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Vishay General Semiconductor - Diodes Division SMB10J40AHM3_B/H
- Part No.:
- SMB10J40AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J40AHM3_B/H.pdf
- Description:
- 1KW,40V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,013
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Product details
Overview
SMB10J40AHM3_B/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 maximum clamping voltage (VC) at 15.5 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines, power rails, and MOSFET gates against inductive switching transients.
For engineers reviewing the SMB10J40AHM3_B/H datasheet, SMB10J40AHM3_B/H pinout, SMB10J40AHM3_B/H application, or SMB10J40AHM3_B/H equivalent, this device is selected for robust overvoltage protection in automotive ECUs, industrial motor drives, and telecom interface circuits where low clamping voltage, fast response (<1 ns), and halogen-free RoHS compliance are required.
Technical Context
This TVS diode operates as a silicon avalanche clamp, triggering at breakdown voltage (VBR = 44.4–49.1 V) when reverse voltage exceeds VWM (40 V), diverting surge current away from sensitive downstream components. Its unidirectional polarity enables integration into DC-biased lines without forward conduction interference.
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, supporting operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and withstands 100 A non-repetitive forward surge (IFSM), making it suitable for high-stress automotive load-dump scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit DC bias. |
| VBR min/max | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold tolerance. |
| VC @ IPPM | 64.5 V at 15.5 A - Clamping voltage during 10/1000 µs surge; determines worst-case overvoltage seen by protected IC. |
| PPPM | 1000 W - Peak pulse power handling capability; enables protection against ISO 7637-2 Pulse 5a (load dump) surges. |
| ID @ VWM | 1.0 µA - Reverse leakage at rated stand-off voltage; ensures minimal quiescent power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive placement without derating at 125 °C ambient. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated SMT assembly and IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode (non-banded end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping current path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity, and mechanical shock per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets IEC 61249-2-21 and JEDEC J-STD-201 Class 2 whisker resistance; supports green manufacturing mandates. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio = ~1.45) versus standard TVS devices, reducing stress on downstream MOSFETs or transceivers. |
| MSL Level 1 rating | Allows unlimited floor life and reflow up to 260 °C peak, eliminating bake-out requirements prior to assembly. |
| Glass passivated junction | Improves long-term reliability and moisture resistance versus epoxy-passivated alternatives in humid environments. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Power Rails |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver input pins and Hall-effect sensor supply lines from load dump and inductive kickback in engine control modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VCC rail and ground, triggered within <1 ns of overvoltage event. Use Value: Limits transient voltage to ≤64.5 V, preventing latch-up or gate oxide damage in 40 V-rated automotive-grade ICs. |
Use Scenario: Safeguarding gate drivers and microcontroller I/Os in variable-frequency drives exposed to back-EMF from 3-phase induction motors. IC Role / Device Role / Timing Role: Standoff protection on 24 V auxiliary supply rail feeding isolated gate driver ICs. Use Value: Absorbs 1000 W surges without degradation, maintaining system uptime during frequent motor start-stop cycles. |
| Telecom Interface Surge Protection | Consumer Power Adapter Output Stage |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in outdoor base stations from lightning-induced surges on data lines. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair inputs, coordinated with secondary GDT or MOV stages. Use Value: Fast response and low clamping enable compliance with ITU-T K.21 basic protection level for telecom infrastructure. |
Use Scenario: Secondary-side overvoltage suppression on 5–20 V USB PD and QC adapter outputs to prevent damage during short-circuit recovery. IC Role / Device Role / Timing Role: Clamp placed after synchronous rectifier MOSFET, protecting output capacitor and load port. Use Value: Withstands repeated 10/1000 µs surges up to 15.5 A while maintaining <1 µA leakage at 40 V, minimizing no-load power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40AHE3_A/H | Same VWM (40 V), VBR (44.4–49.1 V), and PPPM (1000 W), but E3 suffix indicates standard RoHS (not halogen-free); RθJA = 72 °C/W identical. | Lacks halogen-free certification; acceptable for commercial/industrial use but not automotive AEC-Q101 programs requiring HM3 traceability. | Select SMBJ40AHE3_A/H only if halogen-free compliance is not mandated and cost sensitivity outweighs material specification requirements. |
| 1.5SMC40A | Same electrical specs (VWM = 40 V, VC = 64.5 V, PPPM = 1000 W), but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm); higher RθJA = 85 °C/W. | Requires larger PCB area and exhibits higher thermal resistance; less suitable for dense automotive modules with strict thermal budgets. | Choose 1.5SMC40A only when existing SMC footprint is fixed and board space allows; otherwise SMB10J40AHM3_B/H offers superior power density. |
Compared with SMBJ40AHE3_A/H and 1.5SMC40A, SMB10J40AHM3_B/H delivers identical surge protection performance in a smaller, halogen-free, AEC-Q101-qualified package-enabling higher component density and compliance with Tier-1 automotive material declarations without sacrificing clamping accuracy or thermal margin.
