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Vishay General Semiconductor - Diodes Division SMAJ10CAHM3_A/H
- Part No.:
- SMAJ10CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10CAHM3_A/H.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ10CAHM3_A/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 a 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), used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMAJ10CAHM3_A/H datasheet, SMAJ10CAHM3_A/H pinout, SMAJ10CAHM3_A/H application, or SMAJ10CAHM3_A/H equivalent, this device is selected for robust ESD and surge protection where bidirectional clamping, low clamping ratio (VC/VBR ≈ 1.53), AEC-Q101 qualification, and halogen-free RoHS compliance are required in space-constrained PCB layouts.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the low incremental surge resistance supports effective energy diversion during 10/1000 μs surges.
The device is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its 1.0 μA maximum reverse leakage at VWM enables minimal standby power impact in always-on sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 10 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 11.1–12.3 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 17.0 V at IPPM = 23.5 A - Peak voltage seen by protected circuit during 400 W transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - Energy-handling capability for common lightning/inductive-spike waveforms; derates to 300 W above 78 V. |
| ID (Reverse Leakage) | 1.0 μA max at VWM - Low leakage preserves signal integrity and battery life in high-impedance sensor or communication lines. |
| TJ max. | 150 °C - Enables operation in under-hood automotive or industrial environments with elevated ambient temperatures. |
| Package | SMA (DO-214AC) - Surface-mount footprint (4.93 mm × 3.99 mm) compatible with automated assembly and IPC-7351B land patterns. |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration with no polarity marking; terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in both directions; no cathode band marking - device functions identically regardless of orientation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, RS-485, sensor bridges) without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for engine control and ADAS subsystems. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and eliminates corrosive halogen emissions during reflow or end-of-life processing. |
| 400 W peak pulse power (10/1000 μs) | Handles IEC 61000-4-5 Level 4 surge (4 kV line-to-ground) when properly mounted on 5 mm × 5 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.53) | Minimizes overvoltage stress on protected ICs - critical for 3.3 V or 5 V logic interfacing with legacy 12 V automotive buses. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient voltage to ≤17.0 V during 10/1000 μs surges up to 23.5 A. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADC drivers while maintaining <1.0 μA leakage at 10 V nominal bus voltage. |
Use Scenario: Shielding digital input channels of programmable logic controllers against EFT bursts and inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Fast-response (<1 ns) voltage clamp placed directly at connector entry point to shunt surge energy before reaching optocoupler inputs. Use Value: Ensures immunity to IEC 61000-4-4 Level 4 (4 kV) EFT without degrading signal rise time due to low junction capacitance (~100 pF at 0 V). |
| Consumer USB Port Protection | Telecom Line Interface Protection |
|
Use Scenario: Safeguarding USB 2.0 D+/D− lines in portable medical devices against human-body-model (HBM) ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed adjacent to USB connector to clamp ±15 kV HBM ESD to <17.0 V within nanoseconds. Use Value: Maintains signal integrity with minimal capacitive loading (typ. 100 pF), avoiding USB 2.0 eye diagram distortion while meeting IEC 61000-4-2 Level 4 requirements. |
Use Scenario: Protecting RS-485 transceiver pins in base station remote units subjected to lightning-induced surges on long outdoor cable runs. IC Role / Device Role / Timing Role: Primary clamping device on differential bus lines, coordinated with GDT or MOV secondary protection stages. Use Value: Provides precise 17.0 V clamping ceiling to prevent transceiver damage while supporting >100,000 surge cycles due to robust glass-passivated junction. |
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_A/H | Same electrical specs and package; RoHS-compliant but not halogen-free (E3 vs HM3). | Lacks halogen-free certification; acceptable for commercial but not automotive or green-certified industrial designs. | Select SMAJ10CAHE3_A/H only if halogen-free material is not mandated by customer spec or regional regulation. |
| SMBJ10CAHM3_A/H | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; 600 W PPPM rating. | Higher power handling and lower thermal resistance (RθJA = 85 °C/W), but occupies ~40% more board area. | Choose SMBJ10CAHM3_A/H when system-level surge tests exceed 400 W or thermal dissipation is marginal on small PCB pads. |
Compared with SMAJ10CAHE3_A/H, the SMAJ10CAHM3_A/H adds halogen-free compliance for stricter environmental programs; compared with SMBJ10CAHM3_A/H, it trades 200 W pulse power headroom for compactness - making SMAJ10CAHM3_A/H optimal for space-constrained AEC-Q101 automotive modules.
