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Vishay General Semiconductor - Diodes Division SMBJ14AHM3_A/H
- Part No.:
- SMBJ14AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14AHM3_A/H.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,047
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Product details
Overview
SMBJ14AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ14AHM3_A/H datasheet, SMBJ14AHM3_A/H pinout, SMBJ14AHM3_A/H application, or SMBJ14AHM3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status (via HM3 suffix), 1.0 µA max reverse leakage at VWM, thermal resistance of 100 °C/W (junction-to-ambient), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, conducting only when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable avalanche behavior, low incremental surge resistance, and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The SMBJ14AHM3_A/H is halogen-free and RoHS-compliant (HM3 suffix), rated for -55 °C to +150 °C operating junction temperature, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It is not bidirectional - polarity is marked by cathode band, and forward voltage is ≤3.5 V at 50 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC bias margin for protected line |
| VBR min/max | 15.6 V / 17.2 V at 1 mA - guaranteed avalanche onset range; ensures consistent turn-on across production lots |
| VC @ IPPM | 23.2 V at 25.9 A - clamped voltage during 600 W transient; determines maximum stress on downstream ICs |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform; supports repetitive surge duty cycle of 0.01 % |
| IFSM | 100 A - non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against power rail faults |
| TJ max | +150 °C - maximum junction temperature; enables operation in high-ambient environments like motor control enclosures |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; completes clamping loop during transient conduction |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 12 V rail or sensor output); avalanche conduction initiates here when VIN > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without external series impedance |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics applications requiring zero-failure reliability under thermal cycling and vibration |
| Glass passivated chip junction | Ensures stable, repeatable avalanche characteristics over lifetime and prevents parameter drift due to moisture or contamination |
| MSL Level 1 (260 °C peak) | Supports single-reflow SMT assembly without pre-baking; eliminates moisture-related popcorning risk |
| Low 1.0 µA max reverse leakage at VWM | Minimizes standby power loss in battery-powered systems and avoids false triggering in high-impedance sensor circuits |
Applications
| Industrial Motor Drive Power Rails | Automotive Body Control Module (BCM) Inputs |
|---|---|
|
Use Scenario: Suppresses inductive kickback from relay coils and solenoid drivers on 12–24 V DC power distribution networks. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed across relay coil or MOSFET drain-source to limit flyback voltage to <24 V. Use Value: Prevents gate oxide damage to driving MOSFETs and latch-up in microcontrollers by limiting transient overshoot to 23.2 V at 25.9 A. |
Use Scenario: Protects LIN bus transceiver inputs and switch sense inputs in BCMs exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between input pin and ground to absorb 12 V system transients up to 600 W. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 5a (load dump) by clamping to 23.2 V while drawing <26 A peak current. |
| Consumer Appliance Sensor Interfaces | Telecom Power Supply Input Stage |
|
Use Scenario: Shields analog outputs of temperature/humidity sensors from ESD and cable discharge events in white goods. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) unidirectional TVS placed at sensor output node to ground, preserving signal accuracy. Use Value: Enables ±8 kV contact ESD protection per IEC 61000-4-2 without degrading 12-bit ADC resolution due to minimal leakage. |
Use Scenario: Guards AC-DC adapter primary-side rectifier outputs against lightning-induced surges entering via mains input. IC Role / Device Role / Timing Role: High-energy clamping device mounted across bulk capacitor terminals to clamp differential-mode transients. Use Value: Absorbs 600 W surges without failure, reducing need for upstream MOVs and simplifying Class II insulation coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14AHE3_A/H | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification; same electrical specs and SMB package | Restricted to commercial-grade industrial and consumer use; not approved for automotive under hood or chassis locations | Select when halogen-free content and automotive qualification are not required; lower cost alternative for non-automotive BOMs |
| SMAJ14A-HF | Lower 400 W PPPM; SMA (DO-214AC) package with smaller footprint and higher RθJA (140 °C/W) | Suitable only for lower-energy transients; requires larger copper area or forced cooling for equivalent thermal performance | Choose for space-constrained PCBs where 400 W surge immunity suffices and AEC-Q101 is unnecessary |
Compared with SMBJ14AHM3_A/H, SMBJ14AHE3_A/H offers identical clamping performance but excludes halogen-free and automotive qualification, while SMAJ14A-HF trades 33 % lower surge power and higher thermal resistance for 30 % smaller board area - making SMBJ14AHM3_A/H optimal for AEC-Q101–mandated, high-energy industrial and automotive applications.
Availability
SMBJ14AHM3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply input stages requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBJ14AHM3_A/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 compliance, and precise clamping are critical.
FAQ
What is the clamping voltage of SMBJ14AHM3_A/H at its rated peak pulse current?
The SMBJ14AHM3_A/H has a maximum clamping voltage (VC) of 23.2 V at its rated peak pulse current (IPPM) of 25.9 A, measured using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during a 600 W transient event and is confirmed in the Vishay datasheet Document Number 88392, page 2.
Is SMBJ14AHM3_A/H qualified for automotive applications?
Yes, SMBJ14AHM3_A/H is AEC-Q101 qualified, as indicated by the "HM3" suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It is validated for use in body electronics, infotainment, and power distribution modules where extended temperature operation (-55 °C to +150 °C) and reliability under thermal cycling are required.
What does the "HM3" suffix mean in SMBJ14AHM3_A/H?
The "HM3" suffix in SMBJ14AHM3_A/H specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., E3/M3) and confirms compliance with automotive material standards, including JESD 201 Class 2 whisker resistance and MSL Level 1 reflow capability.
Can SMBJ14AHM3_A/H be used in bidirectional signal line protection?
No, SMBJ14AHM3_A/H is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional protection (e.g., RS-485, USB, or CAN bus), Vishay specifies the CA-suffixed variant (e.g., SMBJ14CA). Using SMBJ14AHM3_A/H on AC-coupled or symmetrical signal lines would result in unintended forward conduction during negative transients.
What is the maximum reverse leakage current for SMBJ14AHM3_A/H at its stand-off voltage?
The SMBJ14AHM3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 14 V stand-off voltage (VWM), measured at 25 °C. This low leakage preserves signal integrity in high-impedance sensor circuits and minimizes quiescent power loss in battery-operated systems - a key design advantage over higher-leakage alternatives.
SMBJ14AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ14AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14AHM3_A/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 SMBJ14AHM3_A/H reliable?
The price and inventory of SMBJ14AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ14AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14AHM3_A/H?
SMBJ14AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14AHM3_A/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 SMBJ14AHM3_A/H?
For technical support, including SMBJ14AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ14AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ14AHM3_A/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 SMBJ14AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ14AHM3_A/H?
All SMBJ14AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14AHM3_A/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 SMBJ14AHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ14AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14AHM3_A/H Tags
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