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Vishay General Semiconductor - Diodes Division SMBJ15AHM3/I
- Part No.:
- SMBJ15AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15AHM3/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
SMBJ15AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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 capability with 10/1000 µs waveform - used on power rails and signal lines of industrial sensors and automotive control modules.
For engineers reviewing the SMBJ15AHM3/I datasheet, SMBJ15AHM3/I pinout, SMBJ15AHM3/I application, or SMBJ15AHM3/I equivalent, this part serves as a halogen-free, RoHS-compliant, AEC-Q101 qualified TVS for robust overvoltage protection in space-constrained PCB layouts requiring high surge immunity and low leakage (<1.0 µA at VWM).
Technical Context
The SMBJ15AHM3/I operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown voltage (VBR = 16.7–18.5 V at 1.0 mA test current). Its glass-passivated junction ensures stable clamping performance and fast response time (<1 ns) to transient events.
Thermally, it exhibits RθJA = 100 °C/W (junction-to-ambient) and RθJL = 20 °C/W (junction-to-lead), enabling reliable operation up to TJ = +150 °C. The device meets MSL level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range on protected line |
| VBR (min/max) | 16.7 V / 18.5 V at 1.0 mA - guaranteed avalanche initiation window; ensures consistent turn-on across production lots |
| VC @ IPPM | 24.4 V at 24.6 A - clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels |
| PPPM | 600 W - peak pulse power handling capacity; supports repetitive 0.01% duty cycle surges without degradation |
| IFSM | 100 A - non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against accidental polarity reversal |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive and industrial environments |
| Leakage ID | ≤1.0 µA at VWM - ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge events |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12 V rail or sensor output); initiates clamping when reverse voltage exceeds 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 derating in standard PCB layouts |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets global environmental compliance requirements including JEDEC JESD201 Class 2 whisker resistance |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic interfaces |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: 12 V battery-supplied ECU power input subjected to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Limits clamped voltage to ≤24.4 V, preserving 28 V-rated input stages and preventing latch-up in downstream PMICs. |
Use Scenario: Analog output line (0–10 V) of a pressure sensor in factory automation exposed to relay coil flyback and ESD events. IC Role / Device Role / Timing Role: TVS connected between signal and ground to absorb sub-100 ns ESD pulses and longer inductive spikes. Use Value: Sub-1 ns response time and <1.0 µA leakage ensure no signal offset or bandwidth degradation during normal operation. |
| Telecom Interface Surge Suppression | Consumer USB Port Overvoltage Defense |
Use Scenario: RS-485 transceiver bus lines in outdoor base station equipment facing lightning-induced surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to local ground to suppress common-mode transients. Use Value: 600 W rating and 24.4 V clamping maintain signal integrity while meeting ITU-T K.21 Basic Protection Level requirements. |
Use Scenario: VBUS line of USB 2.0 port in smart home hub exposed to hot-plug transients and user-handling ESD. IC Role / Device Role / Timing Role: TVS placed between VBUS and GND to shunt >8 kV HBM ESD and 100 V/1 µs surges per IEC 61000-4-2. Use Value: Low capacitance (typ. 150 pF at 0 V) avoids USB 2.0 eye diagram distortion while providing certified system-level ESD immunity. |
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/I | Same electrical specs, but RoHS-compliant (E3) without halogen-free certification; no AEC-Q101 qualification | Suitable for commercial-grade industrial and consumer designs where automotive qualification is not required | Select when halogen-free content is not mandated and cost optimization is prioritized over automotive compliance |
| SMBJ15CAHM3/I | Bidirectional variant with symmetrical VBR (16.7–18.5 V), same package and clamping (24.4 V), but no polarity marking | Required for AC-coupled or floating signal lines (e.g., Ethernet PHY, audio differential pairs) where polarity reversal may occur | Choose only when protecting bidirectional signals; not interchangeable with SMBJ15AHM3/I due to fundamental polarity architecture |
Compared with SMBJ15AHE3/I, the SMBJ15AHM3/I adds halogen-free construction and AEC-Q101 qualification for automotive use; compared with SMBJ15CAHM3/I, it provides unidirectional clamping essential for DC-biased power rails and single-ended signal paths.
Availability
SMBJ15AHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom infrastructure, and consumer USB power protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ15AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series was developed for high-energy transient suppression in compact surface-mount formats, targeting automotive, industrial, and communications systems where space, surge robustness, and qualification compliance are critical.
FAQ
What is the clamping voltage of SMBJ15AHM3/I at its rated peak pulse current?
The SMBJ15AHM3/I has a maximum clamping voltage (VC) of 24.4 V at 24.6 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 standards and guarantees that downstream circuitry sees no more than 24.4 V during worst-case surge events, making SMBJ15AHM3/I suitable for protecting 24 V-rated ICs and interfaces.
Is SMBJ15AHM3/I qualified for automotive applications?
Yes, SMBJ15AHM3/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88392. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and surge robustness - validating SMBJ15AHM3/I for use in engine control units, body control modules, and ADAS sensor assemblies.
What does the "HM3" suffix indicate in SMBJ15AHM3/I?
The "HM3" suffix in SMBJ15AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from E3 (RoHS only) and HE3 (AEC-Q101 + RoHS but not halogen-free). The HM3 version meets JEDEC JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements for high-reliability deployments.
Can SMBJ15AHM3/I be used in bidirectional signal protection?
No, SMBJ15AHM3/I is strictly unidirectional and must be oriented with cathode toward the protected line. For bidirectional signal lines (e.g., RS-485, CAN, or AC-coupled analog), the SMBJ15CAHM3/I variant - with symmetrical breakdown in both directions - is required. Using SMBJ15AHM3/I on bidirectional paths risks failure during negative transients.
What is the thermal resistance of SMBJ15AHM3/I, and how does it affect layout design?
SMBJ15AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. To maintain TJ ≤ 150 °C under sustained 5.0 W power dissipation, PCB copper pad area must follow Vishay's recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal - undersized pads will cause premature thermal shutdown or parametric drift in SMBJ15AHM3/I performance.
SMBJ15AHM3/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):
- 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/I FAQ
1.How can I place an order for SMBJ15AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15AHM3/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/I reliable?
The price and inventory of SMBJ15AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMBJ15AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15AHM3/I?
SMBJ15AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15AHM3/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/I?
For technical support, including SMBJ15AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15AHM3/I requirements.
6.How does Aetrix verify that SMBJ15AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ15AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMBJ15AHM3/I?
All SMBJ15AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15AHM3/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/I part is unused and in its original packaging.
Return procedure for SMBJ15AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15AHM3/I Tags
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