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Vishay General Semiconductor - Diodes Division SMAJ36CAHE3_A/I
- Part No.:
- SMAJ36CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36CAHE3_A/I.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
SMAJ36CAHE3_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 power and signal lines. It features a 36 V standoff voltage (VWM), 40.0–44.2 V breakdown voltage (VBR) at 1 mA, 58.1 V maximum clamping voltage (VC) at 6.9 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ36CAHE3_A/I datasheet, SMAJ36CAHE3_A/I pinout, SMAJ36CAHE3_A/I application, or SMAJ36CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
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 behavior and fast response time (<1 ns), while the SMA package supports high thermal dissipation via low RθJL (30 °C/W) and meets MSL Level 1 reflow requirements (260 °C peak).
The device complies with ANSI/IEEE C62.35 surge standards and delivers consistent clamping performance across -55 °C to +150 °C operating range. Its 0.1 % duty cycle rating (300 W above 78 V) and 40 A IFSM surge capability make it suitable for repetitive inductive switching events in automotive power distribution networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe working margin for 36 V nominal systems. |
| VBR min/max | 40.0 V / 44.2 V at 1 mA - Confirmed breakdown threshold range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 58.1 V at 6.9 A - Clamped voltage under 10/1000 μs surge; limits downstream component stress to ≤58.1 V. |
| PPPM | 400 W (10/1000 μs) - Peak transient energy handling capacity; sufficient for ISO 7637-2 Pulse 1/2a/5a automotive transients. |
| ID @ VWM | 1.0 μA - Ultra-low leakage at rated standoff voltage, minimizing standby power loss in battery-powered sensors. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial motor control enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC standard. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Accepts reverse surge current during negative transients; symmetrical with cathode for bidirectional conduction. |
| Cathode | Transient current entry (positive half-cycle) | Accepts forward surge current during positive transients; functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| 400 W peak pulse power | Handles high-energy transients such as load dump (ISO 16750-2) and inductive kickback in 12 V/24 V automotive systems. |
| AEC-Q101 qualification | Validated for automotive electronics use including engine control units, body controllers, and ADAS sensor modules. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; compatible with high-volume SMT assembly lines. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage drift over temperature and lifetime in harsh environments. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply rails feeding ECUs and lighting modules against load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting rail voltage to ≤58.1 V during ISO 16750-2 Pulse 5a events. Use Value: Prevents latch-up or permanent damage to downstream DC-DC converters and microcontrollers without adding series impedance. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor placed directly at connector entry point before signal conditioning circuitry. Use Value: Maintains signal integrity with <1 μA leakage at 36 V, avoiding DC offset errors in precision 4–20 mA loops. |
| Consumer USB Power Delivery | Telecom Line Card Surge Protection |
|
Use Scenario: Safeguarding USB-C port VBUS lines against hot-plug transients and adapter faults in portable docking stations. IC Role / Device Role / Timing Role: Fast-response (sub-ns) bidirectional clamp absorbing 400 W surges while preserving 5–20 V PD negotiation range. Use Value: Eliminates need for separate unidirectional devices on VBUS, reducing BOM count and PCB area in space-constrained designs. |
Use Scenario: Front-end protection of Ethernet PHY interfaces and POTS line drivers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on differential pairs, coordinated with GDTs or MOVs for multi-stage protection architecture. Use Value: Withstands repeated 10/1000 μs surges up to 6.9 A without degradation, supporting GR-1089-CORE compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA-M3 | Halogen-free, RoHS-compliant, non-AEC-Q101; identical electrical specs and package. | Targeted at commercial/industrial applications where automotive qualification is not required. | Select when halogen-free compliance is mandatory and AEC-Q101 is unnecessary. |
| SMBJ36CAHE3_A/I | SMB (DO-214AA) package; 600 W PPPM rating; same VWM/VBR/VC but larger footprint and higher surge capacity. | Suitable for higher-energy transients where board space allows larger package and enhanced thermal margin is needed. | Choose when system-level surge testing exceeds 400 W and SMB layout is feasible. |
Compared with SMAJ36CAHE3_A/I, SMAJ36CA-M3 offers identical protection performance without automotive qualification, while SMBJ36CAHE3_A/I provides 50 % higher peak power handling in a larger package-enabling design flexibility between space-constrained AEC-Q101 compliance and higher-energy industrial surge immunity.
Availability
SMAJ36CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with AEC-Q101 assurance, high-reliability transient suppression, and full traceability.
Supply support for SMAJ36CAHE3_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, efficiency, and application-specific optimization.
The SMAJ series is engineered for robust transient suppression in automotive, industrial, and communications equipment, delivering standardized 400 W surge capability in compact SMA packages with AEC-Q101 variants for mission-critical deployments.
FAQ
What is the clamping voltage of SMAJ36CAHE3_A/I at its rated peak pulse current?
The SMAJ36CAHE3_A/I exhibits a maximum clamping voltage (VC) of 58.1 V at its specified peak pulse current (IPPM) of 6.9 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for protected circuits. The SMAJ36CAHE3_A/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), making it suitable for under-hood automotive applications.
Is SMAJ36CAHE3_A/I qualified for automotive use?
Yes, SMAJ36CAHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88390. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating its suitability for automotive powertrain, chassis, and body electronics. The SMAJ36CAHE3_A/I meets the reliability requirements for deployment in ECU, ADAS, and lighting control modules.
What does the "CA" suffix indicate in SMAJ36CAHE3_A/I?
The "CA" suffix in SMAJ36CAHE3_A/I denotes a bidirectional configuration, meaning the device functions identically in both polarities and has no cathode band marking. Unlike unidirectional "A" variants, SMAJ36CAHE3_A/I suppresses transients on AC-coupled lines, floating buses, or differential signals without requiring orientation-aware placement. Its VBR and VC values apply symmetrically in either direction, simplifying layout and reducing risk of misassembly.
How does SMAJ36CAHE3_A/I compare to SMAJ36AHE3_A/I in practical design?
SMAJ36CAHE3_A/I is bidirectional with symmetrical clamping, whereas SMAJ36AHE3_A/I is unidirectional and requires correct cathode orientation. In applications like RS-485 or CAN bus termination, SMAJ36CAHE3_A/I eliminates polarity concerns and supports differential transient suppression without additional components. SMAJ36CAHE3_A/I also features identical VWM (36 V), VBR (40.0–44.2 V), and VC (58.1 V), but differs in leakage behavior and mounting flexibility due to its non-polarized construction.
What is the thermal resistance profile of SMAJ36CAHE3_A/I?
SMAJ36CAHE3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 30 °C/W and junction-to-ambient (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. This enables effective heat dissipation during repetitive surge events, supporting continuous operation at up to 3.3 W power dissipation at 50 °C ambient. The SMAJ36CAHE3_A/I's low RθJL ensures minimal thermal derating in high-density layouts where airflow is restricted.
SMAJ36CAHE3_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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ36CAHE3_A/I FAQ
1.How can I place an order for SMAJ36CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36CAHE3_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 SMAJ36CAHE3_A/I reliable?
The price and inventory of SMAJ36CAHE3_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 SMAJ36CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ36CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36CAHE3_A/I?
SMAJ36CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36CAHE3_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 SMAJ36CAHE3_A/I?
For technical support, including SMAJ36CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ36CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ36CAHE3_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 SMAJ36CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ36CAHE3_A/I?
All SMAJ36CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36CAHE3_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 SMAJ36CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ36CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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