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Vishay General Semiconductor - Diodes Division SMAJ90CAHE3/61
- Part No.:
- SMAJ90CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90CAHE3/61.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,106
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Product details
Overview
SMAJ90CAHE3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 90 V stand-off voltage (VWM), 100–111 V breakdown voltage (VBR) at 1 mA, 146 V maximum clamping voltage (VC) at 2.1 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 μs waveform - deployed across automotive sensor lines, industrial I/O ports, and telecom interface circuits.
For engineers reviewing the SMAJ90CAHE3/61 datasheet, SMAJ90CAHE3/61 pinout, SMAJ90CAHE3/61 application, or SMAJ90CAHE3/61 equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, 150 °C junction temperature rating, low leakage (<1.0 μA at VWM), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ at 90 V), but switches to low-impedance conduction within <1 ns when transients exceed VBR. Its bidirectional structure enables symmetric clamping in both polarities without polarity marking - critical for AC-coupled signal lines and differential bus protection.
The device uses a glass-passivated silicon junction housed in an SMA package with matte tin-plated leads, rated for MSL Level 1 (260 °C reflow peak), and delivers 300 W derated pulse power above 78 V per JEDEC JESD22-A114. Thermal resistance is 120 °C/W (junction-to-ambient) on 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 100 V / 111 V at 1 mA - ensures reliable turn-on margin above system operating voltage |
| VC @ IPPM | 146 V at 2.1 A - defines worst-case voltage seen by protected IC during 10/1000 μs surge |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - peak transient energy absorption capability per standard waveform |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - supports operation in under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with IPC-7351B standard pad layout |
Pinout & Package
Two-terminal bidirectional device in SMA (DO-214AC) package; no polarity marking required. Terminals are matte tin-plated, solderable per J-STD-002 and JESD22-B102, with MSL Level 1 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (negative polarity) | Conducts surge current toward ground during negative transients; symmetrical with cathode |
| Cathode | Transient current sink (positive polarity) | Conducts surge current toward ground during positive transients; symmetrical with anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment interfaces |
| 400 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surges without degradation |
| Fast response time | <1 ns clamping activation enables protection of high-speed digital and analog interfaces |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, inductive switching) |
| MSL Level 1 | Supports single-reflow assembly without baking; compatible with standard SMT production lines |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed across signal line and ground, limiting voltage excursion to ≤146 V during 10/1000 μs surges. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V microcontrollers and signal-conditioning amplifiers exposed to ±100 V automotive transients. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between input terminal and common rail, clamping transients before they reach optocoupler input stages. Use Value: Enables >100,000 surge cycles without parameter shift, maintaining long-term reliability in factory automation environments. |
| Telecom Interface Protection | Consumer Power Adapter EMI Filtering |
Use Scenario: Shielding RS-485/RS-422 differential data lines in base stations and network equipment from lightning-induced surges and AC mains coupling. IC Role / Device Role / Timing Role: Paired bidirectional TVS devices (one per line) referenced to common-mode ground, providing symmetrical clamping on both A and B lines. Use Value: Maintains signal integrity up to 10 Mbps while meeting IEC 61000-4-5 Level 4 (4 kV) immunity requirements. |
Use Scenario: Suppressing fast transient bursts on secondary-side DC outputs of wall adapters used in USB-C PD and smart home hubs. IC Role / Device Role / Timing Role: Final-stage overvoltage limiter placed after DC-DC converter output filter, guarding downstream USB port controllers and battery management ICs. Use Value: Limits output voltage to ≤146 V during open-load or feedback-loop failure, preventing catastrophic failure of Type-C port ICs rated for 20 V max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90CA-M3/61 | Halogen-free, RoHS-compliant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected where halogen-free compliance is mandated | Choose SMAJ90CA-M3/61 when environmental compliance requires halogen-free materials without sacrificing performance. |
| SMCJ90CAHE3/61 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; 1500 W PPPM rating | Higher power handling suits higher-energy surge environments (e.g., outdoor telecom cabinets) | Choose SMCJ90CAHE3/61 only if board space allows larger footprint and system-level surge testing exceeds 400 W requirements. |
Compared with SMAJ90CAHE3/61, SMAJ90CA-M3/61 offers identical protection performance with halogen-free construction, while SMCJ90CAHE3/61 trades compact size for 3.75× higher pulse power - making SMAJ90CAHE3/61 optimal for space-constrained AEC-Q101 automotive modules where 400 W suffices.
