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Vishay General Semiconductor - Diodes Division SMAJ36CAHE3/61
- Part No.:
- SMAJ36CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36CAHE3/61.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,740
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Product details
Overview
SMAJ36CAHE3/61 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 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR) at 1 mA test current, and clamps to ≤58.1 V at 6.9 A peak pulse current under 10/1000 μs waveform - protecting MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ36CAHE3/61 datasheet, SMAJ36CAHE3/61 pinout, SMAJ36CAHE3/61 application, or SMAJ36CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 400 W peak pulse power rating, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the low Rsurge minimizes voltage overshoot during ESD or lightning-induced surges.
The device is rated for 400 W peak pulse power (10/1000 μs) up to 78 V, derating to 300 W above that threshold. With a maximum clamping voltage of 58.1 V at 6.9 A and reverse leakage <1.0 μA at 36 V, it provides precise overvoltage limiting for sensitive 3.3 V/5 V/12 V rail and interface protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 36 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 40.0–44.2 V at 1 mA - Confirmed minimum/maximum breakdown range; ensures predictable turn-on across production lots. |
| VC (Clamping Voltage) | ≤58.1 V at IPPM = 6.9 A (10/1000 μs) - Peak voltage seen by protected circuit during surge; critical for IC I/O voltage tolerance compliance. |
| PPPM (Peak Pulse Power) | 400 W - Sustains single high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a); derates to 300 W above 78 V. |
| ID (Reverse Leakage) | ≤1.0 μA at VWM = 36 V - Negligible standby current; avoids loading low-power sensor or battery-backed circuits. |
| TJ max | +150 °C - Enables operation in under-hood automotive or high-temperature industrial environments without thermal derating. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD22 standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads; meets UL 94 V-0, MSL Level 1 (260 °C reflow peak), and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 (unmarked end) | One side of symmetrical PN junction; no polarity marking required for bidirectional operation. |
| Cathode | Terminal 2 (unmarked end) | Other side of symmetrical PN junction; identical electrical behavior to Anode in CA-type devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses (e.g., RS-485, CAN), and ungrounded power rails without polarity constraints. |
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics use including engine control units, ADAS sensors, and body control modules. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream components - critical for 3.3 V/5 V logic and analog front-ends. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles without baking; supports high-yield automated SMT manufacturing. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs of ECUs and infotainment modules against load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and LDOs. Use Value: Limits transient voltage to ≤58.1 V, preventing damage to 40 V-rated input stages and ensuring system-level ISO 16750-2 compliance. |
Use Scenario: Shielding analog outputs (4–20 mA, 0–10 V) and digital I/O (I²C, SPI) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Low-capacitance shunt protector located at connector entry point. Use Value: Sub-1 μA leakage avoids signal offset errors; fast response preserves integrity of millisecond-scale sensor updates. |
| Telecom Data Line Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding RS-485 transceivers in building management systems exposed to induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional line protector on differential A/B bus lines. Use Value: Symmetric clamping maintains common-mode rejection; 58.1 V VC ensures transceiver survival under IEC 61000-4-5 Level 3 (1 kV/2 Ω). |
Use Scenario: Adding secondary surge immunity to USB 2.0 data lines (D+/D−) in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Secondary TVS stage after primary ESD array, handling higher-energy events. Use Value: 400 W rating absorbs multiple contact discharges; RoHS-compliant HE3 suffix meets global environmental compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA-M3/61 | Same electrical specs; halogen-free, RoHS-compliant, commercial-grade (non-AEC-Q101). | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost-sensitive non-automotive applications require halogen-free compliance without automotive validation. |
| SMBJ36CAHE3/61 | Same VWM/VBR/VC, but in larger SMB (DO-214AA) package; 600 W PPPM rating (vs. 400 W). | Higher power handling enables longer surge duration support; requires larger PCB footprint. | Choose when system-level surge testing exceeds 400 W requirements (e.g., IEC 61000-4-5 Level 4) and board space permits SMB layout. |
Compared with SMAJ36CAHE3/61, the M3 variant trades automotive qualification for halogen-free compliance in cost-sensitive applications, while the SMBJ36CAHE3/61 offers +50 % surge power headroom at the expense of footprint - enabling design flexibility across reliability, environmental, and energy-rating tiers.
Availability
SMAJ36CAHE3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom infrastructure equipment, and consumer USB peripherals requiring stable component supply with full AEC-Q101 traceability.
Supply support for SMAJ36CAHE3/61 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SMAJ36CAHE3/61?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ36CAHE3/61 provides symmetrical transient suppression in both polarities, making it ideal for AC signal lines, differential buses like RS-485 or CAN, and ungrounded power rails where polarity cannot be guaranteed. Unlike unidirectional "A" variants, SMAJ36CAHE3/61 has no cathode marking and identical VBR in either direction.
Is SMAJ36CAHE3/61 suitable for protecting a 3.3 V microcontroller I/O pin?
No - SMAJ36CAHE3/61 is not appropriate for direct 3.3 V I/O protection because its 36 V stand-off voltage (VWM) is far above the rail voltage, resulting in no clamping action until transients exceed ~40 V. For 3.3 V logic, a lower-voltage TVS such as SMAJ5.0CAHE3/61 (VWM = 5.0 V) is required to ensure timely clamping within the IC's absolute maximum ratings.
Does SMAJ36CAHE3/61 meet automotive qualification requirements?
Yes - the "HE3" suffix confirms SMAJ36CAHE3/61 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22 standards. This makes SMAJ36CAHE3/61 suitable for under-hood and chassis-mounted automotive electronics where reliability under thermal and mechanical stress is critical.
What is the maximum PCB pad size recommended for SMAJ36CAHE3/61 to achieve its rated 400 W pulse power?
To achieve the full 400 W peak pulse power rating, SMAJ36CAHE3/61 must be mounted on 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Smaller pads reduce thermal dissipation and cause premature failure under high-energy surges; this layout is essential for meeting IEC 61000-4-5 or ISO 7637-2 compliance.
How does the clamping voltage of SMAJ36CAHE3/61 compare to its breakdown voltage?
SMAJ36CAHE3/61 has a typical breakdown voltage (VBR) range of 40.0–44.2 V at 1 mA and clamps to ≤58.1 V at 6.9 A (10/1000 μs). This yields a clamping ratio (VC/VBR) of approximately 1.35–1.45 - indicating tight, efficient voltage limiting with minimal overshoot, which is critical for protecting modern low-voltage ICs with narrow absolute maximum ratings.
SMAJ36CAHE3/61 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):
- 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)
SMAJ36CAHE3/61 FAQ
1.How can I place an order for SMAJ36CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36CAHE3/61 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 SMAJ36CAHE3/61 reliable?
The price and inventory of SMAJ36CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ36CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36CAHE3/61?
SMAJ36CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36CAHE3/61 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 SMAJ36CAHE3/61?
For technical support, including SMAJ36CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ36CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ36CAHE3/61 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 SMAJ36CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ36CAHE3/61?
All SMAJ36CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36CAHE3/61, 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 SMAJ36CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ36CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ36CAHE3/61 Tags
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