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onsemi 1SMB13CAT3
- Part No.:
- 1SMB13CAT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB13CAT3.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:7,913
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Product details
Overview
1SMB13CAT3 from ON Semiconductor is a bidirectional 600 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of sensitive electronics. It features a 13 V working peak reverse voltage (VRWM), 15.16 V nominal Zener breakdown voltage (VBR) at 1.0 mA, and clamps to 21.5 V at 27.9 A peak pulse current - enabling robust surge suppression in power rails and I/O lines.
For engineers reviewing the 1SMB13CAT3 datasheet, pinout, applications, or equivalent options, this device is selected for high-energy transient immunity in automotive ECUs, industrial power supplies, and communication interface protection where sub-1 ns response time, UL 497B recognition, and low leakage (<5 µA @ 13 V) are critical design requirements.
Technical Context
The 1SMB13CAT3 operates as a bidirectional avalanche diode, conducting symmetrically in both polarities above its breakdown threshold. Its clamping action begins within <1 ns of transient onset, with junction-to-lead thermal resistance of 40 °C/W enabling effective 600 W (1 ms) pulse dissipation at TL = 25°C.
It is rated for –65°C to +150°C operating temperature and complies with UL 497B for isolated loop circuit protection. The device uses a void-free Surmetic™ plastic package (DO-214AA, Case 403A) with modified L-bend leads optimized for solderability and PCB bond strength.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 13 V - maximum continuous reverse voltage before clamping; sets minimum system operating voltage compatibility |
| VBR (min/typ/max) | 14.4 V / 15.16 V / 15.9 V @ 1.0 mA - defines precise conduction onset for predictable overvoltage thresholding |
| VC @ IPP | 21.5 V @ 27.9 A - clamped voltage during 600 W transient; determines protected circuit's worst-case overvoltage stress |
| IPP | 27.9 A - peak pulse current capability under 10/1000 µs waveform; quantifies surge energy handling capacity |
| Leakage Current | <5 µA @ VRWM - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Response Time | <1 ns - enables suppression of fast-rising ESD and lightning-induced transients before downstream damage occurs |
| ESD Rating | Class 3 (>16 kV HBM) - meets stringent electrostatic discharge immunity requirements for end-user interfaces |
Pinout & Package
Package: DO-214AA (SMB), molded thermosetting plastic case per ON Semiconductor Case 403A–03; dimensions: 4.06 × 3.30 × 2.11 mm (L × W × H); polarity band not indicated (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode for negative transients) | Clamping terminal (bidirectional) | Conducts during positive or negative overvoltage events; connects across protected line and ground/reference |
| Anode (Cathode for negative transients) | Clamping terminal (bidirectional) | Completes symmetrical avalanche path; no polarity marking required due to bidirectional construction |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or dual-polarity DC lines without external polarity management |
| UL 497B recognition | Validated for isolated loop circuit protection - satisfies safety compliance in telecom and industrial control systems |
| Surmetic™ package | Void-free transfer-molded construction ensures long-term reliability under thermal cycling and humidity exposure |
| Modified L-bend leads | Increases solder joint contact area and mechanical strength - improves board-level robustness in vibration-prone environments |
| Low zener impedance | Minimizes voltage overshoot during fast transients by sustaining stable clamping performance across wide current range |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between VCC and GND to clamp surges exceeding 13 V while maintaining low leakage during normal operation. Use Value: Limits peak rail voltage to 21.5 V under 27.9 A surge, preventing brownout or latch-up in MCU and peripheral ICs. | Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on each input channel, referenced to common ground, responding in <1 ns. Use Value: Maintains signal integrity by suppressing >16 kV HBM ESD and 600 W lightning surges without degrading 24 V logic thresholds. |
| Medical Equipment Signal Line Guarding | Telecom Interface Surge Suppression |
Use Scenario: Safeguarding analog sensor inputs (e.g., ECG front-end) connected to patient-facing connectors exposed to ESD and defibrillation pulses. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA) bidirectional TVS placed at connector entry point to shunt transients before signal conditioning stages. Use Value: Prevents amplifier saturation and data corruption while preserving DC accuracy via negligible standby current draw. | Use Scenario: Protecting RS-485 transceiver pins in base station backhaul modules from induced surges on long cable runs. IC Role / Device Role / Timing Role: Differential-line TVS pair (one per line) referenced to local ground, leveraging symmetric clamping behavior. Use Value: Ensures interoperability with UL 497B-compliant isolation barriers and withstands repeated 10/1000 µs surges up to 600 W. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13CA | Same VRWM (13 V), identical DO-214AA package, but lower PPK = 600 W (same rating); slightly higher VC = 21.5 V vs. 21.5 V (identical) | No functional difference in clamping or footprint; SMBJ series has broader industry adoption and longer production history | Preferred when sourcing stability and second-source assurance are prioritized over latest preferred-device status |
| 1.5SMC13CA | Higher PPK = 1500 W, larger SMC (DO-214AB) package (7.11 × 6.22 mm), same VRWM and VBR tolerances | Used where higher surge margin is required and PCB space allows larger footprint; not drop-in compatible due to size and thermal pad layout | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 and 600 W is insufficient |
Compared with SMBJ13CA and 1.5SMC13CA, the 1SMB13CAT3 offers identical electrical protection performance in a cost-optimized Surmetic™ SMB package with UL 497B recognition - making it ideal for high-volume automotive and industrial designs where footprint, reliability, and safety certification are jointly critical.
