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onsemi 1SMB13AT3G
- Part No.:
- 1SMB13AT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB13AT3G.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:70,275
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Product details
Overview
1SMB13AT3G from ON Semiconductor is a unidirectional 600 W peak power Zener transient voltage suppressor (TVS) designed for parallel clamping protection of sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a 13 V working peak reverse voltage (VRWM), 15.9 V maximum clamping voltage at 27.9 A peak pulse current (VC @ IPP), and <1.0 ns response time - deployed in power supplies, industrial controls, and automotive ECUs.
For engineers reviewing the 1SMB13AT3G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ circuit operating voltage, VC margin relative to IC absolute maximum ratings, surge current capability under IEC 61000-4-5 waveforms, and UL 497B recognition for isolated loop protection.
Technical Context
This TVS diode operates in avalanche breakdown mode with low dynamic impedance (ZZT ≈ 1.8 Ω typical, derived from ΔV/ΔI across VBR–VC range) and exhibits negligible forward conduction during normal operation due to its unidirectional architecture. Its clamping behavior is defined by the 1 ms 10/1000 µs double-exponential surge waveform per Figure 2 of the datasheet.
Thermal performance is governed by junction-to-lead resistance (RJL = 25 °C/W) and rated for continuous operation from −65 °C to +150 °C. The device meets Class 3 HBM ESD rating (>16 kV) and is UL 497B recognized (File #E210057) for isolated loop circuit protection - critical for telecom and medical isolation barriers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage (VRWM) | 13 V - must be ≥ DC or peak AC operating voltage of protected line to avoid leakage or conduction during normal operation |
| Breakdown Voltage (VBR) @ IT = 1.0 A | 14.4 V min / 15.15 V max - defines onset of avalanche conduction; tight tolerance supports predictable clamping threshold |
| Clamping Voltage (VC) @ IPP = 27.9 A | 21.5 V - maximum voltage seen by downstream IC during 600 W transient; determines required IC overvoltage margin |
| Peak Pulse Power (PPK) | 600 W @ 1 ms - sustains single high-energy transients per IEC 61000-4-5 Level 4 (4 kV line-to-ground) |
| Leakage Current (IR) @ VRWM | 5.0 µA max - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Response Time | < 1.0 ns - enables suppression before fast-edge transients (e.g., ESD) propagate into IC inputs |
| Junction Capacitance (CTYP) | 1160 pF @ 0 V - impacts high-frequency signal integrity; suitable for DC/low-speed lines but not USB/RS-485 |
Pinout & Package
1SMB13AT3G uses the SMB (DO-214AA) surface-mount package (Case 403A), featuring a modified L-bend lead form for enhanced pad adhesion and cathode polarity indicated by a band on the case. Mounting position is unrestricted; maximum soldering temperature is 260 °C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during reverse transient | Connected to protected line; conducts surge current to ground when VRWM exceeded |
| Cathode | Reference terminal / voltage clamp node | Connected to system ground; establishes clamping reference and defines unidirectional polarity |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition (QVGQ2) | Validated for isolated loop protector applications - eliminates need for separate certification testing in telecom/industrial isolators |
| ESD Robustness (HBM Class 3) | >16 kV withstand - protects against human-body ESD events without degradation in field-deployed equipment |
| Low Clamping Ratio (VC/VBR) | ~1.5 - balances fast turn-on and low overshoot; enables tighter design margins vs. higher-ratio alternatives |
| Pb-Free SURMETIC™ Package | RoHS-compliant thermoset plastic with corrosion-resistant finish - supports lead-free reflow and long-term reliability in humid environments |
| Surge Current Rating (IPP) | 27.9 A (10/1000 µs) - exceeds IEC 61000-4-5 Level 3 (2 kV) requirements with margin for aging and layout parasitics |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +24 V rail and chassis ground to clamp transients before they reach DC-DC converter ICs. Use Value: Limits voltage to ≤21.5 V during 27.9 A surge, preventing damage to 36 V-rated input MOSFETs and enabling compliance with IEC 61000-4-5 Level 4. |
Use Scenario: CAN_H line in automotive BCM subjected to ESD and battery disconnect transients per ISO 10605. IC Role / Device Role / Timing Role: Standoff TVS on differential CAN bus, referenced to ground, suppressing common-mode surges while preserving signal integrity. Use Value: Sub-1 ns response prevents >21.5 V overshoot from reaching 3.3 V CAN transceiver inputs, maintaining bit error rate (BER) under stress. |
| Medical Isolated Sensor Interface | Telecom DSL Line Card Surge Protection |
Use Scenario: Analog front-end of patient-connected ECG sensor with reinforced isolation barrier per IEC 60601-1. IC Role / Device Role / Timing Role: UL 497B-recognized TVS on secondary-side analog supply rail to protect ADC and op-amps from coupling transients. Use Value: UL recognition validates use in safety-critical isolated circuits; 5 µA leakage avoids bias current errors in high-gain instrumentation amplifiers. |
Use Scenario: POTS line interface on DSLAM line card exposed to lightning-induced surges per GR-1089-CORE. IC Role / Device Role / Timing Role: Primary-level unidirectional TVS on tip/ring pair, coordinated with gas discharge tube (GDT) for staged protection. Use Value: 600 W peak power handles multi-kA surges; 1160 pF capacitance compatible with ADSL2+ bandwidth when placed upstream of line driver. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A | 400 W peak power; 23.2 V clamping @ 17.3 A; SMA package (smaller footprint, lower thermal mass) | Lower surge handling limits suitability for IEC 61000-4-5 Level 4; preferred where board space is constrained | Select SMAJ13A only if peak surge energy is ≤400 W and PCB layout allows reduced thermal relief. |
| SMCJ13A | 1500 W peak power; 21.5 V clamping @ 70.2 A; SMC package (larger, higher thermal capacity) | Over-spec for most 600 W applications; adds cost and footprint without benefit unless multi-pulse or high-temperature derating required | Choose SMCJ13A only when sustained surge repetition or ambient >75 °C demands higher thermal margin. |
Compared with SMAJ13A, 1SMB13AT3G delivers 50% higher peak power in the same SMB footprint, enabling robust Level 4 compliance without redesign. Against SMCJ13A, it offers identical clamping performance at lower cost and smaller size - optimal for single-pulse, space-constrained industrial designs.
