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Vishay General Semiconductor - Diodes Division 1.5SMC15AHE3_A/I
- Part No.:
- 1.5SMC15AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC15AHE3_A/I.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,755
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Product details
Overview
1.5SMC15AHE3_A/I 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 15 V standoff voltage (VWM), 21.2 V clamping voltage (VC) at 70.8 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and DC power rail protection.
For engineers reviewing the 1.5SMC15AHE3_A/I datasheet, 1.5SMC15AHE3_A/I pinout, 1.5SMC15AHE3_A/I application, or 1.5SMC15AHE3_A/I equivalent, key selection criteria include clamping performance under 10/1000 µs transients, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and SMC (DO-214AB) package compatibility with automated SMT assembly.
Technical Context
This device operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to deliver fast response (<1 ns) and low incremental surge resistance. Its breakdown voltage (VBR) is specified at 14.3–15.8 V with 1 mA test current, and it maintains stable clamping up to 150 °C junction temperature.
The 1.5SMC15AHE3_A/I is rated for 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports RoHS-compliant and halogen-free construction (HE3 suffix), and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 12.8 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 14.3–15.8 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping) | 21.2 V at 70.8 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC-level survivability. |
| PPPM | 1500 W - Surge energy handling capacity under standardized 10/1000 µs waveform; enables protection against lightning-induced and inductive-switching spikes. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on recommended 8.0 mm × 8.0 mm copper pads; informs board-level thermal design for sustained reliability. |
| TJ max. | +150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive and high-temperature industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing; required for safety-critical vehicle subsystems. |
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. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point in unidirectional configuration | Connects to protected line (e.g., +12 V rail); conducts when transient exceeds VBR, shunting surge current to ground. |
| Anode | Reference/ground return path | Must be tied to low-impedance system ground or chassis; determines clamping reference level and affects layout-dependent inductance. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without cascaded staging. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress; eliminates risk of junction corrosion. |
| AEC-Q101 qualification (HE3 suffix) | Validates suitability for automotive applications including engine control units, ADAS sensors, and body electronics without additional qualification effort. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning during assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or relay bounce), improving protection margin for downstream MOSFETs and microcontrollers. |
Applications
| Automotive Sensor Interface | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor supply line and ground, clamping transients before they reach precision amplifier or ADC inputs. Use Value: Maintains signal integrity under ISO 16750-2 load dump (up to 35 V, 100 ms) and prevents latch-up or parametric shift in automotive-grade ICs. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input traces, positioned upstream of optocoupler or Schmitt-trigger input stage. Use Value: Limits transient voltage to ≤21.2 V during 100 A inductive switch-off events, preserving input stage reliability and reducing false triggering. |
| DC Power Rail Protection | USB/Serial Port ESD Clamp |
Use Scenario: Secondary surge suppression on regulated 5 V or 3.3 V rails feeding FPGAs, microcontrollers, or memory in industrial gateways and edge devices. IC Role / Device Role / Timing Role: Fast-acting shunt device parallel to bulk capacitance, activated only during overvoltage excursions exceeding VWM. Use Value: Prevents catastrophic failure of downstream ICs during hot-swap events or accidental 12/24 V misconnection while maintaining low standby leakage (<1 µA). |
Use Scenario: Board-level ESD protection for RS-232, RS-485, or USB 2.0 data lines in medical instrumentation and test equipment. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF at 0 V) unidirectional clamp on signal pair, referenced to local ground plane. Use Value: Passes IEC 61000-4-2 ±15 kV contact discharge without signal distortion or bit errors, due to sub-nanosecond response and minimal parasitic loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/57T | Same VWM (12.8 V) and VC (21.2 V), but lower PPPM (400 W); SMA package (DO-214AC), smaller footprint and higher RθJA (100 °C/W). | Not AEC-Q101 qualified; suitable for commercial-grade consumer or computing applications where space is constrained. | Select when board area is limited and automotive qualification is unnecessary; verify thermal margin under sustained surge duty. |
| 1.5KE15A | Through-hole TO-204AA (DO-41) package; identical electrical specs but higher mounting inductance and no AEC-Q101 rating. | Used in legacy industrial controls and prototyping; incompatible with automated SMT lines and high-vibration environments. | Choose only for hand-soldered repairs or cost-sensitive non-automotive designs where reflow compatibility is not required. |
Compared with SMAJ15A-E3/57T and 1.5KE15A, the 1.5SMC15AHE3_A/I delivers superior surge robustness (1500 W vs. 400 W or 1500 W with inferior thermal performance), guaranteed automotive qualification, and optimized SMT manufacturability - making it the preferred choice for production-grade automotive and industrial systems requiring zero requalification risk.
