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Vishay General Semiconductor - Diodes Division SMB10J26AHM3_B/H
- Part No.:
- SMB10J26AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J26AHM3_B/H.pdf
- Description:
- 1KW,26V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,134
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Product details
Overview
SMB10J26AHM3_B/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 1000 W peak pulse power (10/1000 µs), 26 V stand-off voltage (VWM), and 42.1 V clamping voltage (VC) at 23.8 A peak pulse current. It delivers automotive-grade reliability via AEC-Q101 qualification and halogen-free RoHS compliance, deployed on power rails and signal lines of engine control units and ADAS sensor interfaces.
For engineers reviewing the SMB10J26AHM3_B/H datasheet, SMB10J26AHM3_B/H pinout, SMB10J26AHM3_B/H application, or SMB10J26AHM3_B/H equivalent, key selection criteria include clamping performance under 10/1000 µs transients, thermal resistance (RθJA = 72 °C/W), unidirectional polarity marking, and AEC-Q101 qualification for automotive electronics design.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds 26 V (VWM), it avalanches to clamp transients at ≤42.1 V while diverting up to 23.8 A (IPPM) without damage. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM), and MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device features low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges (IEC 61000-4-5). Its SMB package provides 5.0 mm × 5.0 mm copper pad thermal dissipation per terminal, critical for sustaining repetitive surge events in automotive power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V automotive systems. |
| VBR min/max | 28.9 V / 31.9 V - Breakdown voltage range at 1.0 mA test current; ensures consistent avalanche initiation across temperature and unit variation. |
| VC @ IPPM | 42.1 V - Clamping voltage at 23.8 A peak pulse current (10/1000 µs); determines maximum stress imposed on protected ICs during surge. |
| PPPM | 1000 W - Peak pulse power handling capability; enables robust protection against ISO 7637-2 Pulse 1/2a/5a transients in vehicle networks. |
| IFSM | 100 A - Non-repetitive forward surge current (8.3 ms half-sine); supports protection against load dump events in alternator-regulated systems. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood environments with minimal derating. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance; informs PCB copper area requirements (0.2" × 0.2" pads) for thermal management. |
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 color band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (for unidirectional operation) | Connected to system ground or lower-potential rail; completes shunt path during reverse transient. |
| Cathode | Protected line connection (marked with band) | Connected to line being protected (e.g., 24 V supply or CAN_H); avalanche occurs between cathode and anode when VREV > VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain and chassis modules, supporting zero-failure field reliability requirements. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and enables use in Tier 1 automotive supply chains requiring material compliance documentation. |
| MSL Level 1, 260 °C peak reflow | Enables compatibility with standard lead-free SMT assembly processes without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift in harsh under-hood environments. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive 3.3 V or 5 V interface ICs downstream. |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Camera Module Signal Lines |
|---|---|
Use Scenario: Protects 24 V input rail of diesel/gasoline ECU against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point before DC/DC converter input. Use Value: Clamps 1000 W surges to ≤42.1 V, preventing overvoltage damage to upstream MOSFETs and controller ICs while maintaining <1.0 µA leakage at 26 V nominal. |
Use Scenario: Safeguards MIPI CSI-2 differential pairs and power pins in surround-view camera modules exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Point-of-load TVS on each signal/power line adjacent to connector, leveraging fast <1 ns response to suppress ESD pulses. Use Value: Limits transient voltage to 42.1 V within nanoseconds, preserving signal integrity and avoiding latch-up in image sensor and serializer ICs. |
| Body Control Module (BCM) LIN Bus | ADAS Radar Power Supply |
Use Scenario: Shields LIN transceiver power and data lines from battery reversal, jump-start spikes, and inductive switching noise in door modules. IC Role / Device Role / Timing Role: Unidirectional TVS on VCC and LIN bus line, oriented to block negative transients while allowing normal LIN signaling. Use Value: Provides 26 V stand-off with 42.1 V clamping, ensuring LIN physical layer remains functional during 100 V/50 ms transients per ISO 16750-2. |
Use Scenario: Protects 12 V supply rail of 77 GHz radar modules from ignition noise and coupled RF interference in front-end power distribution. IC Role / Device Role / Timing Role: Primary surge limiter on radar module's main input, coordinated with ceramic capacitors for broadband filtering. Use Value: Handles 1000 W pulses without degradation, maintaining RθJA = 72 °C/W thermal performance on compact BCM PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB10J26AHE3_B/H | Same electrical specs (VWM = 26 V, VC = 42.1 V, PPPM = 1000 W), but RoHS-compliant commercial grade (not halogen-free or AEC-Q101 qualified). | Limited to non-automotive industrial or consumer applications where AEC-Q101 and halogen-free compliance are not required. | Select when cost sensitivity outweighs automotive qualification needs and halogen restrictions do not apply. |
| SMBJ26A-M3/5B | Identical SMB package and core TVS parameters, but rated for 600 W PPPM (vs. 1000 W), lower IPPM (14.3 A), and no AEC-Q101 qualification. | Suitable for lower-energy transients (e.g., IEC 61000-4-2 ESD only), not recommended for ISO 7637-2 load dump or Pulse 5a. | Choose only for cost-constrained designs with verified lower surge energy profiles and no automotive qualification mandate. |
Compared with SMB10J26AHM3_B/H, SMB10J26AHE3_B/H offers identical protection performance without AEC-Q101 or halogen-free assurance, while SMBJ26A-M3/5B sacrifices 40% peak power handling and automotive qualification-making SMB10J26AHM3_B/H the sole option for full-spec automotive surge immunity.