Availability
1SMB13CAT3 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, medical sensor interfaces, and telecom infrastructure requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for 1SMB13CAT3 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 management, analog, sensing, and connectivity solutions.
The 1SMB13CAT3 belongs to the SMB-series transient voltage suppressor family, engineered specifically for high-reliability, surface-mount overvoltage protection in harsh environments including automotive, industrial, and medical systems.
FAQ
What is the clamping voltage of the 1SMB13CAT3 under maximum surge conditions?
The 1SMB13CAT3 clamps to 21.5 V when subjected to its rated peak pulse current of 27.9 A (10/1000 µs waveform). This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The 1SMB13CAT3 maintains this clamping performance consistently due to its low zener impedance and thermally robust Surmetic™ package.
Is the 1SMB13CAT3 unidirectional or bidirectional, and how does that affect circuit placement?
The 1SMB13CAT3 is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients without polarity sensitivity. This allows direct placement across any two nodes - such as power-to-ground or differential signal lines - without regard to orientation. No polarity band is marked on the 1SMB13CAT3 package, confirming its bidirectional functionality.
Does the 1SMB13CAT3 meet UL safety standards, and which specific standard applies?
Yes, the 1SMB13CAT3 is UL Recognized under UL 497B (File #116110) for protectors in isolated loop circuits. This certification covers rigorous testing including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - validating its use in safety-critical telecom and industrial applications where regulatory compliance is mandatory.
What is the maximum operating temperature range for the 1SMB13CAT3?
The 1SMB13CAT3 is rated for an operating and storage temperature range of –65°C to +150°C. This wide range supports deployment in under-hood automotive modules, industrial motor drives, and outdoor telecom equipment. Its thermal resistance from junction to lead is 40 °C/W, enabling reliable 600 W pulse handling at lead temperatures up to 25°C - with derating applied above that threshold.
How does the 1SMB13CAT3 compare to the 1SMB10CAT3 in terms of voltage ratings and application suitability?
The 1SMB13CAT3 has a higher working peak reverse voltage (13 V vs. 10 V) and nominal breakdown voltage (15.16 V vs. 11.69 V) than the 1SMB10CAT3, making it suitable for 12 V nominal systems with tighter tolerance margins. Both share identical 600 W peak power, <1 ns response, and UL 497B certification - but the 1SMB13CAT3 avoids premature conduction in systems with higher steady-state ripple or tolerance stack-up.
1SMB13CAT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 27.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 630pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB13CAT3 FAQ
1.How can I place an order for 1SMB13CAT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB13CAT3 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 1SMB13CAT3 reliable?
The price and inventory of 1SMB13CAT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB13CAT3 is usually 5 days.
3.What payment methods are accepted for 1SMB13CAT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB13CAT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB13CAT3?
1SMB13CAT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB13CAT3 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 1SMB13CAT3?
For technical support, including 1SMB13CAT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB13CAT3 requirements.
6.How does Aetrix verify that 1SMB13CAT3 is sourced from the original manufacturer or authorized distributors?
All 1SMB13CAT3 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 1SMB13CAT3 meets industry standards.
7.What is the process for return or replacement of 1SMB13CAT3?
All 1SMB13CAT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB13CAT3, 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 1SMB13CAT3 part is unused and in its original packaging.
Return procedure for 1SMB13CAT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB13CAT3 Tags
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