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Vishay General Semiconductor - Diodes Division SMBG75CAHE3/5B
- Part No.:
- SMBG75CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG75CAHE3/5B.pdf
- Description:
- TVS DIODE 75VWM 121VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,179
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Product details
Overview
SMBG75CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 75 V stand-off voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 121 V at 5.0 A peak pulse current, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMBG75CAHE3/5B datasheet, SMBG75CAHE3/5B pinout, SMBG75CAHE3/5B application, or SMBG75CAHE3/5B equivalent, this device is selected for high-reliability ESD and surge protection on signal lines, power rails, and sensor interfaces where bidirectional clamping, low leakage (<1.0 µA at VWM), and stable junction temperature operation up to +150 °C are required.
Technical Context
The SMBG75CAHE3/5B operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable VBR tolerance (±5 % typical) and low incremental surge resistance, enabling precise voltage limiting during fast-rising ESD or lightning-induced surges.
Thermally, it exhibits RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W, supporting sustained operation under repetitive 0.01 % duty cycle pulses. It meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive underhood and infotainment applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V/24 V automotive and industrial power rails. |
| VBR (min/max) | 83.3 V / 92.1 V at IT = 1 mA - Tight breakdown window ensures predictable turn-on and compatibility with downstream IC overvoltage thresholds. |
| VC @ IPPM | 121 V at 5.0 A - Clamping voltage limits transient energy delivered to protected circuitry; critical for safeguarding 100 V-rated MOSFETs or CAN transceivers. |
| PPPM | 600 W (10/1000 µs) - Sustains high-energy surges common in load-dump or inductive switching events without degradation. |
| ID @ VWM | <1.0 µA - Ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes and low-power microcontrollers. |
| TJ max | +150 °C - Enables deployment in engine control units, motor drives, and under-hood modules without thermal derating penalties. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.10 mm (L × W × H); matte tin-plated leads, RoHS-compliant, AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; accepts reverse surge current during negative transients. |
| Cathode | Transient current entry (positive polarity) | Second terminal of symmetrical junction; accepts forward surge current during positive transients; functionally identical to Anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, USB D+/D−) without external polarity management. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock-required for Tier-1 ECU designs. |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 4 surges when mounted per recommended 5.0 mm × 5.0 mm copper pad layout. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; compatible with high-throughput SMT assembly at 260 °C peak. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply inputs in body control modules against load-dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and LDOs to limit input voltage excursion to ≤121 V. Use Value: Prevents catastrophic failure of voltage regulators and microcontrollers by absorbing up to 600 W surge energy without parameter shift. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLCs from ESD and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional TVS shunting transients on ratiometric 0–5 V or 4–20 mA outputs before signal conditioning amplifiers. Use Value: Maintains sub-µA leakage to avoid gain error in precision instrumentation while responding in <1 ns to 8 kV contact ESD (IEC 61000-4-2). |
| Automotive CAN Bus Protection | Consumer Appliance Motor Control |
Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TJA1044) in ADAS domain controllers from coupled surges on vehicle harnesses. IC Role / Device Role / Timing Role: Low-capacitance (typ. 100 pF at 0 V) bidirectional clamp on CAN_H/CAN_L differential pair, placed adjacent to connector. Use Value: Limits clamping voltage to 121 V without distorting 5 Mbps CAN FD waveforms due to minimal parasitic capacitance and symmetric VBR. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Snubber-connected across motor terminals or flyback diode replacement for faster transient suppression than standard rectifiers. Use Value: Reduces electromagnetic interference (EMI) radiated from motor cables and prevents reset events in MCU-based motor drivers during stall conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA | Same VWM/VBR/PPPM, but SMB (DO-214AA) package; 10 % larger footprint; RθJA = 110 °C/W. | Limited to non-AEC-Q101 industrial use; not qualified for automotive underhood environments. | Select SMBJ75CA only if board space allows larger package and AEC-Q101 compliance is unnecessary. |
| SMCJ75CA | Same electrical specs, but SMC (DO-214AB) package; 1500 W PPPM; RθJA = 15 °C/W; higher cost and larger footprint. | Used where higher surge endurance (e.g., outdoor telecom power supplies) justifies added size and cost. | Choose SMCJ75CA when system-level surge testing exceeds IEC 61000-4-5 Level 4 or requires >600 W margin. |
Compared with SMBJ75CA and SMCJ75CA, the SMBG75CAHE3/5B uniquely delivers AEC-Q101 qualification in the smallest footprint (SMBG) among 75 V bidirectional TVS diodes, making it optimal for space-constrained automotive ECUs where thermal performance and reliability are co-prioritized.
