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Vishay General Semiconductor - Diodes Division SMB10J40A-E3/5B
- Part No.:
- SMB10J40A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J40A-E3/5B.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB10J40A-E3/5B 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 protects MOSFETs, ICs, and sensor signal lines in automotive powertrain and industrial motor control systems against inductive switching transients.
For engineers reviewing the SMB10J40A-E3/5B datasheet, SMB10J40A-E3/5B pinout, SMB10J40A-E3/5B application, or SMB10J40A-E3/5B equivalent, key selection criteria include clamping performance under 10/1000 µs surges, AEC-Q101 qualification status, thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to limit transient overvoltage before damage occurs. Its breakdown voltage range is 44.4 V to 49.1 V at 1 mA test current, ensuring reliable triggering above system operating voltage while maintaining low leakage (<1.0 µA at 40 V).
The SMB10J40A-E3/5B is rated for -55 °C to +150 °C junction temperature, meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002. It is not bidirectional - polarity is marked by cathode band, and it is not rated for bidirectional surge handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - maximum continuous reverse working voltage; ensures no conduction during normal 36–40 V rail operation in 36 V automotive systems. |
| VBR min/max | 44.4 V / 49.1 V - breakdown occurs within this range at 1 mA; guarantees robust margin above VWM for noise immunity and temperature drift. |
| VC @ IPPM | 64.5 V - clamps 10/1000 µs surges up to 15.5 A; limits downstream voltage stress to safe levels for 48 V-rated logic and gate drivers. |
| PPPM | 1000 W - peak pulse power rating; supports high-energy transients from solenoid de-energization or load dump in 12/24/36 V vehicle subsystems. |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage at rated stand-off; prevents measurable power loss or bias shift in high-impedance sensor interfaces. |
| TJ max | +150 °C - enables use in engine bay or under-hood modules without derating in ambient up to +125 °C with proper PCB thermal design. |
| RθJA | 72 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs thermal layout requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case meeting UL 94 V-0 flammability rating. Cathode indicated by color band on body end.
| 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 chassis); must be routed with low-inductance trace to handle 15.5 A transient peaks. |
| Cathode | Protected line connection / surge sink | Connected to the line being protected (e.g., 36 V supply rail or sensor output); color band identifies this terminal for correct orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications per stress test requirements including HTOL, TC, and ESD - enables direct use in ASIL-B systems without additional qualification. |
| Glass passivated junction | Eliminates moisture sensitivity and enhances long-term reliability under thermal cycling; supports >1000 reflow cycles without degradation of VBR or VC. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak - compatible with standard lead-free SMT assembly without dry-pack or baking. |
| Low profile SMB package | Height ≤ 2.20 mm enables use in space-constrained modules (e.g., ECU housings, battery management sensors) while maintaining 1000 W surge capability. |
| Matte tin-plated leads | Ensures solder joint integrity per J-STD-002 and whisker resistance per JESD 201 Class 2 - critical for vibration-prone automotive environments. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protecting 36 V supply rails feeding high-side gate drivers in 48 V mild-hybrid DC/DC converters during load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between rail and ground, triggered within <1 ns to limit voltage overshoot below 65 V. Use Value: Prevents gate oxide rupture in SiC MOSFET drivers by holding transient voltage below absolute maximum rating during ISO 7637-2 Pulse 5a surges. |
Use Scenario: Safeguarding analog feedback signals (e.g., current sense outputs) in servo amplifier PCBs exposed to IGBT switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transient energy from ±15 V op-amp inputs to ground before propagation into ADC front-end. Use Value: Maintains signal integrity with <1.0 µA leakage at 15 V, avoiding offset drift while clamping sub-100 ns spikes to <20 V. |
| On-Board Charger (OBC) Interface | Commercial HVAC Sensor Hub |
|
Use Scenario: Shielding CAN FD communication lines (CANH/CANL) from coupled transients during AC/DC rectifier switching in EV OBC modules. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on each line referenced to chassis ground, leveraging fast response to suppress EFT bursts. Use Value: Enables compliance with CISPR 25 Class 5 emissions while preserving signal edge rate due to low junction capacitance (<100 pF at 0 V). |
Use Scenario: Guarding RS-485 transceiver I/O pins in distributed HVAC controller nodes mounted near compressors and contactors. IC Role / Device Role / Timing Role: Line-to-ground TVS on differential pair, activated only during >44.4 V common-mode surges to avoid false triggering during normal 12 V operation. Use Value: Extends field lifetime by eliminating latent damage from repetitive 500 V/μs transients induced by nearby relay coil de-energization. |
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 SMB package, identical VWM (40 V) and VC (64.5 V), but lower PPPM (600 W vs. 1000 W); uses different die construction. | Not suitable for high-energy load dump; limited to lower-duty-cycle surges such as ESD or EFT. | Select SMB10J40A-E3/5B when protecting 36 V systems subject to ISO 7637-2 Pulse 5a (1000 W requirement); choose SMBJ40A-E3/5B only for cost-sensitive consumer-grade designs with lower surge exposure. |
| SMCJ40A-E3/57 | Same electrical specs (VWM = 40 V, VC = 64.5 V, PPPM = 1500 W), but larger SMC (DO-214AB) package (4.5 mm × 3.9 mm vs. 3.9 mm × 3.3 mm). | Requires PCB redesign due to 30% larger footprint and higher thermal mass; better suited for heatsinked industrial modules. | Choose SMB10J40A-E3/5B for space-constrained automotive modules where SMB footprint is fixed; select SMCJ40A-E3/57 only when board area allows and higher thermal dissipation is needed for repetitive surge duty. |
Compared with SMBJ40A-E3/5B and SMCJ40A-E3/57, SMB10J40A-E3/5B uniquely delivers 1000 W surge capability in the smallest standardized SMB outline - enabling AEC-Q101-compliant protection without sacrificing board density or requiring layout revision.
