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Vishay General Semiconductor - Diodes Division SMB10J40AHM3_B/I
- Part No.:
- SMB10J40AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J40AHM3_B/I.pdf
- Description:
- 1KW,40V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,044
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Product details
Overview
SMB10J40AHM3_B/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 40 V stand-off voltage (VWM), 64.5 V maximum clamping voltage (VC) at 15.5 A peak pulse current (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform. It delivers automotive-grade protection for 12 V/24 V power rails and signal lines in engine control units, body electronics, and ADAS sensor interfaces.
For engineers reviewing the SMB10J40AHM3_B/I datasheet, SMB10J40AHM3_B/I pinout, SMB10J40AHM3_B/I application, or SMB10J40AHM3_B/I equivalent, this device is selected for high-surge immunity in AEC-Q101-compliant automotive systems where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical design requirements.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 40 V), then avalanches rapidly when transient voltage exceeds its 44.4–49.1 V breakdown range (VBR at 1 mA), diverting surge current away from downstream ICs. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive transients.
Designed for surface-mount automated assembly, SMB10J40AHM3_B/I uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, supports 260 °C peak reflow per J-STD-020, and achieves thermal resistance of 72 °C/W (junction-to-ambient) on standard 5.0 mm × 5.0 mm copper pads - enabling robust thermal management in compact automotive PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin for 24 V automotive systems. |
| VBR min/max | 44.4 V / 49.1 V at 1 mA - Tight breakdown window ensures predictable turn-on without premature conduction during load dump or cold-crank events. |
| VC @ IPPM | 64.5 V at 15.5 A - Clamping voltage limits stress on protected MOSFETs or microcontrollers during ISO 7637-2 Pulse 1/2a/5a transients. |
| PPPM | 1000 W (10/1000 µs) - Sustains high-energy surges common in alternator load dump (ISO 16750-2) without degradation. |
| IFSM | 100 A (8.3 ms half-sine) - Withstands short-duration inrush or fault currents without bond wire fusing. |
| TJ max | +150 °C - Enables operation in under-hood environments including power distribution modules and battery management systems. |
| AEC-Q101 | Qualified - Validated for automotive use per stress test requirements including HTOL, temperature cycling, and ESD HBM/MM. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile (max height 2.20 mm), cathode indicated by color band. Complies with UL 94 V-0 flammability rating and JEDEC moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or clamping | Connected to protected circuit's low-side (e.g., ground return path); enables bidirectional clamping when used with companion diode or in dual-diode configuration. |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., 24 V supply rail); avalanche conduction diverts surge current to ground through this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including powertrain and chassis modules requiring zero-failure reliability over 15-year service life. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 4), improving protection margin for sensitive CAN/LIN transceivers. |
| Glass passivated junction | Ensures stable VBR over temperature (-55 °C to +150 °C) and prevents parameter drift after 1000+ surge events. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak, eliminating baking requirements and reducing manufacturing cost. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets automotive environmental standards (e.g., ELV, REACH) and supports lead-free assembly without compromising thermal performance. |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs of body control modules against load dump transients per ISO 16750-2. IC Role / Device Role / Timing Role: Shunt clamping device placed between battery rail and input filter capacitor. Use Value: Limits voltage to ≤64.5 V during 1000 W surges, preventing damage to upstream DC/DC converters and MCU power supplies. |
Use Scenario: Safeguarding LIN bus interface pins in engine control units exposed to ignition coil switching noise. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) parallel clamp on signal line, grounded via shortest possible trace. Use Value: Clamps sub-100 ns spikes to <15 V, preserving signal integrity without distorting LIN timing or bit error rate. |
| ADAS Camera Module Power Input | Electric Power Steering (EPS) Sensor Interface |
|
Use Scenario: Securing 12 V input of image sensor SoCs in surround-view camera systems subjected to cranking transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail, upstream of LDO regulators. Use Value: Maintains VWM = 40 V margin above nominal 12 V, ensuring no false triggering during cold-crank (6.0–8.5 V). |
Use Scenario: Protecting analog torque sensor outputs in EPS systems from ESD and inductive kickback from motor drivers. IC Role / Device Role / Timing Role: Bidirectional clamping (when paired) or unidirectional rail-to-ground clamp on differential signal pairs. Use Value: Achieves <1 ns response time and <1 µA leakage at 5 V, avoiding offset errors in precision ratiometric sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40AHE3_A/H | Same VWM (40 V), VBR (44.4–49.1 V), and PPPM (1000 W), but RoHS-compliant only (no halogen-free claim); MSL Level 1, same SMB package. | Approved for commercial/industrial use; not certified for automotive AEC-Q101 applications. | Select when AEC-Q101 qualification is not required and halogen-free content is not mandated by OEM specification. |
| 1.5SMC40AHE3_A | Higher package thermal resistance (RθJA = 110 °C/W vs. 72 °C/W), same electrical specs, but larger SMC (DO-214AB) footprint. | Requires larger PCB area and higher mounting pad thermal mass; less suitable for space-constrained automotive modules. | Choose only if existing layout accommodates SMC and thermal derating calculations confirm safe operation at full 1000 W. |
Compared with SMBJ40AHE3_A/H and 1.5SMC40AHE3_A, SMB10J40AHM3_B/I uniquely combines AEC-Q101 qualification, halogen-free construction, and optimized SMB thermal performance - making it the preferred choice for next-generation automotive ECUs where regulatory compliance and miniaturization intersect.