Availability
1SMB13AT3G is available at Aetrix Electronics and suitable for industrial power supplies, automotive control units, and medical sensor interfaces requiring stable component supply, RoHS-compliant packaging, and UL-recognized surge protection.
Supply support for 1SMB13AT3G 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 onsemi) is a global semiconductor supplier specializing in power management, analog, sensors, and connectivity solutions for automotive, industrial, and cloud power applications.
The 1SMB13AT3G belongs to the SMB-series TVS family engineered for high-reliability transient suppression in harsh environments - targeting applications where UL 497B recognition, AEC-Q101 qualification readiness, and 600 W surge resilience are mandatory.
FAQ
What is the maximum clamping voltage of the 1SMB13AT3G under standard test conditions?
The 1SMB13AT3G has a maximum clamping voltage (VC) of 21.5 V when subjected to its rated peak pulse current (IPP) of 27.9 A using the 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during a transient event. Designers must ensure downstream ICs have absolute maximum ratings exceeding 21.5 V to prevent damage. The 1SMB13AT3G datasheet specifies this parameter in Table 1 on page 3.
Is the 1SMB13AT3G suitable for bidirectional signal lines like RS-485 or USB?
No, the 1SMB13AT3G is a unidirectional TVS diode and is not suitable for bidirectional data lines. It conducts only during reverse-biased transients and would short the signal path during normal positive-going signal swings. For RS-485, USB, or other bidirectional interfaces, a symmetric bidirectional TVS such as 1SMB13CAT3G (the complementary bidirectional variant in the same SMB series) must be used instead. The 1SMB13AT3G is intended for DC power rails or unidirectional control lines.
Does the 1SMB13AT3G meet automotive qualification standards?
The 1SMB13AT3G itself is not AEC-Q101 qualified, but the SZ1SMB13AT3G variant - which shares identical electrical specs and SMB package - is explicitly AEC-Q101 qualified and PPAP capable per the datasheet's Features section. For automotive applications requiring formal qualification, designers must specify SZ1SMB13AT3G. The 1SMB13AT3G remains suitable for non-automotive industrial and consumer systems where AEC-Q101 is not mandated.
How does the 1SMB13AT3G's UL 497B recognition benefit system-level certification?
The 1SMB13AT3G carries UL 497B recognition (File #E210057) specifically for "protectors" - meaning it has passed rigorous tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge validation. This recognition allows designers to cite the component directly in end-equipment safety filings (e.g., UL 62368-1), reducing or eliminating the need for additional system-level surge testing on isolated interfaces. The 1SMB13AT3G's UL status is documented on page 6 of its official datasheet.
What is the thermal resistance and derating behavior of the 1SMB13AT3G?
The 1SMB13AT3G has a junction-to-lead thermal resistance (RJL) of 25 °C/W and a junction-to-ambient resistance (RJA) of 226 °C/W on an FR-4 board with ON Semiconductor's recommended footprint. Its DC power dissipation derates linearly above 75 °C (for lead temp) or 25 °C (for ambient), dropping 40 mW/°C and 4.4 mW/°C respectively. These values are specified in the Maximum Ratings table on page 2 of the 1SMB13AT3G datasheet and inform heatsinking and layout decisions for repeated surge events.
1SMB13AT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- 1160pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB13AT3G FAQ
1.How can I place an order for 1SMB13AT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB13AT3G 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 1SMB13AT3G reliable?
The price and inventory of 1SMB13AT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB13AT3G is usually 5 days.
3.What payment methods are accepted for 1SMB13AT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB13AT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB13AT3G?
1SMB13AT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB13AT3G 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 1SMB13AT3G?
For technical support, including 1SMB13AT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB13AT3G requirements.
6.How does Aetrix verify that 1SMB13AT3G is sourced from the original manufacturer or authorized distributors?
All 1SMB13AT3G 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 1SMB13AT3G meets industry standards.
7.What is the process for return or replacement of 1SMB13AT3G?
All 1SMB13AT3G units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB13AT3G, 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 1SMB13AT3G part is unused and in its original packaging.
Return procedure for 1SMB13AT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB13AT3G Tags
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