Availability
SMAJ10CAHM3_A/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 with full traceability and lifecycle management.
Supply support for SMAJ10CAHM3_A/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, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SMAJ series was engineered for high-reliability transient suppression in automotive, industrial, and communications infrastructure - delivering consistent clamping, AEC-Q101 validation, and surface-mount scalability across voltage grades.
FAQ
What is the maximum clamping voltage of SMAJ10CAHM3_A/H at its rated peak pulse current?
The SMAJ10CAHM3_A/H has a maximum clamping voltage (VC) of 17.0 V at its specified peak pulse current (IPPM) of 23.5 A, measured under the standardized 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and ensures downstream ICs experience no more than 17.0 V during surge events - critical for protecting 3.3 V or 5 V logic interfaces. The clamping performance is validated per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024.
Is SMAJ10CAHM3_A/H suitable for automotive applications?
Yes, SMAJ10CAHM3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It meets requirements for temperature cycling, mechanical shock, and humidity bias testing, and is recommended for engine control units, body electronics, and ADAS sensor interfaces. The device's 150 °C maximum junction temperature and low leakage support under-hood deployment, and its bidirectional behavior simplifies layout in differential or floating signal paths commonly found in automotive networks.
How does the bidirectional design of SMAJ10CAHM3_A/H affect PCB layout?
The bidirectional design of SMAJ10CAHM3_A/H eliminates polarity constraints - there is no cathode band marking, and either terminal may connect to either side of the protected line. This allows symmetrical placement across differential pairs (e.g., RS-485, CAN) or AC-coupled signals without orientation verification during assembly. Layout requires only standard SMA (DO-214AC) footprints with 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve full 400 W pulse rating, per Vishay's mounting recommendations in document 88390.
What is the reverse leakage current specification for SMAJ10CAHM3_A/H at its stand-off voltage?
SMAJ10CAHM3_A/H specifies a maximum reverse leakage current (ID) of 1.0 μA at its 10 V stand-off voltage (VWM), tested at 25 °C. This ultra-low leakage preserves signal fidelity in high-impedance sensor front-ends and extends battery life in always-on monitoring systems. The value remains stable across temperature due to the device's glass-passivated junction, and is verified per JEDEC test conditions - making SMAJ10CAHM3_A/H suitable for precision analog interfaces where leakage-induced offset or drift must be minimized.
Does SMAJ10CAHM3_A/H meet UL recognition standards?
Yes, SMAJ10CAHM3_A/H carries Underwriters Laboratory (UL) Recognition under file E136766 for both unidirectional and bidirectional configurations, compliant with UL 497B for signal line protectors. This certification confirms its suitability for use in safety-critical telecommunications, industrial control, and medical equipment where third-party validation of surge suppression performance is mandated. The UL listing applies specifically to the SMAJ10CAHM3_A/H variant as shipped - no additional qualification is needed by end users for UL-marked final products.
SMAJ10CAHM3_A/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:
- 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/H FAQ
1.How can I place an order for SMAJ10CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10CAHM3_A/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_A/H reliable?
The price and inventory of SMAJ10CAHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ10CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10CAHM3_A/H?
SMAJ10CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10CAHM3_A/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_A/H?
For technical support, including SMAJ10CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10CAHM3_A/H requirements.
6.How does Aetrix verify that SMAJ10CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ10CAHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ10CAHM3_A/H?
All SMAJ10CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10CAHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for SMAJ10CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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