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Vishay General Semiconductor - Diodes Division SMAJ13AHM3/H
- Part No.:
- SMAJ13AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13AHM3/H.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,222
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Product details
Overview
SMAJ13AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 13 V standoff voltage (VWM), 14.4–15.9 V breakdown voltage (VBR) at 1 mA, and clamps transients to ≤21.5 V at 18.6 A peak pulse current (IPPM) under 10/1000 μs waveform - ideal for safeguarding power rails and signal lines in automotive ECUs and industrial I/O modules.
For engineers reviewing the SMAJ13AHM3/H datasheet, SMAJ13AHM3/H pinout, SMAJ13AHM3/H application, or SMAJ13AHM3/H equivalent, this device delivers verified AEC-Q101 qualification, 400 W peak pulse power (≤78 V), low incremental surge resistance, and halogen-free RoHS-compliant construction - key selection criteria for automotive-grade transient suppression in space-constrained surface-mount designs.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping protector with fast response time (<1 ps) and low clamping ratio (VC/VBR ≈ 1.45). Its glass-passivated junction ensures stable breakdown characteristics and high reliability under repetitive surge stress.
The device is rated for -55 °C to +150 °C operating junction temperature, exhibits 0.084 %/°C temperature coefficient of VBR, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak - confirming suitability for automated SMT assembly in high-reliability environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 13 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (Breakdown Voltage) | 14.4–15.9 V at 1 mA - precise voltage threshold where avalanche conduction initiates; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | ≤21.5 V at 18.6 A (10/1000 μs) - limits downstream voltage stress on protected ICs; enables compatibility with 24 V tolerant interfaces. |
| PPPM (Peak Pulse Power) | 400 W - energy-handling capacity for standard lightning/surge immunity tests (IEC 61000-4-5); derates to 300 W above 78 V. |
| IPPM (Peak Pulse Current) | 18.6 A - maximum non-repetitive surge current it can shunt without failure; validated with 0.2" × 0.2" copper pads. |
| TJmax | +150 °C - maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 2.54 mm lead pitch; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by band on one end. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for full power rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference | Enables unidirectional clamping from cathode to anode; must be tied to lowest potential node in protected circuit. |
| Cathode | Marked terminal (band); reverse-biased connection to protected line | Connected to the line requiring overvoltage protection (e.g., 12 V rail, CAN-H); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors - supports PPAP and long-term reliability requirements. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and enables use in green manufacturing without compromising surge performance or thermal stability. |
| 400 W peak pulse power (10/1000 μs) | Provides sufficient energy absorption for ISO 7637-2 Pulse 1/2a/2b and IEC 61000-4-5 Level 3 surges in 12 V systems. |
| Low clamping voltage (21.5 V @ 18.6 A) | Minimizes voltage overshoot across protected components - critical for safeguarding 24 V-rated microcontrollers and transceivers. |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and allows single-pass reflow without baking - reduces production cost and cycle time. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and regulator input to clamp spikes up to 40 V. Use Value: Prevents damage to LDOs and MCU power pins during ISO 16750-2 load dump events; maintains system uptime in harsh vehicle environments. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS mounted at connector interface to divert fast transients before reaching ADC front-end or op-amp buffers. Use Value: Ensures signal integrity and measurement accuracy in factory automation sensors exposed to frequent human handling and field wiring. |
| Telecom DC Power Input Protection | Consumer USB Power Delivery Line Protection |
|
Use Scenario: Safeguarding 24/48 V DC inputs of telecom base station power supplies from induced lightning surges. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converters and hot-swap controllers. Use Value: Absorbs 400 W surges per IEC 61000-4-5, enabling compliance with EN 61000-4-5 Level 3 without additional series impedance. |
Use Scenario: Adding secondary overvoltage protection on VBUS lines of USB-C PD adapters and docking stations. IC Role / Device Role / Timing Role: Fast-response TVS placed after primary fuse and before USB PD controller to catch residual transients. Use Value: Limits VBUS overshoot to <24 V during 100 V/1 μs EFT bursts, preventing latch-up or damage to USB PD PHY and port controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13AHE3/H | Same electrical specs but RoHS-compliant (not halogen-free); uses standard tin plating without halogen-free molding compound. | Approved for commercial/industrial use; not certified for halogen-free supply chains or certain automotive OEM tier-1 requirements. | Select SMAJ13AHE3/H if halogen-free compliance is not mandated and cost optimization is prioritized. |
| SMAJ13A-E3/61 | Identical VWM, VBR, VC, and PPPM; differs only in packaging (7" reel, 1800 pcs) and material grade (commercial RoHS). | Not AEC-Q101 qualified; intended for non-automotive applications where qualification documentation is not required. | Choose SMAJ13A-E3/61 for consumer or computing applications where automotive qualification adds unnecessary cost and overhead. |
Compared with SMAJ13AHM3/H, SMAJ13AHE3/H offers identical surge performance but lacks halogen-free certification, while SMAJ13A-E3/61 omits AEC-Q101 qualification entirely - making SMAJ13AHM3/H the sole option meeting both halogen-free and automotive-grade requirements in the SMAJ13A family.
