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Vishay General Semiconductor - Diodes Division SM15T27AHE3_A/I
- Part No.:
- SM15T27AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27AHE3_A/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,676
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Product details
Overview
SM15T27AHE3_A/I from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in SMC (DO-214AB) package, featuring 27 V standoff voltage (VWM = 23.1 V), 37.5 V clamping voltage at 40 A peak pulse current, and AEC-Q101 qualification for automotive applications. It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T27AHE3_A/I datasheet, SM15T27AHE3_A/I pinout, SM15T27AHE3_A/I application, or SM15T27AHE3_A/I equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under 10/1000 μs waveform, and AEC-Q101-compliant supply chain context for automotive-grade design-in.
Technical Context
The SM15T27AHE3_A/I uses a glass-passivated silicon junction to achieve low clamping ratio (VC/VBR ≈ 1.33) and low dynamic impedance, enabling fast response to sub-microsecond transients. Its unidirectional polarity supports DC-biased protection paths with cathode-band identification.
Rated for 150 °C maximum junction temperature and 75 °C/W junction-to-ambient thermal resistance, it operates reliably under high ambient conditions when mounted on 8.0 mm × 8.0 mm copper pads. The device fails short-circuit under overstress - a predictable, system-safe failure mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 23.1 V - Maximum continuous reverse voltage before leakage exceeds 1 μA; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 25.7–28.4 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above normal operating voltage |
| VC (Clamping Voltage) | 37.5 V at 40 A (10/1000 μs) - Limits transient voltage seen by protected circuitry; enables safe operation of 24 V automotive electronics |
| PPPM (Peak Pulse Power) | 1500 W - Sustains single 10/1000 μs surges up to 40 A without degradation; suitable for ISO 7637-2 Pulse 1 & 2a threats |
| TJ max. | 150 °C - Enables use in under-hood automotive environments; requires thermal pad layout per JESD51-3 for rated power dissipation |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic modules per stress test requirements including HTOL, TCT, and ESD HBM ≥ 8 kV |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1, 260 °C reflow peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to ground or low-side reference in unidirectional TVS configuration |
| Cathode (marked with band) | Current exit terminal in forward bias; high-impedance node in reverse standby | Connected to protected line (e.g., CAN_H, LIN, sensor VOUT); defines polarity-sensitive placement |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2a (supply disconnection) in 12 V/24 V systems |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage stress on downstream components; critical for 3.3 V/5 V logic interfacing via level-shifting buffers |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain, body control, and ADAS modules requiring long-term reliability under thermal cycling and vibration |
| Low inductance package | Reduces voltage overshoot during fast-rising transients (< 1 ns rise time); preserves clamping effectiveness in high-speed data lines |
| MSL Level 1, 260 °C peak reflow | Enables standard SMT assembly without moisture sensitivity concerns; eliminates bake requirement pre-reflow |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) from load dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surge energy before LDO/regulator stage. Use Value: Clamps to 37.5 V at 40 A, preventing overvoltage damage to 40 V-rated input stages while maintaining AEC-Q101 compliance. |
Use Scenario: Safeguarding analog output lines of pressure/temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Point-of-entry TVS on 0–10 V or 4–20 mA signal path, upstream of op-amp buffer and ADC driver. Use Value: Sub-100 ns response limits transient propagation; low leakage (<1 μA at 23.1 V) avoids signal offset errors in precision measurement. |
| Telecom DC Power Interface | Consumer Device USB/Type-C Port Protection |
Use Scenario: Shielding -48 V telecom rectifier outputs from lightning-induced surges entering via building wiring. IC Role / Device Role / Timing Role: Primary unidirectional TVS on DC feed line before DC-DC converter input, referenced to chassis ground. Use Value: 1500 W rating handles multi-kA induced surges; 150 °C TJ max supports operation in sealed outdoor cabinets. |
Use Scenario: Secondary-level protection on VBUS line of USB Type-C ports in portable monitors and docking stations. IC Role / Device Role / Timing Role: Back-to-back TVS not used; SM15T27AHE3_A/I applied as unidirectional clamp from VBUS to GND to suppress positive-going spikes only. Use Value: 23.1 V VWM allows compatibility with 20 V PD 3.0 operation; 37.5 V VC prevents latch-up in USB controller ICs rated to 40 V abs max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24AHE3_A/I | Lower PPPM (400 W), lower VWM (20.5 V), same SMC package and AEC-Q101 qualification | Targeted for lower-energy threats (e.g., ESD + minor switching noise); insufficient for ISO 7637-2 Pulse 1 | Select when system-level threat analysis confirms peak currents < 15 A and clamping headroom > 30 V is acceptable |
| SMCJ24AHE3_A/I | Higher PPPM (3000 W), same VWM (20.5 V), larger SMC package (DO-214AB footprint but thicker profile) | Required for severe automotive load dump where IPPM exceeds 40 A; higher thermal mass improves sustained surge handling | Choose when board space permits larger body and system validation requires >2000 W surge margin |
Compared with SMAJ24AHE3_A/I and SMCJ24AHE3_A/I, the SM15T27AHE3_A/I delivers optimal balance of 1500 W surge capacity, 23.1 V standoff, and compact SMC footprint - making it the preferred choice for mid-tier automotive and industrial 24 V systems where both space and cost constraints apply.
