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Vishay General Semiconductor - Diodes Division SM6T100A-E3/5B
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- Part No.:
- SM6T100A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T100A-E3/5B.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,096
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Product details
Overview
SM6T100A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 100 V standoff voltage (VWM = 85.5 V), 137 V clamping voltage (VC) at 4.4 A peak pulse current, 600 W peak pulse power (10/1000 μs), and SMB (DO-214AA) surface-mount package - deployed to safeguard MOSFETs and sensor interfaces in automotive ECUs.
For engineers reviewing the SM6T100A-E3/5B datasheet, SM6T100A-E3/5B pinout, SM6T100A-E3/5B application, or SM6T100A-E3/5B equivalent, key selection criteria include verified unidirectional polarity, clamping performance under 10/1000 μs transients, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification eligibility via HE3 suffix variants, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds its breakdown threshold (VBR = 95–105 V), it avalanches to divert surge current away from downstream circuitry. Its low-inductance SMB package and glass-passivated junction ensure fast response (<1 ns) and stable clamping under repetitive transients.
Designed for unidirectional operation, SM6T100A-E3/5B exhibits 1.0 μA max reverse leakage at 85.5 V, supports 100 A non-repetitive forward surge (IFSM), and maintains safe operation across –65 °C to +150 °C junction temperature range - validated per J-STD-020 MSL Level 1 (260 °C reflow peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85.5 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 95.0 / 105 V - guaranteed avalanche onset range at 1.0 mA test current |
| VC @ IPPM | 137 V at 4.4 A (10/1000 μs) - peak clamped voltage limiting stress on protected ICs |
| PPPM | 600 W - surge energy handling capacity under standardized lightning-like waveform |
| RθJA | 100 °C/W - thermal resistance defining junction-to-ambient temperature rise at 5.0 W dissipation |
| Package | SMB (DO-214AA) - 3.94 mm × 2.20 mm footprint, matte tin-plated leads, RoHS-compliant |
| Polarity | Unidirectional - cathode marked by band; blocks forward current until VBR exceeded in reverse |
Pinout & Package
SMB (DO-214AA) package: surface-mount, molded plastic case with cathode band marking; terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to lower-potential side of protected line; enables DC blocking in normal operation |
| Cathode | Current exit during reverse avalanche | Banded end; connected to higher-potential side; provides low-impedance path to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables reliable suppression of IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (<1 ns response), critical for MOSFET gate protection |
| MSL Level 1 rating | Allows single-reflow assembly without moisture sensitivity concerns (peak 260 °C) |
| AEC-Q101 qualification path | Supports automotive-grade sourcing via HE3/HM3 suffix variants with full stress-test validation |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power rails from load-dump transients up to 35 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VCC and GND, clamping spikes within 137 V to prevent MCU brownout or latch-up. Use Value: Withstands 600 W surges while maintaining <1.0 μA leakage at 85.5 V, ensuring minimal standby current drain in always-on modules. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory-floor pressure sensors exposed to ESD and relay-switching noise. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; SM6T100A-E3/5B serves as unidirectional clamp on supply-side rail only. Use Value: 137 V clamping ensures sensor ICs rated for 120 V absolute max remain within safe operating area during 10/1000 μs surges. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Front-end protection of PoE-powered Ethernet switches against lightning-induced common-mode surges on data pairs. IC Role / Device Role / Timing Role: Paired with gas discharge tube (GDT) in hybrid protection network; SM6T100A-E3/5B handles fast-rising edge (<100 ns) before GDT fires. Use Value: Low RθJA (100 °C/W) and 150 °C max junction temperature allow sustained operation in enclosed chassis with limited airflow. | Use Scenario: Secondary-side overvoltage clamp in AC/DC adapters after rectification, guarding against transformer flyback spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor to clamp residual switching transients exceeding 85.5 V. Use Value: SMB package enables high-density layout; 0.106 g unit weight supports lightweight adapter design without compromising surge margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A | Same SMB package, 100 V VWM, but lower PPPM (400 W); VC = 165 V @ 3.0 A | Lower surge margin; less suitable for IEC 61000-4-5 Level 4 compliance | Select SMAJ100A only if system-level testing confirms 400 W suffices and layout allows higher clamping voltage |
| 1.5SMC100A | Higher-power SMC package (1500 W PPPM), same VWM/VC specs, larger footprint (7.11 mm × 6.22 mm) | Requires PCB redesign; better for high-energy industrial surges where space permits | Choose 1.5SMC100A when surge threat level exceeds 600 W and thermal budget allows larger thermal mass |
Compared with SMAJ100A and 1.5SMC100A, SM6T100A-E3/5B delivers optimal balance of 600 W surge capability, compact SMB footprint, and 137 V clamping - making it preferred for space-constrained automotive and telecom designs requiring validated AEC-Q101 readiness via HE3 variants.