Availability
SMAJ13AHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMAJ13AHM3/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 engineered for high-energy transient suppression in automotive, industrial, and communications systems - delivering standardized TVS protection with AEC-Q101 qualification and tight parametric control across voltage grades.
FAQ
What is the clamping voltage of SMAJ13AHM3/H at its rated peak pulse current?
The SMAJ13AHM3/H has a maximum clamping voltage (VC) of 21.5 V at 18.6 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads per terminal, ensuring accurate thermal dissipation during surge events. The clamping performance directly protects downstream 24 V-tolerant ICs in automotive and industrial applications.
Is SMAJ13AHM3/H qualified for automotive applications?
Yes, SMAJ13AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88390. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and surge endurance - validating its use in engine control units, body control modules, and ADAS sensors where reliability under harsh conditions is mandatory.
What does the "HM3" suffix indicate in SMAJ13AHM3/H?
The "HM3" suffix in SMAJ13AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It specifies that the device uses halogen-free molding compound and matte tin-plated leads meeting JESD 201 Class 2 whisker resistance - fulfilling strict environmental and reliability requirements for Tier-1 automotive suppliers and green manufacturing initiatives.
How does SMAJ13AHM3/H differ from SMAJ13A-E3/61?
SMAJ13AHM3/H and SMAJ13A-E3/61 share identical electrical parameters (VWM = 13 V, VBR = 14.4–15.9 V, VC = 21.5 V), but SMAJ13AHM3/H is halogen-free and AEC-Q101 qualified, whereas SMAJ13A-E3/61 is commercial-grade RoHS only. The latter lacks automotive qualification and halogen-free certification, limiting its use to non-automotive applications like consumer electronics or general industrial controls.
What is the thermal resistance of SMAJ13AHM3/H from junction to ambient?
The typical thermal resistance from junction to ambient (RθJA) for SMAJ13AHM3/H is 120 °C/W, measured under standard JEDEC test conditions (single device on FR-4 board with minimum recommended pad layout). This value informs thermal design margins when estimating junction temperature rise during sustained power dissipation or repeated surge events in compact PCB layouts.
SMAJ13AHM3/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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ13AHM3/H FAQ
1.How can I place an order for SMAJ13AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13AHM3/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 SMAJ13AHM3/H reliable?
The price and inventory of SMAJ13AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13AHM3/H is usually 5 days.
3.What payment methods are accepted for SMAJ13AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13AHM3/H?
SMAJ13AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13AHM3/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 SMAJ13AHM3/H?
For technical support, including SMAJ13AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13AHM3/H requirements.
6.How does Aetrix verify that SMAJ13AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMAJ13AHM3/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 SMAJ13AHM3/H meets industry standards.
7.What is the process for return or replacement of SMAJ13AHM3/H?
All SMAJ13AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13AHM3/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 SMAJ13AHM3/H part is unused and in its original packaging.
Return procedure for SMAJ13AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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