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Vishay General Semiconductor - Diodes Division SMBJ7.5AHE3/5B
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- Part No.:
- SMBJ7.5AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5AHE3/5B.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,905
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Product details
Overview
SMBJ7.5AHE3/5B 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 capability with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ7.5AHE3/5B datasheet, SMBJ7.5AHE3/5B pinout, SMBJ7.5AHE3/5B application, or SMBJ7.5AHE3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 °C to +150 °C), and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a voltage-clamping protection device in series with DC supply paths or parallel to sensitive inputs. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
The SMBJ7.5AHE3/5B is rated for 5.0 W steady-state power dissipation at TA = 50 °C, supports 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), and exhibits a positive temperature coefficient of VBR (+0.067 %/°C), ensuring predictable voltage shift across operating temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse working voltage before clamping begins; sets upper limit for normal DC rail operation. |
| VBR min/max | 8.33 V / 9.21 V at IT = 1.0 mA - Confirmed breakdown threshold range defining turn-on consistency across production lots. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamped voltage during worst-case 10/1000 µs transient; determines protected circuit's maximum overvoltage exposure. |
| PPPM | 600 W - Peak pulse power handling per single transient; defines survivability against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 100 µA - Reverse leakage at rated stand-off; low enough to avoid loading 3.3 V/5 V logic rails or high-impedance sensor outputs. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or enclosed industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line (e.g., VCC); conducts surge current to ground when voltage exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS power domains. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to ±1 kV open-circuit / ±500 A short-circuit without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage stress on downstream silicon; critical for protecting 12 V-rated gate drivers and microcontroller I/O pins. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable leakage and breakdown characteristics over lifetime; resists humidity-induced parameter drift in harsh environments. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 12 V DC input stage against load dump and inductive kickback from relay coils and solenoids. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp transients before they reach switching controller. Use Value: Limits voltage excursion to ≤12.9 V during 100 V/500 ms load dump event, preventing latch-up or gate oxide damage in buck controller ICs. |
Use Scenario: Safeguarding LIN bus transceiver power pins against battery reversal and jump-start surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBAT supply line of LIN transceiver ICs to absorb reverse-polarity energy and clamp positive spikes. Use Value: Withstands –14 V reverse bias and clamps +200 V transients to <13 V, preserving transceiver functionality per ISO 16750-2. |
| Consumer Power Adapters | Industrial Sensor Signal Conditioning |
|
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V USB-C PD adapter output rails. IC Role / Device Role / Timing Role: Fast-response TVS parallel to output capacitor to suppress flyback transformer ringing and ESD events on USB port. Use Value: Clamps 1.5 kV ESD contact discharge to <13 V within <1 ns, preventing damage to USB-PD controller and Type-C CC logic. |
Use Scenario: Input protection for 4–20 mA current-loop transmitter front-end op-amps exposed to field wiring surges. IC Role / Device Role / Timing Role: Low-leakage TVS on analog input terminals to shunt induced transients while maintaining µA-level loop accuracy. Use Value: 100 µA max leakage at 7.5 V ensures <0.5% error in 20 mA full-scale measurement; 12.9 V clamping preserves op-amp CMRR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A-E3/5B | Commercial-grade (non-AEC-Q101), same electrical specs and SMB package. | Lacks automotive qualification; not approved for under-hood or safety-critical vehicle subsystems. | Select when cost-sensitive industrial or consumer designs do not require automotive reliability validation. |
| SMCJ7.5AHE3/5B | Same VWM/VBR/VC but in larger SMC (DO-214AB) package; 1500 W PPPM rating. | Higher power handling enables longer surge duration immunity; requires larger PCB footprint and higher thermal mass. | Choose when system-level surge testing exceeds 600 W (e.g., IEC 61000-4-5 Level 5) or board layout allows SMC footprint. |
Compared with SMBJ7.5A-E3/5B, the SMBJ7.5AHE3/5B adds AEC-Q101 qualification for automotive use, while the SMCJ7.5AHE3/5B trades compact SMB size for 2.5× higher pulse power - enabling robustness upgrades without changing circuit topology.
Availability
SMBJ7.5AHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, consumer power adapters, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ7.5AHE3/5B 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and computing systems where robustness against ESD, EFT, and surge events is mandatory.
FAQ
What is the clamping voltage of SMBJ7.5AHE3/5B at its rated peak pulse current?
The SMBJ7.5AHE3/5B has a maximum clamping voltage (VC) of 12.9 V at its specified peak pulse current (IPPM) of 46.5 A using the 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during a transient event. The SMBJ7.5AHE3/5B maintains this clamping performance across its qualified operating temperature range.
Is SMBJ7.5AHE3/5B suitable for automotive applications?
Yes, SMBJ7.5AHE3/5B is AEC-Q101 qualified, making it suitable for automotive applications including body control modules, infotainment power supplies, and sensor interfaces. The HE3 suffix explicitly denotes AEC-Q101 qualification, and the device meets requirements for temperature cycling, highly accelerated life testing, and surge immunity per automotive standards. SMBJ7.5AHE3/5B is rated for operation from –55 °C to +150 °C junction temperature.
What does the "5B" in SMBJ7.5AHE3/5B indicate?
The "5B" in SMBJ7.5AHE3/5B refers to the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This format supports high-volume automated SMT placement and is distinct from the "52" code (7-inch reel, 750 units). The "HE3" portion confirms RoHS-compliance and AEC-Q101 qualification, while "SMBJ7.5A" identifies the electrical variant with 7.5 V stand-off voltage.
How does SMBJ7.5AHE3/5B differ from bidirectional variants like SMBJ7.5CA?
The SMBJ7.5AHE3/5B is unidirectional, meaning it conducts only during reverse-bias overvoltage events and blocks forward current beyond its VF (~3.5 V at 50 A). In contrast, SMBJ7.5CA is bidirectional and clamps transients of either polarity, with symmetric VBR and VC ratings. SMBJ7.5AHE3/5B is used on DC rails with defined polarity (e.g., VCC-to-GND), whereas SMBJ7.5CA suits AC-coupled or floating signal lines. Polarity marking (cathode band) applies only to unidirectional types like SMBJ7.5AHE3/5B.
What is the thermal resistance and how does it affect SMBJ7.5AHE3/5B layout?
The SMBJ7.5AHE3/5B 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. This value assumes minimal PCB copper; increasing pad area or adding internal ground planes reduces RθJA and improves power handling. For continuous 5.0 W dissipation, ambient must stay below 50 °C - underscoring the need for adequate copper pour and airflow in high-power surge environments. SMBJ7.5AHE3/5B thermal performance is validated per JESD51-7.
SMBJ7.5AHE3/5B 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- 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 (SMBJ)
SMBJ7.5AHE3/5B FAQ
1.How can I place an order for SMBJ7.5AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5AHE3/5B 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 SMBJ7.5AHE3/5B reliable?
The price and inventory of SMBJ7.5AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ7.5AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5AHE3/5B?
SMBJ7.5AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5AHE3/5B 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 SMBJ7.5AHE3/5B?
For technical support, including SMBJ7.5AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5AHE3/5B requirements.
6.How does Aetrix verify that SMBJ7.5AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5AHE3/5B 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 SMBJ7.5AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ7.5AHE3/5B?
All SMBJ7.5AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5AHE3/5B, 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 SMBJ7.5AHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ7.5AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5AHE3/5B Tags
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