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onsemi 1SMA16CAT3G
- Part No.:
- 1SMA16CAT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
1SMA16CAT3G.pdf
- Description:
- TVS DIODE 16VWM 26VC 6TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:77,000
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Product details
Overview
1SMA16CAT3G from onsemi is a bidirectional 400 W peak power Zener transient voltage suppressor (TVS) designed for clamping high-energy transients in DC power rails and signal lines. It features a 16 V working peak reverse voltage (VRWM), 26.0 V clamping voltage (VC) at 15.4 A peak pulse current (IPP), and <1 ns response time. It is used in automotive power supply protection, industrial I/O interfaces, and medical equipment surge suppression.
For engineers reviewing the 1SMA16CAT3G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, VC/IPP trade-off for downstream device survivability, junction capacitance (375 pF @ 0 V), and AEC-Q101 qualification for automotive deployment.
Technical Context
The 1SMA16CAT3G operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients above its breakdown voltage range (17.8–19.67 V). Its low zener impedance and fast <1 ns response enable effective suppression of ESD (Class 3 >16 kV HBM) and lightning-induced surges per IEC 61000-4-5.
It is thermally rated for 1.5 W DC dissipation at 75°C with junction-to-lead thermal resistance of 50°C/W, and requires no polarity marking-the cathode notch does not indicate polarity. The device is mounted in the low-profile SMA package (Case 403D) with flat handling surface for automated placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 16 V - Minimum reverse standoff voltage before clamping begins; must exceed system's max continuous operating voltage. |
| VBR (min/typ/max) | 17.8 / 18.74 / 19.67 V - Measured at 1.0 mA test current; defines precise avalanche onset window. |
| VC @ IPP | 26.0 V @ 15.4 A - Maximum clamped voltage during 10/1000 µs surge; determines stress on protected ICs. |
| PPK | 400 W @ 1 ms - Peak transient energy absorption capability under non-repetitive 10×1000 µs waveform. |
| CJ @ 0 V | 375 pF - Junction capacitance at zero bias; impacts high-frequency signal integrity in data line protection. |
| ESD Rating | Class 3 (>16 kV HBM) - Confirmed human-body-model ESD robustness for handling and board-level immunity. |
Pinout & Package
Package: SMA (Case 403D), surface-mount, Pb-free, low-profile plastic package with void-free transfer molding and corrosion-resistant finish. Dimensions: 4.06–4.57 mm length × 2.29–2.92 mm width × 1.97–2.20 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during negative transient | Bidirectional operation: conducts when cathode is negative relative to anode or vice versa. |
| Cathode | Current entry terminal during positive transient | No polarity marking required-cathode notch is non-functional; terminals are electrically symmetric. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or dual-polarity signal lines without external circuitry. |
| 400 W peak power rating | Supports IEC 61000-4-5 Level 4 (4 kV surge) compliance in compact SMA footprint. |
| AEC-Q101 qualified | Validated for automotive under-hood and infotainment applications requiring extended temperature (-65°C to +150°C) and reliability. |
| Flat handling surface | Ensures consistent pick-and-place accuracy in high-speed SMT assembly lines. |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of LDOs and microcontrollers. Use Value: Limits transient voltage to ≤26.0 V, preventing latch-up or gate oxide damage in downstream silicon. | Use Scenario: Shielding 24 V digital input modules from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protector across input terminals before optocoupler or Schmitt trigger. Use Value: Withstands repeated 15.4 A pulses without degradation, ensuring long-term field reliability. |
| Medical Equipment ESD Suppression | AC-DC Adapter Overvoltage Clamp |
Use Scenario: Safeguarding USB and RS-232 ports on diagnostic imaging devices from operator ESD. IC Role / Device Role / Timing Role: Interface-level TVS diode placed adjacent to connector pins. Use Value: 16 kV HBM rating meets IEC 61000-4-2 Level 4, reducing failure-in-service risk. | Use Scenario: Clamping secondary-side rectifier output in offline SMPS to prevent overvoltage during startup or fault. IC Role / Device Role / Timing Role: Secondary-side transient clamp parallel to bulk capacitor. Use Value: 400 W peak power absorbs transformer leakage energy spikes without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZ1SMA16CAT3G | Identical electrical specs; AEC-Q101 certified with PPAP-capable manufacturing site control. | Required for automotive OEM production programs mandating PPAP documentation. | Select SZ prefix when automotive qualification traceability and change control are contractually required. |
| 1.5SMC16CA | Higher 1500 W peak power, larger SMC package (7.1 × 6.2 mm), 27.7 V clamping at 54.3 A. | Suitable for higher-energy surge environments where PCB space allows larger footprint. | Choose 1.5SMC16CA only if system-level surge testing exceeds 400 W and layout permits SMC package. |
Compared with 1SMA16CAT3G, SZ1SMA16CAT3G adds PPAP and site-control rigor without electrical change, while 1.5SMC16CA trades compactness for higher surge capacity-neither is pin-compatible due to differing SMA vs. SMC footprints.
