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Vishay General Semiconductor - Diodes Division 1.5SMC12AHM3_A/I
- Part No.:
- 1.5SMC12AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12AHM3_A/I.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,389
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Product details
Overview
1.5SMC12AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 12 V breakdown voltage (VBR = 11.4–12.6 V at IT = 1.0 mA), 16.7 V maximum clamping voltage (VC) at 89.8 A peak pulse current, and 1500 W peak pulse power with 10/1000 µs waveform - deployed for overvoltage protection of power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the 1.5SMC12AHM3_A/I datasheet, 1.5SMC12AHM3_A/I pinout, 1.5SMC12AHM3_A/I application, or 1.5SMC12AHM3_A/I equivalent, this part delivers AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and verified clamping performance under repetitive surge conditions per IEC 61000-4-5.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient voltages above its standoff voltage (VWM = 10.2 V), limiting downstream circuit stress during ESD, lightning-induced surges, or inductive switching events. Its glass-passivated junction ensures stable leakage (<5.0 µA at VWM) and fast response time (<1.0 ns).
Designed for surface-mount assembly on standard PCB copper pads (8.0 mm × 8.0 mm per terminal), it sustains 200 A non-repetitive forward surge current (8.3 ms half-sine) and operates across –65 °C to +150 °C junction temperature range, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1.0 mA test current - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 10.2 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 16.7 V at 89.8 A - clamped voltage seen by protected circuit during full 1500 W transient event |
| IPPM | 89.8 A - peak pulse current capability with 10/1000 µs waveform, derated above 25 °C ambient |
| PPPM | 1500 W - surge power handling capacity compliant with IEC 61000-4-5 Level 4 immunity testing |
| ID @ VWM | <5.0 µA - ultra-low reverse leakage preserves low-power standby integrity in battery-backed systems |
| TJ max. | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side reference | Provides low-impedance path to ground during transient clamping; must be routed with minimal inductance |
| Cathode | Current exit point in forward bias; connected to line being protected (e.g., 12 V rail) | Acts as high-impedance node until VBR exceeded; band marking identifies this terminal on PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for engine control, ADAS, and body electronics |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and JEDEC J-STD-20; supports green manufacturing and end-of-life recycling requirements |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow without preconditioning; eliminates moisture-related popcorning risk during assembly |
| 1500 W peak pulse power (10/1000 µs) | Withstands severe transients per ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients - critical for protecting 3.3 V/5 V logic interfaces downstream |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 12 V supply inputs in engine control units against load dump transients up to 60 V and 100 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and DC-DC input stage to clamp surges before LDO or buck converter. Use Value: Limits voltage to ≤16.7 V during 89.8 A surge, preventing damage to downstream regulators rated for 20 V absolute maximum. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt fast transients (<1 ns rise time) before reaching op-amp input stage. Use Value: Sub-5 µA leakage at 10.2 V standoff preserves microamp-level loop accuracy; 16.7 V clamping avoids op-amp saturation. |
| Consumer USB Port Surge Suppression | Telecom Base Station DC Feed Protection |
Use Scenario: Safeguarding USB VBUS lines in portable docking stations exposed to hot-plug induced transients and contact ESD. IC Role / Device Role / Timing Role: Unidirectional TVS placed inline with VBUS trace, referenced to system ground, upstream of USB controller IC. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <17 V within nanoseconds, preserving USB 2.0 signal integrity and PHY latch-up immunity. |
Use Scenario: Protecting -48 V DC power feeds in 4G/5G remote radio units from lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: TVS array configured with 1.5SMC12AHM3_A/I on positive rail and complementary device on negative rail for bipolar suppression. Use Value: Withstands 1500 W surges while maintaining <10.2 V reverse standoff - compatible with telecom-grade -48 V nominal systems with ±15 % tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/57T | Same VBR range (11.4–12.6 V), lower PPPM = 400 W, SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 load dump | Select when board space is constrained and surge energy is ≤400 W; verify thermal margin at 125 °C ambient |
| 1.5KE12A | Through-hole DO-15 package, identical electrical specs but no AEC-Q101 qualification or MSL Level 1 rating | Not suitable for automated SMT production or automotive under-hood use; requires wave soldering | Choose only for legacy through-hole designs or cost-sensitive non-automotive industrial applications |
Compared with SMAJ12A-E3/57T and 1.5KE12A, the 1.5SMC12AHM3_A/I uniquely combines AEC-Q101 qualification, 1500 W surge rating, SMC package robustness, and halogen-free compliance - making it the sole option for new automotive SMT designs requiring full ISO 7637-2 and IEC 61000-4-5 immunity.
