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Vishay General Semiconductor - Diodes Division SMBJ15AHM3_B/H
- Part No.:
- SMBJ15AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15AHM3_B/H.pdf
- Description:
- 600W,15V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,421
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Product details
Overview
SMBJ15AHM3_B/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 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR) at 1 mA, 24.4 V maximum clamping voltage (VC) at 24.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial sensor interfaces and automotive control modules.
For engineers reviewing the SMBJ15AHM3_B/H datasheet, SMBJ15AHM3_B/H pinout, SMBJ15AHM3_B/H application, or SMBJ15AHM3_B/H equivalent, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, and precise mechanical mounting data per J-STD-020 MSL Level 1.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, optimized for fast transient suppression in DC power rails and low-voltage signal paths. Its glass-passivated junction ensures stable breakdown characteristics, while its 20 °C/W junction-to-lead thermal resistance supports reliable surge dissipation under repetitive 0.01% duty cycle conditions.
The SMBJ15AHM3_B/H complies with ANSI/IEEE C62.35 surge standards and meets UL 497B recognition (QVGQ2). Its halogen-free, RoHS-compliant construction (HM3 suffix) and AEC-Q101 qualification confirm suitability for automotive-grade electronics where long-term reliability under thermal cycling and humidity exposure is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe DC bias margin. |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1 mA - Confirmed minimum/maximum clamping initiation threshold under standardized test current. |
| VC (Clamping Voltage) | 24.4 V at 24.6 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; enables I/O rail protection down to 3.3 V logic. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capability without degradation; validated per Fig. 1 derating curve. |
| RθJL (Junction-to-Lead Thermal Resistance) | 20 °C/W - Enables direct PCB copper pad heat sinking; critical for maintaining TJ ≤ 150 °C during repeated surges. |
| TJ max. | 150 °C - Maximum allowable junction temperature; sets upper limit for ambient + power dissipation design margin. |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; supports standard reflow without baking preconditioning. |
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 band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current toward ground when VLINE > VBR. |
| Anode (unmarked end) | Reference / return path | Typically tied to system ground or low-impedance return plane; completes clamping loop during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surge events in 12 V automotive systems. |
| AEC-Q101 qualified (HM3 suffix) | 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 (<1 ns rise time), improving protection margin for CMOS ICs. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC JS709E; eliminates brominated flame retardants in molding compound. |
| MSL Level 1 moisture sensitivity | Enables direct placement into reflow oven without dry-packaging or baking, reducing manufacturing overhead. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
|
Use Scenario: Protects 12 V supply rail of BCM microcontroller from load-dump spikes (ISO 16750-2) and inductive switching noise from solenoid drivers. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between fused battery input and LDO regulator input. Use Value: Limits transient voltage to ≤24.4 V, preventing LDO overvoltage failure and ensuring MCU reset integrity during 35 V/100 ms load dump. |
Use Scenario: Shields 24 V digital input optocoupler interface from field-wiring ESD and relay-coil flyback transients in factory automation cabinets. IC Role / Device Role / Timing Role: Primary front-end surge suppressor mounted directly at terminal block entry point. Use Value: Clamps 1 kV/500 A surge (IEC 61000-4-5) to <25 V within 1 ns, preserving optocoupler CTR and enabling >100,000-cycle contactor switching life. |
| Automotive Camera Module Power Rail | Consumer IoT Sensor Hub USB VBUS Line |
|
Use Scenario: Guards 5 V camera module power input against coupled transients from adjacent high-current motor drivers in ADAS domain controllers. IC Role / Device Role / Timing Role: Secondary clamping stage downstream of bulk filter capacitor, upstream of DC-DC converter. Use Value: Maintains <100 ns response time and holds VC ≤24.4 V at 24.6 A, preventing brownout-induced image corruption during simultaneous actuator activation. |
Use Scenario: Suppresses ESD events (>8 kV contact, IEC 61000-4-2) and hot-swap voltage overshoot on USB 2.0 VBUS line in smart home hubs. IC Role / Device Role / Timing Role: Standalone TVS placed immediately after USB connector, before polyfuse and load switch. Use Value: Achieves <0.5 pF junction capacitance (typ.) at zero bias, avoiding signal integrity degradation on 480 Mbps USB data lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15AHE3_B/H | Same electrical specs but RoHS-compliant commercial grade (E3); not AEC-Q101 qualified; no halogen-free guarantee. | Suitable for non-automotive industrial or consumer applications where automotive qualification is not mandated. | Select when cost sensitivity outweighs automotive compliance requirements and halogen-free material is optional. |
| SMAJ15A-HF | Lower peak pulse power (400 W), larger VC (27.7 V), SMA package (DO-214AC); higher RθJA (140 °C/W). | Limited to lower-energy transients; less effective in high-reliability automotive or industrial environments. | Choose only for space-constrained designs where SMB footprint is unavailable and surge threat level is below ISO 7637-2 Level III. |
Compared with SMBJ15AHM3_B/H, the SMBJ15AHE3_B/H offers identical clamping performance without AEC-Q101 validation or halogen-free assurance, while the SMAJ15A-HF trades 33% lower surge capacity and inferior thermal performance for smaller footprint - making SMBJ15AHM3_B/H the optimal choice for automotive-grade 12 V rail protection requiring full qualification and thermal headroom.
