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Vishay General Semiconductor - Diodes Division SMB10J40AHM3/H
- Part No.:
- SMB10J40AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J40AHM3/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,827
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Product details
Overview
SMB10J40AHM3/H 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 clamping voltage (VC) at 15.5 A peak surge current. It protects MOSFETs, ICs, and sensor signal lines in automotive powertrain control units against inductive switching transients.
For engineers reviewing the SMB10J40AHM3/H datasheet, SMB10J40AHM3/H pinout, SMB10J40AHM3/H application, or SMB10J40AHM3/H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 72 °C/W), clamping performance under 10/1000 μs surges, and halogen-free RoHS-compliant sourcing details.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns), low incremental surge resistance, and stable breakdown behavior across -55 °C to +150 °C operating junction temperature. Its unidirectional polarity enables DC-biased line protection without reverse conduction during normal operation.
The device meets J-STD-020 MSL Level 1 (260 °C peak reflow), supports automated SMT placement, and is qualified to AEC-Q101 for automotive under-hood applications. Its 72 °C/W junction-to-ambient thermal resistance requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 36 V nominal automotive systems. |
| VBR (min/max) | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current; ensures reliable turn-on above system overvoltage thresholds. |
| VC @ IPPM | 64.5 V - Clamped voltage at 15.5 A peak pulse current (10/1000 μs); limits downstream component stress during ISO 7637-2 Pulse 1/2a/5a events. |
| PPPM | 1000 W - Peak pulse power handling capability; sustains 1000 W for 1 ms under standard waveform, enabling robust protection against load dump surges. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports temporary fault currents in 12 V/24 V power rails. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; determines required board copper area for thermal management. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TC, UHAST, and ESD; suitable for engine control modules and ADAS power supplies. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads. Cathode indicated by color band on case end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connects to protected line; conducts transient energy to ground when VLINE exceeds VBR. |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes surge current path during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| 1000 W peak pulse power (10/1000 μs) | Enables protection against severe ISO 7637-2 Pulse 5a (load dump) transients in 24 V commercial vehicle systems. |
| AEC-Q101 qualified | Validated for automotive under-hood environments including 1000+ thermal cycles and 1000 h HTOL at 150 °C junction temperature. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets automotive OEM material compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) without compromising surge robustness. |
| Low RθJA = 72 °C/W | Allows full 1000 W pulse power dissipation with only 0.2" × 0.2" copper pads per terminal-no heatsink needed in most PCB layouts. |
| Glass-passivated junction | Ensures stable VBR and leakage performance over lifetime, even under humidity bias stress (UHAST) conditions. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Inputs |
|---|---|
|
Use Scenario: Protecting microcontroller I/O and gate driver inputs in engine control units exposed to alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transients on 12 V supply rail and sensor analog inputs before they reach sensitive CMOS inputs. Use Value: Limits VC to 64.5 V during 1000 W surges, preventing latch-up or oxide breakdown in 3.3 V/5 V logic interfaces. |
Use Scenario: Safeguarding PLC digital input modules connected to 24 V industrial solenoids and contactors. IC Role / Device Role / Timing Role: Absorbs inductive kickback energy from 24 V DC coils during de-energization, suppressing >100 V spikes. Use Value: Withstands 100 A non-repetitive forward surge (IFSM), ensuring survival during repeated actuator switching cycles. |
| Automotive ADAS Camera Power Supply | Telecom Base Station DC Feeds |
|
Use Scenario: Shielding 5 V camera module power rails in rear-view and surround-view systems from battery transients. IC Role / Device Role / Timing Role: Fast-response clamping (<1 ns) prevents pixel corruption or reset events caused by sub-microsecond EFT bursts. Use Value: Maintains <1 μA leakage at 40 V VWM, avoiding quiescent current penalty in always-on vision systems. |
Use Scenario: Protecting 48 V DC power inputs of remote radio heads from lightning-induced surges on outdoor feeder lines. IC Role / Device Role / Timing Role: Acts as primary front-end clamp ahead of DC-DC converters, diverting >1 kA surge currents via low-inductance layout. Use Value: Delivers 64.5 V clamping at 15.5 A, keeping downstream converter input below absolute maximum ratings during telecom-grade surge tests. |
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 VWM/VC/PPPM, but RoHS-compliant commercial grade (not AEC-Q101 qualified); RθJA = 72 °C/W identical. | Lacks automotive qualification; unsuitable for production ECUs but acceptable for industrial prototypes or non-safety-critical designs. | Select SMBJ40A-E3/52 only for cost-sensitive commercial applications where AEC-Q101 is not mandated. |
| SMCJ40A-HM3 | Higher PPPM = 1500 W, larger SMC (DO-214AB) package, same VWM/VC; RθJA = 35 °C/W due to larger thermal mass. | Requires larger PCB footprint and higher assembly cost; used where >1000 W surge immunity is specified (e.g., heavy-duty truck load dump). | Choose SMCJ40A-HM3 only when system-level testing demands >1000 W pulse handling or lower thermal resistance is critical. |
Compared with SMBJ40A-E3/52, SMB10J40AHM3/H adds AEC-Q101 qualification and halogen-free compliance without sacrificing clamping performance; versus SMCJ40A-HM3, it trades 500 W pulse headroom for 30% smaller PCB area and identical thermal design rules on standard pads.
