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onsemi 1SMA10CAT3
- Part No.:
- 1SMA10CAT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA10CAT3.pdf
- Description:
- TVS DIODE 10VWM 17VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:5,874
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Product details
Overview
1SMA10CAT3 from ON Semiconductor is a bidirectional 400 W peak power Zener transient voltage suppressor (TVS) in SMA package, designed for clamping high-energy transients. It features a 10 V working peak reverse voltage (VRWM), 17.0 V clamping voltage (VC) at 23.5 A peak pulse current (IPP), and <1 ns response time. It is used to protect communication systems, automotive electronics, and industrial power supplies against ESD and surge events.
For engineers reviewing the 1SMA10CAT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system operating voltage, VC margin relative to protected IC's absolute maximum rating, IPP capability under IEC 61000-4-5 waveforms, and junction capacitance (580 pF @ 0 V) for high-speed signal line compatibility.
Technical Context
This device operates as a bidirectional avalanche diode, conducting symmetrically in both polarities once the reverse voltage exceeds its breakdown threshold (VBR = 11.1–12.27 V at 1.0 mA). Its low zener impedance and fast sub-nanosecond response enable effective suppression of ESD (Class 3, >16 kV HBM) and lightning-induced surges.
The SMA package (Case 403D) supports top-slide or bottom-mount PCB assembly with flat handling surface and Pb-free construction. Thermal resistance from junction-to-lead is 20 °C/W, enabling reliable 400 W pulse dissipation at TL = 25°C for 1 ms non-repetitive pulses per R.E.A. 10/1000 µs waveform.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 10 V - Maximum continuous reverse operating voltage before clamping begins; must be ≥ circuit's DC or peak AC voltage. |
| VBR @ IT=1.0 mA | 11.1–12.27 V - Breakdown voltage range defining turn-on threshold; ensures predictable clamping onset. |
| VC @ IPP=23.5 A | 17.0 V - Clamped voltage during 400 W surge; determines maximum stress on downstream components. |
| IPP | 23.5 A - Peak pulse current supported at 10/1000 µs waveform; correlates to IEC 61000-4-5 Level 4 immunity. |
| CJ @ 0 V, 1 MHz | 580 pF - Junction capacitance affecting signal integrity on data lines; limits use in >10 Mbps interfaces. |
| Response Time | <1 ns - Time to enter clamping state; critical for protecting against fast ESD transients (IEC 61000-4-2). |
| ESD Rating | Class 3 (>16 kV) HBM - Confirmed robustness against human-body model electrostatic discharge events. |
Pinout & Package
Package: SMA (Case 403D), surface-mount, Pb-free, bidirectional configuration with cathode polarity notch (non-polarity-indicating per datasheet).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during positive transient | Connects to line being protected; forms symmetrical conduction path with cathode under either polarity surge. |
| Cathode | Current entry terminal during negative transient | Paired with anode to provide bidirectional clamping; no functional polarity distinction in operation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 400 W peak pulse power | Supports robust immunity to IEC 61000-4-5 surge tests up to Level 4 (2 kV line-earth, 1 kV line-line). |
| Low zener impedance | Minimizes voltage overshoot during high di/dt transients, improving clamping precision. |
| Flat handling surface | Ensures consistent pick-and-place accuracy during automated SMT assembly. |
| AEC-Q101 qualified (SZ prefix variant) | Validated for automotive under-hood and infotainment applications requiring extended temperature and reliability compliance. |
Applications
| Industrial Power Supply Protection | Automotive Infotainment Interface |
|---|---|
Use Scenario: Protecting 12 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed upstream of DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤17.0 V, preventing latch-up or damage to 20 V-rated input stages while surviving 400 W surges. | Use Scenario: Safeguarding USB 2.0 and CAN FD data lines in head unit modules exposed to vehicle-level ESD and battery transients. IC Role / Device Role / Timing Role: Low-capacitance (580 pF) bidirectional suppressor mounted directly at connector entry points. Use Value: Clamps ±15 kV contact ESD per IEC 61000-4-2 without distorting signal edges due to sub-ns response. |
| Medical Equipment ESD Shielding | Telecom Line Interface Protection |
Use Scenario: Guarding front-panel buttons and sensor inputs in portable ultrasound devices against clinical environment ESD events. IC Role / Device Role / Timing Role: Standoff-mounted TVS on low-voltage analog sensor traces (3.3 V/5 V). Use Value: Provides Class 3 (>16 kV HBM) protection while maintaining signal fidelity via stable 10 V VRWM margin over 3.3 V rail. | Use Scenario: Protecting Ethernet PHY interface pins (RJ45 magnetics secondary side) in VoIP gateways from induced surges. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between transformer center-taps and PHY ICs. Use Value: Withstands 10/1000 µs surges up to 23.5 A while limiting clamped voltage to 17.0 V, below PHY IC's 20 V abs max rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZ1SMA10CAT3G | AEC-Q101 qualified; identical electrical specs but with automotive-grade traceability and PPAP support. | Required for automotive OEM designs; same footprint and performance in non-automotive contexts. | Select SZ1SMA10CAT3G when automotive qualification or site-specific control change requirements apply. |
| 1SMA10AT3G | Unidirectional version; same VRWM (10 V), VBR, and VC, but conducts only in reverse direction. | Suitable only for DC-biased lines where polarity is fixed; not usable on AC or floating signals. | Choose 1SMA10AT3G only if circuit topology guarantees unidirectional transient polarity and lower capacitance (490 pF) is beneficial. |
Compared with 1SMA10CAT3, SZ1SMA10CAT3G adds automotive compliance without electrical trade-offs, while 1SMA10AT3G reduces capacitance by 90 pF but sacrifices bidirectional protection-making it unsuitable for AC-coupled or differential bus applications.
