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Vishay General Semiconductor - Diodes Division SMB10J40AHM3/I
- Part No.:
- SMB10J40AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J40AHM3/I.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,240
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Product details
Overview
SMB10J40AHM3/I 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), 40 V stand-off voltage (VWM), and 64.5 V maximum clamping voltage (VC) at 15.5 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines, MOSFET gate drivers, and industrial I/O interfaces against inductive switching transients.
For engineers reviewing the SMB10J40AHM3/I datasheet, SMB10J40AHM3/I pinout, SMB10J40AHM3/I application, or SMB10J40AHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 72 °C/W), 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 breakdown voltage range of 44.4–49.1 V at 1 mA test current, enabling precise overvoltage thresholding above its 40 V working voltage. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns), critical for protecting sensitive CMOS inputs.
The SMB10J40AHM3/I is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and operates across -55 °C to +150 °C junction temperature. Its low incremental surge resistance and MSL Level 1 moisture sensitivity support robust reflow compatibility without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe signal line bias margin. |
| VBR min/max | 44.4 V / 49.1 V at 1 mA - Confirmed breakdown threshold window; ensures reliable turn-on above VWM with process tolerance. |
| VC @ IPPM | 64.5 V at 15.5 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to sub-65 V level. |
| PPPM | 1000 W - Peak pulse power handling capability; supports high-energy transients common in automotive load-dump events. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage at rated stand-off voltage; prevents signal distortion or bias drift in precision analog paths. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; enables thermal design with known derating above 25 °C. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to protected circuit ground or low-side reference; conducts surge current to ground when cathode is biased above VBR. |
| Cathode | Clamping control terminal | Connected to protected line (e.g., CAN_H, LIN, sensor output); reverse-biased during normal operation, avalanches at VBR to clamp overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; supports use in engine control, ADAS, and body electronics. |
| Glass-passivated junction | Ensures stable VBR and low ID over lifetime and temperature; eliminates risk of junction degradation under repeated surge stress. |
| MSL Level 1 rating | Allows direct placement and reflow without baking; compatible with standard SMT assembly lines up to 260 °C peak. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental compliance requirements (IEC 61249-2-21); no brominated flame retardants or chlorine-based compounds. |
| Low profile SMB package | Height ≤ 2.2 mm; enables compact PCB layout in space-constrained modules such as automotive ECUs and industrial sensors. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from battery load dump and alternator ripple in vehicle cabins. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and chassis ground to limit transients to <65 V while preserving DC bias integrity. Use Value: Prevents latch-up or permanent damage to 5 V or 3.3 V sensor interface ICs during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding PLC digital input channels connected to 24 V industrial field wiring exposed to relay coil flyback and EMI coupling. IC Role / Device Role / Timing Role: Standoff-clamp protector on each input channel, absorbing >1 kV/100 Ω surges without affecting logic-level recognition. Use Value: Enables >100,000 surge cycles without parameter shift, reducing field failure rates in factory automation systems. |
| Motor Drive Gate Protection | Automotive Power Distribution |
|
Use Scenario: Shielding MOSFET gate drivers in BLDC motor inverters from Miller-induced spikes and shoot-through transients. IC Role / Device Role / Timing Role: Fast-response TVS placed directly at gate-source terminals to clamp dv/dt-induced overshoot below 20 V. Use Value: Eliminates false triggering and gate oxide stress, extending MOSFET lifetime in 48 V mild-hybrid traction systems. |
Use Scenario: Front-end protection of fuse box electronics and junction box controllers subjected to ISO 16750-2 supply voltage transients. IC Role / Device Role / Timing Role: Primary surge limiter on 12 V/24 V power rail inputs, coordinating with upstream fuses and downstream LDOs. Use Value: Maintains system uptime during cold-crank and jump-start events by limiting rail collapse to <45 V for >100 ms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40AHE3/A | Same VWM (40 V), same SMB package, but rated for 600 W PPPM (vs. 1000 W); lower IPPM (10.3 A vs. 15.5 A). | Not suitable for high-energy automotive load-dump scenarios requiring >800 W; acceptable for consumer-grade USB or UART protection. | Select SMB10J40AHM3/I where full 1000 W surge immunity is required per ISO 7637-2; choose SMBJ40AHE3/A only for cost-sensitive, lower-risk applications. |
| SMCJ40A-M3/86A | Higher-power SMC (DO-214AB) package with 1500 W PPPM, same VWM and VC (64.5 V), but larger footprint and 1.5× height. | Used where board space permits and higher surge margin is needed; incompatible with SMB footprints without redesign. | Choose SMB10J40AHM3/I for space-constrained automotive modules; select SMCJ40A-M3/86A only when additional surge headroom justifies PCB area increase. |
Compared with SMBJ40AHE3/A and SMCJ40A-M3/86A, the SMB10J40AHM3/I uniquely balances 1000 W surge capacity, AEC-Q101 qualification, and SMB footprint-making it optimal for next-generation automotive ECUs where power density and qualification rigor are both mandatory.
