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Vishay General Semiconductor - Diodes Division SMAJ36A-M3/61
- Part No.:
- SMAJ36A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36A-M3/61.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
SMAJ36A-M3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. 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 on power rails and signal lines in automotive ECUs and industrial I/O modules.
For engineers reviewing the SMAJ36A-M3/61 datasheet, SMAJ36A-M3/61 pinout, SMAJ36A-M3/61 application, or SMAJ36A-M3/61 equivalent, this device delivers verified clamping performance, halogen-free RoHS compliance (M3 suffix), AEC-Q101 qualification readiness, and surface-mount compatibility with automated placement - critical for high-reliability DC power input protection and sensor interface surge hardening.
Technical Context
This unidirectional TVS diode operates as a fast-acting shunt clamp, activating within <1 ps to divert transient energy away from downstream circuitry when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable leakage (<1.0 μA at 36 V) and low incremental surge resistance, enabling consistent clamping under repetitive 0.01% duty cycle surges.
The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine), supports operating junction temperatures from –55 °C to +150 °C, and meets MSL Level 1 per J-STD-020 with 260 °C peak reflow profile - confirming suitability for lead-free SMT assembly in harsh-environment applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 36 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 36 V nominal systems. |
| VBR (Breakdown Voltage) | 40.0–44.2 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above system operating voltage with margin. |
| VC (Clamping Voltage) | 58.1 V at 6.9 A (10/1000 μs) - Measured maximum voltage seen by protected circuit during specified surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy handling capability under standard 10/1000 μs waveform; derated to 300 W above 78 V. |
| IPPM (Peak Pulse Current) | 6.9 A - Peak surge current the device safely clamps without failure; derived directly from VC and PPPM relationship. |
| TJmax | +150 °C - Maximum junction temperature rating; enables operation in under-hood automotive or enclosed industrial enclosures. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal design; supports automated pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, polarity indicated by cathode band on unidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-banded end is opposite) | Connected to ground or lower-potential rail; completes shunt path during reverse overvoltage events. |
| Cathode | Protected line connection (marked with band) | Connected to the line being protected (e.g., 36 V supply rail); reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 36 V DC inputs without derating. |
| 58.1 V clamping at 6.9 A | Limits transient overvoltage to ≤61% above VWM, safeguarding 40 V-rated MOSFETs and microcontrollers. |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance requirements for automotive and industrial OEMs without compromising thermal or electrical performance. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow soldering without moisture sensitivity concerns or pre-bake requirements. |
| AEC-Q101 qualification option | Base part SMAJ36A-HM3_X variant available for automotive-grade deployment; confirms reliability under temperature cycling and HTRB stress. |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protects 36 V battery-fed power rail in BCM against load dump transients up to ISO 7637-2 Pulse 5a (75 V, 100 ms). IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VIN and GND, clamping within sub-nanosecond response time. Use Value: Maintains VC ≤58.1 V during 6.9 A surge, preventing latch-up or gate oxide damage in upstream DC/DC controllers. |
Use Scenario: Shields 24–36 V digital input channels in programmable logic controllers from field-wiring induced surges (IEC 61000-4-4 EFT). IC Role / Device Role / Timing Role: Standoff-clamp protector on signal line, operating in reverse bias until transient exceeds VBR. Use Value: Limits voltage excursion to <58.1 V at 6.9 A, ensuring compatibility with 60 V-rated optocoupler input stages and FPGA I/O banks. |
| Telecom Remote Radio Unit (RRU) DC Feed Line | Consumer Appliance Motor Drive Board |
|
Use Scenario: Guards 36 V DC power feed to outdoor RRU equipment exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary front-end TVS on DC input, coordinated with secondary MOV/GDT stages in multi-stage protection network. Use Value: Provides precise 36 V standoff and repeatable 58.1 V clamping, reducing coordination margin needed vs. higher-VC alternatives. |
Use Scenario: Protects microcontroller GPIO and gate driver ICs on motor control boards from inductive kickback during BLDC commutation. IC Role / Device Role / Timing Role: Localized clamp across H-bridge high-side FET source-to-ground or supply rail. Use Value: Fast response and low VC prevent shoot-through or false triggering caused by >40 V transients on 36 V bus. |
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 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | Acceptable for commercial/industrial use where halogen-free requirement is not mandated. | Select SMAJ36A-E3/61 if environmental compliance only requires RoHS, not halogen-free specification. |
| SMAJ36CA-M3/61 | Bidirectional variant; symmetric VBR (40.0–44.2 V) in both directions; same VC, PPPM, package. | Required for AC-coupled or floating signal lines where polarity reversal occurs (e.g., RS-485, CAN FD). | Choose SMAJ36CA-M3/61 only when bidirectional protection is essential; unidirectional SMAJ36A-M3/61 offers lower leakage and simpler layout for DC rails. |
Compared with SMAJ36A-E3/61, the M3 suffix adds halogen-free compliance without electrical trade-offs; versus SMAJ36CA-M3/61, the unidirectional version provides tighter leakage control and avoids unnecessary bidirectional conduction in DC applications - optimizing reliability and board space.