Availability
1SMA10CAT3 is available at Aetrix Electronics and suitable for industrial power supplies, automotive infotainment interfaces, and medical equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1SMA10CAT3 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
ON Semiconductor (now part of onsemi) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1SMAxxCAT3G series belongs to ON Semiconductor's SURMETIC® TVS portfolio, engineered specifically for high-reliability transient suppression in harsh environments including automotive under-hood, industrial controls, and medical electronics.
FAQ
What is the clamping voltage of the 1SMA10CAT3 under a 23.5 A transient?
The 1SMA10CAT3 exhibits a maximum clamping voltage (VC) of 17.0 V when subjected to a 23.5 A peak pulse current (IPP), measured using the standard 10/1000 µs waveform. This value is guaranteed across temperature and ensures downstream components see no more than 17.0 V during surge events, provided layout minimizes parasitic inductance. The 1SMA10CAT3 datasheet specifies this parameter on page 3 under Electrical Characteristics.
Is the 1SMA10CAT3 suitable for protecting USB 2.0 data lines?
The 1SMA10CAT3 has a junction capacitance of 580 pF at 0 V bias, which exceeds typical USB 2.0 requirements (<10–20 pF) and will severely attenuate high-frequency signal integrity. While it provides excellent surge protection, the 1SMA10CAT3 is not recommended for direct placement on USB 2.0 differential pairs. For such applications, lower-capacitance TVS arrays like the ESD9X5.0ST5G should be considered instead of the 1SMA10CAT3.
Does the 1SMA10CAT3 have AEC-Q101 qualification?
The standard 1SMA10CAT3 is not AEC-Q101 qualified; however, its automotive-grade variant SZ1SMA10CAT3G is fully AEC-Q101 qualified and PPAP capable. Both share identical electrical specifications and SMA package dimensions, but only SZ1SMA10CAT3G meets automotive reliability and traceability requirements. Designers requiring automotive certification must specify SZ1SMA10CAT3G-not the 1SMA10CAT3-as the latter lacks required test documentation and process controls.
What is the thermal resistance of the 1SMA10CAT3 from junction to lead?
The 1SMA10CAT3 has a thermal resistance from junction-to-lead (RJL) of 20 °C/W, as specified in the Maximum Ratings table on page 2 of the datasheet. This value assumes measurement with zero lead length and is critical for calculating junction temperature rise during repetitive pulse conditions. It enables the 1SMA10CAT3 to safely dissipate 400 W peak power for 1 ms pulses at TL = 25°C, supporting robust surge handling in thermally constrained layouts.
How does the 1SMA10CAT3 differ from the unidirectional 1SMA10AT3G?
The 1SMA10CAT3 is bidirectional, clamping transients of either polarity, whereas the 1SMA10AT3G is unidirectional and only clamps reverse-biased surges. Electrically, both share identical VRWM (10 V), VBR (11.1–12.27 V), and VC (17.0 V), but the 1SMA10AT3G has lower junction capacitance (490 pF vs. 580 pF). The 1SMA10CAT3 is appropriate for AC, floating, or differential signal lines; the 1SMA10AT3G suits DC-biased rails only.
1SMA10CAT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 23.5A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 580pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
1SMA10CAT3 FAQ
1.How can I place an order for 1SMA10CAT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA10CAT3 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 1SMA10CAT3 reliable?
The price and inventory of 1SMA10CAT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA10CAT3 is usually 5 days.
3.What payment methods are accepted for 1SMA10CAT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA10CAT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA10CAT3?
1SMA10CAT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA10CAT3 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 1SMA10CAT3?
For technical support, including 1SMA10CAT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA10CAT3 requirements.
6.How does Aetrix verify that 1SMA10CAT3 is sourced from the original manufacturer or authorized distributors?
All 1SMA10CAT3 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 1SMA10CAT3 meets industry standards.
7.What is the process for return or replacement of 1SMA10CAT3?
All 1SMA10CAT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA10CAT3, 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 1SMA10CAT3 part is unused and in its original packaging.
Return procedure for 1SMA10CAT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMA10CAT3 Tags
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