Availability
SMB10J40AHM3_B/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drive power supplies, and telecom infrastructure equipment requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB10J40AHM3_B/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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMB10JxxA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh-environment automotive and industrial applications.
FAQ
What is the maximum clamping voltage of SMB10J40AHM3_B/H at its rated peak pulse current?
The SMB10J40AHM3_B/H has a maximum clamping voltage (VC) of 64.5 V at its specified peak pulse current (IPPM) of 15.5 A under the 10/1000 µs waveform condition. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMB10J40AHM3_B/H maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMB10J40AHM3_B/H suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMB10J40AHM3_B/H is explicitly AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number: 88422, Revision: 09-Jan-2024). The HM3 suffix denotes halogen-free, RoHS-compliant construction with full automotive stress testing including temperature cycling, mechanical shock, and humidity exposure. SMB10J40AHM3_B/H is approved for use in engine control units, body control modules, and ADAS sensor interfaces.
How does the SMB10J40AHM3_B/H package differ from the SMC package used in similar 1000 W TVS diodes?
The SMB10J40AHM3_B/H uses the SMB (DO-214AA) package measuring 4.06 mm × 5.59 mm, whereas SMC (DO-214AB) devices like 1.5SMC40A measure 6.22 mm × 7.11 mm - a 45 % larger footprint. This smaller size enables higher board density in space-constrained automotive modules. Additionally, SMB10J40AHM3_B/H achieves identical thermal resistance (RθJL = 20 °C/W) despite its reduced size due to optimized leadframe design and glass passivation.
What is the reverse leakage current of SMB10J40AHM3_B/H at its maximum working voltage?
At its maximum stand-off voltage (VWM) of 40 V and TA = 25 °C, the SMB10J40AHM3_B/H exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage ensures minimal power drain in always-on automotive subsystems such as telematics or alarm controllers. Leakage remains below 5.0 µA up to +85 °C ambient, verified per Vishay's thermal derating curves in Figure 2 of Document 88422.
Can SMB10J40AHM3_B/H be used in bidirectional configurations?
No, SMB10J40AHM3_B/H is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional variants (e.g., SMB8J40CA) exist in the same family but feature symmetric breakdown and different marking codes. Using SMB10J40AHM3_B/H in AC or floating-bias applications would result in forward conduction during negative half-cycles, potentially damaging the device or circuit. Always verify polarity alignment during layout.
SMB10J40AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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:
- 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_B/H FAQ
1.How can I place an order for SMB10J40AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J40AHM3_B/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_B/H reliable?
The price and inventory of SMB10J40AHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SMB10J40AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J40AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J40AHM3_B/H?
SMB10J40AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J40AHM3_B/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_B/H?
For technical support, including SMB10J40AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J40AHM3_B/H requirements.
6.How does Aetrix verify that SMB10J40AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB10J40AHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SMB10J40AHM3_B/H?
All SMB10J40AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J40AHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for SMB10J40AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J40AHM3_B/H Tags
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