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Vishay General Semiconductor - Diodes Division SMAJ7.5CHE3/61
- Part No.:
- SMAJ7.5CHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5CHE3/61.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ7.5CHE3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection of signal and power lines. It features a 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 rating with 10/1000 µs waveform - suitable for automotive-grade ESD and surge protection in sensor interfaces and power supply rails.
For engineers reviewing the SMAJ7.5CHE3/61 datasheet, SMAJ7.5CHE3/61 pinout, SMAJ7.5CHE3/61 application, or SMAJ7.5CHE3/61 equivalent, key selection criteria include its AEC-Q101 qualification, bi-directional symmetry, low clamping ratio (VC/VWM = 1.91), 1.0 µA max reverse leakage at VWM, and compatibility with automated SMT assembly on standard 0.2" × 0.2" copper pads.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified between 8.33 V (min) and 10.2 V (max) at 1.0 mA test current. Its clamping behavior is characterized by low incremental surge resistance, enabling rapid voltage limiting during transients induced by inductive switching or lightning surges.
The device is rated for 150 °C maximum junction temperature, exhibits 120 °C/W typical junction-to-ambient thermal resistance, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102 solderability standards, and the HE3 suffix confirms AEC-Q101 qualification for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin for protected circuitry. |
| VC @ IPPM | 14.3 V - Clamped voltage across device at 28.0 A peak pulse current; determines worst-case overvoltage seen by downstream components. |
| IPPM | 28.0 A - Peak surge current capability with 10/1000 µs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity. |
| PPPM | 400 W - Peak pulse power dissipation; enables handling of high-energy transients without thermal runaway under defined mounting conditions. |
| VBR min/max | 8.33 V / 10.2 V - Breakdown voltage range at 1.0 mA; ensures consistent turn-on threshold across production lots and temperature. |
| ID @ VWM | 1.0 µA - Maximum reverse leakage at stand-off voltage; minimizes standby power loss and avoids false triggering in high-impedance nodes. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking - symmetrical terminals suitable for AC-coupled or floating signal line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | Either terminal serves as anode or cathode depending on transient polarity; no DC bias dependency required. |
| Case (cathode band absent) | Non-polarized package body | DO-214AC molding provides mechanical stability and UL 94 V-0 flammability compliance; no polarity identification needed. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive reliability including temperature cycling, humidity testing, and surge endurance - required for engine control, ADAS, and infotainment systems. |
| 400 W peak pulse power | Supports repeated surge events up to 0.01% duty cycle without degradation when mounted on 0.2" × 0.2" copper pads - exceeds ISO 7637-2 Pulse 5a requirements. |
| Low clamping ratio (1.91) | VC/VWM = 14.3/7.5 enables tighter voltage margin for 5 V or 3.3 V logic protection without overdesigning downstream TVS stages. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (260 °C peak) without baking - simplifies manufacturing and reduces process risk. |
| Glass passivated junction | Ensures stable leakage performance and long-term reliability under thermal stress and humidity exposure - critical for 15-year automotive service life. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transceiver Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control modules from load dump and alternator ripple transients. IC Role / Device Role: Bi-directional clamping element placed directly at connector entry point to shunt surge energy before reaching precision ADC front-end. Use Value: Maintains signal integrity below 14.3 V clamping level while surviving >100,000 surge cycles per AEC-Q101 stress test protocol. |
Use Scenario: Safeguarding CANH/CANL lines in vehicle body control units against ESD (±8 kV contact) and fast transient bursts per ISO 10605. IC Role / Device Role: Low-capacitance (≈100 pF at 0 V) bi-directional TVS placed differential across bus pair to suppress common-mode surges without distorting bit timing. Use Value: Enables reliable CAN FD communication up to 5 Mbps by limiting voltage excursions to ≤14.3 V while adding <0.5 ns propagation delay. |
| Consumer USB Port ESD Protection | Power Supply Input Surge Suppression |
|
Use Scenario: Shielding USB 2.0 D+/D− lines in automotive infotainment head units from human-body-model (HBM) ESD events. IC Role / Device Role: First-line defense placed adjacent to USB connector, operating in bi-directional mode to handle ±15 kV air discharge per IEC 61000-4-2. Use Value: Delivers sub-100 ps response time and <1.0 µA leakage at 5.0 V nominal bus voltage - prevents false disconnects and data corruption. |