Availability
1SMA16CAT3G is available at Aetrix Electronics and suitable for automotive electronics, industrial programmable logic controllers, and medical diagnostic equipment requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for 1SMA16CAT3G 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The 1SMAxxCAT3G series belongs to onsemi's transient voltage suppressor portfolio, engineered specifically for cost-sensitive, high-reliability DC rail and interface protection where compact size and AEC-Q101 compliance are critical.
FAQ
What is the maximum clamping voltage of the 1SMA16CAT3G under surge conditions?
The 1SMA16CAT3G has a maximum clamping voltage (VC) of 26.0 V when subjected to its rated peak pulse current of 15.4 A, measured using the standard 10/1000 µs double-exponential surge waveform. This value ensures protected downstream components experience no more than 26.0 V during transient events, making it suitable for safeguarding 16 V nominal systems. The 1SMA16CAT3G datasheet specifies this parameter under TA = 25°C with strict test conditions.
Is the 1SMA16CAT3G unidirectional or bidirectional?
The 1SMA16CAT3G is a bidirectional transient voltage suppressor, meaning it provides symmetrical clamping for both positive- and negative-polarity transients. Its Zener-based structure enables identical breakdown behavior in either direction, eliminating the need for polarity-aware placement. Unlike unidirectional variants (e.g., 1SMA16AT3G), the 1SMA16CAT3G has no functional cathode marking-the notch on the SMA package is non-polar.
Does the 1SMA16CAT3G meet automotive qualification standards?
Yes, the 1SMA16CAT3G is AEC-Q101 qualified and PPAP capable when ordered as SZ1SMA16CAT3G. While the base 1SMA16CAT3G shares identical electrical and thermal specifications, the SZ prefix denotes automotive-grade process controls, enhanced traceability, and documented change management. For production automotive use, engineers should specify SZ1SMA16CAT3G to ensure full compliance with OEM requirements.
What is the junction capacitance of the 1SMA16CAT3G and how does it affect signal lines?
The 1SMA16CAT3G exhibits a typical junction capacitance (CJ) of 375 pF at 0 V bias and 1 MHz, as measured per the datasheet. This relatively high capacitance makes it unsuitable for high-speed data lines (e.g., USB 2.0 or HDMI), but appropriate for lower-frequency analog or power rails where bandwidth impact is negligible. For signal integrity preservation, the 1SMA16CAT3G should be placed away from sensitive RF traces and used primarily on DC supplies or slow digital I/O.
Can the 1SMA16CAT3G replace a 1N6267A in an existing design?
No, the 1SMA16CAT3G cannot directly replace the 1N6267A. Although both are 16 V Zener TVS diodes, the 1N6267A is a through-hole DO-15 device rated for 600 W peak power and 33.2 V clamping, whereas the 1SMA16CAT3G is surface-mount SMA with 400 W rating and 26.0 V clamping. Their packages, thermal paths, surge capabilities, and clamping profiles differ significantly-substitution would require layout revision and revalidation of surge performance.
1SMA16CAT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 6-WDFN Exposed Pad
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 375pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TDFN-EP (3x3)
1SMA16CAT3G FAQ
1.How can I place an order for 1SMA16CAT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA16CAT3G 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 1SMA16CAT3G reliable?
The price and inventory of 1SMA16CAT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA16CAT3G is usually 5 days.
3.What payment methods are accepted for 1SMA16CAT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA16CAT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA16CAT3G?
1SMA16CAT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA16CAT3G 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 1SMA16CAT3G?
For technical support, including 1SMA16CAT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA16CAT3G requirements.
6.How does Aetrix verify that 1SMA16CAT3G is sourced from the original manufacturer or authorized distributors?
All 1SMA16CAT3G 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 1SMA16CAT3G meets industry standards.
7.What is the process for return or replacement of 1SMA16CAT3G?
All 1SMA16CAT3G units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA16CAT3G, 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 1SMA16CAT3G part is unused and in its original packaging.
Return procedure for 1SMA16CAT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMA16CAT3G Tags
-
ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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