Availability
SMAJ90CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom data line protection requiring stable component supply, AEC-Q101 traceability, and RoHS compliance.
Supply support for SMAJ90CAHE3/61 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 is engineered for cost-effective, high-reliability transient suppression in automotive, industrial, and communications systems - delivering standardized TVS performance in compact surface-mount packages with AEC-Q101 validation.
FAQ
What does the "HE3" suffix indicate in SMAJ90CAHE3/61?
The "HE3" suffix denotes that SMAJ90CAHE3/61 is RoHS-compliant and AEC-Q101 qualified - specifically certified for automotive applications. It also indicates matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards, and JESD201 Class 2 whisker resistance. This distinguishes it from commercial-grade "E3" or halogen-free "HM3" variants.
Is SMAJ90CAHE3/61 unidirectional or bidirectional, and how does that affect circuit placement?
SMAJ90CAHE3/61 is a bidirectional TVS diode, meaning it clamps voltage transients of either polarity symmetrically - no cathode band marking is present. This eliminates orientation concerns during placement and makes it ideal for AC-coupled lines, differential buses (e.g., RS-485), and floating signal paths where polarity reversal may occur. Unlike unidirectional versions, it requires no reference to system ground polarity.
What is the maximum clamping voltage of SMAJ90CAHE3/61, and why does it matter for protected ICs?
The maximum clamping voltage (VC) of SMAJ90CAHE3/61 is 146 V at 2.1 A peak pulse current (IPPM) under 10/1000 μs waveform. This value defines the highest voltage that will appear across the protected node during a specified surge event. For ICs with absolute maximum ratings below 150 V - such as many CAN transceivers and analog front-ends - this VC ensures safe operation without overstress, provided layout minimizes parasitic inductance.
How does the thermal resistance of SMAJ90CAHE3/61 impact its surge handling in real-world PCB layouts?
SMAJ90CAHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. In practice, this means repeated surges above 1 Hz duty cycle require careful thermal design - e.g., increased copper area or thermal vias - to avoid exceeding the 150 °C maximum junction temperature. Single-event 400 W surges remain safe due to short duration, but repetitive 300 W events demand thermal derating per Figure 2 in the datasheet.
Can SMAJ90CAHE3/61 be used in place of SMAJ90AHE3/61, and what is the key functional difference?
No - SMAJ90CAHE3/61 and SMAJ90AHE3/61 are not interchangeable without circuit review. SMAJ90CAHE3/61 is bidirectional (clamps both polarities), while SMAJ90AHE3/61 is unidirectional (cathode-marked, conducts only in reverse bias). Substituting one for the other risks failure: using the unidirectional version on an AC line causes forward conduction and potential burnout; using the bidirectional version in a DC-only path adds unnecessary cost and slightly higher leakage.
SMAJ90CAHE3/61 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):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 2.1A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ90CAHE3/61 FAQ
1.How can I place an order for SMAJ90CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90CAHE3/61 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 SMAJ90CAHE3/61 reliable?
The price and inventory of SMAJ90CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ90CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ90CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90CAHE3/61?
SMAJ90CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90CAHE3/61 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 SMAJ90CAHE3/61?
For technical support, including SMAJ90CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ90CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ90CAHE3/61 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 SMAJ90CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ90CAHE3/61?
All SMAJ90CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90CAHE3/61, 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 SMAJ90CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ90CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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