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Vishay General Semiconductor - Diodes Division SMAJ13AHM3_A/I
- Part No.:
- SMAJ13AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13AHM3_A/I.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,910
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Product details
Overview
SMAJ13AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast 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_A/I datasheet, SMAJ13AHM3_A/I pinout, SMAJ13AHM3_A/I application, or SMAJ13AHM3_A/I equivalent, this part 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
This unidirectional TVS diode operates as a voltage-clamping device across DC power rails or low-speed signal paths, activating when reverse voltage exceeds its VWM of 13 V and clamping to ≤21.5 V at 18.6 A. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package supports automated placement and meets UL 94 V-0 flammability rating.
The device is rated for 40 A non-repetitive forward surge current (IFSM), has a thermal resistance of 120 °C/W (junction-to-ambient), and operates across –55 °C to +150 °C junction temperature range. It is specifically qualified to AEC-Q101 for automotive applications and marked with cathode band polarity per JEDEC DO-214AC standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 13 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 14.4–15.9 V at 1 mA - Confirmed minimum/maximum reverse breakdown threshold; ensures predictable turn-on under transients. |
| VC (Clamping Voltage) | 21.5 V at 18.6 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability without failure; derates to 300 W above 78 V. |
| IPPM (Peak Pulse Current) | 18.6 A - Maximum surge current the device safely diverts; derived from VC and PPPM (P = V × I). |
| TJmax | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with standard reflow profiles and J-STD-020 MSL Level 1. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by a single band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line (e.g., ground or return path); defines conduction direction in unidirectional mode. |
| Cathode | Clamping node / Surge current sink | Connected to higher-potential side (e.g., VIN, signal line); conducts transient current to ground when VREV > VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance - required for engine control, ADAS, and infotainment power rails. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations without compromising thermal or electrical performance; supports lead-free reflow assembly. |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients from inductive switching (e.g., solenoids, relays) without degradation - verified per IEC 61000-4-5. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream ICs; enables tighter design margins versus competitive TVS devices with higher ratios. |
| MSL Level 1 (J-STD-020) | Zero floor life limitation; allows indefinite dry pack storage and direct placement without baking - reduces manufacturing overhead. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional clamping device placed between battery rail and LDO/regulator input. Use Value: Limits voltage to ≤21.5 V during 35 V/100 ms load-dump events, preventing damage to 3.3 V/5 V logic and CAN transceivers. |
Use Scenario: Protecting analog outputs and digital I/O of pressure/temperature sensors exposed to ESD and cable discharge. IC Role / Device Role / Timing Role: Low-capacitance transient shunt on sensor supply and signal lines (e.g., 4–20 mA, LIN bus). Use Value: Clamps ±8 kV contact ESD (IEC 61000-4-2) within <1 ns, preserving signal integrity and avoiding latch-up in precision ADC front-ends. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeds |
|
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters powering USB-C PD and smart home hubs. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 5–20 V output rails upstream of USB port controllers. Use Value: Absorbs 400 W surges from capacitor discharge or regulator fault, maintaining output regulation and preventing USB port reset. |
Use Scenario: Surge suppression on -48 V DC telecom power feeds entering base station backplanes and remote radio units. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, protecting PMICs and FPGA configuration circuits. Use Value: Withstands repeated 10/1000 μs surges up to 18.6 A while maintaining VC ≤21.5 V - ensuring uptime in lightning-prone outdoor deployments. |
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_A/I | Same electrical specs (VWM = 13 V, VC = 21.5 V), but RoHS-compliant commercial grade without halogen-free certification. | Lacks halogen-free material declaration; not suitable for strict environmental compliance programs (e.g., EU automotive Tier 1). | Select when halogen-free requirement is absent and cost optimization is prioritized over material traceability. |
| SMAJ13A-M3/5A | Identical electrical and thermal specs; differs only in packaging format (13" reel, 7500 pcs) and base P/N suffix convention. | No functional or application difference - same device, alternate ordering code for volume tape-and-reel fulfillment. | Choose for high-volume production where reel size and quantity align with SMT line feed requirements. |
Compared with SMAJ13AHM3_A/I, the HE3 variant trades halogen-free assurance for broader commercial availability, while the M3/5A variant offers identical performance in a different logistics configuration - enabling flexibility in compliance-driven or high-throughput manufacturing contexts.
Availability
SMAJ13AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power interface designs requiring stable component supply, AEC-Q101 validation, and halogen-free material compliance.
Supply support for SMAJ13AHM3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where surge immunity, long-term stability, and regulatory compliance are mandatory.
FAQ
What is the clamping voltage of SMAJ13AHM3_A/I at its rated peak pulse current?
The SMAJ13AHM3_A/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 under standardized test conditions per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ13AHM3_A/I maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMAJ13AHM3_A/I suitable for automotive applications?
Yes, SMAJ13AHM3_A/I is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix (halogen-free, RoHS-compliant, AEC-Q101). It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and surge endurance - making it appropriate for engine control units, body electronics, and ADAS power domains. The SMAJ13AHM3_A/I meets all requirements for under-hood and cabin-mounted systems.
How does the SMAJ13AHM3_A/I differ from bidirectional TVS diodes like SMAJ13CA?
The SMAJ13AHM3_A/I is unidirectional and functions only in reverse-bias clamping mode, with polarity marked by a cathode band. In contrast, SMAJ13CA is bidirectional and clamps symmetrically in both directions - suitable for AC lines or differential signals. The SMAJ13AHM3_A/I offers lower leakage at VWM (1.0 μA vs. 1.0 μA for CA), but cannot replace SMAJ13CA in floating or AC-coupled applications without circuit redesign.
What is the thermal resistance of SMAJ13AHM3_A/I, and how does it affect PCB layout?
The SMAJ13AHM3_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. To maintain safe junction temperatures under repetitive surge conditions, designers must provide adequate copper area and avoid excessive trace length. The SMAJ13AHM3_A/I's RθJL of 30 °C/W indicates efficient heat transfer to PCB leads, supporting reliable operation at 3.3 W steady-state dissipation.
Does SMAJ13AHM3_A/I require special handling or baking before reflow soldering?
No - SMAJ13AHM3_A/I is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and may be placed directly onto PCBs without pre-baking. Its moisture sensitivity level reflects robust molding compound integrity and compatibility with standard lead-free reflow profiles (peak 260 °C). This eliminates process steps and reduces risk of popcorning during assembly - a key advantage of the SMAJ13AHM3_A/I in high-yield manufacturing.
SMAJ13AHM3_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):
- 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_A/I FAQ
1.How can I place an order for SMAJ13AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13AHM3_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 SMAJ13AHM3_A/I reliable?
The price and inventory of SMAJ13AHM3_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 SMAJ13AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ13AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13AHM3_A/I?
SMAJ13AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13AHM3_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 SMAJ13AHM3_A/I?
For technical support, including SMAJ13AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13AHM3_A/I requirements.
6.How does Aetrix verify that SMAJ13AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ13AHM3_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 SMAJ13AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ13AHM3_A/I?
All SMAJ13AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13AHM3_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 SMAJ13AHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ13AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ13AHM3_A/I Tags
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