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Vishay General Semiconductor - Diodes Division SMB10J40AHM3_A/I
- Part No.:
- SMB10J40AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J40AHM3_A/I.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,990
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Product details
Overview
SMB10J40AHM3_A/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, power rails, and MOSFET gate drivers against inductive switching transients.
For engineers reviewing the SMB10J40AHM3_A/I datasheet, SMB10J40AHM3_A/I pinout, SMB10J40AHM3_A/I application, or SMB10J40AHM3_A/I equivalent, key selection criteria include clamping performance under 10/1000 µs surges, AEC-Q101 qualification status, unidirectional polarity, thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds its breakdown threshold (44.4–49.1 V at 1 mA), it avalanches rapidly (<1 ns response) to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable leakage (<1 µA at 40 V) and long-term reliability under repeated transients.
Thermally, it relies on PCB copper pad area (0.2" × 0.2") for heat dissipation, with RθJL = 20 °C/W to lead and RθJA = 72 °C/W to ambient. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction-critical for automotive under-hood and ADAS sensor modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping onset. |
| VBR min/max | 44.4 V / 49.1 V at 1 mA - Breakdown voltage range confirming robust avalanche initiation tolerance across production lots. |
| VC @ IPPM | 64.5 V at 15.5 A - Clamping voltage during full 1000 W surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 1000 W (10/1000 µs) - Peak surge energy handling capacity; validates suitability for ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 threats. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage at rated stand-off; minimizes standby power loss in battery-critical systems. |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 2.20 mm height and 5.59 mm length; compatible with J-STD-020 MSL level 1 reflow. |
Pinout & Package
SMB10J40AHM3_A/I uses a 2-terminal SMB (DO-214AA) package with cathode indicated by a color band on the body. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes low-inductance surge current loop with minimal trace length. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails. |
| Low incremental surge resistance | Enables tighter clamping (64.5 V) at 15.5 A, reducing voltage overshoot on sensitive 3.3 V/5 V logic interfaces. |
| Glass passivated junction | Ensures stable VBR and low leakage over temperature (-55 °C to +150 °C) and lifetime cycling. |
| MSL level 1 rating | Supports standard SMT reflow without moisture sensitivity concerns-no baking required prior to assembly. |
| Halogen-free & RoHS-compliant (HM3) | Fulfills automotive OEM environmental requirements and enables use in sealed, high-reliability modules. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground, clamping transients before they reach ESD-hardened transceiver inputs. Use Value: Limits voltage excursion to ≤64.5 V during 1000 W surges, preserving signal integrity and preventing latch-up in 5 V-tolerant receivers. |
Use Scenario: Safeguarding microcontroller GPIOs and optocoupler inputs connected to relay coils or solenoid drivers in PLC I/O modules. IC Role / Device Role / Timing Role: Standoff-rated (40 V) TVS absorbing repetitive 8.3 ms half-sine surges up to 100 A peak forward surge current (IFSM). Use Value: Prevents false triggering and input damage during frequent coil de-energization, extending controller uptime in factory automation. |
| Automotive Power Rail Protection | Consumer DC Power Input Stage |
Use Scenario: Secondary surge suppression on 5 V or 12 V power distribution networks feeding ADAS camera modules and radar processors. IC Role / Device Role / Timing Role: Parallel-connected TVS providing fast-response clamping (sub-ns) after primary LC filtering, complementing upstream fuses and inductors. Use Value: Maintains regulated rail stability during ISO 7637-2 Pulse 5a (load dump), limiting overvoltage to <65 V for downstream LDOs and PMICs. |
Use Scenario: Input-stage transient protection on USB-C PD adapters and wall-mounted smart home hubs accepting 9–24 V DC input. IC Role / Device Role / Timing Role: First-line defense against EFT (IEC 61000-4-4) and surge (IEC 61000-4-5) events entering via external power cables. Use Value: Withstands ≥1000 surges at rated PPPM without parameter shift, ensuring multi-year field reliability in consumer-grade power supplies. |
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), VC (64.5 V), and PPPM (1000 W); differs in packaging (E3 vs HM3) and AEC-Q101 documentation scope. | E3 suffix indicates RoHS-compliant commercial grade only-not explicitly AEC-Q101 certified in all test reports. | Select when automotive qualification is not mandatory and cost optimization is prioritized. |
| 1.5SMC40A | Same electrical specs but in larger SMC (DO-214AB) package; RθJA = 40 °C/W vs 72 °C/W, requiring larger PCB copper area. | Higher thermal mass supports higher average surge duty cycles but occupies ~30% more board space. | Choose for industrial applications needing enhanced thermal derating margin and less stringent size constraints. |
Compared with SMB10J40AHM3_A/I, SMBJ40AHE3_A/H offers identical clamping and surge ratings but lacks explicit AEC-Q101 validation in its base certification, while 1.5SMC40A trades compact SMB footprint for superior thermal performance at the expense of layout area-making SMB10J40AHM3_A/I optimal for space-constrained, automotive-grade designs.
