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onsemi 1SMA60CAT3
- Part No.:
- 1SMA60CAT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA60CAT3.pdf
- Description:
- TVS DIODE 60VWM 96.8VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:7,102
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Product details
Overview
1SMA60CAT3 from ON Semiconductor 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 60 V working peak reverse voltage (VRWM), 96.8 V clamping voltage at 4.1 A peak pulse current, and <1 ns response time. It is used in automotive power supply protection, industrial PLC I/O modules, and medical equipment surge interfaces.
For engineers reviewing the 1SMA60CAT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system operating voltage, clamping voltage margin relative to protected IC VMAX, junction capacitance (110 pF @ 0 V), thermal derating above 75°C, and AEC-Q101 qualification status for automotive deployment.
Technical Context
This device operates as a bidirectional Zener-based TVS diode, leveraging avalanche breakdown to clamp both positive and negative transients. Its low zener impedance ensures stable clamping under fast-rising ESD or lightning-induced surges, and its flat handling surface supports precise automated placement on PCBs.
The SMA package (Case 403D) enables top-slide or bottom-mount assembly with a 260°C/10s soldering tolerance. Thermal resistance from junction-to-lead is 50°C/W, supporting reliable 400 W (1 ms) single-pulse dissipation when mounted on a 1 in² copper pad per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 60 V - Maximum continuous reverse operating voltage before clamping begins; must exceed circuit's peak DC or AC waveform voltage. |
| VBR @ IT | 66.7–73.72 V @ 1 mA - Breakdown voltage range defines turn-on threshold consistency across production lots. |
| VC @ IPP | 96.8 V @ 4.1 A - Clamping voltage during 10/1000 µs surge; determines maximum stress imposed on downstream components. |
| PPK | 400 W @ 1 ms - Peak transient energy absorption capability; validated per R.E.A. 10 × 1000 µs waveform. |
| Junction Capacitance | 110 pF @ 0 V, 1 MHz - Limits use in high-speed data lines (e.g., USB 2.0, CAN FD); acceptable for RS-485 or 100BASE-T1. |
| ESD Rating | Class 3 (>16 kV HBM) - Confirms robustness against human-body model ESD events without degradation. |
| Operating Temp | −65°C to +150°C - Enables deployment in under-hood automotive, industrial enclosures, and medical sterilization environments. |
Pinout & Package
Package: SMA (Case 403D), surface-mount, bidirectional, cathode polarity indicated by band marking. 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 | Transient current sink (negative half-cycle) | Connects to line being protected; conducts during negative surges to ground or rail. |
| Cathode | Transient current sink (positive half-cycle) | Marked with band; conducts during positive surges to ground or rail; symmetrical conduction in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or floating signal paths (e.g., RS-485 differential pairs) without polarity constraints. |
| Flat handling surface | Enables consistent pick-and-place accuracy and coplanarity control during reflow, reducing tombstoning risk. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring zero-failure reliability. |
| Pb-free SURMETIC® package | RoHS-compliant molding compound with corrosion-resistant terminations and solderability verified per J-STD-002. |
| Low profile (≤2.2 mm height) | Supports ultra-thin designs in portable medical monitors and space-constrained industrial gateways. |
Applications
| Automotive Power Rail Protection | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: Suppresses load-dump transients (up to 120 V, 400 ms) on 12 V battery-fed ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between power rail and chassis ground to clamp both positive and negative spikes. Use Value: Maintains 96.8 V clamping level below 100 V absolute max rating of typical automotive LDOs and microcontrollers. |
Use Scenario: Shields 4–20 mA current loop inputs from field wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff device mounted at connector entry point to divert >1 kV transients before reaching precision ADC front-end. Use Value: 400 W peak power rating handles repetitive surges per IEC 61000-4-5 Level 3 (2 kV line-earth), preserving measurement integrity. |
| Medical Equipment ESD Interface | Telecom Power Supply Clamp |
|
Use Scenario: Protects USB-C and auxiliary ports on diagnostic imaging devices from hospital-grade ESD events. IC Role / Device Role / Timing Role: Bidirectional shunt element tied between signal pair and local ground plane. Use Value: 16 kV HBM rating exceeds IEC 61000-4-2 Level 4 requirement, ensuring no latch-up or parametric shift after repeated discharges. |
Use Scenario: Clamps overvoltage on −48 V telecom rectifier outputs caused by lightning-induced coupling on long feeder lines. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC converters and hot-swap controllers. Use Value: 110 pF junction capacitance avoids destabilizing −48 V output regulation loops while providing 96.8 V clamping ceiling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZ1SMA60CAT3G | Identical electrical specs; includes SZ prefix denoting AEC-Q101 compliance with PPAP documentation support. | Required for Tier 1 automotive BOMs where full PPAP submission is mandated. | Select SZ1SMA60CAT3G when automotive OEM qualification and change control traceability are contractually required. |
| 1SMA60AT3G | Unidirectional version; same VRWM, VBR, VC, but only clamps positive transients (anode grounded). | Suitable only for DC-biased rails with known polarity; not usable on AC or floating lines. | Choose 1SMA60AT3G only if circuit topology guarantees unidirectional surge direction and grounding scheme permits anode-to-ground connection. |
Compared with 1SMA60CAT3, SZ1SMA60CAT3G adds formal PPAP readiness and site-specific control for automotive programs, while 1SMA60AT3G trades bidirectionality for slightly lower leakage in unidirectional DC systems-neither is pin-compatible without verifying layout adaptation for polarity and grounding.