Use Scenario: Clamping 12 V rail inputs in telematics control units exposed to ISO 7637-2 Pulse 1 (−150 V/50 Ω) and Pulse 2a (+100 V/2 Ω). IC Role / Device Role: Parallel-connected TVS absorbing transient energy before it reaches DC/DC converter input stage and bulk capacitance. Use Value: Limits input voltage to ≤14.3 V during 100 ms pulses, preventing latch-up or overvoltage shutdown of downstream PMICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5AHE3/61 | Uni-directional variant with same VWM (7.5 V) but asymmetric conduction; cathode band marked; slightly lower VC (12.9 V) due to single-junction architecture. | Requires known DC bias polarity; unsuitable for AC or floating lines; preferred where unidirectional clamping and tighter VC are prioritized. | Select SMAJ7.5AHE3/61 only if circuit ground reference is fixed and polarity is guaranteed - otherwise SMAJ7.5CHE3/61 provides safer default protection. |
| SMBJ7.5CHE3/61 | Same bi-directional function and VWM, but in larger DO-214AA (SMB) package; higher IPPM (43.5 A) and PPPM (600 W); 150 °C TJ max retained. | Better thermal dissipation and surge margin; requires larger PCB footprint (0.265" × 0.165" vs. 0.208" × 0.157"); not drop-in compatible. | Choose SMBJ7.5CHE3/61 when system-level surge testing exceeds IEC 61000-4-5 Level 4; SMAJ7.5CHE3/61 remains optimal for space-constrained automotive modules. |
Compared with SMAJ7.5AHE3/61, SMAJ7.5CHE3/61 eliminates polarity dependency and simplifies layout for bidirectional signals, while SMBJ7.5CHE3/61 trades board area for higher surge robustness - making SMAJ7.5CHE3/61 the balanced choice for compact, polarity-agnostic automotive protection.
Availability
SMAJ7.5CHE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and consumer USB interface protection requiring stable component supply and AEC-Q101-compliant reliability.
Supply support for SMAJ7.5CHE3/61 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMAJ series is engineered specifically for automotive-grade transient suppression, combining AEC-Q101 qualification, low-clamp performance, and surface-mount scalability to meet stringent ISO 16750 and ISO 7637-2 requirements.
FAQ
What does the "HE3" suffix indicate in SMAJ7.5CHE3/61?
The HE3 suffix in SMAJ7.5CHE3/61 denotes high-reliability, automotive-grade qualification per AEC-Q101, RoHS compliance, and JESD201 Class 2 whisker resistance. It distinguishes this part from commercial-grade E3 variants and confirms suitability for under-hood and safety-critical vehicle systems - a key requirement verified in the Vishay document 88390 revision 29-Oct-08.
Is SMAJ7.5CHE3/61 uni-directional or bi-directional?
SMAJ7.5CHE3/61 is a bi-directional transient voltage suppressor, as confirmed by the "C" in its part number and absence of cathode band marking. Its electrical characteristics apply identically in both directions, enabling protection of AC-coupled, floating, or differential signal lines without polarity concerns - unlike uni-directional variants such as SMAJ7.5AHE3/61.
What is the maximum clamping voltage of SMAJ7.5CHE3/61 at rated surge current?
The maximum clamping voltage (VC) of SMAJ7.5CHE3/61 is 14.3 V at 28.0 A peak pulse current (IPPM) with a 10/1000 µs waveform, per Vishay's Electrical Characteristics table on page 2 of document 88390. This value defines the upper voltage limit imposed on protected circuits during standardized surge events.
Does SMAJ7.5CHE3/61 require special PCB layout considerations?
Yes - SMAJ7.5CHE3/61 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 400 W peak pulse power and thermal performance. Smaller pads reduce heat dissipation and cause premature failure under repetitive surges; the DO-214AC package also requires adequate clearance from adjacent components to avoid solder bridging during reflow.
How does SMAJ7.5CHE3/61 compare to SMAJ7.5AHE3/61 in terms of clamping performance?
SMAJ7.5CHE3/61 has a maximum clamping voltage of 14.3 V at 28.0 A, while SMAJ7.5AHE3/61 clamps at 12.9 V at 31.0 A - reflecting its uni-directional architecture. The bi-directional SMAJ7.5CHE3/61 trades 1.4 V higher clamping for polarity independence, making it more versatile in mixed-signal or floating applications where DC bias direction is undefined or variable.
SMAJ7.5CHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
SMAJ7.5CHE3/61 FAQ
1.How can I place an order for SMAJ7.5CHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5CHE3/61 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 SMAJ7.5CHE3/61 reliable?
The price and inventory of SMAJ7.5CHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.5CHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ7.5CHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5CHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5CHE3/61?
SMAJ7.5CHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5CHE3/61 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 SMAJ7.5CHE3/61?
For technical support, including SMAJ7.5CHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5CHE3/61 requirements.
6.How does Aetrix verify that SMAJ7.5CHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5CHE3/61 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 SMAJ7.5CHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ7.5CHE3/61?
All SMAJ7.5CHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5CHE3/61, 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 SMAJ7.5CHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ7.5CHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.5CHE3/61 Tags
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