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Vishay General Semiconductor - Diodes Division SMBJ40CAHE3_A/H
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- Part No.:
- SMBJ40CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ40CAHE3_A/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,943
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Product details
Overview
SMBJ40CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features 40 V standoff voltage (VWM), 64.5 V maximum clamping voltage (VC) at 9.3 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), protecting sensitive ICs and MOSFETs in industrial and telecom interfaces.
For engineers reviewing the SMBJ40CAHE3_A/H datasheet, SMBJ40CAHE3_A/H pinout, SMBJ40CAHE3_A/H application, or SMBJ40CAHE3_A/H equivalent, key selection criteria include bidirectional surge suppression capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protection element across bidirectional signal or DC bus lines, responding to fast-rising transients (sub-nanosecond response time) by transitioning from high-impedance to low-impedance state. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the SMB package supports automated placement and meets MSL level 1 reflow requirements (260 °C peak).
The SMBJ40CAHE3_A/H is rated for repetitive surge duty cycle of 0.01 %, with derating above 25 °C ambient per Fig. 2, and is qualified to AEC-Q101 for automotive-grade reliability. Its unmarked bidirectional polarity eliminates orientation concerns during placement, distinguishing it from unidirectional variants that use cathode band marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 36–40 V nominal systems. |
| VBR min/max | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on under ESD or lightning-induced surges. |
| VC @ IPPM | 64.5 V - Clamped voltage seen by protected circuit at 9.3 A peak pulse (10/1000 µs); limits stress on downstream 60 V-rated components. |
| PPPM | 600 W - Peak transient power dissipation capability; supports IEC 61000-4-5 Level 4 (4 kV) surge testing when properly laid out. |
| IPPM | 9.3 A - Maximum non-repetitive surge current the device can safely divert without degradation; derived from 10/1000 µs waveform. |
| TJ max | +150 °C - Maximum junction temperature rating; enables operation in under-hood automotive or high-ambient industrial environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs board-level thermal design for sustained surge duty. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Acts as current sink during positive transients and source during negative transients; symmetric conduction path. |
| Cathode | Transient current exit (bidirectional) | Paired terminal completing bidirectional clamping loop; no physical marking distinguishes polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 surge events up to 4 kV in industrial control and telecom line cards. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including body electronics and infotainment power rails where reliability under thermal cycling is critical. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, reducing voltage stress on protected MOSFET gates and microcontroller I/O pins. |
| MSL level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without popcorn cracking or delamination, compatible with standard SMT production lines. |
| Glass passivated junction | Ensures stable VBR over lifetime and temperature, with <1.0 µA leakage at 40 V, critical for low-power sensor interface protection. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from 24 V solenoid switching. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across MOSFET source-drain or op-amp inputs to limit transient excursions. Use Value: Limits voltage spikes to ≤64.5 V during 9.3 A surges, preventing latch-up or oxide breakdown in 60 V-rated silicon. | Use Scenario: Surge suppression on LIN bus lines and power supply inputs in door module ECUs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff clamp on 12 V rail and data lines, activated only during transients >44.4 V to avoid interference with normal signaling. Use Value: AEC-Q101 qualification ensures survival through 1000+ thermal cycles and 1000 h HTOL, meeting automotive longevity requirements. |
| Telecom Power Feeds | Consumer Sensor Interfaces |
Use Scenario: Protection of PoE-powered Ethernet PHYs and DC-DC controllers against lightning-induced surges on 48 V input rails. IC Role / Device Role / Timing Role: Primary TVS on secondary-side DC bus, coordinated with upstream MOVs and common-mode chokes. Use Value: 600 W rating allows absorption of 10/1000 µs surges up to 4 kV without derating, maintaining system uptime in outdoor deployments. | Use Scenario: ESD protection for I²C/SPI lines connecting MEMS accelerometers and microcontrollers in portable devices. IC Role / Device Role / Timing Role: Low-capacitance (typ. 100 pF at 0 V) bidirectional clamp placed directly at connector or IC pad. Use Value: Sub-100 ns response time prevents ESD pulses from propagating into digital logic, reducing firmware lockup incidents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, identical SMB package and pinout. | Lacks automotive qualification; suitable for industrial/commercial designs not requiring AEC-Q101 traceability. | Select when cost sensitivity outweighs automotive reliability requirements and full lifecycle documentation is not mandated. |
| SMCJ40CAHE3_A/H | Same electrical specs but in larger SMC (DO-214AB) package; higher IPPM (15.4 A) and lower RθJA (50 °C/W). | Better thermal performance for high-duty-cycle surges; requires larger PCB footprint and different pad layout. | Choose when surge repetition rate exceeds 0.01 % or board space permits larger package for improved thermal margin. |
Compared with SMBJ40CA-E3/52, the SMBJ40CAHE3_A/H adds AEC-Q101 qualification and halogen-free compliance without changing clamping behavior; versus SMCJ40CAHE3_A/H, it trades thermal headroom and surge current capacity for compact SMB footprint and lower assembly cost.