Availability
1SMA60CAT3 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC analog input protection, and medical equipment ESD interface applications requiring stable component supply and long-term lifecycle assurance.
Supply support for 1SMA60CAT3 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 is a global semiconductor manufacturer specializing in power management, analog, sensor, and discrete solutions for automotive, industrial, and communications markets.
The 1SMAxxCAT3G series belongs to ON Semiconductor's high-reliability transient voltage suppressor product line, engineered specifically for robust surge immunity in harsh electromagnetic environments with AEC-Q101 validation and SURMETIC® packaging.
FAQ
What is the clamping voltage of the 1SMA60CAT3 under a standard 10/1000 µs surge?
The 1SMA60CAT3 clamps to 96.8 V at a peak pulse current (IPP) of 4.1 A under the standardized 10/1000 µs waveform defined by R.E.A. This value is measured at TA = 25°C and represents the maximum voltage seen by protected circuitry during surge conduction. The 1SMA60CAT3 maintains this clamping performance across its rated operating temperature range when properly mounted on a thermally adequate PCB pad.
Is the 1SMA60CAT3 suitable for automotive applications?
Yes, the 1SMA60CAT3 meets AEC-Q101 requirements for stress testing and reliability, and is explicitly listed in ON Semiconductor's automotive-qualified portfolio. While the base 1SMA60CAT3 part is qualified, the SZ1SMA60CAT3G variant provides additional PPAP documentation and site-specific control tracking required by Tier 1 automotive suppliers. Both share identical electrical characteristics and thermal performance.
How does the bidirectional design of the 1SMA60CAT3 affect its circuit implementation?
The 1SMA60CAT3 has no inherent polarity-it conducts equally on positive and negative transients, making it ideal for AC-coupled lines, differential buses, or floating grounds. Unlike unidirectional TVS diodes, it requires no dedicated anode-to-ground or cathode-to-ground orientation. In practice, the 1SMA60CAT3 is placed across the protected node and reference plane (e.g., signal-to-ground or rail-to-ground), with the band-marked cathode serving only as a visual aid-not a functional polarity indicator.
What is the thermal derating behavior of the 1SMA60CAT3 above 75°C ambient?
The 1SMA60CAT3 derates linearly above 75°C ambient: its DC power dissipation drops by 20 mW/°C, resulting in 0.5 W maximum at 25°C and 0 W at 100°C. For transient operation, Figure 3 in the datasheet shows 10×1000 µs pulse capability falls to ~70% of rated 400 W at 100°C ambient. Effective thermal management-such as using a 1 in² copper pad-extends usable surge capacity in elevated-temperature environments.
Can the 1SMA60CAT3 be used in high-speed data lines like USB or Ethernet?
The 1SMA60CAT3 exhibits 110 pF junction capacitance at 0 V bias, which is too high for USB 2.0 (max ~5 pF) or 100BASE-TX Ethernet (max ~2 pF). It is appropriate for lower-speed interfaces such as RS-232, RS-485, or CAN bus where capacitance up to 200 pF is tolerable. For high-speed lines, consider specialized low-capacitance TVS arrays or integrated ESD protection ICs instead of the 1SMA60CAT3.
1SMA60CAT3 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):
- 60V
- Voltage - Breakdown (Min):
- 66.7V
- Voltage - Clamping (Max) @ Ipp:
- 96.8V
- Current - Peak Pulse (10/1000µs):
- 4.1A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 110pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
1SMA60CAT3 FAQ
1.How can I place an order for 1SMA60CAT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA60CAT3 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 1SMA60CAT3 reliable?
The price and inventory of 1SMA60CAT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA60CAT3 is usually 5 days.
3.What payment methods are accepted for 1SMA60CAT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA60CAT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA60CAT3?
1SMA60CAT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA60CAT3 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 1SMA60CAT3?
For technical support, including 1SMA60CAT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA60CAT3 requirements.
6.How does Aetrix verify that 1SMA60CAT3 is sourced from the original manufacturer or authorized distributors?
All 1SMA60CAT3 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 1SMA60CAT3 meets industry standards.
7.What is the process for return or replacement of 1SMA60CAT3?
All 1SMA60CAT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA60CAT3, 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 1SMA60CAT3 part is unused and in its original packaging.
Return procedure for 1SMA60CAT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMA60CAT3 Tags
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