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Vishay General Semiconductor - Diodes Division SM6T27AHE3/5B
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- Part No.:
- SM6T27AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27AHE3/5B.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,117
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Product details
Overview
SM6T27AHE3/5B 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 23.1 V stand-off voltage (VWM), 25.7–28.4 V breakdown voltage (VBR) at 1 mA, 37.5 V maximum clamping voltage (VC) at 16 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform. It is AEC-Q101 qualified and RoHS-compliant, used for protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial electronics.
For engineers reviewing the SM6T27AHE3/5B datasheet, SM6T27AHE3/5B pinout, SM6T27AHE3/5B application, or SM6T27AHE3/5B equivalent, key selection criteria include unidirectional polarity, clamping performance under 10/1000 μs surge, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and compatibility with automated SMT placement on standard SMB footprints.
Technical Context
The SM6T27AHE3/5B operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its specified VBR range (25.7–28.4 V). Its low-inductance SMB package enables fast response to ESD and lightning-induced transients, with clamping action limiting downstream voltage to ≤37.5 V at 16 A IPPM.
It is rated for 150 °C maximum junction temperature, derated above 25 °C ambient per Fig. 2, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. The cathode band denotes polarity, and it is not intended for bidirectional use-bidirectional variants require "CA" suffix (e.g., SM6T27CA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe DC bias margin. |
| VBR @ IT = 1 mA | 25.7–28.4 V - Breakdown threshold range; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM = 16 A (10/1000 μs) | 37.5 V - Clamped voltage under standardized surge; determines protected circuit's maximum stress level. |
| PPPM | 600 W - Peak pulse power handling capability; validates robustness against IEC 61000-4-5 Level 4 surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; informs PCB copper pad sizing for thermal management. |
| TJ max. | 150 °C - Maximum allowable junction temperature; sets upper limit for ambient + self-heating design margin. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, UL 94 V-0 molding compound, MSL Level 1, 260 °C peak reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; defines unidirectional conduction path. |
| Cathode | Forward current exit / Surge current sink | Marked by band; ties to higher-potential rail or ground return to shunt transient energy. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Validates immunity to high-energy transients per IEC 61000-4-5, enabling use in harsh automotive load-dump environments. |
| AEC-Q101 qualified | Confirms reliability for automotive electronics including engine control units, body modules, and ADAS sensor interfaces. |
| Glass passivated chip junction | Enhances long-term stability and moisture resistance, critical for industrial and outdoor deployment. |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving clamping fidelity. |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 24 V supply rails in vehicle ECUs from load-dump transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC input stage. Use Value: Limits voltage seen by downstream regulators to ≤37.5 V during 600 W surges, preventing latch-up or destruction. | Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and switching noise in factory automation. IC Role / Device Role / Timing Role: Point-of-entry protection on 0–5 V or 4–20 mA signal paths before ADC input. Use Value: Maintains signal integrity by clamping sub-100 ns ESD events without adding capacitance that degrades bandwidth. |
| Consumer Power Adapter Input Stage | Telecom Equipment DC Feeds |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier outputs against surge coupling from mains. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor to absorb line-to-line transients. Use Value: Absorbs 600 W pulses without degradation, extending capacitor life and avoiding secondary failure modes. | Use Scenario: Protecting -48 V DC distribution in telecom base stations from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Cathode-to-rail configuration on negative supply to clamp positive-going transients. Use Value: Enables compliance with GR-1089-CORE surge immunity requirements while maintaining low standby leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Same SMB package, 24 V VWM, 26.7–29.5 V VBR, 38.9 V VC @ 15.4 A; 400 W PPPM. | Limited to 400 W surge handling; less robust for automotive load-dump. | Select SMAJ24A only where lower-cost, non-AEC-Q101 qualification is acceptable and surge energy is <400 W. |
| SMCJ24A | Same VWM/VBR range but in larger SMC (DO-214AB) package; 1500 W PPPM, RθJA = 35 °C/W. | Requires larger PCB footprint and higher thermal mass; suited for higher-power industrial systems. | Choose SMCJ24A when system-level surge testing exceeds 600 W or when board layout allows SMC footprint and improved thermal dissipation. |
Compared with SMAJ24A and SMCJ24A, SM6T27AHE3/5B delivers balanced surge robustness (600 W), AEC-Q101 qualification, and SMB footprint efficiency-making it optimal for space-constrained automotive and industrial designs requiring validated reliability without over-engineering.
Availability
SM6T27AHE3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC feed surge suppression requiring stable component supply and traceable sourcing.
Supply support for SM6T27AHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SM6T Series is engineered for high-reliability transient suppression in automotive, industrial, and telecom infrastructure, combining AEC-Q101 qualification, low-inductance packaging, and precise clamping characteristics for robust system-level ESD and surge immunity.
FAQ
What is the polarity configuration of SM6T27AHE3/5B?
The SM6T27AHE3/5B is a unidirectional TVS diode, with the cathode identified by a visible band on the SMB package. It conducts only in reverse-bias mode during overvoltage events and must be oriented with cathode toward the higher-potential side of the protected line. Bidirectional operation requires the CA-suffixed variant (e.g., SM6T27CA), which is not interchangeable with SM6T27AHE3/5B.
Is SM6T27AHE3/5B qualified for automotive applications?
Yes, SM6T27AHE3/5B is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This certification confirms its suitability for automotive electronic systems including engine control, body electronics, and ADAS sensors, having passed stress tests for temperature cycling, humidity, mechanical shock, and accelerated life under bias.
What is the maximum clamping voltage of SM6T27AHE3/5B under surge conditions?
The SM6T27AHE3/5B has a maximum clamping voltage (VC) of 37.5 V when subjected to a 10/1000 μs waveform peak pulse current (IPPM) of 16 A. This value is measured per Figure 1 in the Vishay datasheet 88385 and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Can SM6T27AHE3/5B replace SM6T24A in an existing design?
SM6T27AHE3/5B can replace SM6T24A only if the system's stand-off voltage margin allows 23.1 V (vs. SM6T24A's 20.5 V) and clamping voltage tolerance extends to 37.5 V (vs. SM6T24A's 33.2 V). No PCB changes are needed due to identical SMB package and pinout, but functional validation under worst-case transients is required to confirm protection adequacy.
What is the thermal resistance of SM6T27AHE3/5B and how does it affect layout?
The SM6T27AHE3/5B 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. To maintain TJ ≤ 150 °C under 5.0 W steady-state dissipation, designers must ensure adequate copper area and avoid excessive ambient temperature rise-especially in enclosed automotive or industrial enclosures.
SM6T27AHE3/5B 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 16A
- 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 (SMBJ)
SM6T27AHE3/5B FAQ
1.How can I place an order for SM6T27AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27AHE3/5B 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 SM6T27AHE3/5B reliable?
The price and inventory of SM6T27AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T27AHE3/5B is usually 5 days.
3.What payment methods are accepted for SM6T27AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27AHE3/5B?
SM6T27AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27AHE3/5B 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 SM6T27AHE3/5B?
For technical support, including SM6T27AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27AHE3/5B requirements.
6.How does Aetrix verify that SM6T27AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T27AHE3/5B 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 SM6T27AHE3/5B meets industry standards.
7.What is the process for return or replacement of SM6T27AHE3/5B?
All SM6T27AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27AHE3/5B, 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 SM6T27AHE3/5B part is unused and in its original packaging.
Return procedure for SM6T27AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27AHE3/5B Tags
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