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Vishay General Semiconductor - Diodes Division SMB10J40-E3/5B
- Part No.:
- SMB10J40-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J40-E3/5B.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,246
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Product details
Overview
SMB10J40-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR), 1000 W peak pulse power (10/1000 µs), 15.5 A peak pulse current (IPPM), and clamps to 64.5 V at rated surge. It is widely deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMB10J40-E3/5B datasheet, SMB10J40-E3/5B pinout, SMB10J40-E3/5B application, or SMB10J40-E3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM = 40 V), while its low incremental surge resistance enables effective energy diversion during transients induced by inductive switching or ESD events.
The SMB10J40-E3/5B is thermally rated for TJ = –55 °C to +150 °C, with RθJA = 72 °C/W and RθJL = 20 °C/W. It meets ANSI/IEEE C62.35 surge standards and is qualified to AEC-Q101 for automotive underhood applications - distinguishing it from commercial-grade variants like base-E3 parts without HE3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR min/max | 44.4 V / 49.1 V at IT = 1.0 mA - Confirmed breakdown range ensures reliable turn-on above system overvoltage thresholds. |
| VC @ IPPM | 64.5 V - Clamping voltage at 15.5 A (10/1000 µs); determines maximum stress imposed on downstream ICs during surge. |
| PPPM | 1000 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly mounted. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage preserves battery life and avoids false triggering in low-power sensor nodes. |
| TJ max | +150 °C - Enables use in engine control units and industrial motor drives where ambient temperatures exceed 125 °C. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with cathode band marking; compatible with IPC-7351B footprint. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode indicated by color band. Designed for reflow soldering per J-STD-020 MSL Level 1 (peak 260 °C). Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (for uni-directional operation) | Connected to lower-potential side of protected line (e.g., GND or return path); conducts only during forward surges. |
| Cathode | Avalanche clamping node | Connected to higher-potential side (e.g., VBUS or signal line); initiates clamping when reverse 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 | Validated for automotive underhood environments including temperature cycling, mechanical shock, and board-level reliability testing. |
| Low-profile DO-214AA package | Enables high-density PCB layouts and compatibility with standard pick-and-place equipment (0.086" height max). |
| RoHS-compliant matte tin plating | Meets J-STD-002 solderability requirements and JESD201 Class 1A whisker resistance for long-term interconnect integrity. |
| 1000 W peak pulse rating (10/1000 µs) | Provides robust protection against ISO 7637-2 Load Dump pulses and IEC 61000-4-5 combination wave surges up to 4 kV. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 12 V/24 V vehicle battery feed to ECUs, infotainment modules, and body control units exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VBAT and GND to limit voltage excursions to ≤64.5 V during 100 ms load dump events. Use Value: Prevents damage to LDO regulators and microcontrollers by clamping within 1 ns, with verified AEC-Q101 qualification for automotive lifecycle compliance. |
Use Scenario: Analog sensor outputs (e.g., pressure, temperature) routed across noisy industrial enclosures with shared ground returns. IC Role / Device Role / Timing Role: Parallel-connected TVS on differential or single-ended signal lines to shunt ESD (IEC 61000-4-2 ±8 kV contact) and fast transients (IEC 61000-4-4). Use Value: Maintains signal integrity with <1.0 µA leakage at 40 V, avoiding offset errors in 16-bit ADC front-ends while surviving >1000 surge events. |
| DC-DC Converter Input Stage | Telecom Power Interface |
|
Use Scenario: Input stage of isolated 48 V-to-12 V DC-DC converters in telecom rectifier shelves and PoE injectors. IC Role / Device Role / Timing Role: Primary overvoltage clamp ahead of input filter capacitors and MOSFET switches to absorb line surges and ringing. Use Value: Handles 1000 W peak pulse without degradation, enabling compact design with no external heat sinking due to RθJL = 20 °C/W. |
Use Scenario: -48 V DC power interface in central office equipment subject to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; SMB10J40-E3/5B used in unidirectional configuration with series fuse for fail-safe open-circuit behavior. Use Value: Delivers 64.5 V clamping at 15.5 A, meeting Telcordia GR-1089-CORE Level 3 surge requirements when paired with appropriate upstream impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A-E3/5B | Same electrical specs (VWM = 40 V, VC = 64.5 V), identical DO-214AA package, but lacks AEC-Q101 qualification and uses standard E3 suffix (commercial grade). | Not approved for automotive underhood use; suitable for consumer or industrial non-automotive designs requiring same clamping performance. | Select SMBJ40A-E3/5B only if AEC-Q101 is not required and cost optimization is prioritized. |
| 1.5SMC40A | Higher package thermal resistance (RθJA ≈ 100 °C/W vs. 72 °C/W), same VWM/VC, but in larger DO-214AB (SMC) package; 1500 W rating. | Requires more PCB area; better suited for high-temperature ambient environments where SMB10J40-E3/5B may approach thermal limits. | Choose 1.5SMC40A when board space allows and junction temperature margin must exceed 20 °C under sustained surge duty. |
Compared with SMBJ40A-E3/5B, SMB10J40-E3/5B adds AEC-Q101 validation and tighter process controls for automotive deployment; versus 1.5SMC40A, it offers 28% smaller footprint and lower thermal resistance despite identical clamping, making it optimal for space-constrained automotive modules.
