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Vishay General Semiconductor - Diodes Division SMBJ15AHM3_B/I
- Part No.:
- SMBJ15AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15AHM3_B/I.pdf
- Description:
- 600W,15V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,836
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Product details
Overview
SMBJ15AHM3_B/I 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 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 24.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), protecting MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the SMBJ15AHM3_B/I datasheet, SMBJ15AHM3_B/I pinout, SMBJ15AHM3_B/I application, or SMBJ15AHM3_B/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This TVS diode operates as a unidirectional clamping device with a glass-passivated silicon junction, optimized for fast response (<1 ps) to ESD and lightning-induced surges. Its breakdown voltage (VBR) is specified at 16.7–18.5 V (IT = 1 mA), and it exhibits low incremental surge resistance to maintain stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
The SMBJ15AHM3_B/I uses an SMB (DO-214AA) package with matte tin-plated leads solderable per J-STD-002 and JESD22-B102, rated MSL Level 1 (260 °C peak reflow), and qualified to AEC-Q101 for automotive applications. Polarity is marked by a cathode band; no marking is used for bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum reverse working voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR min/max | 16.7 V / 18.5 V at IT = 1 mA - Confirmed breakdown threshold ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 24.4 V at 24.6 A - Clamping voltage limits downstream component stress during 600 W transient energy absorption. |
| PPPM | 600 W (10/1000 µs) - Peak pulse power rating validated per ANSI/IEEE C62.35; supports industrial surge immunity standards. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance measured on 0.2" × 0.2" copper pads; informs PCB thermal layout requirements. |
| TJ max | +150 °C - Maximum junction temperature enables operation in under-hood automotive and high-temperature industrial environments. |
| Leakage ID | 1.0 µA at VWM - Ultra-low reverse leakage preserves system efficiency and battery life in always-on circuits. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow). Cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; completes clamping loop during transient events. |
| Cathode | Clamping output / Protected line connection | Connected to protected line (e.g., 12 V rail or sensor input); conducts when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV surge) when properly laid out on PCB with adequate copper area. |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics where reliability under thermal cycling and vibration is mandatory. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and JESD201 Class 2 whisker resistance for long-term solder joint integrity. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive 3.3 V or 5 V logic interfaces. |
| Fast response time (<1 ps) | Clamps ESD events (IEC 61000-4-2) before damage occurs to downstream CMOS inputs or gate oxides. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply rails in automotive ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery input and DC/DC converter input stage. Use Value: Limits voltage to ≤24.4 V during 600 W surges, preventing overvoltage shutdown or destruction of upstream regulators. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Line-side transient suppressor on 4–20 mA or 0–10 V signal paths exposed to motor switching noise. Use Value: Maintains signal integrity by clamping induced spikes to <25 V while adding <1 pF capacitance-no bandwidth degradation. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Protection |
|
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Standoff-clamp TVS on +5 V or +9 V output rail to absorb coupling from primary-side MOSFET switching. Use Value: Prevents latch-up in connected SoCs by limiting transient excursions to 24.4 V with sub-nanosecond response. |
Use Scenario: DC power feed protection in PoE-powered base stations and remote radio units. IC Role / Device Role / Timing Role: Primary overvoltage guard on –48 V telecom supply bus subjected to lightning-induced common-mode surges. Use Value: Absorbs 600 W surges without degradation across 1000+ cycles, supporting GR-1089-CORE Level 3 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15AHE3_B/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks JESD201 Class 2 whisker rating. | Preferred for commercial-grade industrial equipment where halogen content is unrestricted. | Select SMBJ15AHE3_B/I if halogen-free requirement is waived and cost optimization is prioritized. |
| SMBJ15CAHM3_B/I | Bidirectional variant; symmetric VBR (16.7–18.5 V), same VC (24.4 V), but no polarity marking. | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN FD) where reverse polarity surges occur. | Choose SMBJ15CAHM3_B/I only when protecting bidirectional signals; not a drop-in replacement for unidirectional use. |
Compared with SMBJ15AHM3_B/I, the HE3 variant trades halogen-free construction for lower cost in non-automotive settings, while the CAHM3 variant adds bidirectional capability at the expense of polarity-specific placement flexibility-neither is pin-compatible without circuit review.
Availability
SMBJ15AHM3_B/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom DC feeder applications requiring stable component supply, AEC-Q101 qualification, and halogen-free compliance.
Supply support for SMBJ15AHM3_B/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, power handling, and automotive qualification.
The SMBJ series was engineered for robust 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 SMBJ15AHM3_B/I at its rated peak pulse current?
The SMBJ15AHM3_B/I has a maximum clamping voltage (VC) of 24.4 V at 24.6 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream components. The SMBJ15AHM3_B/I maintains this clamping performance across its full operating temperature range (–55 to +150 °C).
Is SMBJ15AHM3_B/I qualified for automotive applications?
Yes, SMBJ15AHM3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88392 (Revision 09-Jan-2024). This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock-making SMBJ15AHM3_B/I suitable for engine control, body electronics, and ADAS power domains.
What does the "HM3" suffix indicate in SMBJ15AHM3_B/I?
The "HM3" suffix in SMBJ15AHM3_B/I denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, and MSL Level 1 moisture sensitivity. It distinguishes this variant from "HE3" (RoHS only) and "E3" (commercial grade), confirming compliance with stringent environmental and reliability requirements for automotive and industrial use.
Can SMBJ15AHM3_B/I be used in bidirectional signal protection?
No-SMBJ15AHM3_B/I is a unidirectional TVS diode, with polarity marked by a cathode band. For bidirectional protection (e.g., RS-485, CAN), the SMBJ15CAHM3_B/I variant must be used. Substituting SMBJ15AHM3_B/I in bidirectional circuits risks open-circuit failure during negative transients, as it blocks conduction in reverse bias beyond VWM.
What is the thermal resistance of SMBJ15AHM3_B/I, and how does it affect PCB layout?
SMBJ15AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To sustain repetitive surges, designers must allocate ≥25 mm² of 2-oz copper per pad and avoid thermal isolation-undersized traces increase junction temperature and reduce surge endurance. The SMBJ15AHM3_B/I datasheet specifies derating curves for elevated ambient temperatures.
SMBJ15AHM3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 24.6A
- 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)
SMBJ15AHM3_B/I FAQ
1.How can I place an order for SMBJ15AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15AHM3_B/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 SMBJ15AHM3_B/I reliable?
The price and inventory of SMBJ15AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ15AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15AHM3_B/I?
SMBJ15AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15AHM3_B/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 SMBJ15AHM3_B/I?
For technical support, including SMBJ15AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15AHM3_B/I requirements.
6.How does Aetrix verify that SMBJ15AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ15AHM3_B/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 SMBJ15AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ15AHM3_B/I?
All SMBJ15AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15AHM3_B/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 SMBJ15AHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ15AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15AHM3_B/I Tags
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