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Vishay General Semiconductor - Diodes Division SMAJ36-E3/61
- Part No.:
- SMAJ36-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36-E3/61.pdf
- Description:
- TVS DIODE 36VWM 64.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,538
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Product details
Overview
SMAJ36-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on power and signal lines. It features a 36 V stand-off voltage (VWM), 40.0–48.9 V breakdown voltage (VBR at 1.0 mA), 64.3 V maximum clamping voltage (VC) at 6.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMAJ36-E3/61 datasheet, SMAJ36-E3/61 pinout, SMAJ36-E3/61 application, or SMAJ36-E3/61 equivalent, key selection criteria include its unidirectional polarity, 150 °C max junction temperature, 1.0 µA reverse leakage at VWM, RoHS-compliant matte tin terminals, and MSL Level 1 moisture sensitivity rating per J-STD-020.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, enabling fast response to ESD and lightning-induced surges.
The device is rated for 40 A non-repetitive forward surge current (IFSM) under 8.3 ms half-sine wave, and exhibits 120 °C/W typical junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads - critical for thermal management in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR (min/max) | 40.0 V / 48.9 V at 1.0 mA - Ensures reliable turn-on within tight tolerance; guarantees clamping activation above system nominal voltage. |
| VC @ IPPM | 64.3 V at 6.2 A - Clamped voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream components. |
| PPPM | 400 W - Peak pulse power handling capability; supports robust protection against IEC 61000-4-5 Level 3/4 surges. |
| IFSM | 40 A - Withstands single half-sine surge events without failure; enables use in AC line and motor drive inputs. |
| TJ max | +150 °C - Allows operation in high-temperature environments such as automotive engine compartments or industrial enclosures. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with two leads, cathode indicated by a band on one end. Matte tin-plated terminals meet J-STD-002 solderability and JESD22-B102 reliability standards. MSL Level 1 rating permits unlimited floor life at ≤30 °C/60% RH.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to lower-potential side of protected line (e.g., ground return path); conducts during surge clamp in unidirectional mode. |
| Cathode | Current exit point in forward bias; marked with band | Connected to higher-potential side (e.g., VIN or signal line); defines polarity-sensitive placement for correct clamping direction. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime; eliminates parameter drift due to environmental exposure. |
| 400 W peak pulse power (10/1000 µs) | Provides certified surge immunity for IEC 61000-4-5 4 kV/2 Ω test conditions without derating below 78 V. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive logic. |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets EU Directive 2002/95/EC; qualified per JESD201 Class 1A whisker resistance for long-term solder joint integrity. |
| MSL Level 1 (260 °C reflow) | Enables standard lead-free reflow assembly without baking or special handling; reduces manufacturing overhead. |
Applications
| Industrial Power Input Protection | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V DC input rails in PLC modules against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp positive transients exceeding 36 V. Use Value: Limits clamped voltage to 64.3 V, preventing damage to upstream DC-DC controllers and downstream microcontrollers. |
Use Scenario: Safeguarding analog output lines (e.g., 0–10 V or 4–20 mA) from ESD and cable discharge events in vehicle cabin sensors. IC Role / Device Role / Timing Role: Fast-response clamping element on signal path, positioned adjacent to connector interface. Use Value: Sub-1 ns response time and 1.0 µA leakage preserve signal accuracy while suppressing ±8 kV contact ESD per IEC 61000-4-2. |
| Consumer Equipment USB Port Protection | Telecom DSL Line Interface Protection |
Use Scenario: Adding secondary surge protection on VBUS line of USB 2.0 host ports in set-top boxes and monitors. IC Role / Device Role / Timing Role: Standoff-rated TVS in series with polyfuse, absorbing residual transients after primary MOV suppression. Use Value: 36 V VWM avoids false triggering during 5.25 V VBUS tolerance excursions; 64.3 V VC protects USB PHY transceivers. |
Use Scenario: Front-end protection for ADSL/VDSL line drivers exposed to lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary unidirectional clamp on line-side transformer secondary winding. Use Value: 400 W rating handles repetitive surges up to 10/1000 µs; DO-214AC footprint allows dense layout near RJ-11 connector. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/61 | Lower VBR range (40.0–44.2 V), tighter 10% VWM/VBR ratio, 58.1 V VC at 6.9 A | Better suited for systems requiring lower clamping voltage margin; slightly reduced surge current capacity | Select SMAJ36A-E3/61 when VC < 60 V is mandatory and system operating voltage has tighter tolerance. |
| SMBJ36A-E3/52 | DO-214AA (SMB) package, 600 W PPPM, 58.1 V VC at 10.3 A, same VWM/VBR specs | Larger footprint but higher power handling; requires PCB pad redesign | Choose SMBJ36A-E3/52 only when 400 W is insufficient and board space allows SMB package integration. |
Compared with SMAJ36-E3/61, SMAJ36A-E3/61 offers lower clamping voltage at the cost of reduced surge current headroom, while SMBJ36A-E3/52 delivers higher power robustness in a larger package - neither is pin-compatible, and both require layout verification for mechanical fit and thermal relief.
