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Vishay General Semiconductor - Diodes Division SMAJ13AHE3_A/H
- Part No.:
- SMAJ13AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13AHE3_A/H.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,706
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Product details
Overview
SMAJ13AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 13 V stand-off voltage (VWM), 14.4–15.9 V breakdown voltage (VBR) at 1 mA test current, and clamps up to 21.5 V at 18.6 A peak pulse current (IPPM) under 10/1000 μs waveform.
For engineers reviewing the SMAJ13AHE3_A/H datasheet, SMAJ13AHE3_A/H pinout, SMAJ13AHE3_A/H application, or SMAJ13AHE3_A/H equivalent, this device is selected for robust overvoltage protection on power rails and signal lines in automotive ECUs, industrial sensor interfaces, and telecom front-end circuits where AEC-Q101 qualification, low clamping voltage, and 400 W peak pulse power capability are critical.
Technical Context
This unidirectional TVS diode operates as a fast-acting shunt clamp, entering avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 μA at VWM), while the SMA package supports automated placement and meets MSL level 1 reflow requirements (peak 260 °C).
The device delivers 400 W peak pulse power (10/1000 μs) up to 78 V, derating to 300 W above that; thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), enabling reliable operation within -55 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 13 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 14.4–15.9 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 21.5 V at IPPM = 18.6 A - Peak voltage seen by protected circuit during worst-case surge; enables downstream IC survival. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - Sustains high-energy transients without failure; derates to 300 W above 78 V. |
| ID (Reverse Leakage) | ≤1.0 μA at VWM - Minimal standby power loss and signal integrity impact on protected lines. |
| TJ max. | +150 °C - Supports under-hood automotive and high-temperature industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, cathode-banded unidirectional configuration. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping current path. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy transients common in automotive load-dump and industrial motor-switching events. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot across protected ICs-critical for 12 V rail and 3.3 V/5 V logic interface protection. |
| AEC-Q101 qualified (HE3 suffix) | Meets automotive reliability standards for temperature cycling, humidity, and surge endurance-enables direct use in ECU designs. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage drift over time and temperature. |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load-dump spikes and relay coil flyback in BCMs. IC Role / Device Role / Timing Role: Unidirectional shunt clamp on 12 V supply rail and bidirectional signal lines (with CA variant). Use Value: Clamps transients to ≤21.5 V, preventing latch-up or gate oxide damage in 3.3 V MCU peripherals. |
Use Scenario: Safeguarding analog outputs (4–20 mA) and digital I/O of pressure/temperature sensors exposed to EMI in factory automation. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp on sensor output traces and power inputs. Use Value: Sub-20 ns response time limits voltage excursion duration, preserving ADC accuracy and isolator integrity. |
| Telecom Power Input Stage | Consumer USB-C Power Delivery Interface |
|
Use Scenario: Front-end protection on 48 V PoE injectors and PSE controllers against lightning-induced surges on Ethernet pairs. IC Role / Device Role / Timing Role: Primary TVS on DC input rail prior to DC/DC converter and hot-swap controller. Use Value: 400 W rating handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation. |
Use Scenario: Secondary-level surge suppression on VBUS lines in USB-C PD sink ports subject to accidental 20 V misconnection or ESD. IC Role / Device Role / Timing Role: Clamp diode placed after ESD array but before buck converter and port controller. Use Value: 13 V VWM aligns with USB PD 3.0 15 V profile; low VC prevents overvoltage shutdown of PD controller. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A-E3/61 | Commercial-grade (non-AEC-Q101), same electrical specs and SMA package. | Lacks automotive qualification; suitable for industrial/commercial designs without automotive lifecycle requirements. | Select when AEC-Q101 is not mandated and cost optimization is prioritized. |
| SMBJ13AHE3_A/H | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package; 600 W PPPM rating. | Higher power handling and thermal mass; requires larger PCB footprint and different pad layout. | Choose when higher surge margin (e.g., IEC 61000-4-5 Level 5) or improved thermal performance is required. |
Compared with SMAJ13AHE3_A/H, SMAJ13A-E3/61 offers identical protection performance without automotive qualification, while SMBJ13AHE3_A/H provides 50 % higher peak pulse power in a physically larger package-enabling longer surge endurance at the cost of board space.
Availability
SMAJ13AHE3_A/H is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and telecom power input stages requiring stable component supply, AEC-Q101 compliance, and repeatable surge protection performance.
Supply support for SMAJ13AHE3_A/H 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 application-specific performance.
The SMAJ series is part of Vishay's TRANSZORB® TVS platform, engineered for high-reliability transient suppression in automotive, industrial, and communications systems where fast response, low clamping, and qualification-grade consistency are essential.
FAQ
What is the clamping voltage of SMAJ13AHE3_A/H at its rated peak pulse current?
The SMAJ13AHE3_A/H has a maximum clamping voltage (VC) of 21.5 V when subjected to its peak pulse current (IPPM) of 18.6 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and ensures protected downstream components experience no more than 21.5 V during surge events. The SMAJ13AHE3_A/H datasheet specifies this parameter in Table 1 under ELECTRICAL CHARACTERISTICS.
Is SMAJ13AHE3_A/H qualified for automotive applications?
Yes, SMAJ13AHE3_A/H is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its ordering code and explicitly stated in the Vishay document 88390. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SMAJ13AHE3_A/H suitable for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS sensor interfaces.
What is the standoff voltage (VWM) and why does it matter for SMAJ13AHE3_A/H?
The standoff voltage (VWM) of SMAJ13AHE3_A/H is 13 V, representing the maximum continuous reverse voltage the device can block without exceeding 1.0 μA leakage current. This parameter defines the operating margin between normal system voltage and avalanche onset-ensuring no false triggering during nominal 12 V automotive or industrial supply operation. Selecting a VWM ≥13 V avoids unnecessary conduction while maintaining sufficient headroom for ripple and tolerance.
How does the SMA (DO-214AC) package of SMAJ13AHE3_A/H affect PCB layout?
The SMA (DO-214AC) package of SMAJ13AHE3_A/H measures 4.50 mm × 2.79 mm with a 2.54 mm lead pitch, requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for rated 400 W pulse power dissipation. Its low-profile design supports dense layouts, and the cathode band must be correctly oriented toward the protected line. The package is MSL Level 1, eliminating bake requirements before reflow.
Can SMAJ13AHE3_A/H be used in bidirectional configurations?
No, SMAJ13AHE3_A/H is unidirectional only, as indicated by the "A" (not "CA") suffix and presence of a cathode band. For bidirectional protection, Vishay offers the SMAJ13CAHE3_A/H variant, which lacks polarity marking and exhibits symmetrical breakdown in both directions. Using SMAJ13AHE3_A/H in reverse-biased signal paths would result in forward conduction and failure; always match device polarity to circuit topology.
SMAJ13AHE3_A/H 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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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)
SMAJ13AHE3_A/H FAQ
1.How can I place an order for SMAJ13AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13AHE3_A/H 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 SMAJ13AHE3_A/H reliable?
The price and inventory of SMAJ13AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ13AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13AHE3_A/H?
SMAJ13AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13AHE3_A/H 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 SMAJ13AHE3_A/H?
For technical support, including SMAJ13AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13AHE3_A/H requirements.
6.How does Aetrix verify that SMAJ13AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ13AHE3_A/H 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 SMAJ13AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ13AHE3_A/H?
All SMAJ13AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13AHE3_A/H, 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 SMAJ13AHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ13AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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