Availability
SMBJ40CAHE3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer sensor interfaces requiring stable component supply and AEC-Q101 traceability.
Supply support for SMBJ40CAHE3_A/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 reliability, efficiency, and manufacturability.
The SMBJ series is engineered for high-energy transient suppression in space-constrained applications, targeting automotive, industrial, and telecom systems where robustness and AEC-Q101 compliance are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ40CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ40CAHE3_A/H provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ40A), it has no cathode marking and functions identically in either polarity-critical for AC-coupled signal lines or differential buses where polarity reversal may occur during fault conditions.
Is SMBJ40CAHE3_A/H suitable for automotive applications?
Yes, SMBJ40CAHE3_A/H is AEC-Q101 qualified, as confirmed by its HE3 suffix and Vishay's ordering information table. This qualification covers stress tests including temperature cycling, high-temperature operating life, and electrostatic discharge, making SMBJ40CAHE3_A/H appropriate for under-hood and cabin electronics such as body control modules and lighting drivers where reliability under harsh conditions is essential.
What is the maximum clamping voltage of SMBJ40CAHE3_A/H and at what current is it specified?
The maximum clamping voltage (VC) of SMBJ40CAHE3_A/H is 64.5 V, measured at a peak pulse current (IPPM) of 9.3 A using the standardized 10/1000 µs double-exponential waveform. This value represents the worst-case voltage imposed on the protected circuit during a surge event and must be compared against the absolute maximum ratings of downstream components to ensure safe operation.
How does the SMB (DO-214AA) package of SMBJ40CAHE3_A/H compare to SMC (DO-214AB) in thermal performance?
SMBJ40CAHE3_A/H in SMB package has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads, whereas the SMC-packaged equivalent (e.g., SMCJ40CAHE3_A/H) achieves ~50 °C/W. This means SMBJ40CAHE3_A/H reaches higher junction temperatures under identical power dissipation, limiting its use in high-duty-cycle or high-ambient applications unless board-level copper area is increased.
Does SMBJ40CAHE3_A/H require orientation during PCB placement?
No, SMBJ40CAHE3_A/H does not require specific orientation because it is a bidirectional TVS diode with no polarity marking. The device functions identically regardless of anode/cathode placement on the board-unlike unidirectional variants (e.g., SMBJ40A) which feature a cathode band and must be oriented correctly to protect against forward-biased surges.
SMBJ40CAHE3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ40CAHE3_A/H FAQ
1.How can I place an order for SMBJ40CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ40CAHE3_A/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 SMBJ40CAHE3_A/H reliable?
The price and inventory of SMBJ40CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ40CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ40CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ40CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ40CAHE3_A/H?
SMBJ40CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ40CAHE3_A/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 SMBJ40CAHE3_A/H?
For technical support, including SMBJ40CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ40CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ40CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ40CAHE3_A/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 SMBJ40CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ40CAHE3_A/H?
All SMBJ40CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ40CAHE3_A/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 SMBJ40CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ40CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ40CAHE3_A/H Tags
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