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Vishay General Semiconductor - Diodes Division SMAJ5.0AHE3_A/I
- Part No.:
- SMAJ5.0AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0AHE3_A/I.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,207
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Product details
Overview
SMAJ5.0AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for primary overvoltage protection of 5.0 V DC power rails and signal lines. It delivers 400 W peak pulse power (10/1000 μs), clamps transients to ≤9.2 V at 43.5 A, and features 6.40–7.07 V breakdown voltage at 10 mA test current. Used in automotive ECUs, industrial sensor interfaces, and USB power input stages.
For engineers reviewing the SMAJ5.0AHE3_A/I datasheet, SMAJ5.0AHE3_A/I pinout, SMAJ5.0AHE3_A/I application, or SMAJ5.0AHE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, 800 μA max reverse leakage at 5.0 V stand-off, 150 °C max junction temperature, and compatibility with automated SMT placement on standard PCB pads.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging an avalanche breakdown mechanism to limit transient overvoltages before they damage downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under repetitive 10/1000 μs surges at 0.01% duty cycle.
The SMAJ5.0AHE3_A/I is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine), supports -55 °C to +150 °C operating range, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. Polarity is marked by cathode band; no marking for bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 5.0 V - Maximum continuous reverse voltage before significant leakage; defines protected rail voltage rating. |
| Breakdown Voltage (VBR) | 6.40–7.07 V at 10 mA - Avalanche onset range; ensures reliable conduction during overvoltage events. |
| Clamping Voltage (VC) | 9.2 V at 43.5 A IPPM - Peak voltage seen by protected circuit during 400 W transient; critical for IC survivability. |
| Peak Pulse Power (PPPM) | 400 W (10/1000 μs) - Surge energy handling capacity; derates above 25 °C per Fig. 2. |
| Reverse Leakage (ID) | 800 μA max at VWM - Low quiescent loss; avoids excessive power draw in standby or low-power modes. |
| Junction Temperature (TJ) | -55 °C to +150 °C - Enables operation in under-hood automotive and industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with IPC-7351B standard; 0.208" × 0.157" body size. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection | Connected to ground or return path; completes clamping loop when cathode is tied to protected line. |
| Cathode | Protected line connection | Connected to 5.0 V rail or signal line; conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 surge waveforms without degradation; supports 300 W rating above 78 V. |
| Fast response time | <1.0 ps typical - Limits voltage overshoot before clamping engages; protects nanosecond-scale logic inputs. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt; maintains tight clamping margin across full IPPM range. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing at 260 °C peak; eliminates bake requirements. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 5 V supply to microcontroller-based ECU modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 5 V rail and chassis ground to clamp transients below MCU absolute maximum ratings. Use Value: Prevents latch-up or permanent damage during ISO 7637-2 Pulse 5a (load dump) events up to 60 V/100 ms. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA transmitter) from ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: TVS connected across signal and return lines to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity with <1 nA leakage at 5 V, avoiding offset errors in precision current loops. |
| USB Type-C Power Input | Consumer Appliance Control Board |
Use Scenario: Safeguarding VBUS line in USB PD sink applications against hot-plug transients and cable-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on 5 V input path upstream of buck converter and USB controller. Use Value: Clamps to 9.2 V within nanoseconds, ensuring downstream USB PHY and PMIC remain within 6.0 V absolute max rating. | Use Scenario: Overvoltage suppression on 5 V logic rail powering touch panel controllers and LED drivers in smart home hubs. IC Role / Device Role / Timing Role: Standoff-rated TVS placed at board edge connector to intercept external surge coupling. Use Value: Withstands 40 A surge (8.3 ms) from nearby relay coil de-energization without failure or parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A-E3/61 | Same electrical specs; RoHS-compliant commercial grade, not AEC-Q101 qualified. | Lacks automotive qualification; unsuitable for under-hood or safety-critical modules. | Select SMAJ5.0AHE3_A/I for AEC-Q101 compliance; choose SMAJ5.0A-E3/61 only for cost-sensitive consumer designs. |
| P6SMB5.0A | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package; 600 W PPPM rating. | Higher thermal mass allows higher surge repetition rate; requires larger PCB area. | Use P6SMB5.0A where layout space permits and higher surge endurance is needed; SMAJ5.0AHE3_A/I preferred for space-constrained SMT layouts. |
Compared with SMAJ5.0A-E3/61, the SMAJ5.0AHE3_A/I adds automotive qualification without sacrificing clamping performance; versus P6SMB5.0A, it trades 200 W peak power for 30% smaller footprint and identical 5.0 V system-level protection capability.
