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Vishay General Semiconductor - Diodes Division SMBJ7.5HE3/52
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- Part No.:
- SMBJ7.5HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5HE3/52.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,472
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Product details
Overview
SMBJ7.5HE3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on DC power rails and signal lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ7.5HE3/52 datasheet, SMBJ7.5HE3/52 pinout, SMBJ7.5HE3/52 application, or SMBJ7.5HE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), clamping performance under 46.5 A surge, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device in series with DC power inputs or parallel to sensitive nodes. Its glass-passivated junction enables fast response (<1 ns), low incremental surge resistance, and stable clamping over temperature (VBR tempco = 0.067 %/°C).
Designed for single-polarity transient suppression, SMBJ7.5HE3/52 conducts only when reverse voltage exceeds VBR, limiting downstream voltage to ≤12.9 V during 10/1000 µs surges. It meets MSL Level 1 per J-STD-020 and supports peak forward surge current of 100 A (8.3 ms half-sine), making it suitable for automotive-grade 12 V system rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.5 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 8.33–9.21 V at 1.0 mA - Confirmed minimum/maximum conduction onset; ensures reliable triggering above normal rail noise. |
| VC (Clamping Voltage) | 12.9 V at IPPM = 46.5 A - Peak voltage seen by protected circuit during worst-case transient; defines safe operating ceiling. |
| PPPM (Peak Pulse Power) | 600 W with 10/1000 µs waveform - Sustains high-energy transients without failure; validated at 0.01 % duty cycle. |
| ID (Reverse Leakage) | 100 µA max at VWM - Low standby current preserves efficiency in always-on systems like automotive ECUs. |
| TJ max. | 150 °C - Enables operation in under-hood environments and enclosed industrial enclosures without derating. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs heatsinking needs. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line (e.g., +12 V rail); conducts surge current to ground when V > VBR. |
| Anode (unbanded end) | Reference / return path | Typically tied to system ground; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS power rails. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 surge test levels (e.g., 1 kV/2 Ω coupling) without degradation. |
| Glass passivated junction | Ensures long-term reliability and stable VBR across humidity, temperature, and life-cycle stress. |
| MSL Level 1 rating | Compatible with standard reflow profiles up to 260 °C peak; no floor-life management required. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to downstream ICs while maintaining margin above VWM. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 12 V battery-supplied ECU modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground to clamp transients before DC-DC converter input. Use Value: Limits voltage to ≤12.9 V during 46.5 A surges, preventing damage to 16 V-rated input capacitors and LDO regulators. |
Use Scenario: Analog output lines (e.g., 4–20 mA current loop) connected to PLC analog input cards. IC Role / Device Role / Timing Role: TVS mounted differential across signal and return, referenced to local ground. Use Value: Clamps ESD and inductive kickback to <13 V, preserving ADC front-end integrity without affecting 0.1% measurement accuracy. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeds |
|
Use Scenario: Secondary-side 5–12 V outputs of AC/DC adapters subject to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional suppressor on VOUT rail, cathode to rail, anode to GND. Use Value: Absorbs 600 W pulses without latch-up, enabling compliance with UL 62368-1 transient immunity requirements. |
Use Scenario: -48 V DC distribution in telecom base stations with lightning-induced surges on feed lines. IC Role / Device Role / Timing Role: Used in conjunction with higher-voltage TVS arrays to handle initial edge energy before crowbar activation. Use Value: Provides fast-response pre-clamping at 12.9 V, reducing stress on downstream 30 V-rated MOSFET switches and controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC/PPPM specs, identical SMB package. | Lacks automotive qualification; unsuitable for under-hood or safety-critical ECUs. | Select when cost sensitivity outweighs automotive reliability requirements. |
| SMCJ7.5AHE3/52 | Same electrical specs but in larger SMC (DO-214AB) package; RθJA = 50 °C/W vs. 100 °C/W. | Higher thermal mass supports higher average surge repetition rates; requires larger PCB footprint. | Choose for high-duty-cycle industrial motor drives where sustained thermal dissipation matters. |
Compared with SMBJ7.5HE3/52, the E3 variant trades automotive qualification for lower unit cost in commercial power supplies, while the SMCJ7.5AHE3/52 offers superior thermal handling at the expense of board space - making SMBJ7.5HE3/52 optimal for space-constrained AEC-Q101 designs needing 600 W clamping in minimal footprint.
Availability
SMBJ7.5HE3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power interface designs requiring stable component supply, AEC-Q101 compliance, and repeatable 600 W transient suppression performance.
Supply support for SMBJ7.5HE3/52 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and automotive-grade validation.
The SMBJ series was engineered specifically for robust, surface-mount transient protection in harsh environments - targeting 12 V and 24 V automotive, industrial, and telecom power rails where compact size and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ7.5HE3/52 at its rated peak pulse current?
The SMBJ7.5HE3/52 has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current (IPPM) of 46.5 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuits will not experience voltages exceeding 12.9 V during standardized surge events - a critical parameter for safeguarding 13.5 V absolute maximum-rated components downstream of SMBJ7.5HE3/52.
Is SMBJ7.5HE3/52 suitable for automotive applications?
Yes, SMBJ7.5HE3/52 is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3". It is rated for operating junction temperatures from –55 °C to +150 °C and meets MSL Level 1 reflow requirements, making it appropriate for under-hood engine control units, body control modules, and ADAS power conditioning where transient immunity and long-term reliability are essential - all verified in the official SMBJ7.5HE3/52 qualification report.
What does the "HE3" suffix mean in SMBJ7.5HE3/52?
The "HE3" suffix in SMBJ7.5HE3/52 indicates RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability standards. It distinguishes this variant from commercial-grade "E3" parts and halogen-free "HM3" versions - confirming that SMBJ7.5HE3/52 is certified for automotive use and manufactured to Vishay's highest reliability process controls for transient suppressors.
How does SMBJ7.5HE3/52 differ from bidirectional TVS diodes like SMBJ7.5CA?
SMBJ7.5HE3/52 is unidirectional and functions only during reverse-biased overvoltage events, with polarity marked by a cathode band. In contrast, SMBJ7.5CA is bidirectional and clamps transients of either polarity - useful for AC lines or differential signals. SMBJ7.5HE3/52 offers tighter VBR tolerance (8.33–9.21 V) and lower leakage than its bidirectional counterpart, making it preferred for DC rail protection where polarity is fixed and leakage must be minimized.
What PCB layout guidance applies to SMBJ7.5HE3/52 for optimal thermal and electrical performance?
For optimal performance, mount SMBJ7.5HE3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Use short, wide traces to minimize inductance in the clamping path, and avoid thermal reliefs on pads to maximize heat dissipation. The SMBJ7.5HE3/52's RθJA of 100 °C/W assumes this layout - deviating reduces surge endurance and increases junction temperature during repetitive transients.
SMBJ7.5HE3/52 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 42A
- 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)
SMBJ7.5HE3/52 FAQ
1.How can I place an order for SMBJ7.5HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5HE3/52 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 SMBJ7.5HE3/52 reliable?
The price and inventory of SMBJ7.5HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5HE3/52?
SMBJ7.5HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5HE3/52 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 SMBJ7.5HE3/52?
For technical support, including SMBJ7.5HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5HE3/52 requirements.
6.How does Aetrix verify that SMBJ7.5HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5HE3/52 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 SMBJ7.5HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5HE3/52?
All SMBJ7.5HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5HE3/52, 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 SMBJ7.5HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ7.5HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5HE3/52 Tags
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