems |
| Pb-free, RoHS-compliant | Meets global environmental regulations and lead-free reflow profiles - compatible with standard SnAgCu solder processes |
Applications
| USB2.0 Interface Protection | IEEE1394 (FireWire) Port Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB2.0 ports in automotive head units and industrial HMIs against connector-based ESD events. IC Role / Device Role / Timing Role: Bidirectional ESD clamp placed immediately adjacent to USB connector, shunting transients before they reach USB transceiver PHY. Use Value: 0.85 pF capacitance avoids signal rise-time degradation at 480 Mbps; ±12 kV rating exceeds USB-IF compliance thresholds. | Use Scenario: Safeguarding 400/800 Mbps IEEE1394 data pairs in professional audio/video equipment exposed to frequent cable hot-plug events. IC Role / Device Role / Timing Role: Dual-channel transient voltage suppressor routing both data lanes to shared VP/VN rails while maintaining impedance continuity. Use Value: 0.02 pF capacitance matching prevents skew-induced bit errors; low dynamic resistance ensures rapid energy dissipation. |
| HDMI/DVI Data Lane Protection | SATA Differential Pair Protection |
Use Scenario: Shielding TMDS clock and data channels in notebook display interfaces from ESD induced during docking/undocking. IC Role / Device Role / Timing Role: Low-capacitance ESD array placed at edge connector, with VP tied to 3.3 V supply and VN to chassis ground. Use Value: Sub-1 pF input capacitance preserves 1.65 GHz TMDS eye diagram integrity; Zener clamping stabilizes supply rail during multi-pin strikes. | Use Scenario: Protecting SATA Gen II/III TX/RX differential pairs in SSD modules and motherboard controllers from handling ESD. IC Role / Device Role / Timing Role: Two independent ESD protection paths per lane, sharing VP/VN rails to minimize component count and layout complexity. Use Value: Matched capacitance ensures <1 ps inter-pair skew; clamp voltage stays below SATA receiver absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Single-channel, 0.8 pF, SOT-553 package - lacks dual-channel integration and AEC-Q101 qualification | Requires two devices for dual-lane protection; not automotive-qualified | Select when board space permits discrete placement and automotive qualification is unnecessary |
| ESD56081D05 | Two-channel, 0.5 pF, SOT-23-6 - lower capacitance but no integrated VP–VN Zener; requires external bypass cap | Better for ultra-high-speed (>5 Gbps) links but increases BOM and layout complexity | Prefer for PCIe Gen4/5 or MIPI D-PHY where sub-0.6 pF is mandatory and supply rail stability is managed externally |
Compared with TPD2E001DRYR and ESD56081D05, SZCM1213A-02SR uniquely combines dual-channel integration, AEC-Q101 qualification, and Zener-enabled supply rail clamping in a compact SOT-143-4 footprint-reducing component count, simplifying layout, and meeting stringent automotive reliability requirements without sacrificing high-speed performance.
Availability
SZCM1213A-02SR is available at Aetrix Electronics and suitable for USB2.0 interface protection, automotive infotainment data links, and industrial HDMI/DVI port hardening requiring stable component supply across production lifecycles.
Supply support for SZCM1213A-02SR 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, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The CM1213A family-including SZCM1213A-02SR-is engineered specifically for high-speed serial interface ESD protection, balancing ultra-low capacitance, robust transient suppression, and automotive-grade reliability in miniature packages.
FAQ
What is the maximum operating voltage for SZCM1213A-02SR?
The SZCM1213A-02SR supports an operating supply voltage range of 3.3 V to 5.5 V between VP and VN pins. This allows direct integration into 3.3 V and 5 V logic domains without level-shifting circuitry. Exceeding 5.5 V may damage the internal Zener diode and compromise ESD protection integrity. Always verify VP–VN differential remains within this limit during system power sequencing.
Does SZCM1213A-02SR require an external bypass capacitor?
SZCM1213A-02SR integrates a Zener diode between VP and VN, which actively clamps supply rail voltage during positive ESD events-eliminating the need for an external 0.22 µF bypass capacitor in most applications. However, for lowest possible clamp voltage under heavy multi-pin strikes, adding a 0.22 µF ceramic capacitor close to the VP pin is still recommended per onsemi application guidance.
Is SZCM1213A-02SR suitable for automotive applications?
Yes, SZCM1213A-02SR carries the "SZ" prefix indicating AEC-Q101 qualification and PPAP capability. It has undergone rigorous stress testing-including temperature cycling, HTRB, and ESD-per automotive reliability standards. Its SOT-143-4 package and specified operating range (–40°C to +150°C) make it appropriate for engine control, infotainment, and ADAS camera interface protection.
How does SZCM1213A-02SR handle differential signal pairs?
SZCM1213A-02SR provides matched 0.85 pF input capacitance across CH1 and CH2 with only 0.02 pF typical variation-ensuring minimal inter-channel skew. When used on differential pairs like USB D+/D− or SATA TX+/TX−, this matching preserves common-mode rejection and prevents timing jitter. Each channel operates independently but shares VP/VN rails for compact layout.
What is the leakage current specification for SZCM1213A-02SR?
SZCM1213A-02SR specifies a maximum channel leakage current (ILEAK) of 1.0 µA at 5 V bias (VP = 5 V, VN = 0 V, TA = 25°C). This low leakage avoids loading high-impedance nodes such as reference inputs, sensor outputs, or open-drain bus lines-critical for precision analog and low-power IoT applications where standby current must be minimized.
SZCM1213A-02SR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-253-4, TO-253AA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 10V (Typ)
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- Yes
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143
SZCM1213A-02SR FAQ
1.How can I place an order for SZCM1213A-02SR through Aetrix?
Please submit a Request for Quotation (RFQ) for SZCM1213A-02SR 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 SZCM1213A-02SR reliable?
The price and inventory of SZCM1213A-02SR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZCM1213A-02SR is usually 5 days.
3.What payment methods are accepted for SZCM1213A-02SR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZCM1213A-02SR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZCM1213A-02SR?
SZCM1213A-02SR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZCM1213A-02SR 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 SZCM1213A-02SR?
For technical support, including SZCM1213A-02SR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZCM1213A-02SR requirements.
6.How does Aetrix verify that SZCM1213A-02SR is sourced from the original manufacturer or authorized distributors?
All SZCM1213A-02SR 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 SZCM1213A-02SR meets industry standards.
7.What is the process for return or replacement of SZCM1213A-02SR?
All SZCM1213A-02SR units undergo pre-shipment inspection (PSI). If there is an issue with SZCM1213A-02SR, 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 SZCM1213A-02SR part is unused and in its original packaging.
Return procedure for SZCM1213A-02SR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZCM1213A-02SR 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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