My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC12AHM3/H
- Part No.:
- 1.5SMC12AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12AHM3/H.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,004
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC12AHM3/H 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 to ≤16.7 V at 89.8 A peak pulse current (10/1000 µs), delivering 1500 W peak pulse power. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients in automotive and industrial control systems.
For engineers reviewing the 1.5SMC12AHM3/H datasheet, 1.5SMC12AHM3/H pinout, 1.5SMC12AHM3/H application, or 1.5SMC12AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, SMC (DO-214AB) surface-mount package, low clamping ratio (VC/VBR ≈ 1.32), 150 °C maximum junction temperature, and halogen-free RoHS-compliant construction with matte tin-plated leads.
Technical Context
The 1.5SMC12AHM3/H operates as a unidirectional avalanche diode, leveraging glass-passivated silicon junction technology for stable, repeatable clamping under repetitive surge conditions. Its 10/1000 µs waveform rating reflects standardized surge immunity testing per IEC 61000-4-5 and ANSI/IEEE C62.35.
It exhibits a low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of sub-microsecond transients. Thermal performance is defined by RθJA = 75 °C/W (on recommended 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W, supporting reliable operation up to TJ = 150 °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 operating voltage before leakage exceeds 5 µA |
| VC @ IPPM | ≤16.7 V at 89.8 A - clamped voltage during 1500 W surge, limiting stress on downstream components |
| PPPM | 1500 W - peak pulse power handling capability with 0.01% duty cycle, suitable for infrequent high-energy events |
| IFSM | 200 A - single half-sine surge rating (8.3 ms), supporting motor drive and relay coil suppression |
| TJ max | +150 °C - enables use in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode indicated by band; compliant with UL 94 V-0, MSL Level 1 (260 °C peak reflow), and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (reverse bias) | Connected to protected line; conducts during overvoltage to shunt energy to ground |
| Cathode | Current exit terminal (reverse bias) | Banded end; tied to system ground or lower-potential rail; defines unidirectional polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD47 |
| Halogen-free & RoHS-compliant | Meets JEDEC JS709E and IPC-1752A requirements; supports green manufacturing and end-of-life compliance |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges without degradation when properly mounted |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected ICs |
| Fast response time & low dynamic impedance | Sub-nanosecond turn-on and <1 Ω incremental surge resistance ensure effective transient capture before system damage |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs, body control modules, and lighting drivers from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients above 13.2 V. Use Value: Prevents permanent damage to microcontrollers and CAN transceivers during 12 V system surges up to ±100 V/50 ms. |
Use Scenario: Safeguarding analog outputs and digital I/O of pressure, temperature, and position sensors in PLCs and motor drives. IC Role / Device Role / Timing Role: Mounted across sensor supply and ground pins to absorb ESD and inductive kickback from nearby solenoids. Use Value: Maintains signal integrity by limiting transient voltage to ≤16.7 V, avoiding ADC saturation or GPIO latch-up. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side DC output protection in wall adapters and USB PD chargers exposed to mains-borne noise. IC Role / Device Role / Timing Role: Unidirectional clamping device on +5 V/+9 V/+12 V rails upstream of LDOs and USB controllers. Use Value: Absorbs 1500 W surges without failure, preserving adapter certification and preventing downstream component burnout. |
Use Scenario: Front-end protection on Ethernet PHY power and data lines in base station equipment and PoE injectors. IC Role / Device Role / Timing Role: Paired with common-mode chokes to suppress differential-mode surges on 48 V bias rails and MDI lines. Use Value: Enables compliance with ITU-T K.20/K.21 telecom surge standards while maintaining low capacitance (<100 pF). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12AHE3/A | Same VBR range (11.4–12.6 V) but SMB package (smaller footprint, lower PPPM = 600 W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is ≤1 kV |
| 1.5KE12A | Through-hole DO-201 package; identical electrical specs but higher thermal resistance (RθJA ≈ 100 °C/W) | Requires wave soldering; not compatible with automated SMT assembly | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ12AHE3/A and 1.5KE12A, the 1.5SMC12AHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, 1500 W surge capacity, and SMC package scalability-making it the preferred choice for production automotive and industrial SMT designs requiring long-term supply stability and regulatory compliance.
Availability
1.5SMC12AHM3/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, consumer power adapters, and telecom line cards requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for 1.5SMC12AHM3/H 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-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 1.5SMC12AHM3/H under maximum rated surge current?
The 1.5SMC12AHM3/H 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 per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and ensures downstream ICs experience minimal overvoltage stress during surge events. The 1.5SMC12AHM3/H maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC12AHM3/H suitable for automotive applications?
Yes, the 1.5SMC12AHM3/H is AEC-Q101 qualified and explicitly designated for automotive use via its "HM3" suffix (halogen-free, RoHS-compliant, AEC-Q101 qualified). It meets stress test requirements including temperature cycling, high-temperature reverse bias, and mechanical shock-making it appropriate for engine control units, ADAS sensors, and infotainment power rails. The 1.5SMC12AHM3/H is listed in Vishay's automotive-grade product portfolio with full qualification documentation.
What does the "H" in the 1.5SMC12AHM3/H part number indicate?
The final "H" in 1.5SMC12AHM3/H denotes the packaging configuration: 7-inch diameter plastic tape and reel, with 850 units per reel. This is confirmed in Vishay's ordering information table, where "H" corresponds to the delivery mode code for standard 7″ reels. The "HM3" prefix indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction, while "/H" specifies the physical packaging format for automated SMT placement.
How does the 1.5SMC12AHM3/H compare to bidirectional TVS diodes like 1.5SMC12CA?
The 1.5SMC12AHM3/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground), offering lower leakage and tighter VBR tolerance than bidirectional variants. In contrast, 1.5SMC12CA provides symmetrical clamping for AC or floating lines but has higher reverse leakage and slightly reduced surge margin. The 1.5SMC12AHM3/H is not interchangeable with 1.5SMC12CA without circuit redesign due to polarity dependency and different IV characteristics.
What is the maximum printed circuit board pad size recommended for optimal thermal performance of the 1.5SMC12AHM3/H?
Vishay specifies that the 1.5SMC12AHM3/H achieves its rated 1500 W peak pulse power and thermal resistance (RθJA = 75 °C/W) when mounted on minimum recommended copper pads of 0.31″ × 0.31″ (8.0 mm × 8.0 mm) per terminal. Reducing pad area increases junction temperature during surge events and may cause premature failure. The 1.5SMC12AHM3/H datasheet provides exact mounting layout dimensions in inches and millimeters on page 5.
1.5SMC12AHM3/H 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:
- 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/H FAQ
1.How can I place an order for 1.5SMC12AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12AHM3/H 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/H reliable?
The price and inventory of 1.5SMC12AHM3/H 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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC12AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12AHM3/H?
1.5SMC12AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12AHM3/H 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/H?
For technical support, including 1.5SMC12AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC12AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12AHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC12AHM3/H?
All 1.5SMC12AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12AHM3/H, 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/H part is unused and in its original packaging.
Return procedure for 1.5SMC12AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12AHM3/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
