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Vishay General Semiconductor - Diodes Division SMB10J40A-M3/5B
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- Part No.:
- SMB10J40A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J40A-M3/5B.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,397
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Product details
Overview
SMB10J40A-M3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on DC power rails and signal lines. It features 40 V stand-off voltage (VWM), 64.5 V maximum clamping voltage (VC) at 15.5 A peak pulse current (IPPM), and 1000 W peak pulse power (10/1000 µs waveform), qualified to AEC-Q101 for automotive electronics.
For engineers reviewing the SMB10J40A-M3/5B datasheet, SMB10J40A-M3/5B pinout, SMB10J40A-M3/5B application, or SMB10J40A-M3/5B equivalent, this device is selected for robust overvoltage protection in automotive ECUs, industrial sensor interfaces, and 24 V/48 V power supply inputs where fast response (<1 ns), low clamping ratio (1.61), and halogen-free RoHS compliance are required.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 40 V), then avalanches sharply at its 44.4–49.1 V breakdown range (VBR at 1 mA) to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable parametric performance across temperature (–55 °C to +150 °C) and lifetime.
The SMB10J40A-M3/5B uses a single PN junction with cathode-band polarity marking, optimized for 10/1000 µs surge waveforms per ANSI/IEEE C62.35. Its thermal resistance (RθJA = 72 °C/W) and RθJL = 20 °C/W support reliable power dissipation when mounted on 5.0 mm × 5.0 mm copper pads per recommended layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe DC rail margin for 48 V systems. |
| VBR (min/max) | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on during transients. |
| VC @ IPPM | 64.5 V - Clamps 10/1000 µs surges up to 15.5 A to ≤64.5 V, limiting stress on protected 40 V-rated components. |
| PPPM | 1000 W - Peak pulse power handling capacity; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity. |
| IFSM | 100 A - Withstands 8.3 ms half-sine surge without failure; critical for load-dump protection in automotive 12 V/24 V networks. |
| TJ max | +150 °C - Junction temperature limit enabling operation in engine bay or industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile (max height 2.20 mm), matte tin-plated leads, UL 94 V-0 molding compound. Cathode indicated by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side return path | Provides low-impedance discharge path to ground during positive transients on cathode-connected line. |
| Cathode | Current exit point in forward bias; marked with color band; connected to protected line (e.g., 48 V rail) | Defines polarity-sensitive placement: must be tied to the node requiring clamping; reverse connection disables protection. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant (M3 suffix) | Meets JESD201 Class 2 whisker resistance and global environmental regulations without compromising surge robustness. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR = 1.61) versus competing TVS diodes, reducing voltage overshoot on sensitive loads. |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Fast response time (<1 ns) | Clamps transients before they propagate through PCB traces or damage gate oxides of MOSFETs and microcontrollers. |
| Glass passivated junction | Ensures stable VBR tolerance and leakage performance over 10+ years in harsh environments (humidity, thermal cycling). |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery management system (BMS) input against load dump and jump-start surges. IC Role / Device Role / Timing Role: Shunt TVS placed between 48 V rail and chassis ground to clamp transients exceeding 64.5 V. Use Value: Prevents destruction of upstream DC-DC converters and MCU power supplies during ISO 16750-2 pulse 5a events. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Unidirectional clamping element on 24 V sensor excitation line to absorb inductive kickback from solenoid drivers. Use Value: Maintains signal integrity and extends sensor lifetime by limiting reverse voltage to <64.5 V during field-wiring faults. |
| Telecom DC Power Input | Motor Drive Control Signal Line |
Use Scenario: Surge protection on –48 V telecom rectifier output feeding base station backplane. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode to –48 V, anode to ground) clamping negative surges. Use Value: Complies with GR-1089-CORE Level 4 immunity while occupying minimal board area in dense telecom modules. | Use Scenario: Shielding PWM enable/disable signals routed near high-current motor phases in BLDC inverters. IC Role / Device Role / Timing Role: Low-capacitance (typ. 100 pF at 0 V) TVS on gate driver control lines to suppress coupled EMI. Use Value: Prevents false triggering of half-bridge MOSFETs without adding signal delay or distortion to 20 kHz PWM edges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A-M3/5B | Same VWM (40 V), identical SMB package, but lower PPPM = 600 W and higher VC = 64.5 V at 9.3 A. | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy transients in consumer-grade equipment. | Select SMB10J40A-M3/5B when 1000 W surge rating and AEC-Q101 qualification are mandatory. |
| SMCJ40A-M3/5B | Same electrical specs but in larger SMC (DO-214AB) package; 30% higher thermal mass and RθJA = 35 °C/W. | Requires larger PCB footprint and may not fit space-constrained automotive modules. | Choose SMB10J40A-M3/5B for compact layouts where 72 °C/W RθJA is acceptable with proper pad design. |
Compared with SMBJ40A-M3/5B and SMCJ40A-M3/5B, the SMB10J40A-M3/5B delivers full 1000 W surge capability in the smallest standardized SMB outline, with AEC-Q101 validation and halogen-free construction-making it optimal for next-generation automotive and industrial edge nodes where size, reliability, and regulatory compliance are jointly constrained.