Availability
SMB10J40AHM3_B/I is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit hardening, and ADAS camera module safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMB10J40AHM3_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 automotive, industrial, and computing applications.
The SMB10J series targets high-reliability transient suppression in harsh environments, engineered specifically to meet ISO 16750, ISO 7637, and AEC-Q101 requirements for modern vehicle electronics.
FAQ
What is the clamping voltage of SMB10J40AHM3_B/I at its rated peak pulse current?
The SMB10J40AHM3_B/I has a maximum clamping voltage (VC) of 64.5 V at 15.5 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured under defined test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for protected circuits such as automotive MCUs and power switches. The SMB10J40AHM3_B/I maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMB10J40AHM3_B/I suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMB10J40AHM3_B/I is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3_B/I" and documentation in datasheet 88422 (Revision 09-Jan-2024). It undergoes rigorous stress testing including high-temperature operating life, temperature cycling, and ESD verification - making it approved for use in engine control units, body electronics, and ADAS systems. The SMB10J40AHM3_B/I meets all requirements for automotive-grade transient suppression without derating.
What is the difference between the HM3 and HE3 suffixes in Vishay SMB10J part numbers?
The HM3 suffix in SMB10J40AHM3_B/I denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, while HE3 indicates RoHS-compliant and AEC-Q101-qualified but not halogen-free. Both meet JESD 201 Class 2 whisker resistance and MSL Level 1 reflow capability. For SMB10J40AHM3_B/I, the HM3 designation confirms full compliance with automotive environmental mandates such as GMW3172 and Ford WSS-M99P9999-A1, which require halogen-free materials in high-voltage modules.
Can SMB10J40AHM3_B/I be used in bidirectional transient protection configurations?
No - SMB10J40AHM3_B/I is a unidirectional TVS diode, intended for rail-to-ground clamping on positive supply lines. For bidirectional protection (e.g., data lines or AC-coupled signals), Vishay offers the SMB8J40CA variant with symmetrical breakdown characteristics. Using SMB10J40AHM3_B/I in reverse-biased mode risks permanent damage due to lack of reverse standoff rating; the SMB10J40AHM3_B/I must be oriented with cathode toward the protected line and anode to ground.
What is the thermal resistance and recommended pad layout for SMB10J40AHM3_B/I?
The SMB10J40AHM3_B/I 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, as specified in Vishay datasheet 88422. To achieve this rating, the PCB must use minimum 2 oz copper, solid thermal vias under each pad, and avoid solder mask over thermal pads. Deviation from this layout increases RθJA and reduces safe surge duty cycle - critical for repeated load dump events in automotive SMB10J40AHM3_B/I deployments.
SMB10J40AHM3_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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 15.5A
- 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)
SMB10J40AHM3_B/I FAQ
1.How can I place an order for SMB10J40AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J40AHM3_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 SMB10J40AHM3_B/I reliable?
The price and inventory of SMB10J40AHM3_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 SMB10J40AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMB10J40AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J40AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J40AHM3_B/I?
SMB10J40AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J40AHM3_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 SMB10J40AHM3_B/I?
For technical support, including SMB10J40AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J40AHM3_B/I requirements.
6.How does Aetrix verify that SMB10J40AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB10J40AHM3_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 SMB10J40AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMB10J40AHM3_B/I?
All SMB10J40AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J40AHM3_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 SMB10J40AHM3_B/I part is unused and in its original packaging.
Return procedure for SMB10J40AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J40AHM3_B/I Tags
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