Availability
SMB10J40AHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive inputs, and consumer DC power input stage applications requiring stable component supply, AEC-Q101 compliance, and consistent 1000 W surge capability.
Supply support for SMB10J40AHM3_A/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 reliability, automotive qualification, and high-power density packaging.
The SMB10JxxA series targets high-reliability transient suppression in automotive and industrial environments, engineered for low-profile SMT assembly, rapid response, and robustness under harsh thermal and electrical stress.
FAQ
What is the clamping voltage of SMB10J40AHM3_A/I at its rated peak pulse current?
The SMB10J40AHM3_A/I has a maximum clamping voltage (VC) of 64.5 V at its rated peak pulse current (IPPM) of 15.5 A, measured under the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full 1000 W transient event and is confirmed in Vishay's Document Number 88422, page 2.
Is SMB10J40AHM3_A/I qualified for automotive applications?
Yes, SMB10J40AHM3_A/I is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88422, page 1). The "HM3" suffix denotes halogen-free, RoHS-compliant construction with full AEC-Q101 validation-including temperature cycling, humidity bias HAST, and mechanical shock testing-making it suitable for under-hood and ADAS applications.
What does the "HM3" suffix mean in SMB10J40AHM3_A/I?
The "HM3" suffix in SMB10J40AHM3_A/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms compliance with automotive environmental and reliability standards, including JESD 201 Class 2 whisker resistance and MSL level 1 reflow capability.
Can SMB10J40AHM3_A/I be used in bidirectional configurations?
No, SMB10J40AHM3_A/I is a unidirectional TVS diode, as confirmed by its part number structure (no "C" suffix) and electrical specifications listing only unidirectional parameters (e.g., IFSM = 100 A, no bidirectional VC or IPPM values). For bidirectional protection, Vishay offers the SMB8J40CA variant with symmetric clamping in both polarities.
What is the thermal resistance of SMB10J40AHM3_A/I, and how does it affect layout?
SMB10J40AHM3_A/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 requires adequate PCB copper area to avoid thermal runaway during repetitive surges; reducing pad size increases RθJA and necessitates derating per Figure 2 in the Vishay datasheet.
SMB10J40AHM3_A/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:
- Obsolete
- 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_A/I FAQ
1.How can I place an order for SMB10J40AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J40AHM3_A/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_A/I reliable?
The price and inventory of SMB10J40AHM3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMB10J40AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J40AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J40AHM3_A/I?
SMB10J40AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J40AHM3_A/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_A/I?
For technical support, including SMB10J40AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J40AHM3_A/I requirements.
6.How does Aetrix verify that SMB10J40AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB10J40AHM3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMB10J40AHM3_A/I?
All SMB10J40AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J40AHM3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMB10J40AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J40AHM3_A/I Tags
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ESD9B5.0ST5G
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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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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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