Availability
SMB10J40AHM3/H is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive inputs, ADAS camera power supplies, and telecom base station DC feeds requiring stable component supply with AEC-Q101 validation and halogen-free compliance.
Supply support for SMB10J40AHM3/H 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 automotive, industrial, and computing applications.
The SMB10J series targets high-power-density transient suppression in space-constrained automotive and industrial systems, balancing 1000 W surge capability with SMB package manufacturability and AEC-Q101 reliability.
FAQ
What is the clamping voltage of SMB10J40AHM3/H at its rated peak pulse current?
The SMB10J40AHM3/H 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. The SMB10J40AHM3/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB10J40AHM3/H qualified for automotive applications?
Yes, SMB10J40AHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It has passed stress tests including high-temperature operating life (HTOL), temperature cycling, unbiased highly accelerated stress test (UHAST), and ESD per AEC-Q101 Rev H. The SMB10J40AHM3/H is approved for use in engine control units, transmission control modules, and ADAS power supplies.
What is the thermal resistance of SMB10J40AHM3/H, and how does it affect PCB layout?
The SMB10J40AHM3/H 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 each watt of surge power raises the junction temperature by 72 °C above ambient. To sustain full 1000 W pulse power, the PCB must provide adequate copper area and thermal vias-no additional heatsink is required if the SMB10J40AHM3/H layout follows Vishay's recommended pad dimensions.
How does SMB10J40AHM3/H differ from SMBJ40A-E3/52?
The SMB10J40AHM3/H shares identical electrical specs (VWM = 40 V, VC = 64.5 V, PPPM = 1000 W) with SMBJ40A-E3/52 but adds AEC-Q101 qualification and halogen-free construction (HM3). The SMB10J40AHM3/H is intended for production automotive systems, while SMBJ40A-E3/52 is commercial-grade. Both use the same SMB package and thermal characteristics, but only SMB10J40AHM3/H meets OEM automotive material and reliability requirements.
What is the maximum reverse leakage current of SMB10J40AHM3/H at its stand-off voltage?
At its 40 V stand-off voltage (VWM), the SMB10J40AHM3/H exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C. This ultra-low leakage preserves system quiescent current in always-on automotive modules such as body controllers and camera systems. Leakage remains below 5.0 μA up to +85 °C, ensuring stable performance across the full industrial temperature range.
SMB10J40AHM3/H 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:
- 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)
SMB10J40AHM3/H FAQ
1.How can I place an order for SMB10J40AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J40AHM3/H 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 SMB10J40AHM3/H reliable?
The price and inventory of SMB10J40AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J40AHM3/H is usually 5 days.
3.What payment methods are accepted for SMB10J40AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J40AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J40AHM3/H?
SMB10J40AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J40AHM3/H 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 SMB10J40AHM3/H?
For technical support, including SMB10J40AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J40AHM3/H requirements.
6.How does Aetrix verify that SMB10J40AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB10J40AHM3/H 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 SMB10J40AHM3/H meets industry standards.
7.What is the process for return or replacement of SMB10J40AHM3/H?
All SMB10J40AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J40AHM3/H, 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 SMB10J40AHM3/H part is unused and in its original packaging.
Return procedure for SMB10J40AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J40AHM3/H Tags
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