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Vishay General Semiconductor - Diodes Division SMAJ7.5AHE3/61
- Part No.:
- SMAJ7.5AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5AHE3/61.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,508
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Product details
Overview
SMAJ7.5AHE3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast 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 31.0 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform). It protects MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ7.5AHE3/61 datasheet, SMAJ7.5AHE3/61 pinout, SMAJ7.5AHE3/61 application, or SMAJ7.5AHE3/61 equivalent, key selection criteria include clamping voltage margin relative to protected device's absolute maximum rating, leakage current at operating voltage, thermal resistance (RθJA = 120 °C/W), AEC-Q101 qualification status, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device in unidirectional configuration, with cathode-band polarity marking. Its silicon avalanche junction responds in <1 ps to transients, limiting voltage excursions above 7.5 V while sustaining 31.0 A surge current per 10/1000 μs waveform. The glass-passivated chip ensures stable VBR temperature coefficient (0.067 %/°C) and long-term reliability under repetitive surge stress.
Designed for PCB-level ESD and lightning-induced surge suppression, it delivers 400 W peak pulse power at TA = 25 °C-derated linearly above 25 °C per Fig. 2-with 3.3 W steady-state power dissipation on infinite heatsink. Its MSL Level 1 rating supports lead-free reflow up to 260 °C peak, and matte tin-plated leads comply with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for normal circuit operation. |
| VBR min/max | 8.33 V / 9.21 V at IT = 1.0 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction during nominal conditions. |
| VC @ IPPM | 12.9 V at 31.0 A - Clamped voltage during worst-case 10/1000 μs surge; must remain below protected device's absolute max rating. |
| PPPM | 400 W (10/1000 μs) - Peak transient energy handling capacity; defines robustness against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 100 μA - Reverse leakage at 7.5 V; low enough to avoid loading sensitive 3.3 V or 5 V logic rails. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with proper layout. |
| RθJA | 120 °C/W - Thermal resistance junction-to-ambient on standard pad layout; informs derating requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads. Cathode identified by black band; anode is unmarked end. Compliant with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensors requiring high-reliability surge immunity. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 4 kV surge tests on 2 Ω/42 Ω coupling networks without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture-related popcorning or delamination. |
| Glass-passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift in harsh environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 35 V, 100 ms) on 12 V battery-fed ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp overvoltage before it reaches LDOs or microcontrollers. Use Value: Limits voltage to ≤12.9 V during 31 A surge, preserving 5 V regulator input integrity and avoiding brownout resets. |
Use Scenario: Protecting analog outputs of pressure/temperature sensors connected to PLC analog inputs. IC Role / Device Role / Timing Role: TVS mounted across sensor output line and ground to absorb ESD (IEC 61000-4-2 ±8 kV contact) and cable discharge events. Use Value: Sub-100 ns response prevents latch-up in op-amp front-ends and maintains 12-bit ADC accuracy during field deployment. |
| Consumer USB Port ESD Protection | Telecom Line Card Surge Suppression |
Use Scenario: Safeguarding VBUS and D+/D− lines in USB 2.0 host ports against human-body-model ESD. IC Role / Device Role / Timing Role: Discrete TVS array (using individual SMAJ7.5AHE3/61 per line) shunting transients to chassis ground. Use Value: 100 μA leakage at 5 V avoids bus enumeration failures; 12.9 V clamping prevents PHY damage during ±15 kV air discharge. |
Use Scenario: Front-end protection of Ethernet PHYs and RS-485 transceivers exposed to induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device on data line pairs, coordinated with GDT or MOV secondary protection. Use Value: 400 W rating handles 10/1000 μs surges up to 31 A; low RθJL (30 °C/W) enables effective heat dissipation during multi-pulse events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A-E3/61 | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and package. | Not approved for automotive production; suitable for industrial or consumer designs without automotive qualification mandates. | Select when AEC-Q101 is not required and cost sensitivity favors non-automotive grade. |
| SMCJ7.5AHE3/61 | Higher 1500 W peak pulse power (SMC package); larger footprint (DO-214AB); same VWM/VBR/VC. | Better suited for high-energy surges (e.g., AC mains coupling, telecom primary protection); requires PCB area increase. | Choose when surge threat level exceeds 400 W capability and board space permits larger SMC package. |
Compared with SMAJ7.5AHE3/61, the SMAJ7.5A-E3/61 offers identical clamping performance at lower qualification cost, while the SMCJ7.5AHE3/61 trades compact size for 3.75× higher surge energy handling-making the SMAJ7.5AHE3/61 optimal for space-constrained AEC-Q101-compliant 12 V DC systems.
