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Vishay General Semiconductor - Diodes Division SM15T27AHE3/57T
- Part No.:
- SM15T27AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27AHE3/57T.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,178
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Product details
Overview
SM15T27AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features 27 V standoff voltage (VWM = 23.1 V), 37.5 V clamping voltage at 40 A peak pulse current (10/1000 μs), 1500 W peak pulse power rating, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM15T27AHE3/57T datasheet, SM15T27AHE3/57T pinout, SM15T27AHE3/57T application, or SM15T27AHE3/57T equivalent, key selection criteria include clamping performance under 10/1000 μs transients, unidirectional polarity with cathode band marking, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T27AHE3/57T operates as a silicon avalanche diode that enters breakdown when reverse voltage exceeds its 25.7–28.4 V breakdown range (VBR at 1 mA), clamping transient energy to protect downstream ICs and MOSFETs. Its low-inductance SMC package and glass-passivated junction enable fast response (<1 ns) to lightning-induced or switching-induced surges.
It is rated for 1500 W peak pulse power (10/1000 μs), 200 A non-repetitive forward surge current (10 ms half-sine), and operates across –65 °C to +150 °C junction temperature. The device fails short-circuit under overstress and meets MSL Level 1 (260 °C reflow peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 23.1 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines normal operating margin before clamping. |
| VBR (Breakdown Voltage) | 25.7–28.4 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage. |
| VC (Clamping Voltage) | 37.5 V at IPPM = 40 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; determines safe margin for 24 V systems. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capability for standardized lightning/transient waveforms; validates suitability for I/O and power rail protection. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on recommended 8.0 mm × 8.0 mm pad layout; enables thermal derating above 25 °C ambient. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side (e.g., ground or return path); defines polarity for unidirectional clamping. |
| Cathode | Avalanche conduction terminal | Marked with band; connected to higher-potential line (e.g., 24 V rail); conducts surge current to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validates robustness against IEC 61000-4-5 Level 4 (4 kV) surges on 24 V power rails without derating. |
| Glass-passivated chip junction | Ensures stable VBR and low leakage over temperature and lifetime; eliminates risk of moisture-induced parameter drift. |
| AEC-Q101 qualified (HE3 suffix) | Confirms reliability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Low-inductance SMC package | Minimizes voltage overshoot during fast-rising transients (<1 ns response), critical for protecting high-speed logic and gate drivers. |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control modules from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and DC/DC converter input. Use Value: Clamps to 37.5 V at 40 A, maintaining safe margin below 40 V maximum rating of downstream regulators and microcontrollers. |
Use Scenario: Shielding analog and digital I/O channels in programmable logic controllers from ESD and inductive kickback. IC Role / Device Role / Timing Role: Standoff-clamp protector on RS-485, CAN, or 4–20 mA loop inputs. Use Value: Low 1 μA leakage at 23.1 V ensures minimal impact on precision current-loop accuracy while suppressing >1 kV transients. |
| Telecom Power Interface | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding PoE-powered Ethernet switch ports against lightning-induced surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC/DC isolation and hot-swap controller. Use Value: 1500 W rating handles combined common-mode and differential-mode threats per IEEE C62.41.2 Category B/C requirements. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Flyback energy clamp across motor terminals or H-bridge high-side switches. Use Value: 200 A IFSM withstands repetitive 10 ms coil-decay surges without degradation; RoHS-compliant HE3 suffix meets global appliance regulations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/57T | Lower PPPM (400 W), lower VWM (20.5 V), same SMC package but non-AEC-Q101. | Rated for commercial-grade industrial use only; insufficient for automotive load-dump compliance. | Select when cost sensitivity outweighs automotive qualification and 1500 W surge margin is unnecessary. |
| SMCJ24A-QH | AEC-Q101 qualified, same 24 V nominal rating, but VWM = 20.5 V and VC = 38.9 V at 38.8 A (10/1000 μs). | Higher clamping voltage and lower peak pulse current than SM15T27AHE3/57T; less margin for 24 V systems. | Choose if legacy design uses SMCJ series footprint and minor clamping increase is acceptable. |
Compared with SMAJ24A-E3/57T and SMCJ24A-QH, the SM15T27AHE3/57T delivers superior 1500 W surge handling, tighter 23.1 V standoff for 24 V systems, and verified AEC-Q101 compliance-making it optimal for next-generation automotive and industrial power rail protection where reliability and margin are critical.
Availability
SM15T27AHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and telecom power interfaces requiring stable component supply, AEC-Q101 qualification, and high-energy transient immunity.
Supply support for SM15T27AHE3/57T 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, and protection devices with emphasis on reliability, power handling, and automotive-grade qualification.
The SM15T Series was developed specifically for high-power transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where 1500 W surge capability and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SM15T27AHE3/57T at its rated peak pulse current?
The SM15T27AHE3/57T has a maximum clamping voltage (VC) of 37.5 V when subjected to a 10/1000 μs waveform at 40 A peak pulse current (IPPM). This value is measured under standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and defines the upper voltage limit imposed on protected circuits during surge events. The SM15T27AHE3/57T maintains this clamping performance across its operational temperature range.
Is SM15T27AHE3/57T suitable for automotive applications?
Yes, SM15T27AHE3/57T is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its ordering code. It is rated for junction temperatures from –65 °C to +150 °C and meets MSL Level 1 reflow requirements (260 °C peak). The SM15T27AHE3/57T is explicitly intended for automotive power rail and sensor interface protection, including engine control, body electronics, and ADAS subsystems.
What does the "57T" suffix indicate in SM15T27AHE3/57T?
The "57T" suffix denotes the preferred packaging format: 7-inch diameter plastic tape and reel, containing 850 units per reel. This format is optimized for high-volume automated SMT placement. The "HE3" portion confirms RoHS-compliance and AEC-Q101 qualification, while "57T" specifies mechanical delivery mode-not electrical or thermal characteristics. The SM15T27AHE3/57T is fully compatible with standard SMC pick-and-place equipment.
How does SM15T27AHE3/57T differ from bidirectional TVS diodes like SM15T27CA?
The SM15T27AHE3/57T is unidirectional and features a cathode band marking; it conducts only in reverse breakdown and blocks forward current. In contrast, SM15T27CA is bidirectional with no polarity marking and clamps in both directions. The SM15T27AHE3/57T is used where DC bias exists (e.g., 24 V supply rails), while SM15T27CA suits AC-coupled or dual-rail signal lines. Their VWM and VC values differ due to structural asymmetry.
What is the thermal resistance of SM15T27AHE3/57T, and how does it affect layout?
The SM15T27AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes no additional heatsinking. To maintain TJ ≤ 150 °C under 6.5 W steady-state dissipation, PCB layout must provide adequate copper area and avoid thermal bottlenecks. The SM15T27AHE3/57T thermal performance is validated only with this pad geometry.
SM15T27AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, 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):
- 40A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SM15T27AHE3/57T FAQ
1.How can I place an order for SM15T27AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27AHE3/57T 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 SM15T27AHE3/57T reliable?
The price and inventory of SM15T27AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T27AHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T27AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27AHE3/57T?
SM15T27AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27AHE3/57T 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 SM15T27AHE3/57T?
For technical support, including SM15T27AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27AHE3/57T requirements.
6.How does Aetrix verify that SM15T27AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T27AHE3/57T 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 SM15T27AHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T27AHE3/57T?
All SM15T27AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27AHE3/57T, 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 SM15T27AHE3/57T part is unused and in its original packaging.
Return procedure for SM15T27AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27AHE3/57T Tags
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