Availability
SMAJ5.0AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and USB power interface designs requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ5.0AHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMAJ series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and repeatable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of the SMAJ5.0AHE3_A/I under a 400 W transient?
The SMAJ5.0AHE3_A/I clamps to a maximum of 9.2 V at 43.5 A peak pulse current (IPPM), corresponding to the 400 W 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88390 and guarantees protection for 5 V logic circuits with headroom below their 6.0 V absolute maximum rating. The SMAJ5.0AHE3_A/I maintains this clamping performance across its full operating temperature range.
Is the SMAJ5.0AHE3_A/I suitable for automotive applications?
Yes, the SMAJ5.0AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88390. It is rated for -55 °C to +150 °C operation, passes MSL Level 1 reflow, and meets automotive surge immunity requirements including ISO 7637-2. The SMAJ5.0AHE3_A/I is approved for use in engine control units, body control modules, and ADAS sensor interfaces.
How does the SMAJ5.0AHE3_A/I differ from the bidirectional SMAJ5.0CA variant?
The SMAJ5.0AHE3_A/I is unidirectional with cathode marking and conducts only in reverse bias, while SMAJ5.0CA is bidirectional and symmetrical-clamping in both polarities. SMAJ5.0AHE3_A/I has lower reverse leakage (800 μA vs. 1.6 mA for SMAJ5.0CA at VWM) and is used where polarity is known and ground-referenced protection is required. SMAJ5.0AHE3_A/I cannot replace SMAJ5.0CA in AC-coupled or floating signal line applications.
What is the thermal resistance of the SMAJ5.0AHE3_A/I in standard mounting conditions?
The SMAJ5.0AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Thermal Characteristics table of datasheet 88390. Its junction-to-lead resistance (RθJL) is 30 °C/W, supporting effective heat transfer to PCB copper. Derating curves in Figure 2 apply above TA = 25 °C.
Does the SMAJ5.0AHE3_A/I require special PCB layout considerations?
Yes-the SMAJ5.0AHE3_A/I requires minimum recommended pad layout per Vishay's DO-214AC outline drawing: 0.074" (1.88 mm) pad width, 0.208" (5.28 mm) pad length, and 0.066" (1.68 mm) spacing. Short, wide traces to ground reduce inductance and preserve clamping speed. Avoid thermal relief on cathode/anode pads to maximize surge current handling. The SMAJ5.0AHE3_A/I must be placed as close as possible to the protected port.
SMAJ5.0AHE3_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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- 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)
SMAJ5.0AHE3_A/I FAQ
1.How can I place an order for SMAJ5.0AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0AHE3_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 SMAJ5.0AHE3_A/I reliable?
The price and inventory of SMAJ5.0AHE3_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 SMAJ5.0AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ5.0AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0AHE3_A/I?
SMAJ5.0AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0AHE3_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 SMAJ5.0AHE3_A/I?
For technical support, including SMAJ5.0AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0AHE3_A/I requirements.
6.How does Aetrix verify that SMAJ5.0AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0AHE3_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 SMAJ5.0AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ5.0AHE3_A/I?
All SMAJ5.0AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0AHE3_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 SMAJ5.0AHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ5.0AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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