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Vishay General Semiconductor - Diodes Division SMAJ10CAHM3/H
- Part No.:
- SMAJ10CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10CAHM3/H.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,063
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Product details
Overview
SMAJ10CAHM3/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 or power lines. It features 10 V stand-off voltage (VWM), 11.1–12.3 V breakdown voltage (VBR) at 1 mA, 17.0 V maximum clamping voltage (VC) at 23.5 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform). It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMAJ10CAHM3/H datasheet, SMAJ10CAHM3/H pinout, SMAJ10CAHM3/H application, or SMAJ10CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, 17.0 V clamping voltage under 23.5 A surge, MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction per HM3 suffix.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA configuration, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports rapid energy dissipation during transient events.
The device is rated for 400 W peak pulse power (10/1000 μs) up to 78 V, derating to 300 W above that threshold. With a thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), it relies on PCB copper pad thermal management-specifically 0.2" × 0.2" (5.0 mm × 5.0 mm) pads per terminal-for reliable power handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 10 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 11.1–12.3 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 17.0 V at IPPM = 23.5 A - Peak voltage seen by protected circuit during full-rated 400 W transient; critical for downstream IC survivability. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - Energy-handling capacity for standard lightning/surge waveforms; validated with 0.01% duty cycle. |
| ID (Reverse Leakage) | ≤1.0 μA at 10 V - Minimal standby current ensures negligible power loss and signal integrity in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in under-hood automotive or industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 2.54 mm lead pitch; compatible with automated placement and reflow. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, meeting JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One end of symmetrical P-N junction; conducts surge current equally in either direction during overvoltage. |
| Cathode | Transient current exit (bidirectional) | Other end of symmetrical P-N junction; forms low-impedance path to ground or return rail during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per JESD22 standards. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for modern automotive and industrial electronics manufacturing. |
| 400 W peak pulse power (10/1000 μs) | Handles IEC 61000-4-5 Level 4 surge events (4 kV line-to-line, 2 kV line-to-ground) when properly mounted. |
| MSL Level 1 (J-STD-020) | Unlimited floor life at ≤30 °C/60% RH; supports standard SMT assembly without baking or special handling. |
| Low clamping ratio (VC/VBR ≈ 1.5) | Ensures tight voltage limiting-critical for protecting 12 V rail logic interfaces and low-voltage sensor front-ends. |
Applications
| Automotive Body Control Module (BCM) | Industrial CAN Bus Interface Protection |
|---|---|
|
Use Scenario: Protecting microcontroller GPIOs and LIN bus transceivers from load-dump and alternator ripple-induced transients in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power input and signal lines to limit voltage excursions to <17.0 V during 100 ms load-dump events. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic ICs while maintaining signal integrity during repetitive switching noise. |
Use Scenario: Safeguarding CANH/CANL differential pair against ESD and inductive kickback from solenoid drivers in factory automation PLCs. IC Role / Device Role / Timing Role: Symmetrical TVS pair (one per line) referenced to common ground, responding within <1 ns to sub-100 ns transients. Use Value: Maintains CAN FD bit timing integrity by limiting overshoot/undershoot to ≤±17.0 V, avoiding false dominant/recessive interpretation. |
| Consumer Appliance Motor Drive Board | Telecom Power Supply Input Stage |
|
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart HVAC actuators and washing machine control boards. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals and H-bridge supply rails to clamp flyback voltages during PWM switching. Use Value: Eliminates need for snubber RC networks-reducing BOM count and board space while sustaining 400 W surge rating at 125 °C ambient. |
Use Scenario: Front-end transient suppression on 48 V telecom rectifier outputs feeding PoE injectors and baseband processors. IC Role / Device Role / Timing Role: Primary-level TVS on DC input rail, coordinated with upstream MOVs to handle combined lightning and switching surges. Use Value: Enables single-stage protection architecture with 17.0 V clamping-preserving headroom for downstream 42 V-rated DC-DC 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 |
|---|---|---|---|
| SMAJ10CAHE3/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Acceptable where halogen-free requirement is not mandated (e.g., non-automotive industrial). | Select when cost optimization is prioritized over halogen-free compliance. |
| SMBJ10CAHM3 | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; 600 W PPPM rating. | Better thermal performance in high-power or high-temperature environments; requires larger PCB footprint. | Choose when higher surge margin or improved thermal derating is needed without changing circuit topology. |
Compared with SMAJ10CAHM3/H, SMAJ10CAHE3/H offers identical protection performance without halogen-free assurance, while SMBJ10CAHM3 provides higher pulse power handling at the expense of board area-making SMAJ10CAHM3/H optimal for space-constrained AEC-Q101 automotive designs requiring halogen-free materials.
