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Vishay General Semiconductor - Diodes Division SM6T39AHM3_A/H
- Part No.:
- SM6T39AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T39AHM3_A/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,784
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Product details
Overview
SM6T39AHM3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, with 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR at 1 mA), and 53.9 V clamping voltage (VC) at 11.1 A peak pulse current. It delivers 600 W peak pulse power (10/1000 μs), supports automotive-grade reliability (AEC-Q101 qualified), and protects MOSFETs and sensor signal lines in automotive ECUs.
For engineers reviewing the SM6T39AHM3_A/H datasheet, SM6T39AHM3_A/H pinout, SM6T39AHM3_A/H application, or SM6T39AHM3_A/H equivalent, key selection criteria include clamping performance under 10/1000 μs transients, unidirectional polarity for DC rail protection, AEC-Q101 qualification status, SMB footprint compatibility, and thermal resistance (RθJA = 100 °C/W).
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to respond to fast-rising voltage transients. Its design targets suppression of inductive switching spikes and ESD events on low-voltage DC rails, with specified operation from −65 °C to +150 °C junction temperature.
The device meets J-STD-020 MSL Level 1 (260 °C peak reflow), uses matte tin-plated leads, and is halogen-free and RoHS-compliant. Its SMB package enables automated placement and provides low inductance for effective high-speed transient response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 53.9 V at 11.1 A (10/1000 μs) - Clamped voltage seen by protected circuit; limits stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; sustains standardized lightning/surge waveforms without failure. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient; informs derating requirements on standard PCB pads (0.2" × 0.2"). |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); recommended pad layout per Vishay spec.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-potential node; completes clamping path during transient events. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 24 V supply rail); marked with band; conducts when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, body modules, and ADAS sensors. |
| 600 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge test profiles without degradation. |
| Glass passivated junction | Ensures stable leakage current (<1 μA at VWM) and long-term reliability under thermal cycling. |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (e.g., <10 ns rise time), improving clamping fidelity. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units against load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between rail and ground to limit transient overvoltage. Use Value: Limits clamped voltage to 53.9 V, preventing damage to 36 V-rated power management ICs and microcontrollers. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across signal and return to shunt fast transients before reaching ADC front-end. Use Value: Sub-100 pF junction capacitance (typ.) avoids signal integrity degradation at ≤1 MHz bandwidth. |
| Consumer Power Adapter Input Protection | Telecom DC Feeder Line Surge Suppression |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Standoff-rated TVS on regulated 5–20 V output rails to absorb coupling transients from primary side. Use Value: 33.3 V VWM allows safe operation across full USB PD profile while clamping surges to ≤54 V. | Use Scenario: DC power feeding lines (−48 V) in base station remote radio units exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on negative rail to clamp positive-going transients relative to system ground. Use Value: 600 W rating handles IEC 61000-4-5 Combination Wave (10/700 μs) up to 4 kV with 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 |
|---|---|---|---|
| SMAJ33A-E3/57 | Same SMB package, 33 V VWM, but lower PPPM = 400 W; non-AEC-Q101 rated. | Commercial-grade only; unsuitable for automotive under-hood deployment. | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin. |
| SMCJ33A-QH | Higher PPPM = 1500 W, same VWM/VC, but larger SMC (DO-214AB) package. | Requires PCB layout change; used where higher surge immunity is mandated (e.g., industrial motor drives). | Choose when system-level surge testing exceeds 600 W requirements and board space permits SMC footprint. |
Compared with SMAJ33A-E3/57 and SMCJ33A-QH, the SM6T39AHM3_A/H uniquely balances AEC-Q101 compliance, 600 W capability, and SMB footprint-making it optimal for space-constrained automotive modules requiring validated reliability without layout redesign.
Availability
SM6T39AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power feeders requiring stable component supply with guaranteed AEC-Q101 qualification and halogen-free compliance.
Supply support for SM6T39AHM3_A/H 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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SM6T Series was engineered for robust transient suppression in harsh environments-including automotive, industrial, and telecom-where consistent clamping behavior, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the SM6T39AHM3_A/H under a 10/1000 μs transient?
The SM6T39AHM3_A/H has a maximum clamping voltage (VC) of 53.9 V at 11.1 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88385 and defines the upper voltage limit imposed on protected circuits during standardized surge events. The SM6T39AHM3_A/H maintains this clamping performance across its qualified temperature range.
Is the SM6T39AHM3_A/H suitable for automotive applications?
Yes, the SM6T39AHM3_A/H is AEC-Q101 qualified, halogen-free, and RoHS-compliant-meeting critical requirements for automotive electronics. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and operation from −65 °C to +150 °C. The SM6T39AHM3_A/H is explicitly designated for use in engine control, body electronics, and ADAS systems per Vishay's ordering nomenclature (HM3 suffix + A/H revision).
What does the "HM3" suffix indicate in SM6T39AHM3_A/H?
The "HM3" suffix in SM6T39AHM3_A/H denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms compliance with automotive reliability standards. The "A/H" revision code indicates the specific manufacturing revision level per Vishay's internal documentation control, as referenced in document 88385.
How does the SM6T39AHM3_A/H compare to bidirectional TVS diodes?
The SM6T39AHM3_A/H is unidirectional and intended for DC rail protection where polarity is fixed (e.g., +24 V supply to ground). Unlike bidirectional types (e.g., SM6T39CA), it does not conduct in forward bias beyond ~1 V, enabling tighter VWM margin and lower leakage. The SM6T39AHM3_A/H must be oriented with cathode toward the protected line and anode to ground-reversal would prevent clamping.
What is the thermal resistance of the SM6T39AHM3_A/H, and how does it affect PCB layout?
The SM6T39AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces RθJA. For sustained power dissipation, the SM6T39AHM3_A/H requires adherence to Vishay's recommended pad layout to avoid exceeding TJ = 150 °C under worst-case ambient conditions.
SM6T39AHM3_A/H 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 11.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T39AHM3_A/H FAQ
1.How can I place an order for SM6T39AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T39AHM3_A/H 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 SM6T39AHM3_A/H reliable?
The price and inventory of SM6T39AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T39AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM6T39AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T39AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T39AHM3_A/H?
SM6T39AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T39AHM3_A/H 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 SM6T39AHM3_A/H?
For technical support, including SM6T39AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T39AHM3_A/H requirements.
6.How does Aetrix verify that SM6T39AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T39AHM3_A/H 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 SM6T39AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM6T39AHM3_A/H?
All SM6T39AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T39AHM3_A/H, 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 SM6T39AHM3_A/H part is unused and in its original packaging.
Return procedure for SM6T39AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T39AHM3_A/H Tags
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