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Vishay General Semiconductor - Diodes Division SMAJ13CAHM3/H
- Part No.:
- SMAJ13CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13CAHM3/H.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,071
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Product details
Overview
SMAJ13CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 13 V stand-off voltage (VWM), 14.4–15.9 V breakdown voltage (VBR) at 1 mA, 400 W peak pulse power (10/1000 μs), and clamps to ≤21.5 V at 18.6 A peak surge current - used for protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial electronics.
For engineers reviewing the SMAJ13CAHM3/H datasheet, SMAJ13CAHM3/H pinout, SMAJ13CAHM3/H application, or SMAJ13CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT placement on PCBs requiring robust ESD and lightning surge protection.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports fast, repeatable clamping under repetitive transients.
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA = 120 °C/W) reflects standard SMA pad layout performance, and it delivers 400 W pulse power up to 78 V, derating to 300 W above that threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 14.4 V / 15.9 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events |
| VC @ IPPM | ≤21.5 V at 18.6 A - Clamped voltage level limiting stress on downstream components during 10/1000 μs surge |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak pulse power handling per standard waveform, defining transient energy absorption capacity |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms), supporting high-energy inductive switching events |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - Low-profile SMT package compatible with automated assembly and IPC-compliant reflow profiles |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, MSL Level 1 compliant (260 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current in either direction during overvoltage |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path to ground or return rail during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without polarity constraints or external circuitry |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free manufacturing with HM3 suffix |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly laid out on 5 mm × 5 mm copper pads |
| Fast response time | Clamps within <1 ps - faster than MOVs or GDTs - preserving signal integrity in high-speed data and sensor lines |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair or between signal and chassis ground to clamp transients before they reach MCU or signal conditioner. Use Value: Maintains signal fidelity under 100 V/μs slew rate transients while meeting AEC-Q101 reliability requirements for 15-year service life. | Use Scenario: Shielding digital input/output channels of programmable logic controllers from inductive kickback and EFT bursts in factory automation systems. IC Role / Device Role / Timing Role: Standoff-rated TVS installed at connector interface to shunt surge energy away from optocouplers and level shifters. Use Value: Enables >100,000 surge cycles without degradation, supporting maintenance-free operation in harsh electromagnetic environments. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Safeguarding primary-side controller ICs and rectifiers in AC-DC adapters against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Primary-side TVS connected between L/N and earth ground to limit common-mode overvoltage entering SMPS stage. Use Value: Absorbs 400 W peak energy per IEC 61000-4-5, reducing need for upstream varistors and simplifying Y-cap sizing. | Use Scenario: Protecting Ethernet PHY or DSL line drivers from induced surges on twisted-pair telecom lines exposed to outdoor environments. IC Role / Device Role / Timing Role: Differential-mode TVS array (using discrete SMAJ13CAHM3/H per line pair) clamping cross-talk and longitudinal surges. Use Value: Delivers <1 ns response and <22 V clamping to preserve signal eye diagram integrity up to 100 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13CAHE3/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Preferred for commercial-grade automotive modules where halogen content is unrestricted | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 compliance is mandatory |
| SMBJ13CAHM3 | Higher 600 W PPPM, larger SMB (DO-214AA) package, identical VWM/VC ratings | Better suited for higher-energy surge environments (e.g., 48 V battery systems) where board space allows | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and thermal margin is critical |
Compared with SMAJ13CAHE3/H, SMAJ13CAHM3/H adds halogen-free compliance without sacrificing AEC-Q101 qualification or clamping performance; versus SMBJ13CAHM3, it trades 200 W pulse power for 30 % smaller footprint and tighter layout compatibility in space-constrained modules.
Availability
SMAJ13CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMAJ13CAHM3/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-reliability transient suppression in automotive, industrial, and communications equipment - delivering consistent clamping behavior, AEC-Q101 validation, and optimized SMT manufacturability.
FAQ
What does the "HM3" suffix indicate in SMAJ13CAHM3/H?
The "HM3" suffix in SMAJ13CAHM3/H denotes halogen-free, RoHS-compliant construction with matte tin-plated leads, qualified to JESD 201 Class 2 whisker resistance, and rated for MSL Level 1 reflow (260 °C peak). It also confirms AEC-Q101 qualification for automotive use - distinguishing it from commercial-grade E3 variants. This makes SMAJ13CAHM3/H suitable for stringent environmental and reliability requirements in modern vehicle electronics.
Is SMAJ13CAHM3/H unidirectional or bidirectional, and how does that affect circuit placement?
SMAJ13CAHM3/H is a bidirectional TVS diode, meaning it clamps voltage transients equally in both polarities - ideal for protecting AC-coupled signals, differential buses (e.g., CAN, RS-485), or floating inputs where polarity is undefined. Unlike unidirectional versions, it has no cathode band marking and requires no orientation during placement, simplifying SMT assembly and eliminating risk of reverse installation. This symmetry is confirmed by identical VBR min/max values in both directions per Vishay's datasheet.
What is the maximum clamping voltage of SMAJ13CAHM3/H, and under what test condition is it specified?
The maximum clamping voltage (VC) of SMAJ13CAHM3/H is 21.5 V, measured at its peak pulse current (IPPM) of 18.6 A using the standardized 10/1000 μs double-exponential surge waveform. This value is guaranteed per Vishay's datasheet Table "ELECTRICAL CHARACTERISTICS" and defines the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs (e.g., 3.3 V or 5 V logic) remain within absolute maximum ratings.
Can SMAJ13CAHM3/H be used in place of SMAJ13A or SMAJ13CA with different suffixes?
SMAJ13CAHM3/H is not a direct drop-in replacement for SMAJ13A (unidirectional) or SMAJ13CA-E3 (non-halogen-free, non-AEC-Q101) due to fundamental differences in polarity and qualification. While electrically similar to SMAJ13CAHE3/H in VWM, VBR, and VC, the HM3 variant adds halogen-free compliance and retains AEC-Q101 qualification - making it suitable only where those attributes are required. Board layout remains identical, but functional equivalence depends on system-level reliability and regulatory needs.
What PCB layout guidance applies to SMAJ13CAHM3/H to achieve its rated 400 W pulse power?
To achieve the full 400 W peak pulse power rating, SMAJ13CAHM3/H must be mounted on minimum recommended copper pad areas: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, per Vishay's datasheet Note (2). Short, wide traces to ground or return planes minimize inductance, and thermal vias under pads improve heat dissipation during repetitive surges. Deviating from this layout reduces effective PPPM - especially above 78 V, where rating drops to 300 W - and may cause premature failure under IEC 61000-4-5 testing.
SMAJ13CAHM3/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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ13CAHM3/H FAQ
1.How can I place an order for SMAJ13CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13CAHM3/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 SMAJ13CAHM3/H reliable?
The price and inventory of SMAJ13CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMAJ13CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13CAHM3/H?
SMAJ13CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13CAHM3/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 SMAJ13CAHM3/H?
For technical support, including SMAJ13CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13CAHM3/H requirements.
6.How does Aetrix verify that SMAJ13CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMAJ13CAHM3/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 SMAJ13CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMAJ13CAHM3/H?
All SMAJ13CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13CAHM3/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 SMAJ13CAHM3/H part is unused and in its original packaging.
Return procedure for SMAJ13CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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