Availability
SMBG75CAHE3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and consumer appliance motor drives requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG75CAHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series was engineered for high-density surface-mount surge protection in automotive and industrial systems, prioritizing AEC-Q101 compliance, low-profile packaging, and repeatable clamping performance under thermal stress.
FAQ
What is the maximum clamping voltage of SMBG75CAHE3/5B at its rated peak pulse current?
The SMBG75CAHE3/5B has a maximum clamping voltage (VC) of 121 V at 5.0 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream circuitry sees no more than 121 V during worst-case surge events, directly supporting design margining for 100 V-rated components. The SMBG75CAHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBG75CAHE3/5B suitable for automotive applications?
Yes, SMBG75CAHE3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and infotainment systems. Its construction includes glass-passivated junctions, matte tin-plated leads compliant with J-STD-002, and MSL Level 1 handling-enabling direct placement into automotive production lines. The SMBG75CAHE3/5B datasheet confirms qualification per AEC-Q101 test conditions, and its 150 °C maximum junction temperature supports engine bay deployments.
What does the "HE3/5B" suffix indicate in SMBG75CAHE3/5B?
The "HE3" suffix denotes RoHS-compliant, AEC-Q101-qualified construction, while "5B" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3200 units. This format enables high-volume automated pick-and-place assembly. The SMBG75CAHE3/5B ordering code aligns with Vishay's standardized nomenclature for automotive-grade TVS diodes in tape-and-reel delivery, ensuring consistent traceability and process compatibility.
How does SMBG75CAHE3/5B differ from unidirectional variants like SMBG75AHE3/5B?
The SMBG75CAHE3/5B is bidirectional, meaning it clamps voltage transients equally in both polarities with no cathode band marking, whereas SMBG75AHE3/5B is unidirectional and features a cathode band for polarity orientation. Electrically, SMBG75CAHE3/5B has symmetric VBR and VC characteristics, making it ideal for AC or floating lines; SMBG75AHE3/5B offers lower forward voltage (VF = 3.5 V at 50 A) but cannot protect against negative surges without additional components.
What is the thermal resistance of SMBG75CAHE3/5B, and how does it affect PCB layout?
The SMBG75CAHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To achieve this rating, the PCB must implement minimum recommended pad layout per Vishay's outline drawing-underscoring the need for adequate copper area to dissipate surge energy thermally. Using smaller pads increases RθJA, risking junction overheating during repetitive surges and degrading long-term reliability of the SMBG75CAHE3/5B.
SMBG75CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 5A
- 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 (SMBG)
SMBG75CAHE3/5B FAQ
1.How can I place an order for SMBG75CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG75CAHE3/5B 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 SMBG75CAHE3/5B reliable?
The price and inventory of SMBG75CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG75CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG75CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG75CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG75CAHE3/5B?
SMBG75CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG75CAHE3/5B 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 SMBG75CAHE3/5B?
For technical support, including SMBG75CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG75CAHE3/5B requirements.
6.How does Aetrix verify that SMBG75CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG75CAHE3/5B 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 SMBG75CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG75CAHE3/5B?
All SMBG75CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG75CAHE3/5B, 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 SMBG75CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBG75CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG75CAHE3/5B Tags
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