Availability
SM15T27AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, and telecom DC power systems requiring stable component supply with full AEC-Q101 traceability and RoHS/halogen-free compliance.
Supply support for SM15T27AHE3_A/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, automotive-qualified components.
The SM15T Series was developed specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where predictable short-circuit failure and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SM15T27AHE3_A/I at its rated peak pulse current?
The SM15T27AHE3_A/I has a maximum clamping voltage (VC) of 37.5 V when subjected to a 10/1000 μs waveform at 40 A peak pulse current. This value is measured under standardized test conditions with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC standards. The SM15T27AHE3_A/I maintains this clamping performance across its specified operating temperature range, ensuring consistent protection for 24 V systems.
Is SM15T27AHE3_A/I suitable for bidirectional transient protection?
No, SM15T27AHE3_A/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the CA-suffixed variant (e.g., SM15T27CAHE3_A/I). Using SM15T27AHE3_A/I in AC or bipolar signal paths would result in forward conduction during negative transients, potentially damaging the device or failing to suppress.
Does SM15T27AHE3_A/I meet automotive qualification standards?
Yes, SM15T27AHE3_A/I carries the HE3 suffix, confirming it is AEC-Q101 qualified. This includes testing for high-temperature operating life (HTOL), temperature cycling (TCT), and electrostatic discharge (HBM ≥ 8 kV). The SM15T27AHE3_A/I is approved for use in automotive powertrain, body electronics, and ADAS modules where long-term reliability under thermal and mechanical stress is required.
What is the thermal resistance of SM15T27AHE3_A/I, and how does it affect PCB layout?
The SM15T27AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperatures under continuous power dissipation, designers must adhere to this pad layout. Reducing pad area increases RθJA and risks exceeding the 150 °C maximum junction temperature - especially during repetitive surge events.
How does the SM15T27AHE3_A/I compare to older SMAJ-series TVS diodes in surge handling capability?
The SM15T27AHE3_A/I delivers 1500 W peak pulse power (10/1000 μs), triple the 400 W rating of the SMAJ24AHE3_A/I. This enables the SM15T27AHE3_A/I to safely absorb higher-energy transients such as ISO 7637-2 Pulse 1 (load dump), where peak currents reach 40 A. Its higher clamping voltage (37.5 V vs. ~32 V for SMAJ24A) is offset by superior energy-handling margin - a deliberate trade-off for automotive-grade robustness.
SM15T27AHE3_A/I 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:
- Active
- 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_A/I FAQ
1.How can I place an order for SM15T27AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27AHE3_A/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 SM15T27AHE3_A/I reliable?
The price and inventory of SM15T27AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T27AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T27AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27AHE3_A/I?
SM15T27AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27AHE3_A/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 SM15T27AHE3_A/I?
For technical support, including SM15T27AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27AHE3_A/I requirements.
6.How does Aetrix verify that SM15T27AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T27AHE3_A/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 SM15T27AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T27AHE3_A/I?
All SM15T27AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27AHE3_A/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 SM15T27AHE3_A/I part is unused and in its original packaging.
Return procedure for SM15T27AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27AHE3_A/I Tags
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