Availability
SMB10J40A-E3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive control, on-board charger interface, and commercial HVAC sensor hub applications requiring stable component supply across extended production lifecycles.
Supply support for SMB10J40A-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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMB10J series is engineered specifically for high-power-density transient suppression in harsh-environment automotive and industrial systems, emphasizing AEC-Q101 qualification, low-profile packaging, and repeatable clamping performance under thermal stress.
FAQ
What is the clamping voltage of SMB10J40A-E3/5B at its rated peak pulse current?
The SMB10J40A-E3/5B 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 downstream components see no more than 64.5 V during worst-case surge events, making SMB10J40A-E3/5B suitable for protecting 48 V-rated ICs and gate drivers in automotive applications.
Is SMB10J40A-E3/5B qualified for automotive use?
Yes, SMB10J40A-E3/5B is AEC-Q101 qualified, as confirmed in Vishay document 88422 (Revision 09-Jan-2024). It undergoes stress testing including high-temperature operating life, temperature cycling, and ESD per AEC-Q101 requirements. The "HE3" suffix denotes AEC-Q101 qualification, but SMB10J40A-E3/5B uses the commercial "E3" suffix - however, the base SMB10J40A part number itself is explicitly listed as AEC-Q101 qualified in the "MECHANICAL DATA" section, and the E3/5B reel packaging does not affect qualification status.
What is the thermal resistance of SMB10J40A-E3/5B, and how does it affect PCB layout?
SMB10J40A-E3/5B 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 means a 1000 W surge applied for <1 ms will cause minimal steady-state heating, but repeated surges require adequate copper area and thermal vias to prevent junction temperature exceeding +150 °C. Layout must follow Vishay's recommended pad dimensions (0.086" min. width, 0.220" ref. length) to achieve this RθJA value.
Can SMB10J40A-E3/5B be used in bidirectional signal lines like RS-485?
No - SMB10J40A-E3/5B is strictly unidirectional, with cathode marked by a band and designed to conduct only in reverse breakdown. For bidirectional lines such as RS-485, a bidirectional variant like SMB8J40CA or paired unidirectional devices are required. Using SMB10J40A-E3/5B on a bidirectional line would forward-bias during half-cycles, causing failure. Always verify polarity marking and device type before placement.
What is the maximum reverse leakage current for SMB10J40A-E3/5B at its stand-off voltage?
At its 40 V stand-off voltage (VWM), SMB10J40A-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at TA = 25 °C. This ultra-low leakage ensures negligible power loss and avoids loading high-impedance circuits such as precision voltage references or sensor bias networks - a critical advantage over higher-leakage alternatives in battery-powered or low-power industrial nodes using SMB10J40A-E3/5B.
SMB10J40A-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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J40A-E3/5B FAQ
1.How can I place an order for SMB10J40A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J40A-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 SMB10J40A-E3/5B reliable?
The price and inventory of SMB10J40A-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 SMB10J40A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J40A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J40A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J40A-E3/5B?
SMB10J40A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J40A-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 SMB10J40A-E3/5B?
For technical support, including SMB10J40A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J40A-E3/5B requirements.
6.How does Aetrix verify that SMB10J40A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J40A-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 SMB10J40A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J40A-E3/5B?
All SMB10J40A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J40A-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 SMB10J40A-E3/5B part is unused and in its original packaging.
Return procedure for SMB10J40A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J40A-E3/5B Tags
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