Availability
SMAJ10CAHM3/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN networks, consumer appliance motor controls, and telecom power input stages requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ10CAHM3/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 robust transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low clamping voltage, and surface-mount compatibility are essential.
FAQ
What does the 'HM3' suffix indicate in SMAJ10CAHM3/H?
The HM3 suffix in SMAJ10CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JEDEC J-STD-020 MSL Level 1, JESD 201 Class 2 whisker resistance, and material restrictions for automotive-grade deployment. SMAJ10CAHM3/H meets all environmental and reliability requirements specified in the Vishay document 88390 revision 09-Jan-2024.
Is SMAJ10CAHM3/H suitable for protecting 12 V automotive power rails?
Yes, SMAJ10CAHM3/H is specifically designed for 12 V system protection: its 10 V stand-off voltage provides adequate margin below nominal 12 V, while its 17.0 V clamping voltage ensures downstream 16 V-rated ICs remain within safe operating limits during load-dump transients. The AEC-Q101 qualification and +150 °C TJ max. further validate its suitability for under-hood automotive use.
How does SMAJ10CAHM3/H differ from unidirectional SMAJ10A variants?
SMAJ10CAHM3/H is bidirectional with symmetrical clamping in both polarities, making it ideal for AC-coupled or differential signal lines like CAN or USB. In contrast, SMAJ10A is unidirectional and features a cathode band marking; it conducts only in reverse bias and cannot protect against positive-going transients on grounded lines. Electrical parameters (VWM, VBR, VC) are otherwise matched per datasheet table.
What is the maximum peak pulse current (IPPM) rating for SMAJ10CAHM3/H?
The maximum peak pulse current (IPPM) for SMAJ10CAHM3/H is 23.5 A under the standard 10/1000 μs waveform condition, corresponding to its 400 W peak pulse power rating. This value is measured at TA = 25 °C with devices mounted on 0.2" × 0.2" copper pads per terminal, as defined in Figure 1 and Table 1 of Vishay document 88390.
Does SMAJ10CAHM3/H require a heatsink for standard operation?
No external heatsink is required for SMAJ10CAHM3/H under typical single-pulse or low-duty-cycle surge conditions. Its thermal design relies on PCB copper pad conduction: the datasheet specifies 0.2" × 0.2" (5.0 mm × 5.0 mm) pads per terminal to achieve the rated 400 W pulse power. RθJA is 120 °C/W, so sustained power dissipation must remain below 3.3 W (PD rating) without additional cooling.
SMAJ10CAHM3/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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 23.5A
- 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)
SMAJ10CAHM3/H FAQ
1.How can I place an order for SMAJ10CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10CAHM3/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 SMAJ10CAHM3/H reliable?
The price and inventory of SMAJ10CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ10CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMAJ10CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10CAHM3/H?
SMAJ10CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10CAHM3/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 SMAJ10CAHM3/H?
For technical support, including SMAJ10CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10CAHM3/H requirements.
6.How does Aetrix verify that SMAJ10CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMAJ10CAHM3/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 SMAJ10CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMAJ10CAHM3/H?
All SMAJ10CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10CAHM3/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 SMAJ10CAHM3/H part is unused and in its original packaging.
Return procedure for SMAJ10CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ10CAHM3/H Tags
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