Availability
SMAJ7.5AHE3/61 is available at Aetrix Electronics and suitable for automotive control units, industrial sensor nodes, consumer USB power delivery circuits, and telecom line interface modules requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMAJ7.5AHE3/61 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, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series was developed for high-volume, space-constrained transient protection in automotive and industrial electronics, balancing low profile, AEC-Q101 compliance, and repeatable clamping performance across temperature and life cycle.
FAQ
What is the maximum clamping voltage of the SMAJ7.5AHE3/61 under a 10/1000 μs surge?
The SMAJ7.5AHE3/61 has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 31.0 A using the standardized 10/1000 μs waveform. This value is measured at TJ = 25 °C and is guaranteed per the Vishay datasheet revision 09-Jan-2024. Designers must verify that 12.9 V remains safely below the absolute maximum voltage rating of the protected IC or MOSFET.
Is SMAJ7.5AHE3/61 qualified to AEC-Q101, and what does that mean for automotive use?
Yes, SMAJ7.5AHE3/61 is explicitly AEC-Q101 qualified, as confirmed by the "HE3" suffix and documentation in the Vishay datasheet. This qualification validates its reliability for automotive applications-including engine control, body electronics, and ADAS sensors-under temperature cycling, humidity bias, mechanical shock, and surge endurance testing. The SMAJ7.5AHE3/61 meets all stress test requirements defined in AEC-Q101 Rev D.
How does the leakage current of SMAJ7.5AHE3/61 affect low-power sensor circuits?
The SMAJ7.5AHE3/61 exhibits a maximum reverse leakage current (ID) of 100 μA at its 7.5 V stand-off voltage (VWM), measured at 25 °C. In battery-powered sensor nodes operating at 3.3 V or 5 V, this leakage is negligible-contributing less than 0.1 % of typical sleep-mode current. At elevated temperatures, leakage increases modestly but remains within design margins for most industrial and automotive sensor applications.
Can SMAJ7.5AHE3/61 be used in bidirectional configurations?
No, SMAJ7.5AHE3/61 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only when the cathode is more positive than the anode. For bidirectional protection (e.g., AC lines or differential data buses), the SMAJ7.5CA variant must be used. Using SMAJ7.5AHE3/61 in reverse-biased AC applications risks permanent failure due to forward conduction during negative half-cycles.
What PCB layout practices maximize thermal performance of SMAJ7.5AHE3/61 during repeated surges?
To optimize thermal performance of SMAJ7.5AHE3/61, Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Use internal ground/power planes connected via ≥4 thermal vias per pad, minimize trace length between TVS and protected node, and avoid routing high-speed signals near the device. These practices reduce RθJA from 120 °C/W toward the specified 30 °C/W junction-to-lead value and prevent localized overheating during repetitive 0.01 % duty-cycle surges.
SMAJ7.5AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 31A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ7.5AHE3/61 FAQ
1.How can I place an order for SMAJ7.5AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5AHE3/61 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 SMAJ7.5AHE3/61 reliable?
The price and inventory of SMAJ7.5AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.5AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ7.5AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5AHE3/61?
SMAJ7.5AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5AHE3/61 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 SMAJ7.5AHE3/61?
For technical support, including SMAJ7.5AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5AHE3/61 requirements.
6.How does Aetrix verify that SMAJ7.5AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5AHE3/61 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 SMAJ7.5AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ7.5AHE3/61?
All SMAJ7.5AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5AHE3/61, 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 SMAJ7.5AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ7.5AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.5AHE3/61 Tags
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