Availability
SMAJ36-E3/61 is available at Aetrix Electronics and suitable for industrial power input protection, automotive sensor interface hardening, and telecom line driver safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMAJ36-E3/61 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, efficiency, and manufacturability.
The SMAJ series is engineered specifically for surface-mount transient suppression in space-constrained, high-reliability applications - balancing clamping performance, thermal robustness, and automated assembly compatibility.
FAQ
What is the polarity configuration of SMAJ36-E3/61?
SMAJ36-E3/61 is a unidirectional TVS diode, meaning it conducts only when the cathode is at a higher potential than the anode. The cathode is marked by a band on the DO-214AC body. This configuration makes SMAJ36-E3/61 appropriate for DC power rail protection where polarity is fixed, unlike bi-directional variants (e.g., SMAJ36CA) used for AC or floating signal lines.
Does SMAJ36-E3/61 meet automotive qualification standards?
No, SMAJ36-E3/61 is the commercial-grade variant with E3 suffix and is not AEC-Q101 qualified. For automotive applications, Vishay offers the SMAJ36HE3/61 variant (HE3 suffix), which meets AEC-Q101 requirements and is rated for extended temperature operation and enhanced reliability testing. SMAJ36-E3/61 remains suitable for industrial and consumer designs.
What is the maximum clamping voltage of SMAJ36-E3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ36-E3/61 is 64.3 V at a peak pulse current (IPPM) of 6.2 A, measured using the standardized 10/1000 µs double-exponential waveform. This value represents the upper limit of voltage imposed on the protected circuit during worst-case transient events, and must be verified against the absolute maximum ratings of downstream components.
Can SMAJ36-E3/61 be used in bi-directional signal protection?
No, SMAJ36-E3/61 is unidirectional and unsuitable for true bi-directional signal lines such as RS-485 or CAN bus without additional circuitry. For symmetric transient suppression on AC or bidirectional data paths, the bi-directional SMAJ36CA-E3/61 variant - with identical VWM and VC in both polarities - must be selected instead. Using SMAJ36-E3/61 in such roles risks forward conduction and latch-up.
What is the thermal resistance specification for SMAJ36-E3/61?
SMAJ36-E3/61 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 defined in the Vishay datasheet. This value assumes standard FR-4 PCB construction and natural convection cooling; actual thermal performance improves with larger copper areas or forced airflow.
SMAJ36-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 64.3V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ36-E3/61 FAQ
1.How can I place an order for SMAJ36-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36-E3/61 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 SMAJ36-E3/61 reliable?
The price and inventory of SMAJ36-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ36-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36-E3/61?
SMAJ36-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36-E3/61 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 SMAJ36-E3/61?
For technical support, including SMAJ36-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36-E3/61 requirements.
6.How does Aetrix verify that SMAJ36-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ36-E3/61 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 SMAJ36-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ36-E3/61?
All SMAJ36-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36-E3/61, 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 SMAJ36-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ36-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ36-E3/61 Tags
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