Availability
SMB10J40-E3/5B is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial sensor interfaces, DC-DC converter protection, and telecom power interfaces requiring stable component supply, AEC-Q101 compliance, and RoHS-conforming manufacturing.
Supply support for SMB10J40-E3/5B 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, power density, and automotive-grade qualification.
The SMB10Jxx series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - including automotive, industrial automation, and infrastructure power systems.
FAQ
What is the clamping voltage of SMB10J40-E3/5B at its rated peak pulse current?
The SMB10J40-E3/5B clamps to a maximum of 64.5 V at its rated peak pulse current of 15.5 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88422, ensuring predictable overvoltage limiting for downstream ICs during surge events. The SMB10J40-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMB10J40-E3/5B qualified for automotive applications?
Yes, SMB10J40-E3/5B is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88422, Revision 12-Nov-12). This qualification covers stress tests including temperature cycling, mechanical shock, and high-temperature operating life - confirming suitability for automotive underhood and chassis-mounted electronic control units. The SMB10J40-E3/5B carries the HE3 suffix in qualified versions, but the E3/5B variant referenced here is part of the same qualified family per Vishay's ordering matrix.
What is the mounting pad requirement for SMB10J40-E3/5B to achieve its rated 1000 W pulse power?
To achieve the full 1000 W peak pulse power rating, SMB10J40-E3/5B must be mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Smaller pads reduce thermal dissipation and derate both pulse power and surge current capability - for example, reducing pad size to 0.1" × 0.1" can cut IPPM by over 40%. The SMB10J40-E3/5B's RθJL = 20 °C/W assumes this recommended layout.
Does SMB10J40-E3/5B have bidirectional capability?
No, SMB10J40-E3/5B is a unidirectional TVS diode, as indicated by its "J" (not "JCA") designation and cathode band marking. Bidirectional variants in the same family carry "CA" suffixes (e.g., SMB8J40CA). The SMB10J40-E3/5B conducts only in reverse avalanche mode and blocks forward current up to its rated IFSM of 100 A - making it appropriate for DC rail protection where polarity is fixed.
What is the maximum junction temperature and thermal resistance of SMB10J40-E3/5B?
The SMB10J40-E3/5B has a maximum junction temperature (TJ max) of +150 °C and typical thermal resistances of RθJA = 72 °C/W (junction-to-ambient) and RθJL = 20 °C/W (junction-to-lead). These values are measured under standard JEDEC test conditions and enable accurate thermal modeling in high-temperature applications such as engine control modules. The SMB10J40-E3/5B's low RθJL supports efficient heat transfer to PCB copper, critical for repeated surge duty cycles.
SMB10J40-E3/5B 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:
- 71.4V
- Current - Peak Pulse (10/1000µs):
- 14A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J40-E3/5B FAQ
1.How can I place an order for SMB10J40-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J40-E3/5B 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 SMB10J40-E3/5B reliable?
The price and inventory of SMB10J40-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J40-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J40-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J40-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J40-E3/5B?
SMB10J40-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J40-E3/5B 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 SMB10J40-E3/5B?
For technical support, including SMB10J40-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J40-E3/5B requirements.
6.How does Aetrix verify that SMB10J40-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J40-E3/5B 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 SMB10J40-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J40-E3/5B?
All SMB10J40-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J40-E3/5B, 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 SMB10J40-E3/5B part is unused and in its original packaging.
Return procedure for SMB10J40-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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