Availability
SM6T100A-E3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom line cards, and consumer power adapters requiring stable component supply and RoHS-compliant manufacturing.
Supply support for SM6T100A-E3/5B 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SM6T Series is engineered specifically for transient voltage suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against inductive switching, ESD, and lightning surges is mission-critical.
FAQ
What is the clamping voltage of SM6T100A-E3/5B under a 10/1000 μs surge?
The SM6T100A-E3/5B has a maximum clamping voltage (VC) of 137 V when subjected to a 4.4 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6T100A-E3/5B maintains this clamping performance consistently due to its glass-passivated junction and low-inductance SMB package.
Is SM6T100A-E3/5B suitable for automotive applications?
Yes, SM6T100A-E3/5B is qualified for automotive use when ordered with the HE3 or HM3 suffix (e.g., SM6T100AHE3_B), which denotes full AEC-Q101 qualification. While the SM6T100A-E3/5B itself is commercial-grade RoHS-compliant, its construction - including MSL Level 1 rating, 150 °C max junction temperature, and robust surge handling - aligns with automotive environmental requirements. System designers should specify the HE3 variant explicitly for production automotive programs.
What does the "-E3/5B" suffix indicate in SM6T100A-E3/5B?
The "-E3/5B" suffix in SM6T100A-E3/5B specifies two attributes: "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "5B" indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This format supports high-volume automated SMT assembly and is distinct from the "52" code (7-inch reel, 750 units). The SM6T100A-E3/5B is not AEC-Q101 qualified - that requires the HE3 suffix.
How does SM6T100A-E3/5B differ from bidirectional TVS diodes like SM6T100CA?
SM6T100A-E3/5B is unidirectional and features a cathode band for polarity identification, whereas SM6T100CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The SM6T100A-E3/5B conducts only in reverse avalanche and blocks forward current up to its VBR, making it ideal for DC rail protection. In contrast, SM6T100CA is used in AC or floating signal lines where voltage polarity reverses. Their electrical specs (VWM, VBR, VC) are identical, but circuit integration differs fundamentally.
What is the thermal resistance of SM6T100A-E3/5B, and how does it affect layout?
The SM6T100A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads per terminal. This value means each watt of steady-state power dissipation raises the junction temperature by 100 °C above ambient. For reliable operation, layouts must provide adequate copper area and avoid thermal bottlenecks - especially important since the SM6T100A-E3/5B may experience brief high-power surges. Derating applies above TA = 25 °C per Figure 2 in the datasheet.
SM6T100A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 85.5V
- Voltage - Breakdown (Min):
- 95V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T100A-E3/5B FAQ
1.How can I place an order for SM6T100A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T100A-E3/5B 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 SM6T100A-E3/5B reliable?
The price and inventory of SM6T100A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T100A-E3/5B is usually 5 days.
3.What payment methods are accepted for SM6T100A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T100A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T100A-E3/5B?
SM6T100A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T100A-E3/5B 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 SM6T100A-E3/5B?
For technical support, including SM6T100A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T100A-E3/5B requirements.
6.How does Aetrix verify that SM6T100A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T100A-E3/5B 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 SM6T100A-E3/5B meets industry standards.
7.What is the process for return or replacement of SM6T100A-E3/5B?
All SM6T100A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T100A-E3/5B, 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 SM6T100A-E3/5B part is unused and in its original packaging.
Return procedure for SM6T100A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T100A-E3/5B Tags
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