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Vishay General Semiconductor - Diodes Division SMA5J7.5HE3/5A
- Part No.:
- SMA5J7.5HE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J7.5HE3/5A.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,578
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Product details
Overview
SMA5J7.5HE3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection 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 1.0 mA), 12.9 V clamping voltage (VC) at 38.8 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to protect automotive ECUs, industrial sensor interfaces, and power supply inputs against ESD and load dump transients.
For engineers reviewing the SMA5J7.5HE3/5A datasheet, SMA5J7.5HE3/5A pinout, SMA5J7.5HE3/5A application, or SMA5J7.5HE3/5A equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <100 µA leakage at 7.5 V, then rapidly avalanches when transient voltage exceeds 8.33 V to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
The device is rated for non-repetitive 10/1000 µs surges up to 38.8 A, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), enabling reliable operation in automotive under-hood environments where ambient temperatures reach 125 °C and board layout uses minimum recommended pad area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected circuit's nominal DC rail. |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - guaranteed avalanche onset range; ensures consistent clamping threshold across production lots. |
| VC @ IPPM | 12.9 V at 38.8 A - maximum clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by protected IC. |
| PPPM | 500 W - peak pulse power handling capability; supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| TJ max | +150 °C - maximum junction temperature; enables use in AEC-Q101-qualified automotive modules without derating at 125 °C ambient. |
| Package | DO-214AC (SMA) - surface-mount package with 5.28 mm × 4.50 mm footprint, compatible with JEDEC-standard reflow profiles up to 260 °C peak. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with two axial leads; cathode indicated by band on body end; terminals are matte tin-plated for solderability per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes conduction path during reverse-biased surge event. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V battery rail); avalanche conduction initiates here when VIN > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias HAST, and mechanical shock - required for engine control, ADAS, and body electronics. |
| Glass-passivated junction | Stable VBR tolerance and low leakage (<100 µA) over lifetime; prevents parameter drift under thermal stress and humidity exposure. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH; no baking required prior to reflow - simplifies SMT manufacturing and reduces assembly cost. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD), improving protection margin for sensitive 3.3 V or 5 V logic interfaces. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VIN and GND, clamping surges within 1 ns to limit voltage to ≤12.9 V. Use Value: Prevents latch-up or permanent damage to MCU internal LDOs and I/O cells during 35 V/100 ms transients with 500 W peak energy absorption. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation systems exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Bidirectional-capable but used unidirectionally across sensor supply rail; clamps negative-going transients to GND while blocking positive surges via series diode. Use Value: Maintains signal integrity below ±10 mV error band by limiting transient-induced offset shift and avoiding sensor reset events. |
| Consumer Power Adapter Input Protection | Telecom DC Feeder Line Protection |
Use Scenario: Front-end surge suppression on 19 V input of laptop AC/DC adapters subjected to lightning-induced surges on mains-connected secondary side. IC Role / Device Role / Timing Role: Primary-level TVS on DC bus before primary controller IC; absorbs energy before it reaches PWM IC and MOSFET gate drivers. Use Value: Enables compliance with IEC 61000-4-5 Level 3 (2 kV line-earth) without adding bulkier MOVs or increasing bill-of-materials count. |
Use Scenario: Overvoltage protection on -48 V DC feeder lines powering remote radio units in 4G/5G base stations, exposed to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground on negative rail; clamps positive excursions above -40 V to prevent damage to PoE controllers and Ethernet PHYs. Use Value: Provides fail-safe shutdown margin of ≥10 V below absolute maximum rating of -30 V telecom ICs, ensuring zero field returns due to surge overstress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J7.5A-E3/5A | Same electrical specs (VWM, VBR, VC, PPPM) but commercial-grade; lacks AEC-Q101 qualification and JESD 201 class 2 whisker test. | Approved for industrial and consumer designs only; not permitted in automotive OEM or Tier-1 production. | Select when cost sensitivity outweighs automotive qualification requirements and long-term reliability under thermal cycling is not critical. |
| SMCJ7.5AHE3/5A | Same VWM/VBR but higher PPPM = 1500 W and larger DO-214AB (SMC) package; RθJA = 25 °C/W vs. 80 °C/W. | Used where surge energy exceeds 500 W (e.g., heavy-duty truck battery systems) and PCB space allows 7.11 mm × 6.22 mm footprint. | Choose when system-level testing reveals repeated clipping events exceeding 38.8 A or when junction temperature rise must stay below 20 °C at full surge. |
Compared with SMA5J7.5A-E3/5A, the SMA5J7.5HE3/5A adds automotive qualification and enhanced whisker resistance; compared with SMCJ7.5AHE3/5A, it trades surge capacity for smaller size and lower thermal resistance - making SMA5J7.5HE3/5A optimal for space-constrained AEC-Q101-compliant modules needing 500 W protection.
Availability
SMA5J7.5HE3/5A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor nodes, and telecom power feeders requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMA5J7.5HE3/5A 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, efficiency, and automotive-grade performance.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, surface-mount surge protection in harsh-environment applications including automotive, industrial, and telecom infrastructure.
FAQ
What is the polarity configuration of SMA5J7.5HE3/5A?
The SMA5J7.5HE3/5A is a unidirectional transient voltage suppressor diode, with cathode marked by a band on the DO-214AC package body. It conducts only when the cathode is biased positively relative to the anode - making it suitable for DC rail protection where polarity is fixed, unlike bi-directional variants that omit the band marking.
Does SMA5J7.5HE3/5A meet automotive qualification standards?
Yes, SMA5J7.5HE3/5A is AEC-Q101 qualified, verified per the Vishay datasheet revision 24-Oct-12 (Document Number: 88875). This includes stress testing for temperature cycling, high-temperature operating life, and mechanical shock - confirming suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of SMA5J7.5HE3/5A during a surge event?
The SMA5J7.5HE3/5A has a maximum clamping voltage (VC) of 12.9 V at 38.8 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the highest voltage imposed on the protected circuit during worst-case surge conduction.
Can SMA5J7.5HE3/5A be used in place of SMA5J7.5A-E3/5A?
Yes, SMA5J7.5HE3/5A is a direct functional replacement for SMA5J7.5A-E3/5A with identical electrical parameters, but adds AEC-Q101 qualification and JESD 201 class 2 whisker resistance. No PCB layout change is needed - both share DO-214AC (SMA) package and pinout - though automotive use requires the HE3 suffix version.
What is the thermal resistance specification for SMA5J7.5HE3/5A?
SMA5J7.5HE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" copper pads per terminal, and junction-to-lead resistance (RθJL) of 25 °C/W. These values determine allowable power dissipation and junction temperature rise under sustained surge duty cycles.
SMA5J7.5HE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 35A
- Power - Peak Pulse:
- 500W
- 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-214AC (SMA)
SMA5J7.5HE3/5A FAQ
1.How can I place an order for SMA5J7.5HE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J7.5HE3/5A 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 SMA5J7.5HE3/5A reliable?
The price and inventory of SMA5J7.5HE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J7.5HE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J7.5HE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J7.5HE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J7.5HE3/5A?
SMA5J7.5HE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J7.5HE3/5A 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 SMA5J7.5HE3/5A?
For technical support, including SMA5J7.5HE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J7.5HE3/5A requirements.
6.How does Aetrix verify that SMA5J7.5HE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J7.5HE3/5A 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 SMA5J7.5HE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J7.5HE3/5A?
All SMA5J7.5HE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J7.5HE3/5A, 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 SMA5J7.5HE3/5A part is unused and in its original packaging.
Return procedure for SMA5J7.5HE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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