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Vishay General Semiconductor - Diodes Division SMAJ7.5CHE3/5A
- Part No.:
- SMAJ7.5CHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5CHE3/5A.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,906
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Product details
Overview
SMAJ7.5CHE3/5A from Vishay General Semiconductor is a high-reliability, AEC-Q101-qualified bi-directional transient voltage suppressor (TVS) in DO-214AC (SMA) package, designed for automotive and industrial overvoltage protection. It features 7.5 V stand-off voltage (VWM), 14.3 V maximum clamping voltage (VC) at 28.0 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), protecting sensitive MOSFETs and sensor signal lines against ESD and inductive switching transients.
For engineers reviewing the SMAJ7.5CHE3/5A datasheet, SMAJ7.5CHE3/5A pinout, SMAJ7.5CHE3/5A application, or SMAJ7.5CHE3/5A equivalent, this device is evaluated for robust surge immunity in automotive powertrain control units, industrial PLC I/O modules, and automotive-grade sensor interface circuits where AEC-Q101 qualification, low leakage (<1 µA at VWM), and stable clamping performance under repetitive transients are critical selection criteria.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities with identical electrical characteristics - breakdown voltage (VBR) of 8.33–10.2 V at 1.0 mA test current, and clamping voltage ≤14.3 V up to 28.0 A. Its glass-passivated junction ensures stable parametric behavior across temperature (–55 °C to +150 °C).
The device delivers 400 W peak pulse power per 10/1000 µs waveform when mounted on 0.2 × 0.2" copper pads, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. It meets J-STD-020 MSL Level 1, RoHS 2002/95/EC, and AEC-Q101 stress requirements including solder dip (260 °C, 40 s) and whisker resistance (JESD201 Class 2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 7.5 V - Maximum continuous reverse working voltage before clamping begins; defines circuit operating margin below breakdown. |
| Clamping Voltage (VC) | 14.3 V at 28.0 A - Peak voltage seen by protected circuit during worst-case 10/1000 µs surge; determines downstream component voltage stress. |
| Peak Pulse Power (PPPM) | 400 W - Surge energy handling capability under standard 10/1000 µs waveform; enables protection against ISO 7637-2 Pulse 1/2a/5a events. |
| Breakdown Voltage (VBR) | 8.33–10.2 V at 1.0 mA - Confirmed bi-directional conduction threshold; ensures symmetrical response to positive/negative transients. |
| Reverse Leakage (ID) | <1 µA at 7.5 V - Minimal DC loading on signal/power lines; preserves accuracy in low-current sensor or reference circuits. |
| Operating Temperature | –55 °C to +150 °C - Full specification compliance across automotive under-hood and industrial ambient conditions. |
| AEC-Q101 Qualified | Yes - Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces per stress test requirements. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional transient path | Either terminal serves as input/output for surge current; no cathode band marking required for bi-directional operation. |
| Case (body) | Thermal and mechanical interface | DO-214AC molded case provides mechanical stability and aids heat dissipation via PCB copper pads (0.2 × 0.2" recommended). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive reliability including temperature cycling, HTRB, and surge endurance - enables use in safety-critical ECUs without additional qualification effort. |
| 400 W peak pulse power | Supports protection against high-energy transients such as load dump (ISO 16750-2) and inductive kickback in 12 V systems. |
| Low clamping ratio (VC/VWM = 1.91) | Minimizes overvoltage stress on downstream ICs - critical for safeguarding 5 V or 3.3 V logic interfaces connected to unprotected lines. |
| J-STD-020 MSL Level 1 | Unlimited floor life at ≤30 °C/60 % RH - eliminates bake requirements prior to reflow, reducing manufacturing cost and risk of moisture-induced defects. |
| Matte tin-plated leads | Ensures reliable solder wetting per J-STD-002 and JESD22-B102 - supports high-yield automated assembly in automotive Tier 1 production lines. |
Applications
| Automotive Powertrain Sensors | Industrial PLC Analog Input Modules |
|---|---|
Use Scenario: Protecting crankshaft/camshaft position sensor signal lines from inductive switching noise and battery load dump transients in engine control units. IC Role / Device Role / Timing Role: Bi-directional TVS clamping transient energy before it reaches the sensor signal conditioner IC or microcontroller ADC input. Use Value: Prevents false triggering or latch-up in Hall-effect or variable reluctance sensors operating at 5 V, maintaining engine timing integrity under harsh EMI conditions. |
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from field wiring surges caused by relay coil de-energization or lightning-induced coupling. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed across input terminals to shunt >1 kV transients while preserving loop accuracy and zero-point stability. Use Value: Enables uninterrupted analog acquisition during factory floor electrical disturbances, avoiding process shutdowns due to input saturation or ADC overflow. |
| Automotive Body Control Modules | Automotive Camera Sensor Interfaces |
Use Scenario: Safeguarding LIN bus transceivers and window motor driver ICs from electrostatic discharge and alternator ripple in door module assemblies. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS placed at connector entry point to absorb ESD (IEC 61000-4-2 ±15 kV contact) without distorting LIN data signals. Use Value: Maintains LIN communication integrity during vehicle assembly and service operations, eliminating intermittent bus faults linked to human-body-model discharges. |
Use Scenario: Protecting MIPI CSI-2 differential pairs in surround-view camera modules from cable-borne transients during vehicle wash or roadside ESD events. IC Role / Device Role / Timing Role: Compact DO-214AC TVS deployed adjacent to image sensor connector to limit common-mode surge voltage without adding skew or jitter to high-speed video signals. Use Value: Preserves pixel clock stability and frame synchronization by limiting clamping-induced signal distortion - critical for ASIL-B functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5AHE3/5A | Uni-directional variant; cathode band marked; VC = 12.9 V at 31.0 A; same VWM, PPPM, and AEC-Q101 rating. | Requires correct polarity orientation; suited for DC-biased lines like power rails where unidirectional clamping suffices. | Select SMAJ7.5AHE3/5A only when circuit topology guarantees consistent polarity and lower clamping voltage is prioritized over layout flexibility. |
| SMBJ7.5CHE3/5A | Same VWM and bi-directional function but in larger DO-214AA (SMB) package; higher IPPM (33.0 A) and VC (14.4 V); identical AEC-Q101 qualification. | Requires more PCB area; better thermal mass for higher average surge duty cycles; not drop-in compatible due to footprint mismatch. | Choose SMBJ7.5CHE3/5A when system-level surge testing exceeds 400 W single-pulse limits or sustained transient repetition demands enhanced thermal derating. |
Compared with SMAJ7.5CHE3/5A, the uni-directional SMAJ7.5AHE3/5A offers tighter clamping but adds polarity sensitivity, while the SMBJ7.5CHE3/5A increases surge margin at the cost of board space - making SMAJ7.5CHE3/5A the optimal balance of compactness, symmetry, and automotive-grade ruggedness for space-constrained bi-directional protection.