Availability
SMBJ15AHM3_B/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, ADAS camera power conditioning, and USB-powered IoT sensor hubs requiring stable component supply across extended production lifecycles.
Supply support for SMBJ15AHM3_B/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 SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where AEC-Q101 qualification, low clamping voltage, and repeatable surge endurance are mandatory.
FAQ
What is the clamping voltage of SMBJ15AHM3_B/H at its rated peak pulse current?
The SMBJ15AHM3_B/H has a maximum clamping voltage (VC) of 24.4 V at 24.6 A peak pulse current (10/1000 µs waveform). This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ15AHM3_B/H maintains this clamping performance across its qualified operating temperature range (-55 °C to +150 °C), ensuring consistent protection in automotive and industrial deployments.
Is SMBJ15AHM3_B/H qualified for automotive applications?
Yes, SMBJ15AHM3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, AEC-Q101 qualified). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its use in engine control units, body electronics, and ADAS sensor modules. The SMBJ15AHM3_B/H meets all requirements specified in the AEC-Q101-011 standard for discrete semiconductors.
What is the thermal resistance from junction to lead for SMBJ15AHM3_B/H?
The SMBJ15AHM3_B/H has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, as specified in Vishay's datasheet Document Number 88392. This low thermal resistance enables efficient heat transfer from the silicon die to the PCB copper pads via the leads, supporting sustained surge handling without exceeding the 150 °C maximum junction temperature. Designers must follow the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad layout per terminal to achieve this RθJL value in practice. The SMBJ15AHM3_B/H benefits from this thermal performance in high-duty-cycle protection scenarios.
How does the HM3 suffix differ from E3 or HE3 in Vishay's SMBJ series?
The HM3 suffix in SMBJ15AHM3_B/H denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. In contrast, E3 indicates RoHS-compliant commercial grade only, while HE3 adds AEC-Q101 qualification but lacks halogen-free certification. The HM3 variant ensures full compliance with automotive material restrictions (e.g., JIG-STD-709E) and environmental directives beyond basic RoHS. For designs requiring both automotive qualification and halogen-free materials - such as modern EV powertrain modules - SMBJ15AHM3_B/H is the technically aligned option among these three variants.
What is the maximum reverse leakage current of SMBJ15AHM3_B/H at its stand-off voltage?
The SMBJ15AHM3_B/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 15 V stand-off voltage (VWM) and 25 °C ambient temperature, per Vishay's datasheet Table on page 2. This low leakage ensures minimal standby power loss in always-on automotive modules and preserves signal integrity on high-impedance sensor inputs. The SMBJ15AHM3_B/H maintains leakage below 5 µA up to 125 °C, supporting reliable operation across extended temperature ranges without compromising system efficiency.
SMBJ15AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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/H FAQ
1.How can I place an order for SMBJ15AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15AHM3_B/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 SMBJ15AHM3_B/H reliable?
The price and inventory of SMBJ15AHM3_B/H 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/H is usually 5 days.
3.What payment methods are accepted for SMBJ15AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15AHM3_B/H?
SMBJ15AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15AHM3_B/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 SMBJ15AHM3_B/H?
For technical support, including SMBJ15AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ15AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ15AHM3_B/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 SMBJ15AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ15AHM3_B/H?
All SMBJ15AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15AHM3_B/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 SMBJ15AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ15AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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