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Vishay General Semiconductor - Diodes Division 1.5SMC12AHE3_A/I
- Part No.:
- 1.5SMC12AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12AHE3_A/I.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,332
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Product details
Overview
1.5SMC12AHE3_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 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), and clamps transients to ≤16.7 V at 89.8 A peak pulse current (10/1000 µs), delivering 1500 W peak pulse power. It is AEC-Q101 qualified and housed in an SMC (DO-214AB) package - widely used in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the 1.5SMC12AHE3_A/I datasheet, 1.5SMC12AHE3_A/I pinout, 1.5SMC12AHE3_A/I application, or 1.5SMC12AHE3_A/I equivalent, this page provides verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and direct AEC-Q101-compliant alternatives for automotive-grade ESD and lightning surge protection design.
Technical Context
The 1.5SMC12AHE3_A/I operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to voltage transients and low incremental surge resistance. Its clamping voltage of 16.7 V at 89.8 A ensures reliable protection of downstream 12 V logic and power rails without overstressing ICs or MOSFETs.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = 150 °C. It meets J-STD-020 MSL Level 1 and is rated for repetitive 0.01% duty cycle surges, making it suitable for automotive load-dump and inductive switching scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at IT = 1 mA - defines precise avalanche onset threshold for predictable clamping initiation |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage exceeds 5 µA; sets safe DC bias margin |
| VC @ IPPM | ≤16.7 V at 89.8 A (10/1000 µs) - actual clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| IFSM | 200 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction during fault events |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC standard |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE > VBR |
| Anode (unbanded end) | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against ISO 7637-2 Pulse 5a (load dump) in 12 V systems |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, body electronics, and ADAS sensors |
| Glass-passivated junction | Ensures stable VBR and low leakage (<5 µA at VWM) across temperature and lifetime |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow assembly without preconditioning or special handling |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices |
Applications
| Automotive Engine Control Unit (ECU) | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protects microcontroller I/O and power supply inputs from load-dump transients (up to 35 V, 100 ms) and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input or MCU VDD pin. Use Value: Clamps surge to ≤16.7 V, preventing latch-up or permanent damage to 12 V-rated silicon while maintaining AEC-Q101 compliance. |
Use Scenario: Shields CAN transceiver pins (CANH/CANL) from ESD (IEC 61000-4-2 ±15 kV) and coupled noise on factory-floor wiring. IC Role / Device Role / Timing Role: Bidirectional-capable layout (though 1.5SMC12AHE3_A/I is unidirectional, used on VCC side); placed between transceiver VIO and local 12 V supply. Use Value: Limits voltage excursions to safe levels during fast transients, preserving signal integrity and meeting ISO 11898-2 EMC requirements. |
| Telecom Power Supply Input | Consumer Appliance Motor Driver |
Use Scenario: Guards AC/DC adapter output stage against lightning-induced surges entering via mains-connected telecom equipment. IC Role / Device Role / Timing Role: Primary-side TVS on +12 V DC output rail feeding PoE controller or PHY IC. Use Value: Absorbs 1500 W pulses without degradation, ensuring no secondary failure propagates to sensitive Ethernet PHY or PMIC. |
Use Scenario: Suppresses inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drum drive). IC Role / Device Role / Timing Role: Connected across motor terminals or between H-bridge high-side switch and ground. Use Value: Limits flyback voltage to <17 V, protecting MOSFETs rated for 20 V VDSS and avoiding gate oxide stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12AHE3/A | Same VWM (10.2 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 100 °C/W) | Limited to lower-energy transients; unsuitable for load-dump or high-repetition surges | Select when board space is constrained and surge energy is <400 W (e.g., USB port protection) |
| 1.5KE12A-E3/54 | Same VBR range, through-hole DO-201 package, identical PPPM (1500 W), but not AEC-Q101 qualified | Requires wave soldering; lacks automotive qualification and MSL Level 1 reflow support | Choose only for non-automotive industrial designs where manual assembly or legacy through-hole is required |
Compared with 1.5SMC12AHE3_A/I, SMAJ12AHE3/A trades surge robustness for compactness, while 1.5KE12A-E3/54 retains full power rating but sacrifices automotive qualification and SMT process compatibility - making 1.5SMC12AHE3_A/I the optimal choice for AEC-Q101-compliant, high-energy, surface-mount TVS deployment.
Availability
1.5SMC12AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU protection, industrial CAN bus interface hardening, and telecom power supply surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC12AHE3_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 automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and consistent clamping performance are critical.
FAQ
What is the clamping voltage of the 1.5SMC12AHE3_A/I under a 10/1000 µs surge?
The 1.5SMC12AHE3_A/I clamps to a maximum of 16.7 V when subjected to its rated peak pulse current of 89.8 A using the standardized 10/1000 µs waveform. This value is guaranteed across temperature and production lot, and directly determines the maximum overvoltage stress imposed on downstream components during transient events.
Is the 1.5SMC12AHE3_A/I suitable for automotive applications?
Yes - the 1.5SMC12AHE3_A/I carries full AEC-Q101 qualification, including testing for temperature cycling, high-temperature reverse bias (HTRB), and ESD. Its SMC package, MSL Level 1 rating, and operation up to +150 °C junction temperature make it appropriate for under-hood and body-control module deployments where reliability under thermal and mechanical stress is mandatory.
How does the 1.5SMC12AHE3_A/I differ from bidirectional variants like 1.5SMC12CAHE3_A/I?
The 1.5SMC12AHE3_A/I is unidirectional and features a cathode band for polarity-sensitive placement, whereas 1.5SMC12CAHE3_A/I is bidirectional with no polarity marking and symmetric clamping in both directions. The unidirectional version offers slightly tighter VBR tolerance and is preferred for DC rail protection; the bidirectional type suits AC-coupled or differential signal lines like RS-485 or CAN.
What is the maximum steady-state power dissipation of the 1.5SMC12AHE3_A/I?
The 1.5SMC12AHE3_A/I has a maximum steady-state power dissipation (PD) of 6.5 W at TA = 50 °C on an infinite heatsink. In typical PCB layouts with 8 mm × 8 mm copper pads per terminal, derating applies above 25 °C ambient - consult Figure 2 in the Vishay datasheet 88303 for exact thermal derating curves.
Does the 1.5SMC12AHE3_A/I meet RoHS and halogen-free requirements?
Yes - the "HE3" suffix denotes RoHS-compliant construction, and the "_A/I" ordering code specifies tape-and-reel packaging (3500 units per 13″ reel). While not explicitly halogen-free (that requires "HM3"), the 1.5SMC12AHE3_A/I complies with EU RoHS Directive 2011/65/EU and is compatible with lead-free reflow processes per J-STD-020.
1.5SMC12AHE3_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):
- 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_A/I FAQ
1.How can I place an order for 1.5SMC12AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12AHE3_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 1.5SMC12AHE3_A/I reliable?
The price and inventory of 1.5SMC12AHE3_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 1.5SMC12AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC12AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12AHE3_A/I?
1.5SMC12AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12AHE3_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 1.5SMC12AHE3_A/I?
For technical support, including 1.5SMC12AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC12AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12AHE3_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 1.5SMC12AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC12AHE3_A/I?
All 1.5SMC12AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12AHE3_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 1.5SMC12AHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC12AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12AHE3_A/I Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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