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Vishay General Semiconductor - Diodes Division SM6T36AHE3_B/I
- Part No.:
- SM6T36AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T36AHE3_B/I.pdf
- Description:
- 600W,36V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,816
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Product details
Overview
SM6T36AHE3_B/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 30.8 V stand-off voltage (VWM), 34.2–37.8 V breakdown voltage (VBR) at 1 mA, 49.9 V max clamping voltage (VC) at 12.0 A peak pulse current, and 600 W peak pulse power (10/1000 μs). It is AEC-Q101 qualified and used to protect automotive sensor signal lines against inductive switching surges.
For engineers reviewing the SM6T36AHE3_B/I datasheet, SM6T36AHE3_B/I pinout, SM6T36AHE3_B/I application, or SM6T36AHE3_B/I equivalent, key selection criteria include unidirectional polarity, clamping performance under 10/1000 μs surge, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a voltage-clamping protection device in series with sensitive downstream circuitry, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage and robust surge handling, while low inductance supports fast response to sub-microsecond transients.
The SMB package enables high-density mounting and meets J-STD-020 MSL Level 1 (260 °C peak reflow), with matte tin-plated leads compliant to JESD 22-B102. Thermal design must account for RθJA = 100 °C/W and derating above TA = 25 °C per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 34.2 V / 37.8 V at IT = 1 mA - Confirmed breakdown range defining turn-on threshold |
| VC @ IPPM | 49.9 V at 12.0 A (10/1000 μs) - Clamped voltage seen by protected IC during worst-case surge |
| PPPM | 600 W - Peak transient energy absorption capability under standardized waveform |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance requiring minimum copper pad area for thermal management |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); recommended pad layout: 5.59 mm × 2.18 mm minimum pad length/width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased anode connection point | Connected to protected line; conducts surge current to ground when VREV > VBR |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against ISO 7637-2 Pulse 1/2a/5a-level transients in 12 V automotive systems |
| AEC-Q101 qualification | Validates reliability for automotive ECUs, ADAS sensors, and body control modules |
| Glass passivated junction | Ensures stable VBR and low leakage (<1 μA at VWM) across temperature and lifetime |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (e.g., load dump, relay bounce) |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in engine control units from inductive switching noise and battery load dump. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and chassis ground, acting as last-line overvoltage defense. Use Value: Limits transient voltage to ≤49.9 V, preventing damage to 3.3 V/5 V interface ICs rated for ≤50 V absolute maximum rating. | Use Scenario: Safeguarding digital input terminals of programmable logic controllers exposed to 24 V DC field wiring with long cable runs and relay-induced spikes. IC Role / Device Role / Timing Role: Standoff-mode protector on 24 V supply rail feeding optocoupler inputs, triggered only during surge events. Use Value: Withstands 100 A IFSM (10 ms half-sine), ensuring survival of repetitive industrial switching surges without degradation. |
| Consumer Power Adapter Input | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side transient suppression on 12 V output rails of AC/DC adapters powering set-top boxes and network routers. IC Role / Device Role / Timing Role: Parallel-connected clamping device across regulated DC output, shunting surge energy away from downstream DC-DC converters. Use Value: 600 W PPPM rating handles EN 61000-4-5 combination wave (1.2/50 μs + 8/20 μs) surges up to 1 kV line-to-ground. | Use Scenario: Front-end protection of Ethernet PHY interfaces and POTS line drivers in base station line cards subjected to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage coarse clamp ahead of precision TVS arrays or GDTs, absorbing bulk surge energy. Use Value: Low clamping voltage (49.9 V) preserves margin for downstream 3.3 V/5 V PHY ICs with 6 V absolute max ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/52 | Same SMB package, 36 V nominal, but lower PPPM (400 W), higher VC (58.1 V at 6.9 A) | Not AEC-Q101 qualified; suitable for commercial-grade consumer/industrial use only | Select when cost sensitivity outweighs automotive qualification and higher clamping voltage is acceptable |
| P6SMB36A | Identical electrical specs and AEC-Q101 qualification, but different packaging code (bulk vs. tape-and-reel I-type) | No functional difference; same PCB footprint and thermal behavior | Select when procurement requires alternate packaging format or distributor-specific availability |
Compared with SMAJ36A-E3/52 and P6SMB36A, SM6T36AHE3_B/I delivers superior surge robustness (600 W vs. 400 W), tighter clamping (49.9 V vs. 58.1 V), and guaranteed AEC-Q101 compliance-making it the preferred choice for automotive signal line protection where reliability and low clamping voltage are critical.
Availability
SM6T36AHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line card designs requiring stable component supply with AEC-Q101 assurance and consistent SMB package form factor.
Supply support for SM6T36AHE3_B/I 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, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, precise clamping, and automated manufacturability are mandatory.
FAQ
What is the polarity configuration of the SM6T36AHE3_B/I?
The SM6T36AHE3_B/I is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the SMB package body, and it conducts only when reverse-biased beyond its breakdown voltage. This configuration makes SM6T36AHE3_B/I appropriate for DC power rail and single-polarity signal line protection, unlike bidirectional variants that require a "CA" suffix.
Does the SM6T36AHE3_B/I meet automotive reliability standards?
Yes, the SM6T36AHE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation (Doc. #88385, Rev. 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating SM6T36AHE3_B/I for under-hood and cabin-mounted automotive electronics.
What is the maximum clamping voltage of the SM6T36AHE3_B/I under standard test conditions?
The SM6T36AHE3_B/I has a maximum clamping voltage (VC) of 49.9 V at 12.0 A peak pulse current with a 10/1000 μs waveform, measured per Figure 1 in the Vishay datasheet. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring compatibility with downstream ICs' absolute maximum ratings.
Can the SM6T36AHE3_B/I be used in place of a bidirectional TVS diode?
No, the SM6T36AHE3_B/I is unidirectional and must not replace bidirectional TVS diodes (e.g., SM6T36CA) in AC-coupled or dual-polarity signal paths. Using SM6T36AHE3_B/I in such applications risks forward conduction during negative half-cycles, leading to malfunction or failure. Always verify polarity alignment before substitution.
What is the thermal resistance specification for the SM6T36AHE3_B/I?
The SM6T36AHE3_B/I 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 standard SMB pad layout; reduced copper area increases thermal impedance and requires derating of power dissipation above TA = 25 °C per Figure 2 in the Vishay datasheet.
SM6T36AHE3_B/I 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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 12A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T36AHE3_B/I FAQ
1.How can I place an order for SM6T36AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T36AHE3_B/I 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 SM6T36AHE3_B/I reliable?
The price and inventory of SM6T36AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T36AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T36AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T36AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T36AHE3_B/I?
SM6T36AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T36AHE3_B/I 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 SM6T36AHE3_B/I?
For technical support, including SM6T36AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T36AHE3_B/I requirements.
6.How does Aetrix verify that SM6T36AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T36AHE3_B/I 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 SM6T36AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T36AHE3_B/I?
All SM6T36AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T36AHE3_B/I, 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 SM6T36AHE3_B/I part is unused and in its original packaging.
Return procedure for SM6T36AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T36AHE3_B/I Tags
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