Availability
1.5SMC15AHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and DC power distribution units requiring stable component supply, AEC-Q101 compliance, and high-volume SMT assembly support.
Supply support for 1.5SMC15AHE3_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 diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be eliminated through AEC-Q101 qualification and robust thermal design.
FAQ
What is the clamping voltage of the 1.5SMC15AHE3_A/I under a 10/1000 µs surge?
The 1.5SMC15AHE3_A/I clamps to a maximum of 21.2 V when subjected to a 70.8 A peak pulse current with a 10/1000 µs waveform. This value is measured per industry-standard test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC15AHE3_A/I achieves this clamping performance while maintaining low incremental resistance, ensuring consistent protection across its operational lifetime.
Is the 1.5SMC15AHE3_A/I qualified for automotive applications?
Yes, the 1.5SMC15AHE3_A/I carries the HE3 suffix, indicating full AEC-Q101 qualification. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JS-001, validating its use in automotive powertrain, chassis, and body electronics. The 1.5SMC15AHE3_A/I is explicitly listed in Vishay's AEC-Q101 qualified product matrix for the 1.5SMC family.
What package does the 1.5SMC15AHE3_A/I use, and what are its mounting requirements?
The 1.5SMC15AHE3_A/I uses the SMC (DO-214AB) surface-mount package, with mechanical dimensions defined in Vishay document 88303. For optimal thermal performance and surge reliability, it must be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal. The 1.5SMC15AHE3_A/I supports lead-free reflow up to 260 °C (MSL Level 1) and requires no pre-baking.
How does the 1.5SMC15AHE3_A/I differ from bidirectional TVS diodes like 1.5SMC15CA?
The 1.5SMC15AHE3_A/I is unidirectional and features a cathode band for polarity identification, enabling asymmetric clamping ideal for DC power lines and single-polarity signal paths. In contrast, 1.5SMC15CA is bidirectional with symmetrical clamping in both directions and no polarity marking - suited for AC lines or differential buses. The 1.5SMC15AHE3_A/I offers tighter VBR tolerance and lower leakage in DC applications where reverse conduction must be blocked.
What is the maximum junction temperature rating for the 1.5SMC15AHE3_A/I?
The 1.5SMC15AHE3_A/I has a maximum junction temperature (TJ max.) of +150 °C, allowing reliable operation in under-hood automotive environments and enclosed industrial enclosures. Derating curves in the datasheet show that its peak pulse power capability decreases linearly above 25 °C ambient, and the 1.5SMC15AHE3_A/I must be thermally managed using adequate copper pour to maintain safe TJ under repetitive surge conditions.
1.5SMC15AHE3_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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- 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)
1.5SMC15AHE3_A/I FAQ
1.How can I place an order for 1.5SMC15AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC15AHE3_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 1.5SMC15AHE3_A/I reliable?
The price and inventory of 1.5SMC15AHE3_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 1.5SMC15AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC15AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC15AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC15AHE3_A/I?
1.5SMC15AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC15AHE3_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 1.5SMC15AHE3_A/I?
For technical support, including 1.5SMC15AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC15AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC15AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC15AHE3_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 1.5SMC15AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC15AHE3_A/I?
All 1.5SMC15AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC15AHE3_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 1.5SMC15AHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC15AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC15AHE3_A/I Tags
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