Availability
SMB10J26AHM3_B/H is available at Aetrix Electronics and suitable for automotive power electronics, ADAS sensor protection, and industrial control systems requiring stable component supply with AEC-Q101 validation and halogen-free compliance.
Supply support for SMB10J26AHM3_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 and automotive-grade qualification.
The SMB10J series is engineered specifically for high-power transient suppression in 12 V/24 V automotive systems, balancing clamping performance, thermal robustness, and AEC-Q101 compliance for safety-critical ECUs and sensors.
FAQ
What is the clamping voltage of SMB10J26AHM3_B/H at its rated peak pulse current?
The SMB10J26AHM3_B/H has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 23.8 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMB10J26AHM3_B/H maintains this clamping performance across its specified operating temperature range (-55 °C to +150 °C), making it suitable for under-hood automotive applications.
Is SMB10J26AHM3_B/H suitable for protecting 24 V automotive power rails against load dump transients?
Yes, SMB10J26AHM3_B/H is explicitly designed for this use case. With a 26 V stand-off voltage (VWM), 1000 W peak pulse power rating, and AEC-Q101 qualification, it meets ISO 7637-2 Pulse 5a requirements for 24 V systems. Its 42.1 V clamping voltage ensures downstream DC/DC converters and controllers remain within safe operating limits during 100 V/400 ms load dump events. The SMB10J26AHM3_B/H also supports 100 A non-repetitive forward surge current, covering alternator-related transients.
How does the HM3 suffix in SMB10J26AHM3_B/H differ from the HE3 suffix?
The HM3 suffix in SMB10J26AHM3_B/H indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, whereas HE3 denotes RoHS-compliance and AEC-Q101 qualification but not halogen-free status. Both meet automotive reliability standards, but HM3 satisfies additional material restrictions required by certain Tier 1 OEMs and regional environmental mandates. The SMB10J26AHM3_B/H shares identical electrical characteristics and SMB package dimensions with its HE3 counterpart-only the material composition differs.
What is the thermal resistance and recommended PCB layout for SMB10J26AHM3_B/H?
The SMB10J26AHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To achieve this rating, the PCB must use minimum recommended pad layout per Vishay document 88422: 0.086" (2.18 mm) minimum pad width, 0.220" (5.59 mm) overall length reference, and adequate internal ground/power planes. Thermal vias under pads further reduce RθJA in high-reliability automotive designs. The SMB10J26AHM3_B/H's RθJL is 20 °C/W, confirming strong lead-to-board conduction.
Does SMB10J26AHM3_B/H support automated SMT placement and lead-free reflow?
Yes, SMB10J26AHM3_B/H is optimized for automated placement and lead-free reflow. It features a low-profile SMB (DO-214AA) package compatible with standard pick-and-place equipment, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and MSL Level 1 rating with a maximum peak reflow temperature of 260 °C. No baking is required prior to assembly. The SMB10J26AHM3_B/H's halogen-free construction and RoHS compliance ensure full alignment with modern electronics manufacturing standards for automotive and industrial production.
SMB10J26AHM3_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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 23.8A
- Power - Peak Pulse:
- 1000W (1kW)
- 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)
SMB10J26AHM3_B/H FAQ
1.How can I place an order for SMB10J26AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J26AHM3_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 SMB10J26AHM3_B/H reliable?
The price and inventory of SMB10J26AHM3_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 SMB10J26AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMB10J26AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J26AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J26AHM3_B/H?
SMB10J26AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J26AHM3_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 SMB10J26AHM3_B/H?
For technical support, including SMB10J26AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J26AHM3_B/H requirements.
6.How does Aetrix verify that SMB10J26AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB10J26AHM3_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 SMB10J26AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMB10J26AHM3_B/H?
All SMB10J26AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J26AHM3_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 SMB10J26AHM3_B/H part is unused and in its original packaging.
Return procedure for SMB10J26AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J26AHM3_B/H Tags
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