My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ7.0AHE3_A/I
- Part No.:
- SMAJ7.0AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.0AHE3_A/I.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,915
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ7.0AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA, 12.0 V maximum clamping voltage (VC) at 33.3 A peak pulse current, and 400 W peak pulse power (10/1000 μs). It protects MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.
For engineers reviewing the SMAJ7.0AHE3_A/I datasheet, SMAJ7.0AHE3_A/I pinout, SMAJ7.0AHE3_A/I application, or SMAJ7.0AHE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a clamping device-conducting only when reverse voltage exceeds its breakdown threshold to divert surge energy away from protected circuitry. Its glass-passivated junction ensures stable VBR tolerance and fast response (<1 ns), while the SMA package provides MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility.
The device is rated for non-repetitive 400 W pulses (10/1000 μs) up to 33.3 A, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead). It meets UL 497B recognition (QVGQ2) and supports bidirectional variants via CA suffix, though SMAJ7.0AHE3_A/I is strictly unidirectional with cathode band marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - Confirmed breakdown window ensuring reliable turn-on without premature conduction. |
| VC @ IPPM | 12.0 V at 33.3 A - Clamped voltage during 400 W transient; determines maximum stress on downstream components. |
| PPPM | 400 W (10/1000 μs) - Surge handling capacity for inductive switching events like relay coil decay or motor commutation. |
| ID @ VWM | 800 μA - Reverse leakage at stand-off voltage; low enough to avoid power loss or false triggering in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive or industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to protected line's low-side or ground reference; completes clamping loop during overvoltage. |
| Cathode | Reverse voltage sensing / clamping output | Connected to protected line's high-side (e.g., 12 V rail); conducts when VAK > VBR, shunting surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Handles automotive load-dump surges and industrial inductive spikes without degradation. |
| Glass passivated chip junction | Ensures tight VBR tolerance (±5%), long-term stability, and resistance to humidity-induced parameter drift. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics including engine control units, body modules, and ADAS sensor interfaces. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD or lightning-induced surges). |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply lines in engine control units against ISO 7637-2 pulse 1 (inductive switch-off) and pulse 2a (load dump). IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and DC/DC converter input. Use Value: Limits transient voltage to ≤12.0 V, preventing latch-up or gate oxide damage in downstream PMICs and microcontrollers. |
Use Scenario: Shielding analog outputs of pressure or temperature sensors from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: Low-leakage (800 μA) TVS mounted directly at connector interface, ahead of op-amp input stage. Use Value: Prevents sensor signal corruption and ADC saturation during ±8 kV contact ESD (IEC 61000-4-2), preserving measurement integrity. |
| Consumer Device USB Port Protection | Telecom Line Card Surge Suppression |
|
Use Scenario: Safeguarding VBUS line in USB 2.0 host ports against hot-plug transients and external ESD coupling. IC Role / Device Role / Timing Role: Stand-off-rated (7.0 V) TVS placed between USB connector and USB controller's VBUS pin. Use Value: Clamps 10/1000 μs surges to 12.0 V within nanoseconds, meeting USB-IF electrical compliance for overvoltage immunity. |
Use Scenario: Front-end protection of Ethernet PHY power pins in telecom base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: High-energy (400 W) TVS integrated into primary protection stage alongside GDTs and MOVs. Use Value: Absorbs first 400 W of surge energy before secondary protectors activate, extending overall system surge lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0A-E3/61 | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC specs, identical SMA package. | Lacks automotive qualification; suitable for consumer or industrial non-automotive use. | Select when AEC-Q101 is not required and cost optimization is prioritized. |
| SMAJ7.0CAHE3_A/I | Bidirectional variant with symmetric VBR (7.78–8.60 V), same clamping and power ratings. | Used where AC-coupled or dual-polarity signals require protection in both directions (e.g., RS-485 bus). | Choose for differential or floating signal lines needing symmetrical clamping behavior. |
Compared with SMAJ7.0AHE3_A/I, SMAJ7.0A-E3/61 offers identical electrical performance but no automotive qualification, while SMAJ7.0CAHE3_A/I provides bidirectional clamping-neither is pin-compatible drop-in replacement due to polarity and qualification differences, requiring schematic and layout review.
Availability
SMAJ7.0AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, and telecom line card designs requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMAJ7.0AHE3_A/I 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 and application-specific performance.
The SMAJ series was developed for robust, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where high-energy surge immunity and long-term parametric stability are critical.
FAQ
What is the maximum clamping voltage of SMAJ7.0AHE3_A/I at its rated peak pulse current?
The SMAJ7.0AHE3_A/I has a maximum clamping voltage (VC) of 12.0 V at its rated peak pulse current (IPPM) of 33.3 A under a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ7.0AHE3_A/I maintains this clamping performance across its specified operating temperature range.
Is SMAJ7.0AHE3_A/I suitable for automotive applications?
Yes, SMAJ7.0AHE3_A/I is AEC-Q101 qualified, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor modules. Its HE3 suffix explicitly denotes AEC-Q101 qualification, and it meets UL 497B recognition (QVGQ2) for surge protector classification. The SMAJ7.0AHE3_A/I operates reliably from −55 °C to +150 °C junction temperature.
How does the SMAJ7.0AHE3_A/I differ from the SMAJ7.0CAHE3_A/I variant?
The SMAJ7.0AHE3_A/I is unidirectional with cathode band marking and clamps only in reverse bias, whereas SMAJ7.0CAHE3_A/I is bidirectional with symmetric breakdown in both polarities and no polarity marking. Both share identical VWM (7.0 V), VBR (7.78–8.60 V), and VC (12.0 V), but SMAJ7.0CAHE3_A/I is used for AC or floating signal lines. They are not interchangeable without schematic revision.
What is the thermal resistance of SMAJ7.0AHE3_A/I, and how does it affect PCB layout?
The SMAJ7.0AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To maintain safe operation under repetitive surges, the datasheet specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Reducing RθJA via larger copper areas or internal planes directly lowers steady-state junction temperature and improves surge endurance for the SMAJ7.0AHE3_A/I.
Does SMAJ7.0AHE3_A/I meet RoHS and halogen-free requirements?
Yes, SMAJ7.0AHE3_A/I is RoHS-compliant and AEC-Q101 qualified. The "HE3" suffix indicates RoHS compliance and automotive qualification; it is not halogen-free (that requires "HM3" suffix). The molding compound meets UL 94 V-0 flammability rating, and terminals are matte tin plated per J-STD-002. Full compliance documentation for SMAJ7.0AHE3_A/I is available upon request.
SMAJ7.0AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 33.3A
- 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)
SMAJ7.0AHE3_A/I FAQ
1.How can I place an order for SMAJ7.0AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.0AHE3_A/I 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 SMAJ7.0AHE3_A/I reliable?
The price and inventory of SMAJ7.0AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.0AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ7.0AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.0AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.0AHE3_A/I?
SMAJ7.0AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.0AHE3_A/I 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 SMAJ7.0AHE3_A/I?
For technical support, including SMAJ7.0AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.0AHE3_A/I requirements.
6.How does Aetrix verify that SMAJ7.0AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ7.0AHE3_A/I 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 SMAJ7.0AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ7.0AHE3_A/I?
All SMAJ7.0AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.0AHE3_A/I, 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 SMAJ7.0AHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ7.0AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.0AHE3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
