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Vishay General Semiconductor - Diodes Division 1.5SMC27AHE3/9AT
- Part No.:
- 1.5SMC27AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27AHE3/9AT.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
1.5SMC27AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 27 V breakdown voltage (VBR min = 25.7 V, max = 28.4 V), 23.1 V stand-off voltage (VWM), clamps to ≤37.5 V at 40 A peak pulse current (IPPM), and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC27AHE3/9AT datasheet, 1.5SMC27AHE3/9AT pinout, 1.5SMC27AHE3/9AT application, or 1.5SMC27AHE3/9AT equivalent, this AEC-Q101-qualified, RoHS-compliant TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive powertrain modules, industrial motor drives, and telecom line-card ESD protection.
Technical Context
The 1.5SMC27AHE3/9AT operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its specified VBR range (25.7–28.4 V at 1 mA test current). Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), enabling effective suppression of transient events before downstream components are damaged.
Thermally, it exhibits RθJA = 75 °C/W (junction-to-ambient, on recommended 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W (junction-to-leads), supporting reliable operation up to TJ = +150 °C. It is rated for non-repetitive IFSM = 200 A (8.3 ms half-sine) and derates linearly above 25 °C ambient per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise avalanche onset threshold for consistent clamping activation |
| VWM | 23.1 V - maximum continuous reverse operating voltage; ensures no conduction during normal system operation |
| VC @ IPPM | ≤37.5 V at 40 A (10/1000 µs) - actual clamped voltage seen by protected circuit under worst-case surge |
| PPPM | 1500 W - peak transient energy handling capacity; enables protection against IEC 61000-4-5 Level 4 surges |
| IPPM | 40 A - maximum non-repetitive surge current supported without degradation |
| TJ max | +150 °C - junction temperature limit; supports under-hood automotive and high-temperature industrial use |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" x 0.320" footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with UL 94 V-0 flammability rating; cathode indicated by band on body; terminals are matte tin-plated and solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to lower-potential side (e.g., ground or return path); defines polarity-sensitive placement |
| Cathode | Avalanche conduction terminal / Clamping output node | Banded end; connected to protected line (e.g., 24 V rail or CAN_H); conducts surge current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain, body electronics, and ADAS modules requiring zero-failure reliability |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in industrial and telecom applications |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage |
| MSL Level 1 (260 °C reflow) | Enables single-pass lead-free assembly without pre-baking; compatible with standard SMT production lines |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage (ID ≤ 1 µA at VWM) across temperature and lifetime |
Applications
| Automotive Power Distribution | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) from load-dump transients (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps 120 V/200 ms load dump to ≤37.5 V, preventing overvoltage shutdown of PMICs and microcontrollers. |
Use Scenario: Shielding gate drivers and current-sense amplifiers in variable-frequency drives from IGBT switching noise and inductive kickback. IC Role / Device Role / Timing Role: TVS mounted across motor-phase outputs and isolated feedback paths. Use Value: Sub-1 ns response limits dv/dt stress on optocouplers and isolators, preserving signal integrity in PWM timing loops. |
| Telecom Line Interface Protection | Consumer Sensor Hub ESD Hardening |
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors against lightning-induced surges on RJ45 ports (IEC 61000-4-5). IC Role / Device Role / Timing Role: Primary-level TVS on differential pairs upstream of common-mode chokes. Use Value: 1500 W rating handles 4 kV open-circuit surge with <37.5 V clamping, maintaining Ethernet link integrity during transient events. |
Use Scenario: Adding secondary protection to MEMS accelerometer/gyro interfaces in smart home hubs exposed to human-body-model (HBM) ESD. IC Role / Device Role / Timing Role: TVS placed at connector entry point before analog front-end amplifier. Use Value: Low VWM (23.1 V) avoids interference with 3.3 V/5 V logic levels while suppressing >8 kV contact ESD per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Lower PPPM (600 W), smaller SMB package (DO-214AA), VWM = 24 V, VC = 38.9 V @ 15.4 A | Targeted at space-constrained consumer electronics; insufficient for ISO 16750-2 load dump compliance | Select only for cost-sensitive, low-energy surge environments where PCB area is critical and 1500 W rating is unnecessary |
| 1.5KE27A | Through-hole TO-204AE (DO-41), same VBR/VWM, but higher VC (41.5 V) and lower IPPM (36.3 A) | Legacy designs requiring axial-lead replacement; not suitable for automated SMT assembly or high-density layouts | Choose only for repair, legacy board refresh, or prototyping where SMT infrastructure is unavailable |
Compared with SMBJ24A and 1.5KE27A, the 1.5SMC27AHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capability in an SMC package, and tight VC specification - making it the only option among the three qualified for automotive-grade, high-reliability surface-mount surge protection.
Availability
1.5SMC27AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, telecom line cards, and consumer sensor hubs requiring stable component supply, AEC-Q101 traceability, and full RoHS compliance.
Supply support for 1.5SMC27AHE3/9AT 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, efficiency, and application-specific performance.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, high surge robustness, and qualification-grade consistency are mandatory.
FAQ
What is the maximum clamping voltage of the 1.5SMC27AHE3/9AT under surge conditions?
The 1.5SMC27AHE3/9AT clamps to a maximum of 37.5 V when subjected to its rated 40 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Document Number 88303, page 2) and represents the upper limit of voltage imposed on the protected circuit during worst-case transient events.
Is the 1.5SMC27AHE3/9AT suitable for automotive applications?
Yes, the 1.5SMC27AHE3/9AT is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix (RoHS-compliant and AEC-Q101 qualified). It meets requirements for engine control units, body controllers, and ADAS modules where reliability under thermal cycling, vibration, and load-dump conditions is essential.
What does the "9AT" suffix indicate in 1.5SMC27AHE3/9AT?
The "9AT" suffix denotes packaging: 13-inch diameter plastic tape and reel, with 3500 units per reel. This format supports high-volume automated SMT placement and is distinct from the "57T" (7-inch reel, 850 units) variant - both share identical electrical and thermal specifications for the 1.5SMC27AHE3/9AT device.
How does the 1.5SMC27AHE3/9AT differ from bidirectional TVS diodes like 1.5SMC27CA?
The 1.5SMC27AHE3/9AT is unidirectional and features a cathode band for polarity-sensitive placement; it blocks forward current and clamps only reverse transients. In contrast, 1.5SMC27CA is bidirectional, symmetric in both directions, and lacks polarity marking - making it suitable for AC lines or differential data lines where voltage polarity reverses.
What is the thermal resistance of the 1.5SMC27AHE3/9AT, and how does it affect layout design?
The 1.5SMC27AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under sustained 6.5 W power dissipation, designers must ensure adequate copper area and avoid excessive ambient temperature - especially in enclosed automotive or industrial enclosures.
1.5SMC27AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, 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)
1.5SMC27AHE3/9AT FAQ
1.How can I place an order for 1.5SMC27AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27AHE3/9AT 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 1.5SMC27AHE3/9AT reliable?
The price and inventory of 1.5SMC27AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC27AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27AHE3/9AT?
1.5SMC27AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27AHE3/9AT 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 1.5SMC27AHE3/9AT?
For technical support, including 1.5SMC27AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC27AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27AHE3/9AT 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 1.5SMC27AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC27AHE3/9AT?
All 1.5SMC27AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27AHE3/9AT, 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 1.5SMC27AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC27AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27AHE3/9AT Tags
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