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Vishay General Semiconductor - Diodes Division SMBJ14AHM3/I
- Part No.:
- SMBJ14AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14AHM3/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,189
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Product details
Overview
SMBJ14AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 14 V stand-off voltage (VWM), 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current (IPPM), and 600 W peak pulse power capability with a 10/1000 µs waveform-commonly deployed to safeguard MOSFET gate drivers and microcontroller I/O in industrial motor controls.
For engineers reviewing the SMBJ14AHM3/I datasheet, SMBJ14AHM3/I pinout, SMBJ14AHM3/I application, or SMBJ14AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification status (HM3 suffix), halogen-free RoHS compliance, low incremental surge resistance, and verified clamping performance under repetitive transients in automotive body electronics and telecom power interfaces.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, leveraging a glass-passivated silicon junction to deliver sub-nanosecond response time and stable breakdown behavior across -55 °C to +150 °C junction temperature. Its design targets fast-rising ESD and inductive switching transients-such as those from relay coils or solenoid drivers-where precise VWM/VBR margin and low leakage (<1.0 µA at 14 V) are critical for system reliability.
The SMBJ14AHM3/I is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits a typical thermal resistance of 20 °C/W (junction-to-lead), enabling effective heat dissipation when mounted on 5.0 mm × 5.0 mm copper pads. Its MSL Level 1 rating (peak reflow 260 °C) ensures compatibility with standard SMT assembly processes without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; sets safe DC rail margin for 12 V systems. |
| VBR min/max | 15.6 V / 17.2 V at 1.0 mA - Confirmed breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 23.2 V at 25.9 A - Clamping voltage limits downstream IC stress during 600 W surge events; enables 3.3 V/5 V logic protection with headroom. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity testing. |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); withstands high-energy inductive kickback in automotive load-dump scenarios. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood or enclosed industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with cathode band marking; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes clamping path during reverse transient events. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 12 V rail or sensor output); conducts avalanche current to anode when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including body control modules and infotainment power supplies, with extended temperature and life-cycle testing. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU and global markets without compromising surge robustness or thermal performance. |
| 600 W peak pulse power (10/1000 µs) | Provides proven immunity against IEC 61000-4-5 surges up to 4 kV (line-earth) in properly laid-out PCBs with recommended pad geometry. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during clamping-critical for protecting 16 V-rated MOSFETs and 5 V logic interfaces in real-time control systems. |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and pre-baking steps during high-volume SMT manufacturing. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs and switch sense lines from load dump and alternator ripple in BCMs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fused 12 V rail and microcontroller GPIO or CAN transceiver VCC. Use Value: Limits transient voltage to ≤23.2 V during 100 A load dump events, preventing latch-up or permanent damage to 3.3 V/5 V interface ICs. |
Use Scenario: Shielding 24 V digital input channels from inductive kickback generated by solenoid valves and relay coils. IC Role / Device Role / Timing Role: Standoff-clamp device installed at field-side connector entry point, upstream of optocoupler input stage. Use Value: Clamps 600 W transients within 1 ns, maintaining <1 µA leakage at 24 V nominal to avoid false triggering of Schmitt-trigger inputs. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Driver Protection |
|
Use Scenario: Safeguarding AC/DC adapter secondary-side 12 V outputs against lightning-induced surges entering via Ethernet or PoE lines. IC Role / Device Role / Timing Role: Secondary-side TVS on regulated DC bus, coordinated with primary-side MOV and common-mode chokes. Use Value: Provides fast, low-capacitance (<100 pF) clamping without degrading 100 kHz–1 MHz switching noise filtering performance. |
Use Scenario: Suppressing commutation spikes on brushed DC motor H-bridge supply rails in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-mounted TVS across motor terminals and/or across bridge supply pins to absorb back-EMF energy. Use Value: Withstands 100 A single-pulse surges and maintains stable VC across 1000+ cycles-ensuring long-term reliability in high-duty-cycle appliances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14AHE3/I | Same electrical specs and SMB package, but RoHS-compliant commercial grade (not AEC-Q101 qualified); no halogen-free certification. | Approved for industrial and consumer designs where automotive qualification is not required; lower cost for non-automotive BOMs. | Select SMBJ14AHE3/I when AEC-Q101 is unnecessary and halogen-free content is not mandated by end-market regulations. |
| SMAJ14A-M3/5B | Lower peak pulse power (400 W vs. 600 W); SMA (DO-214AC) package with smaller footprint and higher thermal resistance (RθJA = 140 °C/W). | Suitable for space-constrained, lower-energy applications like USB port protection or low-power sensor nodes-not for 12 V automotive or industrial 24 V systems. | Choose SMAJ14A-M3/5B only if board area is critical and surge threat level is limited to IEC 61000-4-2 ESD or low-energy transients. |
Compared with SMBJ14AHE3/I and SMAJ14A-M3/5B, the SMBJ14AHM3/I uniquely combines AEC-Q101 qualification, halogen-free compliance, and full 600 W surge capability in the robust SMB outline-making it the preferred choice for automotive-grade and high-reliability industrial deployments requiring traceable, lifecycle-managed components.
