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Vishay General Semiconductor - Diodes Division 1.5SMC12AHE3/57T
- Part No.:
- 1.5SMC12AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12AHE3/57T.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,061
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Product details
Overview
1.5SMC12AHE3/57T 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 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), clamps to ≤16.7 V at 89.8 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and DC power rail protection.
For engineers reviewing the 1.5SMC12AHE3/57T datasheet, 1.5SMC12AHE3/57T pinout, 1.5SMC12AHE3/57T application, or 1.5SMC12AHE3/57T equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and clamping performance under repetitive surge conditions.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (>1 MΩ at VWM), but triggers into low-impedance conduction when transient voltage exceeds VBR, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable avalanche characteristics and long-term reliability under repeated stress.
Designed for surface-mount automated assembly, the device meets J-STD-020 MSL Level 1 (peak reflow 260 °C) and supports bidirectional variants via CA suffix - though 1.5SMC12AHE3/57T is strictly unidirectional, with cathode marked by a band. It is rated for -65 °C to +150 °C operating junction temperature and exhibits a positive VBR temperature coefficient of +0.078 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - defines precise avalanche onset threshold for predictable clamping initiation |
| VWM | 10.2 V - maximum continuous reverse working voltage before leakage exceeds 5 μA |
| VC @ IPPM | ≤16.7 V at 89.8 A - clamping voltage during 1500 W transient, limiting stress on protected ICs |
| PPPM | 1500 W (10/1000 μs) - peak surge power handling capacity for lightning and inductive-switching transients |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C ambient |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by a band at one end; anode is unmarked opposite end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VAK > VBR |
| Anode (unmarked end) | Reference node | Typically tied to system ground or low-impedance return path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against severe transients like ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems |
| AEC-Q101 qualified | Validated for automotive electronics use including engine control units, ADAS sensors, and body controllers |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns response time) |
| MSL Level 1 moisture sensitivity | Allows direct placement without baking; compatible with standard lead-free reflow profiles up to 260 °C |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal cycling and humidity stress |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground, clamping transients before they reach the transceiver input stage. Use Value: Limits voltage to ≤16.7 V during 89.8 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs while maintaining signal integrity. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers exposed to inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input traces, coordinated with series current-limiting resistors and optocoupler isolation barriers. Use Value: Absorbs 1500 W surges without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity requirements. |
| DC Power Rail Protection | Consumer Power Adapter Output Stage |
Use Scenario: Secondary-side transient suppression on 12 V output rails of switched-mode power supplies used in networking equipment and base stations. IC Role / Device Role / Timing Role: Fast-acting parallel clamp across output capacitor, activated within nanoseconds to limit overshoot during hot-swap or short-circuit recovery events. Use Value: Clamps to 16.7 V at full rated surge current, preserving MOSFET gate drivers and downstream DC-DC converters rated for ≤20 V absolute maximum. |
Use Scenario: Output-line surge protection in USB-C PD adapters and wall-mounted AC/DC adapters subject to mains-borne transients and user-handling ESD. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 5 V/9 V/12 V outputs, placed immediately before connector to prevent coupling into connected devices. Use Value: RoHS-compliant and halogen-free (HE3 suffix), meeting consumer safety standards while delivering certified 1500 W surge capability in compact SMC footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/52 | Lower peak power rating (600 W), smaller SMB (DO-214AA) package, identical VWM/VBR range | Suitable for space-constrained consumer ports but insufficient for automotive load dump | Select when board area is limited and surge energy is ≤600 W; verify thermal margin with RθJA = 110 °C/W |
| 1.5KE12A | Through-hole DO-201 package, same electrical specs, no AEC-Q101 qualification, higher RθJA (65 °C/W on infinite heatsink only) | Used in legacy industrial power supplies where reworkability and manual assembly are prioritized | Choose for prototyping or low-volume through-hole designs; not recommended for new automotive or high-reliability SMT production |
Compared with SMBJ12A-E3/52 and 1.5KE12A, the 1.5SMC12AHE3/57T uniquely combines AEC-Q101 qualification, 1500 W surge capacity in SMC form factor, and MSL Level 1 reflow compatibility - making it the preferred choice for volume automotive and industrial SMT applications requiring certified reliability and high-energy clamping.
Availability
1.5SMC12AHE3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and DC power rail protection requiring stable component supply, AEC-Q101 traceability, and RoHS/halogen-free compliance.
Supply support for 1.5SMC12AHE3/57T 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness, AEC-Q101 validation, and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC12AHE3/57T at its rated peak pulse current?
The 1.5SMC12AHE3/57T clamps to a maximum of 16.7 V when subjected to its rated peak pulse current of 89.8 A (10/1000 μs waveform). This value is measured under standardized test conditions with 0.31" × 0.31" copper pads per terminal and represents the upper limit of voltage seen by protected circuitry during worst-case surge events. The 1.5SMC12AHE3/57T maintains this clamping performance across its qualified operating temperature range.
Is the 1.5SMC12AHE3/57T suitable for automotive applications?
Yes, the 1.5SMC12AHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix, indicating RoHS-compliant and AEC-Q101-qualified construction. It meets requirements for under-hood and cabin electronics, including protection of CAN transceivers, sensor front-ends, and power distribution nodes against ISO 7637-2 and ISO 16750-2 transients. The 1.5SMC12AHE3/57T is referenced in Vishay's automotive-grade product documentation for ECU and ADAS subsystems.
What does the "HE3/57T" suffix indicate in 1.5SMC12AHE3/57T?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification, while "57T" specifies packaging in 7-inch plastic tape-and-reel format with 850 units per reel. This ordering code confirms the device meets automotive reliability standards and is supplied in SMT-ready format compatible with high-speed pick-and-place equipment. The 1.5SMC12AHE3/57T is distinct from commercial-grade E3 or M3 variants lacking AEC-Q101 validation.
How does the thermal performance of the 1.5SMC12AHE3/57T affect its surge rating?
The 1.5SMC12AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, meaning its ability to sustain repetitive surges degrades as ambient temperature rises. Derating curves in the datasheet show that at 85 °C ambient, its 1500 W peak pulse rating drops to ~900 W. Proper PCB copper pour design and airflow must be implemented to maintain safe junction temperatures. The 1.5SMC12AHE3/57T thermal behavior is fully characterized in Figure 2 of Vishay document 88303.
Can the 1.5SMC12AHE3/57T be used in bidirectional signal line protection?
No, the 1.5SMC12AHE3/57T is a unidirectional TVS diode, intended for DC-biased lines such as power rails or single-ended signals referenced to ground. For bidirectional applications like data lines (e.g., RS-485, USB D+/D−), Vishay specifies the "CA" variant (e.g., 1.5SMC12CAHE3/57T), which provides symmetrical clamping in both polarities. Using the 1.5SMC12AHE3/57T on AC-coupled or floating lines risks forward conduction and failure.
1.5SMC12AHE3/57T 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 89.8A
- 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)
1.5SMC12AHE3/57T FAQ
1.How can I place an order for 1.5SMC12AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12AHE3/57T 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 1.5SMC12AHE3/57T reliable?
The price and inventory of 1.5SMC12AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC12AHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC12AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12AHE3/57T?
1.5SMC12AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12AHE3/57T 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 1.5SMC12AHE3/57T?
For technical support, including 1.5SMC12AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12AHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC12AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12AHE3/57T 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 1.5SMC12AHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC12AHE3/57T?
All 1.5SMC12AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12AHE3/57T, 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 1.5SMC12AHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC12AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12AHE3/57T Tags
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