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Vishay General Semiconductor - Diodes Division SMAJ36CA-M3/61
- Part No.:
- SMAJ36CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36CA-M3/61.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,070
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Product details
Overview
SMAJ36CA-M3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection on signal and power 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, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the SMAJ36CA-M3/61 datasheet, SMAJ36CA-M3/61 pinout, SMAJ36CA-M3/61 application, or SMAJ36CA-M3/61 equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.61), MSL Level 1 moisture sensitivity, halogen-free RoHS compliance (M3 suffix), and DO-214AC package compatibility with automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under transient overvoltage events exceeding VWM, it avalanches rapidly to clamp the line voltage at ≤58.1 V while diverting surge current up to 6.9 A (10/1000 μs). Its bidirectional structure enables symmetric suppression without polarity dependency, making it suitable for AC-coupled or floating signal paths.
The device uses a glass-passivated silicon junction housed in an SMA (DO-214AC) package with matte tin-plated leads. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead); maximum operating junction temperature is +150 °C, with derating above 25 °C per Figure 2 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse working voltage before avalanche conduction begins; defines safe operating margin for protected circuitry. |
| VBR (min/max) | 40.0 V / 44.2 V at 1 mA - Breakdown voltage range confirming reliable turn-on threshold across process variation. |
| VC @ IPPM | 58.1 V at 6.9 A - Clamping voltage during 10/1000 μs surge; determines worst-case overvoltage seen by downstream ICs. |
| PPPM | 400 W - Peak pulse power handling capability; validates protection against IEC 61000-4-5 Level 3/4 surges when mounted on 5 mm × 5 mm copper pads. |
| IPPM | 6.9 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify layout survivability. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 2.54 mm lead pitch; compatible with JEDEC MS-013 and automated pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; no polarity marking for bidirectional types; meets UL 94 V-0 flammability rating and J-STD-020 MSL Level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (negative half-cycle) | Conducts during negative transients; forms symmetrical clamping path with cathode in bidirectional configuration. |
| Cathode | Transient current sink (positive half-cycle) | Conducts during positive transients; together with anode, provides full-cycle overvoltage clamping without external polarity constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded sensor outputs without polarity concerns. |
| 400 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications up to Level 4 (4 kV/2 Ω). |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes stress on protected ICs by limiting overvoltage excursion to <62% above rated working voltage. |
| Halogen-free & RoHS-compliant (M3 suffix) | Supports environmental compliance for global electronics manufacturing without compromising thermal or electrical performance. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profiles without baking, reducing production complexity and cost. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting wheel speed, pressure, or temperature sensors connected to ECU inputs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to clamp fast-rising spikes before reaching analog front-end or ADC input. Use Value: Prevents sensor signal corruption and ECU reset events by limiting transient voltage to ≤58.1 V during 100 A/50 ms load dump events. |
Use Scenario: Safeguarding RS-485 transceivers (e.g., THVD1550) in factory automation PLCs exposed to EFT/burst noise and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional line protector on A/B differential pair; clamps common-mode and differential transients simultaneously. Use Value: Maintains data integrity under IEC 61000-4-4 Level 4 (4 kV) EFT by holding bus voltage within transceiver's absolute maximum rating. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Surge protection on POTS or DSL line interface circuits in residential gateways subjected to induced lightning surges. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of GDT or MOV secondary protection; absorbs initial 10/1000 μs energy burst. Use Value: Reduces let-through voltage to <60 V, enabling use of lower-voltage-rated downstream filtering components and improving system MTBF. |
Use Scenario: Input-stage overvoltage clamp on 5 V/12 V DC adapter outputs feeding USB-C PD controllers or PMICs. IC Role / Device Role / Timing Role: Secondary-side transient suppressor guarding against back-EMF from switching regulators or hot-plug inrush. Use Value: Limits output rail overshoot to ≤58.1 V during 100 ns–1 μs transients, preventing latch-up or damage to sensitive 3.3 V logic rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs M3); identical MSL Level 1 and DO-214AC package. | No functional difference in protection performance; selected where halogen-free requirement is not mandated. | Choose SMAJ36CA-E3/61 for commercial-grade designs without halogen restrictions. |
| SMBJ36CA-M3 | Higher 600 W peak pulse power; larger SMB (DO-214AA) package; same VWM/VBR/VC ratings and bidirectional functionality. | Better suited for higher-energy surge environments (e.g., outdoor telecom cabinets); requires larger PCB footprint and different pad layout. | Choose SMBJ36CA-M3 when surge threat level exceeds 400 W or thermal dissipation demands greater copper area. |
Compared with SMAJ36CA-M3/61, SMAJ36CA-E3/61 offers identical protection with non-halogen-free construction, while SMBJ36CA-M3 delivers 50% higher surge capacity in a physically larger package - enabling trade-offs between board space, environmental compliance, and surge margin.
