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Vishay General Semiconductor - Diodes Division SMAJ90CAHE3/5A
- Part No.:
- SMAJ90CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90CAHE3/5A.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,953
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Product details
Overview
SMAJ90CAHE3/5A 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 V minimum breakdown voltage (VBR), 146 V maximum clamping voltage (VC) at 2.1 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ90CAHE3/5A datasheet, SMAJ90CAHE3/5A pinout, SMAJ90CAHE3/5A application, or SMAJ90CAHE3/5A equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical clamping behavior above ±90 V reverse stand-off. Its glass-passivated junction enables fast response (<1 ns) to transients induced by inductive switching or ESD events, while maintaining low incremental surge resistance to minimize voltage overshoot during high-current surges.
The device is rated for repetitive 10/1000 μs pulses at 0.01 % duty cycle (400 W up to 78 V; 300 W above), with derating above TA = 25 °C per Fig. 2. Junction temperature range spans −55 °C to +150 °C, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC working margin. |
| VBR (min) | 100 V at IT = 1 mA - Minimum voltage at which device enters avalanche conduction; ensures reliable turn-on above system operating voltage. |
| VC (max) | 146 V at IPPM = 2.1 A - Peak clamped voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Surge energy handling capability under standardized waveform; defines transient immunity level. |
| ID (max) | 1.0 μA at VWM - Reverse leakage current at stand-off voltage; critical for low-power sensor or battery-backed circuits. |
| TJ max. | +150 °C - Maximum junction temperature; sets thermal design limits for PCB pad layout and ambient derating. |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; guides heatsinking requirements. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Case dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts surge current during negative-going transients; connects to protected line or ground reference. |
| Cathode | Transient current entry (positive polarity) | Accepts surge current during positive-going transients; symmetrical role to Anode in bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood and ADAS applications. |
| 400 W peak pulse power | Withstands 10/1000 μs transients up to 2.1 A without degradation - protects against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| Glass passivated junction | Ensures stable avalanche characteristics and low leakage across temperature and lifetime - improves long-term clamping consistency. |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 260 °C peak - eliminates moisture sensitivity concerns and pre-bake requirements. |
| Low profile SMA package | 0.208" × 0.177" footprint with 0.090" height - enables compact layout in space-constrained modules like motor drivers and CAN nodes. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V power inputs in engine control units (ECUs) and body control modules (BCMs) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between power rail and chassis ground to shunt surge energy away from LDOs and microcontrollers. Use Value: Limits transient voltage to ≤146 V during ISO 7637-2 Pulse 5a (load dump), preventing latch-up or permanent damage to downstream ICs. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA, 0–5 V) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across signal and return path to absorb ESD and switching noise without distorting low-bandwidth signals. Use Value: Maintains signal integrity with <1.0 μA leakage at 90 V, enabling accurate sub-mV measurement in precision sensor front-ends. |
| Telecom Interface Port Protection | Consumer Device USB/DC Jack Protection |
|
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs in base station remote radio units exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS mounted at connector entry point to divert >1 kV transients before reaching isolation barriers or data lines. Use Value: Clamps within <1 ns to limit voltage overshoot below 146 V, preserving signal integrity and meeting IEC 61000-4-5 Level 3 (2 kV) compliance. |
Use Scenario: Securing 5 V/9 V DC input jacks and USB VBUS lines in smart home hubs and portable audio devices against user-handling ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between input rail and ground to absorb ±8 kV contact / ±15 kV air ESD per IEC 61000-4-2. Use Value: Delivers 400 W surge handling with RoHS-compliant, halogen-free (HM3 variant) construction - supports global environmental compliance and field reliability. |
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-M3/5A | Same electrical specs, halogen-free RoHS-compliant version; identical AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects). | Choose SMAJ90CA-M3/5A when halogen-free content is required without compromising automotive qualification. |
| SMAJ90AHE3/5A | Unidirectional variant; cathode-marked; same VWM (90 V), VBR (100 V min), VC (146 V), but asymmetric conduction (forward bias conducts, reverse blocks until breakdown). | Requires polarity-aware layout; unsuitable for AC-coupled or floating signal lines where bidirectional clamping is mandatory. | Select SMAJ90AHE3/5A only for DC power rails with known polarity and where unidirectional clamping suffices. |
Compared with SMAJ90CA-M3/5A, SMAJ90CAHE3/5A shares full electrical and qualification equivalence but uses standard RoHS-compliant (non-halogen-free) terminations; versus SMAJ90AHE3/5A, it provides essential symmetrical clamping for AC or floating nodes - making SMAJ90CAHE3/5A the only drop-in solution for bidirectional protection in automotive and telecom interfaces.