Availability
SMB10J40AHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and motor drive gate safeguarding requiring stable component supply, long-term lifecycle assurance, and traceable halogen-free sourcing.
Supply support for SMB10J40AHM3/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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMB10J series is engineered for high-power-density transient suppression in harsh environments, targeting AEC-Q101-compliant automotive subsystems and ruggedized industrial controls where clamping precision and surge endurance are critical.
FAQ
What is the clamping voltage of SMB10J40AHM3/I at its rated peak pulse current?
The SMB10J40AHM3/I exhibits a maximum clamping voltage (VC) of 64.5 V when subjected to its specified peak pulse current of 15.5 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for downstream 65 V-tolerant ICs. The SMB10J40AHM3/I maintains this clamping performance across its full operating temperature range.
Is SMB10J40AHM3/I suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMB10J40AHM3/I is explicitly AEC-Q101 qualified, as documented in Vishay's official datasheet (Document Number: 88422). The HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It has passed stress tests including high-temperature reverse bias, temperature cycling, and ESD per AEC-Q101 Rev D, making SMB10J40AHM3/I appropriate for engine control units, ADAS sensors, and body electronics.
How does the thermal resistance of SMB10J40AHM3/I affect PCB layout design?
The SMB10J40AHM3/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. This value assumes standard FR-4 PCB with no internal planes; designers must allocate adequate copper area and consider airflow or ambient temperature to avoid exceeding +150 °C junction limit during repetitive surge events. The SMB10J40AHM3/I's RθJL of 20 °C/W further supports heat conduction through leads into the PCB.
What is the reverse leakage current specification for SMB10J40AHM3/I at its stand-off voltage?
At its 40 V stand-off voltage (VWM), the SMB10J40AHM3/I guarantees a maximum reverse leakage current (ID) of 1.0 µA at 25 °C, per the manufacturer's electrical characteristics table. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and avoids loading effects on precision analog circuits. Leakage remains within specification across the full -55 °C to +150 °C operating range, validated per AEC-Q101 test conditions.
Does SMB10J40AHM3/I have a defined polarity marking, and how is it identified?
Yes, SMB10J40AHM3/I is a unidirectional TVS diode with polarity clearly marked: a single color band on the cathode end of the SMB (DO-214AA) package. This band aligns with industry-standard diode marking conventions and must be oriented toward the protected line (e.g., CAN_H, LIN, sensor output), while the anode connects to ground. No marking appears on bidirectional variants-confirming SMB10J40AHM3/I's unidirectional function via physical identification.
SMB10J40AHM3/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):
- 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/I FAQ
1.How can I place an order for SMB10J40AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J40AHM3/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/I reliable?
The price and inventory of SMB10J40AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMB10J40AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J40AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J40AHM3/I?
SMB10J40AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J40AHM3/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/I?
For technical support, including SMB10J40AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J40AHM3/I requirements.
6.How does Aetrix verify that SMB10J40AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMB10J40AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMB10J40AHM3/I?
All SMB10J40AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J40AHM3/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/I part is unused and in its original packaging.
Return procedure for SMB10J40AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J40AHM3/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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