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Vishay General Semiconductor - Diodes Division SMAJ10CAHM3_A/I
- Part No.:
- SMAJ10CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10CAHM3_A/I.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ10CAHM3_A/I 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 standoff 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), commonly used to protect MOSFET gates, sensor interfaces, and automotive ECUs against ESD and load dump.
For engineers reviewing the SMAJ10CAHM3_A/I datasheet, SMAJ10CAHM3_A/I pinout, SMAJ10CAHM3_A/I application, or SMAJ10CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM ≈ 1.7), AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 10 V), but triggers into low-impedance conduction when reverse (or forward, in bidirectional mode) voltage exceeds VBR, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns).
The SMAJ10CAHM3_A/I is rated for repetitive 10/1000 μs surges at 0.01% duty cycle (400 W up to 78 V; derated to 300 W above), with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. It supports operating junction temperatures from –55 °C to +150 °C and meets UL 497B recognition (QVGQ2) for telecom and industrial protectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 11.1 V / 12.3 V at 1 mA - Verified breakdown range ensuring reliable turn-on across process variation and temperature. |
| VC @ IPPM | 17.0 V at 23.5 A - Clamping voltage during 10/1000 μs surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 400 W - Peak pulse power handling with standard 10/1000 μs waveform; enables protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 1.0 μA - Reverse leakage at rated standoff voltage; ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 (260 °C peak reflow), UL 94 V-0 rated compound. Bidirectional construction has no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals serve identically as surge current entry/exit points; no cathode band marking required for bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns (e.g., RS-485, CAN bus, sensor bridges). |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and eliminates corrosive halogen emissions during PCB reflow or end-of-life incineration. |
| 400 W peak pulse power (10/1000 μs) | Provides robust immunity against ISO 7637-2 pulse 1/2a/2b and IEC 61000-4-5 combination wave surges in 12 V/24 V systems. |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes overvoltage exposure to downstream components-critical for protecting 3.3 V or 5 V logic interfaces. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting analog output pins of pressure or temperature sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to clamp spikes before reaching ADC input or signal conditioner. Use Value: Prevents sensor output saturation or latch-up during 12 V system transients up to 400 W, maintaining measurement accuracy and ECU reliability. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs communicating over long RS-485 cables subject to EFT and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS pair (one per line) referenced to common-mode ground, absorbing common-mode transients without disrupting DC bias. Use Value: Enables >10 kV ESD (IEC 61000-4-2) and ±2 kV surge (IEC 61000-4-5) immunity while preserving signal integrity at 10 Mbps data rates. |
| Consumer USB Port Protection | Telecom DSL Line Interface |
|
Use Scenario: Shielding USB 2.0 D+/D− lines in portable chargers and docking stations from human-body-model ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to USB connector, minimizing signal distortion. Use Value: Limits clamping voltage to ≤17 V during 8 kV contact discharge, preventing damage to USB PHY transceivers while meeting USB-IF eye diagram specs. |
Use Scenario: Front-end surge suppression on ADSL/VDSL line cards where asymmetric transients occur between tip/ring and ground. IC Role / Device Role / Timing Role: Paired SMAJ10CAHM3_A/I devices configured in back-to-back configuration across line-ground and line-line paths. Use Value: Achieves UL 497B recognition for telecom protectors and withstands repeated 10/1000 μs surges up to 400 W without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10CAHE3_A/I | Same electrical specs and package, but RoHS-compliant commercial grade (E3) without halogen-free certification. | Lacks halogen-free assurance; suitable for non-automotive industrial or consumer use where material compliance is less stringent. | Select SMAJ10CAHE3_A/I when halogen-free requirement is not mandated and cost optimization is prioritized. |
| SMBJ10CAHM3_A/I | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package with 600 W PPPM rating and higher IPPM (32.4 A). | Offers higher surge margin and lower thermal resistance (RθJA = 80 °C/W); requires larger PCB area and different pad layout. | Choose SMBJ10CAHM3_A/I when system-level surge testing exceeds 400 W or thermal dissipation is constrained. |
Compared with SMAJ10CAHE3_A/I, the SMAJ10CAHM3_A/I adds halogen-free compliance for automotive supply chains; versus SMBJ10CAHM3_A/I, it trades surge headroom for space-constrained layouts-making SMAJ10CAHM3_A/I optimal for AEC-Q101-compliant, space-limited 12 V node protection.
Availability
SMAJ10CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom line card designs requiring stable component supply with full traceability and lifecycle management.
Supply support for SMAJ10CAHM3_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, automotive qualification, and high-volume manufacturability.
The SMAJ series targets board-level transient suppression in harsh environments, with design focus on AEC-Q101 compliance, low clamping voltage, and compatibility with automated SMT assembly for automotive, industrial, and telecom applications.
FAQ
What does the "HM3" suffix indicate in SMAJ10CAHM3_A/I?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance and AEC-Q101 qualification. This makes SMAJ10CAHM3_A/I suitable for automotive applications where material compliance and long-term reliability under thermal cycling are mandatory, unlike E3-suffix variants which lack halogen-free certification.
Is SMAJ10CAHM3_A/I unidirectional or bidirectional?
SMAJ10CAHM3_A/I is a bidirectional TVS diode, as confirmed by the "CA" suffix and absence of cathode band marking. It provides symmetrical clamping for both positive and negative transients-ideal for protecting AC-coupled signals like RS-485, CAN, or audio lines without polarity constraints.
What is the maximum clamping voltage of SMAJ10CAHM3_A/I and under what test condition?
The maximum clamping voltage of SMAJ10CAHM3_A/I is 17.0 V, measured at 23.5 A peak pulse current (IPPM) using the standardized 10/1000 μs double-exponential surge waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does SMAJ10CAHM3_A/I meet automotive qualification standards?
Yes, SMAJ10CAHM3_A/I is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet revision 09-Jan-2024 (Document Number: 88390). This qualification covers stress tests including HTGB, HTRB, TCT, and mechanical shock-validating its suitability for under-hood and chassis-mounted automotive electronics.
How does the thermal performance of SMAJ10CAHM3_A/I affect PCB layout?
SMAJ10CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W on standard 0.2″ × 0.2″ copper pads. To maintain TJ ≤ 150 °C during repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks-especially critical in high-density automotive modules where ambient temperatures exceed 85 °C.
SMAJ10CAHM3_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:
- -
- 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_A/I FAQ
1.How can I place an order for SMAJ10CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10CAHM3_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 SMAJ10CAHM3_A/I reliable?
The price and inventory of SMAJ10CAHM3_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 SMAJ10CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ10CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10CAHM3_A/I?
SMAJ10CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10CAHM3_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 SMAJ10CAHM3_A/I?
For technical support, including SMAJ10CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10CAHM3_A/I requirements.
6.How does Aetrix verify that SMAJ10CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ10CAHM3_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 SMAJ10CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ10CAHM3_A/I?
All SMAJ10CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10CAHM3_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 SMAJ10CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ10CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ10CAHM3_A/I Tags
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