Availability
SMB10J40A-M3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply, long-term lifecycle assurance, and traceable halogen-free sourcing.
Supply support for SMB10J40A-M3/5B 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 high-reliability, high-power-density solutions.
The SMB10JxxA series was engineered specifically for automotive and industrial transient suppression, balancing ultra-low clamping voltage, AEC-Q101 qualification, and surface-mount manufacturability in the SMB footprint.
FAQ
What is the maximum clamping voltage of SMB10J40A-M3/5B at its rated peak pulse current?
The SMB10J40A-M3/5B has a maximum clamping voltage (VC) of 64.5 V at its specified peak pulse current (IPPM) of 15.5 A under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures downstream components rated for ≤60 V can survive surge events without overstress. The SMB10J40A-M3/5B achieves this with low incremental resistance, resulting in a clamping ratio (VC/VBR) of 1.61.
Is SMB10J40A-M3/5B suitable for automotive applications?
Yes, SMB10J40A-M3/5B is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, body electronics, and ADAS power domains. Its M3 suffix denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, and its thermal rating (TJ max = +150 °C) supports under-hood deployment. The SMB10J40A-M3/5B also meets MSL Level 1 for lead-free reflow compatibility.
How does the SMB10J40A-M3/5B differ from the SMBJ40A-M3/5B?
The SMB10J40A-M3/5B offers 1000 W peak pulse power (versus 600 W for SMBJ40A-M3/5B) and identical clamping voltage (64.5 V), enabling higher-energy surge handling in the same SMB package. Both share VWM = 40 V and VBR = 44.4–49.1 V, but the SMB10J40A-M3/5B sustains 15.5 A IPPM vs. 9.3 A for SMBJ40A-M3/5B. The SMB10J40A-M3/5B is AEC-Q101 qualified; SMBJ40A-M3/5B is commercial grade only.
What is the polarity configuration of SMB10J40A-M3/5B?
The SMB10J40A-M3/5B is a unidirectional TVS diode, with cathode identified by a black band on the SMB (DO-214AA) package body. In circuit, the cathode connects to the line requiring protection (e.g., 48 V rail), and the anode connects to ground. This configuration provides low-leakage reverse blocking up to 40 V and rapid avalanche conduction during positive transients. Bidirectional variants (e.g., SMB10J40CA) exist but are distinct part numbers.
What PCB layout guidance applies to SMB10J40A-M3/5B for optimal thermal and surge performance?
For optimal performance, mount SMB10J40A-M3/5B on minimum 5.0 mm × 5.0 mm copper pads per terminal, per Vishay's recommended layout. Use internal ground planes and thermal vias beneath pads to reduce RθJA from 72 °C/W toward 40–50 °C/W. Keep traces short and wide between the SMB10J40A-M3/5B and protected node to minimize inductance, preserving sub-nanosecond response. Avoid routing high-speed signals adjacent to its terminals to prevent coupling.
SMB10J40A-M3/5B 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 (SMBJ)
SMB10J40A-M3/5B FAQ
1.How can I place an order for SMB10J40A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J40A-M3/5B 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-M3/5B reliable?
The price and inventory of SMB10J40A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J40A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J40A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J40A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J40A-M3/5B?
SMB10J40A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J40A-M3/5B 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-M3/5B?
For technical support, including SMB10J40A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J40A-M3/5B requirements.
6.How does Aetrix verify that SMB10J40A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J40A-M3/5B 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-M3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J40A-M3/5B?
All SMB10J40A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J40A-M3/5B, 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-M3/5B part is unused and in its original packaging.
Return procedure for SMB10J40A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J40A-M3/5B Tags
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