Availability
SMBJ14AHM3/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, telecom power front-ends, and appliance motor control systems requiring stable component supply across multi-year production cycles.
Supply support for SMBJ14AHM3/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, automotive qualification, and application-specific performance.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where consistent clamping, thermal stability, and long-term parametric drift control are mandatory.
FAQ
What is the clamping voltage of SMBJ14AHM3/I at its rated peak pulse current?
The SMBJ14AHM3/I has a maximum clamping voltage (VC) of 23.2 V at its specified peak pulse current (IPPM) of 25.9 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and confirms the device's ability to limit transient overvoltage to a safe level for downstream 3.3 V or 5 V ICs. The SMBJ14AHM3/I datasheet specifies this parameter under test condition TA = 25 °C with mounting on 0.2" × 0.2" copper pads.
Is SMBJ14AHM3/I suitable for automotive applications?
Yes, SMBJ14AHM3/I is AEC-Q101 qualified and explicitly designated for automotive use, as confirmed by the "HM3" suffix indicating halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It is commonly deployed in body control modules, lighting drivers, and infotainment power supplies where operation from -40 °C to +125 °C ambient and resistance to load dump transients are required. The SMBJ14AHM3/I meets all stress tests defined in AEC-Q101, including high-temperature operating life and unbiased highly accelerated stress testing.
What does the "HM3" suffix mean in SMBJ14AHM3/I?
The "HM3" suffix in SMBJ14AHM3/I denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction-distinguishing it from commercial-grade variants like "E3" or "M3". This suffix confirms compliance with automotive environmental and reliability standards, including JESD201 Class 2 whisker resistance and MSL Level 1 reflow capability. The SMBJ14AHM3/I ordering code also indicates tape-and-reel packaging (I = 13" reel, 3200 units), facilitating automated SMT placement in high-volume production.
How does SMBJ14AHM3/I differ from SMBJ14AHE3/I?
The SMBJ14AHM3/I and SMBJ14AHE3/I share identical electrical characteristics-including VWM = 14 V, VC = 23.2 V, and PPPM = 600 W-but differ in qualification and material content. SMBJ14AHM3/I is halogen-free and AEC-Q101 qualified; SMBJ14AHE3/I is RoHS-compliant but lacks AEC-Q101 validation and halogen-free certification. Both use the same SMB (DO-214AA) package and are pin-compatible. The SMBJ14AHM3/I is required for automotive Tier 1 BOMs, while SMBJ14AHE3/I serves commercial/industrial applications.
What is the maximum operating temperature for SMBJ14AHM3/I?
The SMBJ14AHM3/I has a maximum junction temperature (TJ) rating of +150 °C and an operating junction and storage temperature range of -55 °C to +150 °C. Its thermal resistance from junction to lead (RθJL) is 20 °C/W, enabling reliable operation in high-ambient environments such as engine compartments or sealed industrial enclosures-provided PCB layout follows Vishay's recommended 5.0 mm × 5.0 mm copper pad dimensions per terminal. The SMBJ14AHM3/I maintains full electrical specifications across this full range.
SMBJ14AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 25.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ14AHM3/I FAQ
1.How can I place an order for SMBJ14AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14AHM3/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 SMBJ14AHM3/I reliable?
The price and inventory of SMBJ14AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14AHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ14AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14AHM3/I?
SMBJ14AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14AHM3/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 SMBJ14AHM3/I?
For technical support, including SMBJ14AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14AHM3/I requirements.
6.How does Aetrix verify that SMBJ14AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ14AHM3/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 SMBJ14AHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ14AHM3/I?
All SMBJ14AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14AHM3/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 SMBJ14AHM3/I part is unused and in its original packaging.
Return procedure for SMBJ14AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14AHM3/I Tags
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