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Vishay General Semiconductor - Diodes Division SMB10J40AHE3_B/I
- Part No.:
- SMB10J40AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J40AHE3_B/I.pdf
- Description:
- 1KW,40V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,359
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Product details
Overview
SMB10J40AHE3_B/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 SMB10J40AHE3_B/I datasheet, SMB10J40AHE3_B/I pinout, SMB10J40AHE3_B/I application, or SMB10J40AHE3_B/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, activating when reverse voltage exceeds its 44.4–49.1 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns), enabling effective suppression of ESD and lightning-induced transients per IEC 61000-4-2/4-5.
Thermally, it sustains operation from –55 °C to +150 °C junction temperature, with RθJL = 20 °C/W enabling efficient heat transfer to PCB leads. The device is rated for 100 A non-repetitive forward surge (IFSM, 8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR min/max | 44.4 V / 49.1 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above system overvoltage thresholds. |
| VC @ IPPM | 64.5 V at 15.5 A - Clamping voltage during 10/1000 µs surge; limits protected circuit stress to ≤64.5 V. |
| PPPM | 1000 W (10/1000 µs) - Peak surge energy handling capacity; supports robust protection in automotive load-dump scenarios. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage at stand-off voltage; prevents signal integrity degradation in high-impedance sensor paths. |
| TJ max | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive environments. |
| RθJA | 72 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" pads; informs derating requirements above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to protected line's low-side reference (e.g., GND or signal return); completes clamping path during overvoltage. |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., CAN_H, LIN, sensor supply); conducts when transient exceeds VBR, shunting surge to anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| Glass passivated junction | Ensures stable VBR and low leakage across lifetime; eliminates risk of moisture-induced parameter drift in humid environments. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning - simplifies manufacturing and avoids BOM splits. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt surges - critical for protecting fast-switching MOSFETs and microcontroller I/O pins. |
| Unidirectional polarity | Enables DC-biased line protection (e.g., 12 V supply rails, sensor VCC) without blocking normal forward conduction. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping element placed between sensor output and ground, activated within nanoseconds upon overvoltage detection. Use Value: Limits transient voltage to ≤64.5 V, preventing damage to downstream ADC inputs and ensuring signal continuity during 1000 W surges. |
Use Scenario: Safeguarding RS-485 transceiver data lines in factory automation PLCs subjected to cable discharge and ground loop transients. IC Role / Device Role / Timing Role: Bidirectional-capable protection (via companion SMB8J40CA) or unidirectional clamp on VCC-supplied lines; placed adjacent to connector. Use Value: Maintains <1.0 µA leakage at 40 V, preserving bus bias stability while clamping 10/1000 µs surges to safe levels for transceiver ESD structures. |
| Automotive Power Distribution | MOSFET Gate Driver Protection |
Use Scenario: Guarding 12 V/24 V power distribution nodes in junction boxes against battery reverse connection and alternator load dump. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main supply rail; coordinated with upstream fuses and secondary TVS arrays. Use Value: Handles 1000 W peak pulse power and 100 A IFSM surge, meeting ISO 16750-2 load-dump test requirements without thermal runaway. |
Use Scenario: Shielding high-side N-channel MOSFET gate drivers in motor control inverters from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Low-inductance clamp between gate and source, limiting dV/dt-induced gate overvoltage during shoot-through events. Use Value: Achieves 64.5 V clamping at 15.5 A with <1 ns response, preventing gate oxide breakdown while maintaining driver timing integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A-E3/52 | Same SMB package, 40 V VWM, but rated for 600 W PPPM (10/1000 µs) and not AEC-Q101 qualified. | Restricted to commercial-grade industrial or consumer systems lacking automotive qualification requirements. | Select when cost sensitivity outweighs automotive compliance and lower surge energy (600 W vs. 1000 W) is acceptable. |
| 1.5SMC40A | Same 40 V VWM and 1000 W rating, but in larger SMC (DO-214AB) package (2.54 mm pitch vs. SMB's 2.29 mm), higher RθJA (50 °C/W). | Requires larger PCB footprint and offers inferior thermal performance on identical pad layouts. | Choose only if legacy board design mandates SMC footprint or higher surge margin beyond 1000 W is needed (up to 1500 W). |
Compared with SMBJ40A-E3/52 and 1.5SMC40A, SMB10J40AHE3_B/I delivers automotive-grade reliability in the smallest standardized surface-mount TVS footprint while sustaining full 1000 W surge capability - making it optimal for space-constrained, safety-critical vehicle subsystems.
Availability
SMB10J40AHE3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial I/O protection, and power distribution systems requiring stable component supply, AEC-Q101 compliance, and high-power transient suppression in compact SMB packages.
Supply support for SMB10J40AHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMB10JxxA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy, automotive-grade transient suppression in space-constrained SMT designs where clamping precision and qualification rigor are mandatory.
FAQ
What is the clamping voltage of SMB10J40AHE3_B/I at its rated peak pulse current?
The SMB10J40AHE3_B/I has a maximum clamping voltage (VC) of 64.5 V at 15.5 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuits during surge events and is confirmed in Vishay's Document Number 88422, page 2, unidirectional electrical characteristics table for SMB10J40A.
Is SMB10J40AHE3_B/I suitable for automotive applications?
Yes, SMB10J40AHE3_B/I is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88422, page 1, FEATURES section). Its qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making it suitable for engine control units, ADAS sensors, and body electronics where automotive-grade reliability is mandated.
What does the "HE3_B/I" suffix indicate in SMB10J40AHE3_B/I?
The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction; "B" is the revision code; and "I" specifies packaging in 13-inch diameter plastic tape and reel with 3200 units per reel. This ordering code aligns with Vishay's documented format in the ORDERING INFORMATION section (page 3 of Document Number 88422).
How does SMB10J40AHE3_B/I differ from bidirectional variants like SMB8J40CA?
SMB10J40AHE3_B/I is unidirectional, intended for DC-biased lines such as power rails or sensor outputs, whereas SMB8J40CA is bidirectional and suited for AC-coupled or symmetrical signal lines like USB or audio. The unidirectional version offers higher peak pulse power (1000 W vs. 800 W) and different clamping symmetry - a functional distinction confirmed in the primary characteristics table (page 1) and electrical characteristics tables (pages 2–3).
What is the thermal resistance of SMB10J40AHE3_B/I, and how does it affect layout?
SMB10J40AHE3_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 the THERMAL CHARACTERISTICS table (page 3). This value requires adequate copper area and thermal vias in high-power or high-ambient-temperature designs to maintain TJ ≤ 150 °C under repeated surges.
SMB10J40AHE3_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)
SMB10J40AHE3_B/I FAQ
1.How can I place an order for SMB10J40AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J40AHE3_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 SMB10J40AHE3_B/I reliable?
The price and inventory of SMB10J40AHE3_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 SMB10J40AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMB10J40AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J40AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J40AHE3_B/I?
SMB10J40AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J40AHE3_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 SMB10J40AHE3_B/I?
For technical support, including SMB10J40AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J40AHE3_B/I requirements.
6.How does Aetrix verify that SMB10J40AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB10J40AHE3_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 SMB10J40AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMB10J40AHE3_B/I?
All SMB10J40AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J40AHE3_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 SMB10J40AHE3_B/I part is unused and in its original packaging.
Return procedure for SMB10J40AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J40AHE3_B/I Tags
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