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Vishay General Semiconductor - Diodes Division SMBJ7.5-E3/5B
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- Part No.:
- SMBJ7.5-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5-E3/5B.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,736
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Product details
Overview
SMBJ7.5-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and ESD events on power rails and signal lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the SMBJ7.5-E3/5B datasheet, SMBJ7.5-E3/5B pinout, SMBJ7.5-E3/5B application, or SMBJ7.5-E3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, junction-to-lead resistance, RoHS-compliant packaging details, and AEC-Q101 qualification status - all specific to the SMBJ7.5-E3/5B variant.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, optimized for fast response (<1 ps) to transient overvoltages. Its glass-passivated junction ensures stable leakage performance (≤100 µA at VWM) and low incremental surge resistance, enabling precise voltage limiting during 8.3 ms half-sine surges up to 100 A (IFSM).
Thermally, it exhibits RθJL = 20 °C/W (junction-to-lead) and RθJA = 100 °C/W (junction-to-ambient on 5.0 mm × 5.0 mm copper pads), supporting operation from –55 °C to +150 °C. The device meets MSL Level 1 per J-STD-020 and is rated for 0.01% duty cycle repetitive surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before significant leakage begins; sets safe margin below system rail voltage. |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1.0 mA - Confirmed breakdown range defining turn-on threshold under standardized test conditions. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamped voltage during 10/1000 µs surge; determines worst-case overvoltage seen by protected IC. |
| PPPM | 600 W - Peak pulse power handling capability; defines transient energy absorption capacity without failure. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports high-energy inductive kickback suppression. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.21 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected circuit (e.g., ground or return path); conducts during forward surge events. |
| Cathode | Reverse-biased clamping terminal | Connected to higher-potential line (e.g., 12 V rail); initiates avalanche breakdown when VAK exceeds VBR, diverting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a transients in 12 V automotive systems without derating. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage stress on downstream MOSFETs or microcontrollers during clamping action. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow compatibility at peak temperature ≤260 °C without baking preconditioning. |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance; suitable for consumer and industrial PCB assembly. |
| 100 A IFSM rating | Supports protection of relay drivers and solenoid interfaces subject to high-current inductive turn-off spikes. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between supply rail and ground, triggered within picoseconds of overvoltage onset. Use Value: Limits transient voltage to ≤12.9 V during 46.5 A surges, preventing latch-up or gate oxide damage in 5 V/3.3 V interface ICs. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to field-wiring induced transients from motor contactors or solenoids. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across 24 V DC input terminals, absorbing repetitive 600 W surges without degradation. Use Value: Maintains <100 µA leakage at 7.5 V, ensuring no false triggering of optocoupler-based input detection circuitry. |
| Consumer Power Adapter Input | Telecom Line Card Surge Suppression |
|
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V USB-C adapter outputs subjected to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Fast-acting unidirectional clamp referenced to common ground, activated before LDO or USB controller overvoltage thresholds are exceeded. Use Value: Achieves 12.9 V clamping at 46.5 A with <1 ps response, meeting IEC 61000-4-2 Level 4 (15 kV air) immunity requirements. |
Use Scenario: Primary protection stage on Ethernet PHY or RS-485 transceiver power rails in telecom base station line cards. IC Role / Device Role / Timing Role: First-line transient shunt on 3.3 V or 5 V bias rails, coordinated with upstream GDT or MOV for multi-stage protection. Use Value: Provides precise 7.5 V standoff with ±0.88 V VBR tolerance, enabling tight coordination with secondary TVS or crowbar circuits. |
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-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No difference in circuit function or layout; differs only in material compliance (halogen-free molding compound). | Select when halogen-free manufacturing or IPC-1752A reporting is required. |
| SMBJ7.5AHE3_B/I | AEC-Q101 qualified version with same VWM, VBR, and VC; rated for automotive grade (-40 °C to +125 °C ambient). | Approved for under-hood automotive use; includes extended reliability testing (HTOL, TC, UHAST) not performed on commercial E3 grade. | Choose for automotive OEM or Tier-1 designs requiring AEC-Q101 certification and full PPAP support. |
Compared with SMBJ7.5-E3/5B, the M3/5B variant offers identical protection performance with halogen-free compliance, while the HE3_B/I adds AEC-Q101 qualification for automotive deployment - neither is pin-compatible drop-in replacements but share identical footprint, polarity, and electrical behavior in non-automotive contexts.
Availability
SMBJ7.5-E3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O conditioning, and consumer power adapter surge suppression requiring stable component supply and consistent RoHS-compliant sourcing.
Supply support for SMBJ7.5-E3/5B 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, precision, and high-volume manufacturability.
The SMBJ series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where repeatable clamping performance and thermal stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ7.5-E3/5B at its rated peak pulse current?
The SMBJ7.5-E3/5B has a maximum clamping voltage (VC) of 12.9 V at 46.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ7.5-E3/5B maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C) with minimal drift.
Is SMBJ7.5-E3/5B suitable for bidirectional transient protection?
No, SMBJ7.5-E3/5B is a unidirectional TVS diode, identified by its cathode band marking and specified breakdown characteristics only in reverse bias. For bidirectional protection, Vishay offers the SMBJ7.5CA variant (with CA suffix), which provides symmetrical clamping in both polarities. Using SMBJ7.5-E3/5B in bidirectional applications risks forward conduction and potential failure during positive transients.
What does the "E3/5B" suffix indicate in SMBJ7.5-E3/5B?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads and JESD201 Class 2 whisker resistance. The "5B" indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This format supports high-speed SMT placement and complies with IPC-7351B land pattern standards for SMB (DO-214AA) devices.
Does SMBJ7.5-E3/5B meet AEC-Q101 qualification?
No, SMBJ7.5-E3/5B is a commercial-grade part and is not AEC-Q101 qualified. Vishay offers the SMBJ7.5AHE3_B/I variant for automotive applications, which undergoes full AEC-Q101 stress testing including HTOL, temperature cycling, and unbiased HAST. The SMBJ7.5-E3/5B remains appropriate for industrial, consumer, and telecom uses where automotive qualification is not mandated.
How does thermal resistance affect SMBJ7.5-E3/5B's surge handling capability?
SMBJ7.5-E3/5B has RθJL = 20 °C/W (junction-to-lead) and RθJA = 100 °C/W (junction-to-ambient on 5.0 mm × 5.0 mm copper pads). Higher ambient temperatures reduce allowable surge repetition rate due to junction heating; derating curves in Figure 2 of the datasheet show >50% reduction in PPPM above 85 °C ambient. Proper PCB copper area and thermal vias are essential to sustain 600 W pulses in sustained operation.
SMBJ7.5-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ7.5-E3/5B FAQ
1.How can I place an order for SMBJ7.5-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5-E3/5B 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 SMBJ7.5-E3/5B reliable?
The price and inventory of SMBJ7.5-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ7.5-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5-E3/5B?
SMBJ7.5-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5-E3/5B 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 SMBJ7.5-E3/5B?
For technical support, including SMBJ7.5-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5-E3/5B requirements.
6.How does Aetrix verify that SMBJ7.5-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5-E3/5B 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 SMBJ7.5-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ7.5-E3/5B?
All SMBJ7.5-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5-E3/5B, 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 SMBJ7.5-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ7.5-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5-E3/5B Tags
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