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Vishay General Semiconductor - Diodes Division SMB10J40AHE3/52
- Part No.:
- SMB10J40AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J40AHE3/52.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,664
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Product details
Overview
SMB10J40AHE3/52 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 gates, and IC power rails against inductive switching transients.
For engineers reviewing the SMB10J40AHE3/52 datasheet, SMB10J40AHE3/52 pinout, SMB10J40AHE3/52 application, or SMB10J40AHE3/52 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, 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 silicon avalanche device with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to limit transient overvoltage before sensitive downstream components are stressed. Its breakdown voltage range is 44.4–49.1 V at 1 mA test current, ensuring reliable triggering above system operating voltage while maintaining low leakage (<1 µA at 40 V).
The SMB10J40AHE3/52 is rated for -55 °C to +150 °C junction temperature, meets MSL level 1 per J-STD-020, and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Its unidirectional configuration requires cathode-band orientation during PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse working voltage before significant leakage; defines upper limit of normal circuit operation. |
| VBR min/max | 44.4 V / 49.1 V at 1 mA - Ensures consistent avalanche initiation across production lots; guarantees turn-on margin above VWM. |
| VC @ IPPM | 64.5 V at 15.5 A - Clamping voltage during 10/1000 µs surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 1000 W - Peak pulse power handling capability; enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports protection during high-current inductive kick events. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs thermal derating above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). RoHS-compliant, halogen-free option available (HM3 suffix), AEC-Q101 qualified (HE3/HM3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., GND or return path) in unidirectional configuration; carries surge current during clamping. |
| Cathode (marked) | Avalanche breakdown terminal | Connected to protected line (e.g., 12 V rail or sensor output); initiates clamping when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules requiring zero-failure field performance. |
| MSL Level 1 rating | Permits unlimited floor life and reflow at 260 °C peak without moisture-induced damage. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic interfaces. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting analog outputs of pressure, temperature, or position sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and ground, clamping transients before they reach ADC input or op-amp buffer. Use Value: Prevents sensor signal corruption and ADC saturation during ISO 16750-2 load-dump events up to 35 V, leveraging 40 V VWM and 64.5 V VC. | Use Scenario: Safeguarding microcontroller GPIOs and optocoupler inputs connected to relay or contactor feedback signals in PLC I/O modules. IC Role / Device Role / Timing Role: Transient suppressor on digital input lines subject to inductive kick from 24 V DC solenoid coils. Use Value: Absorbs 1000 W surges without degradation, enabling reliable detection of contactor state changes even after repeated 100 A inductive switch-offs. |
| Automotive Power Rail Protection | Consumer Device USB Port Protection |
Use Scenario: Guarding 12 V supply rails feeding infotainment head units and telematics ECUs against battery line transients. IC Role / Device Role / Timing Role: Primary TVS on main power input, positioned upstream of DC/DC converters and LDOs. Use Value: Withstands 100 A IFSM and maintains clamping below 65 V, preventing overvoltage shutdown of downstream PMICs during ISO 7637-2 Pulse 5a. | Use Scenario: Protecting USB 2.0 data lines (D+/D−) and VBUS in portable medical monitors and smart home hubs from ESD and cable discharge events. IC Role / Device Role / Timing Role: Discrete unidirectional TVS on VBUS line only (not data lines), providing bulk overvoltage defense prior to linear charger IC. Use Value: Delivers 1000 W surge capacity and <1 µA leakage at 40 V, avoiding interference with USB enumeration while blocking 12 V+ surges from faulty chargers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A-E3/52 | Same SMB package, identical VWM/VC, but not AEC-Q101 qualified; RθJA = 75 °C/W vs. 72 °C/W. | Commercial-grade only; unsuitable for automotive Tier-1 designs requiring AEC-Q101 evidence. | Select when cost sensitivity outweighs automotive qualification requirements and thermal margin allows 3 °C/W higher RθJA. |
| 1.5SMC40A | Larger SMC (DO-214AB) package; same electrical specs but 1.5× footprint area and 1000 W rating; RθJA = 60 °C/W. | Higher thermal performance but incompatible with dense layouts constrained to SMB pad dimensions. | Choose when board space permits larger footprint and enhanced thermal dissipation is critical for high-duty-cycle surge environments. |
Compared with SMBJ40A-E3/52 and 1.5SMC40A, SMB10J40AHE3/52 uniquely combines AEC-Q101 qualification, SMB footprint, and optimized thermal resistance-making it the preferred choice for space-constrained automotive electronics where qualification and reliability are non-negotiable.
Availability
SMB10J40AHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interface protection, industrial motor drive input conditioning, and consumer USB VBUS safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMB10J40AHE3/52 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 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments including automotive power systems and industrial controls.
FAQ
What is the clamping voltage of SMB10J40AHE3/52 at its rated peak pulse current?
The SMB10J40AHE3/52 has a maximum clamping voltage (VC) of 64.5 V at 15.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream components such as automotive MCUs or analog front-ends.
Is SMB10J40AHE3/52 suitable for automotive applications?
Yes, SMB10J40AHE3/52 is AEC-Q101 qualified and manufactured with automotive-grade process controls. Its HE3 suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified status, making SMB10J40AHE3/52 appropriate for engine control, body electronics, and ADAS subsystems where reliability under thermal and vibration stress is mandatory.
What is the standoff voltage (VWM) and why does it matter for SMB10J40AHE3/52?
The standoff voltage (VWM) of SMB10J40AHE3/52 is 40 V - the maximum DC or continuous reverse voltage the device can block without entering avalanche conduction. This parameter ensures SMB10J40AHE3/52 remains inactive during normal 12 V or 24 V automotive system operation while reliably triggering only during transient overvoltages exceeding ~44.4 V.
How does the SMB10J40AHE3/52 differ from bidirectional TVS diodes like SMB8J40CA?
SMB10J40AHE3/52 is unidirectional and intended for DC circuits with defined polarity (e.g., 12 V rail to ground), whereas SMB8J40CA is bidirectional and suited for AC or differential signal lines. SMB10J40AHE3/52 offers 1000 W peak pulse power vs. 800 W for SMB8J40CA, and includes AEC-Q101 qualification - a distinction not shared by the SMB8JxxCA series in this document.
What PCB layout guidance applies to SMB10J40AHE3/52 for optimal thermal and electrical performance?
For optimal performance, SMB10J40AHE3/52 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Trace width should match pad size, avoid acute angles, and maintain cathode-band orientation. Thermal vias under pads improve heat dissipation, especially critical given RθJA = 72 °C/W and 150 °C max junction temperature.
SMB10J40AHE3/52 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J40AHE3/52 FAQ
1.How can I place an order for SMB10J40AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J40AHE3/52 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 SMB10J40AHE3/52 reliable?
The price and inventory of SMB10J40AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J40AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB10J40AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J40AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J40AHE3/52?
SMB10J40AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J40AHE3/52 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 SMB10J40AHE3/52?
For technical support, including SMB10J40AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J40AHE3/52 requirements.
6.How does Aetrix verify that SMB10J40AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB10J40AHE3/52 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 SMB10J40AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB10J40AHE3/52?
All SMB10J40AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J40AHE3/52, 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 SMB10J40AHE3/52 part is unused and in its original packaging.
Return procedure for SMB10J40AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J40AHE3/52 Tags
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