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Vishay General Semiconductor - Diodes Division 1.5SMC27AHE3_A/I
- Part No.:
- 1.5SMC27AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27AHE3_A/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,459
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Product details
Overview
1.5SMC27AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails 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 40 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - ideal for automotive power supply input protection against load dump and ESD.
For engineers reviewing the 1.5SMC27AHE3_A/I datasheet, 1.5SMC27AHE3_A/I pinout, 1.5SMC27AHE3_A/I application, or 1.5SMC27AHE3_A/I equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, fast response time (<1 ns), and RoHS-compliant matte tin-plated leads - critical for high-reliability automotive and industrial designs requiring validated transient immunity per ISO 7637-2 and IEC 61000-4-5.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping protector: under normal conditions it presents high impedance (>1 MΩ at VWM), but triggers into low-impedance conduction when transient voltage exceeds VBR, limiting downstream voltage to ≤37.5 V at 40 A. Its glass-passivated junction ensures stable leakage performance and long-term reliability across -65 °C to +150 °C operating range.
The 1.5SMC27AHE3_A/I uses a single P-N junction structure with cathode-band polarity marking, optimized for automated placement on PCBs with 8.0 mm × 8.0 mm copper pads per terminal. Thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), enabling effective power dissipation during repetitive transients up to 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA; sets safe operating margin below system nominal voltage (e.g., 24 V rail). |
| VBR @ IT = 1 mA | 25.7–28.4 V - Breakdown threshold where device transitions from high- to low-impedance state; defines precise clamping onset point. |
| VC @ IPPM = 40 A | 37.5 V - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected ICs or MOSFETs. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy transients like ISO 7637-2 Pulse 5a (load dump) without failure. |
| IFSM | 200 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against inrush or short-circuit events. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments with minimal derating. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with standard reflow profiles (MSL Level 1, 260 °C peak). |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional clamp configuration; must be routed with low-inductance path for effective surge shunting. |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line (e.g., 24 V supply rail); clamping action occurs between cathode and anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, body electronics, and ADAS modules. |
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) without degradation, eliminating need for external series impedance in many 24 V systems. |
| Glass passivated chip junction | Ensures stable leakage current (<1 µA at VWM) and consistent VBR over lifetime, critical for long-term field reliability in harsh environments. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD), improving protection margin for sensitive gate drivers and microcontrollers. |
| MSL Level 1, 260 °C peak reflow | Enables compatibility with standard lead-free assembly processes without pre-baking or special handling - reduces manufacturing cost and complexity. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) against load dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional voltage clamp placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤37.5 V at 40 A, preventing damage to downstream regulators and ensuring uninterrupted operation during alternator disconnection events. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation systems exposed to inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across sensor output terminals to suppress fast-rising spikes from nearby solenoid actuation. Use Value: Clamps transients within nanoseconds while maintaining <1 µA leakage at 23.1 V, preserving signal integrity and measurement accuracy without loading the loop. |
| Telecom DC Power Feeding Protection | Consumer Device USB Port ESD Protection |
Use Scenario: Shielding PoE-powered equipment (e.g., IP cameras) from surges induced on 48 V DC feeding lines due to lightning-induced coupling. IC Role / Device Role / Timing Role: Primary-level TVS on input side of DC-DC isolation stage, coordinated with secondary-side protection. Use Value: Absorbs up to 1500 W of surge energy with 37.5 V clamping, reducing risk of catastrophic failure in outdoor-installed gear subjected to Class III surge environments. |
Use Scenario: Adding secondary-level surge immunity to USB Type-C ports in portable medical monitors where ESD events exceed IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Unidirectional clamp on VBUS line, positioned upstream of USB controller and power switch. Use Value: Responds in <1 ns to divert >30 A ESD currents away from silicon, leveraging 200 A IFSM rating to survive repeated discharges without parameter shift. |
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-E3/52 | Lower peak pulse power (600 W), smaller SMB package (DO-214AA), VC = 38.9 V at 15.4 A | Suitable for space-constrained consumer electronics with lower-energy threat profiles (e.g., IEC 61000-4-5 0.5 kV), not automotive load dump | Select when board area is limited and surge requirements are ≤600 W; verify thermal margin due to higher RθJA (100 °C/W). |
| 1.5KE27A | Through-hole DO-201 package, same VBR/VC specs, but slower response and no AEC-Q101 qualification | Used in legacy industrial power supplies where manual assembly or wave soldering is preferred; lacks automotive validation | Choose only for non-automotive, cost-sensitive through-hole designs; avoid where AEC-Q101 or SMT automation is required. |
Compared with SMBJ24A-E3/52 and 1.5KE27A, the 1.5SMC27AHE3_A/I provides superior 1500 W surge handling in an AEC-Q101-qualified SMT package - making it the optimal choice for new automotive and high-reliability industrial designs demanding validated transient immunity and automated manufacturability.
Availability
1.5SMC27AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power feeding circuits, and consumer USB power delivery systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5SMC27AHE3_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 is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh-environment applications - emphasizing AEC-Q101 compliance, high pulse power density, and robust thermal performance in compact SMC packaging.
FAQ
What is the clamping voltage of the 1.5SMC27AHE3_A/I at its rated peak pulse current?
The 1.5SMC27AHE3_A/I has a maximum clamping voltage (VC) of 37.5 V at 40 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC27AHE3_A/I maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C) with minimal drift.
Is the 1.5SMC27AHE3_A/I qualified for automotive applications?
Yes, the 1.5SMC27AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3". This qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS power supplies.
What is the meaning of the "_A/I" suffix in 1.5SMC27AHE3_A/I?
The "_A/I" suffix in 1.5SMC27AHE3_A/I indicates two attributes: "A" denotes the voltage variant (27 V nominal) within the 1.5SMC family, and "I" specifies the packaging format - 13-inch diameter plastic tape and reel containing 3500 units. This matches Vishay's official ordering information table where "I" corresponds to the high-volume reel delivery mode.
How does the 1.5SMC27AHE3_A/I compare to bidirectional TVS diodes like 1.5SMC27CA?
The 1.5SMC27AHE3_A/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., 24 V supply rail), offering tighter VBR tolerance and lower leakage than bidirectional equivalents. In contrast, 1.5SMC27CA protects AC or polarity-agnostic lines but exhibits higher capacitance and symmetric clamping in both directions. Use 1.5SMC27AHE3_A/I when protecting grounded DC rails; select 1.5SMC27CA only for floating or AC-coupled signals.
What is the thermal resistance specification for the 1.5SMC27AHE3_A/I?
The 1.5SMC27AHE3_A/I 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, and a junction-to-leads resistance (RθJL) of 15 °C/W. These values enable reliable power dissipation during repetitive transients and inform PCB layout decisions - such as minimum copper area and via count - to maintain junction temperature below 150 °C under worst-case duty cycles.
1.5SMC27AHE3_A/I 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:
- 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)
1.5SMC27AHE3_A/I FAQ
1.How can I place an order for 1.5SMC27AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27AHE3_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 1.5SMC27AHE3_A/I reliable?
The price and inventory of 1.5SMC27AHE3_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 1.5SMC27AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC27AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27AHE3_A/I?
1.5SMC27AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27AHE3_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 1.5SMC27AHE3_A/I?
For technical support, including 1.5SMC27AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC27AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27AHE3_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 1.5SMC27AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC27AHE3_A/I?
All 1.5SMC27AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27AHE3_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 1.5SMC27AHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC27AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27AHE3_A/I Tags
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