Availability
SMAJ36CA-M3/61 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 interfaces, and telecom line protection requiring stable component supply, halogen-free compliance, and MSL Level 1 reflow readiness.
Supply support for SMAJ36CA-M3/61 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and AEC-Q qualification.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and long-term stability under thermal cycling are critical.
FAQ
What is the clamping voltage of SMAJ36CA-M3/61 at its rated peak pulse current?
The SMAJ36CA-M3/61 has a maximum clamping voltage (VC) of 58.1 V at 6.9 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ36CA-M3/61 maintains this clamping performance across its full operating temperature range.
Is SMAJ36CA-M3/61 suitable for automotive applications?
Yes, SMAJ36CA-M3/61 is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes; however, the M3/61 variant is commercial-grade and not AEC-Q101 certified. For non-safety-critical automotive subsystems (e.g., body electronics, infotainment power rails), SMAJ36CA-M3/61 is widely used due to its +150 °C TJ max, MSL Level 1 reflow compatibility, and robust 400 W surge rating. Always verify qualification status via the specific ordering code.
How does the bidirectional design of SMAJ36CA-M3/61 affect its circuit placement?
The bidirectional design of SMAJ36CA-M3/61 eliminates polarity constraints - it can be placed across any two nodes requiring symmetrical overvoltage protection, such as differential signal pairs (RS-485 A/B), AC-coupled audio lines, or ungrounded sensor bridges. Unlike unidirectional TVS diodes, SMAJ36CA-M3/61 requires no orientation check during placement, simplifying layout and reducing assembly errors in high-volume SMT production.
What is the thermal resistance of SMAJ36CA-M3/61, and how does it impact PCB layout?
SMAJ36CA-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To maintain safe operation under repetitive surges, PCB layout must provide minimum 5.0 mm × 5.0 mm copper pads per terminal as specified in the datasheet. Reducing pad size increases RθJA, risking thermal runaway during sustained transient activity - especially critical in enclosed industrial enclosures.
Does SMAJ36CA-M3/61 meet UL recognition requirements?
Yes, SMAJ36CA-M3/61 carries Underwriters Laboratory Recognition under UL 497B (QVGQ2) for protector classification, with file number E136766 covering both unidirectional and bidirectional variants. This certification validates its suitability for use in primary and secondary circuits of telecommunications and data equipment where regulatory safety approval is required - including end-product listings for FCC Part 15 and EN 62368-1 compliance.
SMAJ36CA-M3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ36CA-M3/61 FAQ
1.How can I place an order for SMAJ36CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36CA-M3/61 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 SMAJ36CA-M3/61 reliable?
The price and inventory of SMAJ36CA-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ36CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36CA-M3/61?
SMAJ36CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36CA-M3/61 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 SMAJ36CA-M3/61?
For technical support, including SMAJ36CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ36CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ36CA-M3/61 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 SMAJ36CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ36CA-M3/61?
All SMAJ36CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36CA-M3/61, 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 SMAJ36CA-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ36CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ36CA-M3/61 Tags
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