Availability
SMAJ90CAHE3/5A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom port protection, and consumer DC input protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMAJ90CAHE3/5A 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, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, fast response, and qualification compliance are non-negotiable.
FAQ
What is the clamping voltage of SMAJ90CAHE3/5A at its rated peak pulse current?
The SMAJ90CAHE3/5A exhibits a maximum clamping voltage (VC) of 146 V when subjected to its rated peak pulse current (IPPM) of 2.1 A under the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMAJ90CAHE3/5A maintains this performance across its full operating temperature range.
Is SMAJ90CAHE3/5A qualified for automotive applications?
Yes, SMAJ90CAHE3/5A is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" (RoHS-compliant + AEC-Q101). It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification to ensure reliability in automotive environments such as engine control, infotainment, and ADAS subsystems. This qualification applies specifically to the HE3 variant and is documented in Vishay's compliance files.
How does SMAJ90CAHE3/5A differ from unidirectional SMAJ90AHE3/5A?
SMAJ90CAHE3/5A is bidirectional with symmetrical clamping in both polarities and no polarity marking, whereas SMAJ90AHE3/5A is unidirectional with a cathode band and conducts only in reverse breakdown - forward bias behaves as a low-VF diode. This makes SMAJ90CAHE3/5A mandatory for AC-coupled lines, floating grounds, or any application requiring equal protection against positive and negative transients. The SMAJ90CAHE3/5A cannot be substituted with SMAJ90AHE3/5A without layout and schematic review.
What is the thermal resistance and recommended pad layout for SMAJ90CAHE3/5A?
The SMAJ90CAHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - as specified in Vishay's datasheet Figure 2 derating curve. Deviation from this pad size increases thermal impedance, reducing safe surge repetition rate. For sustained operation near TJ max (150 °C), additional thermal vias or larger copper areas are advised. The SMAJ90CAHE3/5A must not exceed 150 °C junction temperature under worst-case conditions.
Does SMAJ90CAHE3/5A meet lead-free and RoHS requirements?
Yes, SMAJ90CAHE3/5A is RoHS-compliant and lead-free, as indicated by the "HE3" suffix per Vishay's ordering nomenclature. It uses matte tin-plated leads and conforms to J-STD-002 and JESD 22-B102 solderability standards. The device also satisfies JEDEC JESD201 Class 2 whisker resistance and is rated MSL Level 1 for moisture sensitivity - enabling compatibility with standard Pb-free reflow profiles peaking at 260 °C.
SMAJ90CAHE3/5A 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)
SMAJ90CAHE3/5A FAQ
1.How can I place an order for SMAJ90CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90CAHE3/5A 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 SMAJ90CAHE3/5A reliable?
The price and inventory of SMAJ90CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ90CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ90CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90CAHE3/5A?
SMAJ90CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90CAHE3/5A 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 SMAJ90CAHE3/5A?
For technical support, including SMAJ90CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90CAHE3/5A requirements.
6.How does Aetrix verify that SMAJ90CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ90CAHE3/5A 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 SMAJ90CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ90CAHE3/5A?
All SMAJ90CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90CAHE3/5A, 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 SMAJ90CAHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ90CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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