Availability
SMAJ7.5CHE3/5A is available at Aetrix Electronics and suitable for automotive powertrain control units, industrial PLC analog input modules, and automotive body electronics requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SMAJ7.5CHE3/5A 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and quality systems certified to IATF 16949 for automotive components.
The SMAJ series is engineered specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 qualification, stable clamping performance across temperature, and compatibility with automated SMT assembly processes.
FAQ
What is the clamping voltage of SMAJ7.5CHE3/5A at its rated peak pulse current?
The SMAJ7.5CHE3/5A has a maximum clamping voltage (VC) of 14.3 V at 28.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (–55 °C to +150 °C) and reflects the actual voltage imposed on protected circuitry during worst-case surge events - a key parameter for ensuring downstream ICs remain within absolute maximum ratings. The SMAJ7.5CHE3/5A achieves this with a low clamping ratio of 1.91 (VC/VWM), confirming effective transient suppression.
Is SMAJ7.5CHE3/5A suitable for automotive applications?
Yes, SMAJ7.5CHE3/5A is explicitly qualified to AEC-Q101 standards and designated as high-reliability/automotive grade (HE3 suffix). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and surge endurance - validating its use in engine control units, body control modules, and ADAS sensor interfaces. The device's DO-214AC package, matte tin plating, and MSL Level 1 rating further ensure robustness in automotive manufacturing and field operation. SMAJ7.5CHE3/5A is not a commercial-grade part; its qualification data is documented in Vishay's official AEC-Q101 report for the SMAJ family.
How does SMAJ7.5CHE3/5A differ from SMAJ7.5AHE3/5A?
SMAJ7.5CHE3/5A is bi-directional with no polarity marking, while SMAJ7.5AHE3/5A is uni-directional and features a cathode band. Their key electrical differences include clamping voltage (14.3 V vs. 12.9 V at respective IPPM) and peak pulse current (28.0 A vs. 31.0 A). Both share identical VWM (7.5 V), AEC-Q101 qualification, and DO-214AC packaging. The SMAJ7.5CHE3/5A provides layout flexibility and symmetric protection for AC-coupled or floating lines, whereas SMAJ7.5AHE3/5A delivers lower clamping on DC-biased rails where polarity is fixed - making SMAJ7.5CHE3/5A the preferred choice for sensor signal lines and bidirectional buses.
What is the maximum reverse leakage current for SMAJ7.5CHE3/5A at its stand-off voltage?
The maximum reverse leakage current (ID) for SMAJ7.5CHE3/5A is 1.0 µA at the stand-off voltage (VWM) of 7.5 V and ambient temperature of 25 °C. This ultra-low leakage ensures minimal DC loading on protected circuits - critical for precision analog paths, battery-powered sensors, and high-impedance interfaces where even nanoamp-level currents could induce offset errors or accelerate battery drain. The specification remains valid across the full –55 °C to +150 °C operating junction temperature range per Vishay's published characterization data.
Does SMAJ7.5CHE3/5A require special PCB layout considerations?
Yes - to achieve its rated 400 W peak pulse power, SMAJ7.5CHE3/5A must be mounted on minimum recommended copper pad areas of 0.2 × 0.2" (5.0 × 5.0 mm) per terminal, as specified in Vishay Document 88390. Smaller pads reduce thermal dissipation and cause premature thermal runaway during surge events, degrading clamping performance and potentially failing open. Additionally, routing should minimize trace inductance between the TVS and protected node - short, wide traces directly adjacent to the connector or IC pin are essential. The SMAJ7.5CHE3/5A's DO-214AC footprint is standardized, but thermal relief and ground plane connectivity directly impact real-world surge survivability.
SMAJ7.5CHE3/5A 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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)
SMAJ7.5CHE3/5A FAQ
1.How can I place an order for SMAJ7.5CHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5CHE3/5A 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 SMAJ7.5CHE3/5A reliable?
The price and inventory of SMAJ7.5CHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.5CHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ7.5CHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5CHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5CHE3/5A?
SMAJ7.5CHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5CHE3/5A 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 SMAJ7.5CHE3/5A?
For technical support, including SMAJ7.5CHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5CHE3/5A requirements.
6.How does Aetrix verify that SMAJ7.5CHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5CHE3/5A 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 SMAJ7.5CHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ7.5CHE3/5A?
All SMAJ7.5CHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5CHE3/5A, 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 SMAJ7.5CHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ7.5CHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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