Availability
1.5SMC12AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, consumer USB power delivery systems, and telecom DC feed protection requiring stable component supply across extended product lifecycles.
Supply support for 1.5SMC12AHM3_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, 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 systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the 1.5SMC12AHM3_A/I under maximum surge conditions?
The 1.5SMC12AHM3_A/I exhibits a maximum clamping voltage (VC) of 16.7 V when subjected to its rated peak pulse current of 89.8 A with a 10/1000 µs waveform. This value is measured per Fig. 1 in the Vishay datasheet (Doc. #88303) and represents the upper voltage limit imposed on the protected circuit during worst-case transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the 1.5SMC12AHM3_A/I qualified for automotive applications?
Yes, the 1.5SMC12AHM3_A/I carries AEC-Q101 qualification, confirmed by the "HM3" suffix and documented in Vishay's ordering information table (page 3, Doc. #88303). It has undergone stress testing for temperature cycling, high-temperature reverse bias, and surge endurance - making it suitable for under-hood and chassis-mounted automotive modules including engine control, body electronics, and ADAS sensors.
What does the "_A/I" suffix mean in 1.5SMC12AHM3_A/I?
In 1.5SMC12AHM3_A/I, "HM3" denotes halogen-free and RoHS-compliant construction; "A" indicates AEC-Q101 qualification for the 6.8 V to 220 V voltage range; and "I" specifies packaging in 13-inch diameter tape-and-reel format with 3500 units per reel. This full suffix confirms compliance, qualification level, and logistics configuration - all verified in Vishay's ordering information table (page 3, Doc. #88303).
How does the 1.5SMC12AHM3_A/I compare to bidirectional TVS diodes like 1.5SMC12CA?
The 1.5SMC12AHM3_A/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground), offering tighter VBR tolerance and lower leakage than bidirectional variants. In contrast, 1.5SMC12CA provides symmetrical clamping for AC or floating lines but lacks the AEC-Q101 qualification and HM3 halogen-free status of the 1.5SMC12AHM3_A/I - making the latter preferred for automotive DC systems.
What is the maximum operating temperature for the 1.5SMC12AHM3_A/I?
The 1.5SMC12AHM3_A/I has a maximum junction temperature (TJ) rating of +150 °C and an operating storage temperature range of –65 °C to +150 °C. Its thermal resistance values - RθJA = 75 °C/W and RθJL = 15 °C/W - allow reliable operation in high-ambient environments such as automotive engine compartments or industrial motor drive enclosures when mounted on recommended 8.0 mm × 8.0 mm copper pads.
1.5SMC12AHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC12AHM3_A/I FAQ
1.How can I place an order for 1.5SMC12AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12AHM3_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 1.5SMC12AHM3_A/I reliable?
The price and inventory of 1.5SMC12AHM3_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 1.5SMC12AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC12AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12AHM3_A/I?
1.5SMC12AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12AHM3_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 1.5SMC12AHM3_A/I?
For technical support, including 1.5SMC12AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12AHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC12AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12AHM3_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 1.5SMC12AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC12AHM3_A/I?
All 1.5SMC12AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12AHM3_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 1.5SMC12AHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC12AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12AHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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