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Vishay General Semiconductor - Diodes Division 1.5SMC18AHE3/57T
- Part No.:
- 1.5SMC18AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC18AHE3/57T.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,878
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Product details
Overview
1.5SMC18AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 1500 W peak pulse power rating (10/1000 μs), 18 V breakdown voltage (VBR = 17.1–18.9 V at 1 mA), 15.3 V stand-off voltage (VWM), and clamps to ≤25.2 V at 59.5 A peak pulse current - deployed in automotive sensor interfaces, industrial I/O modules, and DC power rail protection.
For engineers reviewing the 1.5SMC18AHE3/57T datasheet, 1.5SMC18AHE3/57T pinout, 1.5SMC18AHE3/57T application, or 1.5SMC18AHE3/57T equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, SMC (DO-214AB) package details, thermal resistance (RθJA = 75 °C/W), and design-meaningful clamping behavior for fast transient immunity validation.
Technical Context
The 1.5SMC18AHE3/57T operates as a unidirectional avalanche-clamping device with glass-passivated junction, enabling sub-nanosecond response to ESD and lightning-induced transients. Its 1500 W peak pulse power rating is specified under standardized 10/1000 μs waveform conditions with 0.01% duty cycle, and it maintains stable clamping performance across -65 °C to +150 °C operating junction temperature range.
Designed for surface-mount placement on 8.0 mm × 8.0 mm copper pads per terminal, it achieves low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.40). The cathode band marking identifies polarity, and its MSL Level 1 rating (260 °C peak reflow) supports automated assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at 1 mA - defines precise avalanche onset threshold for predictable turn-on during overvoltage events |
| VWM | 15.3 V - maximum continuous reverse working voltage before leakage exceeds 1 μA; sets safe DC bias margin |
| VC @ IPPM | ≤25.2 V at 59.5 A - clamping voltage under full 1500 W transient load; determines protected circuit's maximum stress level |
| PPPM | 1500 W (10/1000 μs) - peak surge energy handling capacity; enables protection against IEC 61000-4-5 Level 4 surges |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on standard PCB pad layout; informs derating above 25 °C ambient |
| TJ max | +150 °C - maximum allowable junction temperature; supports operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by black band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected line connection point | Connected to line requiring clamping; reverse-biased during normal operation; conducts during positive transients |
| Anode (unbanded end) | Reference/ground return path | Typically tied to system ground or low-impedance reference; completes clamping current path during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables single-device protection against severe lightning-induced surges per IEC 61000-4-5, eliminating need for multi-stage designs |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units, ADAS sensors, and body electronics with extended lifetime requirements |
| Low clamping ratio (VC/VBR ≈ 1.40) | Minimizes voltage overshoot during clamping, reducing risk of damage to downstream MOSFETs, MCUs, or analog front-ends |
| MSL Level 1, 260 °C peak reflow | Supports lead-free reflow without baking or special handling, streamlining high-volume SMT manufacturing |
| Glass passivated junction | Ensures stable leakage and breakdown characteristics over time and temperature, critical for long-life industrial deployments |
Applications
| Automotive Sensor Protection | Industrial DC Power Rail |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output line and chassis ground to clamp positive transients while blocking reverse leakage. Use Value: Maintains signal integrity below 25.2 V during 59.5 A surges, preventing latch-up or permanent damage to 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding 12 V/24 V DC input rails in PLC I/O modules and motor drive controllers against inductive switching spikes. IC Role / Device Role / Timing Role: Mounted across input terminals to shunt transient energy into ground plane before reaching upstream regulators or gate drivers. Use Value: Absorbs 1500 W surges without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards. |
| Consumer Power Adapter Input | Telecom Line Interface |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters and USB PD chargers exposed to mains-borne transients. IC Role / Device Role / Timing Role: Placed after rectifier but before primary-side controller to limit voltage stress on bulk capacitor and switching FET. Use Value: Clamps to ≤25.2 V within nanoseconds, preventing overvoltage failure of 30 V-rated electrolytic capacitors and MOSFETs. |
Use Scenario: Protecting Ethernet PHYs and DSL line drivers from induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Unidirectional TVS connected between line pair and local ground to suppress common-mode surges without affecting differential signaling. Use Value: Delivers <1 nS response and low capacitance (<100 pF), preserving signal integrity up to 100 Mbps while meeting GR-1089-CORE surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Same VWM (15.3 V) and VC (25.2 V), but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load-dump where 1500 W is required | Select when board space is constrained and surge threat level is moderate; verify thermal margin with reduced copper area |
| 1.5KE18A | Same electrical specs but axial DO-15 package; no AEC-Q101 qualification; higher RθJA (~65 °C/W on minimal pads) | Not suitable for automated SMT production or automotive under-hood use; requires manual assembly and larger keep-out | Use only in legacy through-hole designs or prototyping where rework tolerance outweighs production efficiency and qualification needs |
Compared with SMBJ18A and 1.5KE18A, the 1.5SMC18AHE3/57T uniquely combines AEC-Q101 qualification, 1500 W surge capability, and SMC package manufacturability - making it the only choice for volume automotive and industrial SMT applications demanding both high reliability and high energy absorption.
Availability
1.5SMC18AHE3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and telecom line conditioning requiring stable component supply, AEC-Q101 traceability, and consistent SMC (DO-214AB) packaging.
Supply support for 1.5SMC18AHE3/57T 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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive qualification.
The 1.5SMC Series was developed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 compliance, and surface-mount scalability are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC18AHE3/57T under maximum surge conditions?
The 1.5SMC18AHE3/57T clamps to a maximum of 25.2 V when subjected to its rated 59.5 A peak pulse current (10/1000 μs waveform). This value is measured at the device terminals under standardized test conditions with 8.0 mm × 8.0 mm copper pads per lead, ensuring repeatable performance for system-level surge validation.
Is the 1.5SMC18AHE3/57T qualified for automotive applications?
Yes, the 1.5SMC18AHE3/57T carries the HE3 suffix, indicating full AEC-Q101 qualification. It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC standards - making it approved for use in engine control, ADAS, and body electronics where reliability under thermal and electrical stress is critical.
What does the "HE3" suffix mean in 1.5SMC18AHE3/57T?
The "HE3" suffix in 1.5SMC18AHE3/57T denotes RoHS-compliant construction plus full AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3 or M3 versions and confirms compliance with automotive reliability requirements, including extended temperature operation and lifetime stability under bias.
Can the 1.5SMC18AHE3/57T be used in bidirectional configurations?
No, the 1.5SMC18AHE3/57T is strictly unidirectional. Bidirectional variants use the "CA" suffix (e.g., 1.5SMC18CA). Using the 1.5SMC18AHE3/57T in bidirectional circuits would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
What is the thermal resistance of the 1.5SMC18AHE3/57T, and how does it affect layout?
The 1.5SMC18AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures under repetitive surges, PCB layout must provide adequate copper area and avoid excessive trace length or isolation that increases thermal impedance.
1.5SMC18AHE3/57T 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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- 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)
1.5SMC18AHE3/57T FAQ
1.How can I place an order for 1.5SMC18AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC18AHE3/57T 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 1.5SMC18AHE3/57T reliable?
The price and inventory of 1.5SMC18AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC18AHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC18AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC18AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC18AHE3/57T?
1.5SMC18AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC18AHE3/57T 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 1.5SMC18AHE3/57T?
For technical support, including 1.5SMC18AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC18AHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC18AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC18AHE3/57T 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 1.5SMC18AHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC18AHE3/57T?
All 1.5SMC18AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC18AHE3/57T, 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 1.5SMC18AHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC18AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC18AHE3/57T Tags
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