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Vishay General Semiconductor - Diodes Division SMAJ13AHM3/I
- Part No.:
- SMAJ13AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13AHM3/I.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,748
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Product details
Overview
SMAJ13AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast-rising voltage transients on power and signal lines. It features a 13 V stand-off voltage (VWM), 14.4–15.9 V breakdown voltage (VBR) at 1 mA, 21.5 V maximum clamping voltage (VC) at 18.6 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.
For engineers reviewing the SMAJ13AHM3/I datasheet, SMAJ13AHM3/I pinout, SMAJ13AHM3/I application, or SMAJ13AHM3/I equivalent, this device delivers AEC-Q101 qualified surge protection with halogen-free RoHS compliance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level ESD and load-switching transient suppression in space-constrained designs.
Technical Context
The SMAJ13AHM3/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold, thereby shunting transient energy to ground. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at VWM), while its low Rsurge enables effective clamping under high-current surges up to 18.6 A.
Designed for automated SMT assembly, it uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability requirements. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC working margin. |
| VBR (min/max) | 14.4 V / 15.9 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 21.5 V at 18.6 A - Clamped voltage during 10/1000 µs surge; limits stress on downstream ICs. |
| PPPM | 400 W - Peak pulse power handling capability; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| IFSM | 40 A - Non-repetitive forward surge current rating; supports robust inrush and fault-current resilience. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-temperature industrial environments. |
| Package | SMA (DO-214AC) - Standardized 2-pin surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal footprint. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices. Dimensions: 4.93 mm × 2.92 mm × 2.29 mm (L × W × H); MSL Level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected line (e.g., 12 V rail); conducts during reverse overvoltage events. |
| Cathode | Clamping reference / ground connection | Connected to system ground or low-impedance return; establishes clamping reference for VC. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics - no additional qualification required. |
| Halogen-free & RoHS-compliant | HM3 suffix denotes halogen-free molding compound and lead finish - meets global environmental compliance mandates. |
| 400 W peak pulse power | Handles repetitive 10/1000 µs transients at 0.01% duty cycle - suitable for CAN bus, LIN, and 12 V power rail protection. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during clamping - preserves margin for 3.3 V/5 V logic and analog front-ends. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH - eliminates bake requirements prior to reflow soldering. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppresses load-dump and jump-start transients on 12 V battery-fed ECUs and lighting modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp spikes above 13 V. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤21.5 V during 100 V/50 ms load dump events. | Use Scenario: Shields analog output lines of pressure/temperature sensors from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across signal and ground to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Prevents latch-up or damage to ADC inputs while maintaining signal integrity due to fast <1 ps response time. |
| Consumer Power Adapter Input Protection | Telecom DC Power Feed Protection |
Use Scenario: Guards AC/DC adapter secondary-side outputs against surge coupling from primary-side transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on 5 V/12 V output rails to absorb 400 W surges without degradation. Use Value: Extends adapter lifetime by preventing cumulative degradation of output capacitors and regulators during repeated surges. | Use Scenario: Protects PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input before DC-DC converter to limit surge energy entering system. Use Value: Enables compliance with IEC 61000-4-5 (10/700 µs, 2 kV) by clamping to 21.5 V before downstream circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13AHE3/I | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3). | Acceptable for commercial/industrial use where halogen-free requirement is waived. | Select when AEC-Q101 is not required and cost optimization is prioritized. |
| SMAJ13A-M3/5A | Same electrical specs; halogen-free RoHS-compliant, but packaged in 13" reel (5A) vs 7" reel (I). | Preferred for high-volume SMT production requiring larger reels and tape-and-reel logistics. | Select when procurement volume exceeds 7,500 units per order and reel size impacts line efficiency. |
Compared with SMAJ13AHE3/I and SMAJ13A-M3/5A, the SMAJ13AHM3/I uniquely combines AEC-Q101 qualification, halogen-free construction, and 7" tape-and-reel packaging - making it optimal for automotive Tier-1 suppliers needing full compliance traceability and small-batch flexibility.
Availability
SMAJ13AHM3/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom DC power feed applications requiring stable component supply, long-term lifecycle support, and AEC-Q101 validated reliability.
Supply support for SMAJ13AHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, automotive-grade, and industry-standard solutions.
The SMAJ series is engineered specifically for board-level transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ISO 7637-2 and IEC 61000-4-5 threats is mandatory.
FAQ
What is the clamping voltage of the SMAJ13AHM3/I under a 10/1000 µs surge?
The SMAJ13AHM3/I has a maximum clamping voltage (VC) of 21.5 V at 18.6 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C) and defines the upper voltage limit imposed on protected circuits during transient events - critical for ensuring compatibility with 24 V tolerant or 3.3 V/5 V logic interfaces downstream of the SMAJ13AHM3/I.
Is the SMAJ13AHM3/I suitable for automotive applications?
Yes, the SMAJ13AHM3/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3_X" (where "X" denotes revision). It meets automotive reliability requirements including temperature cycling, humidity testing, and surge endurance - making SMAJ13AHM3/I appropriate for under-hood and cabin electronics such as body control modules, infotainment power supplies, and ADAS sensor interfaces.
What does the "HM3" suffix mean in SMAJ13AHM3/I?
The "HM3" suffix in SMAJ13AHM3/I indicates halogen-free, RoHS-compliant construction with matte tin-plated leads, per Vishay's ordering nomenclature. It also signals AEC-Q101 qualification when paired with revision code "I" (e.g., HM3_A/I). This distinguishes SMAJ13AHM3/I from non-automotive variants like E3 or M3, confirming its suitability for regulated automotive supply chains requiring full material compliance documentation.
How does the SMAJ13AHM3/I compare to bidirectional TVS diodes like SMAJ13CA?
The SMAJ13AHM3/I is unidirectional and intended for DC power line protection where polarity is fixed, offering lower leakage and higher surge current capability than its bidirectional counterpart SMAJ13CA. Unlike SMAJ13CA, SMAJ13AHM3/I cannot suppress transients on AC or floating signal lines - its cathode band must be correctly oriented toward ground, and it provides no protection during positive-going transients on the anode side.
What is the thermal resistance of the SMAJ13AHM3/I, and how does it affect PCB layout?
The SMAJ13AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To maintain safe operation under sustained surge conditions, PCB layout must use minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - as specified in Vishay's datasheet - otherwise thermal derating will reduce the effective PPPM rating below 400 W for the SMAJ13AHM3/I.
SMAJ13AHM3/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:
- 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/I FAQ
1.How can I place an order for SMAJ13AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13AHM3/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 SMAJ13AHM3/I reliable?
The price and inventory of SMAJ13AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13AHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ13AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13AHM3/I?
SMAJ13AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13AHM3/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 SMAJ13AHM3/I?
For technical support, including SMAJ13AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13AHM3/I requirements.
6.How does Aetrix verify that SMAJ13AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ13AHM3/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 SMAJ13AHM3/I meets industry standards.
7.What is the process for return or replacement of SMAJ13AHM3/I?
All SMAJ13AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13AHM3/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 SMAJ13AHM3/I part is unused and in its original packaging.
Return procedure for SMAJ13AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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