Availability
SMAJ36A-M3/61 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, telecom remote radio units, and consumer appliance motor drive systems requiring stable component supply and halogen-free compliance.
Supply support for SMAJ36A-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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering standardized DO-214AC packaging, AEC-Q101 qualification paths, and precise clamping performance across 5.0 V to 188 V standoff ranges.
FAQ
What is the clamping voltage of SMAJ36A-M3/61 at its rated peak pulse current?
The SMAJ36A-M3/61 has a maximum clamping voltage (VC) of 58.1 V at 6.9 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream components remain within absolute maximum ratings. The SMAJ36A-M3/61 maintains this clamping performance across its full operating temperature range.
Is SMAJ36A-M3/61 suitable for automotive applications?
Yes - the SMAJ36A-M3/61 is qualified to AEC-Q101 when ordered with the HM3 suffix (e.g., SMAJ36A-HM3_A). While the base SMAJ36A-M3/61 is halogen-free and RoHS-compliant, it is rated for industrial and commercial use; automotive deployment requires the AEC-Q101 qualified variant. The SMAJ36A-M3/61 shares identical electrical characteristics and package with its automotive-grade counterpart, enabling seamless BOM migration.
How does the M3 suffix differ from E3 in SMAJ36A-M3/61?
The M3 suffix denotes halogen-free, RoHS-compliant construction, whereas E3 indicates RoHS-compliant but not halogen-free. Both share identical electrical specifications, thermal performance, and mechanical dimensions. The SMAJ36A-M3/61 meets stringent environmental mandates (e.g., IEC 61249-2-21) required by Tier 1 automotive suppliers and green industrial OEMs - making it the preferred choice where brominated flame retardants are prohibited.
What is the thermal resistance of SMAJ36A-M3/61, and how does it affect PCB layout?
The SMAJ36A-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤150 °C under continuous 3.3 W dissipation, designers must ensure adequate copper area and airflow. The SMAJ36A-M3/61's low RθJL supports efficient heat transfer through leads into PCB planes - a key advantage over smaller packages like SOD-123.
Can SMAJ36A-M3/61 be used in bidirectional signal protection?
No - SMAJ36A-M3/61 is strictly unidirectional and must be oriented with the cathode band toward the protected line. For bidirectional signal lines (e.g., RS-485, CAN, USB D+/D−), the SMAJ36CA-M3/61 variant is required. Using SMAJ36A-M3/61 on AC or polarity-agnostic signals risks forward conduction during negative excursions, potentially damaging the device or distorting signals. Always verify polarity alignment before placing SMAJ36A-M3/61 in circuit.
SMAJ36A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMAJ36A-M3/61 FAQ
1.How can I place an order for SMAJ36A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36A-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 SMAJ36A-M3/61 reliable?
The price and inventory of SMAJ36A-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 SMAJ36A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ36A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36A-M3/61?
SMAJ36A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36A-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 SMAJ36A-M3/61?
For technical support, including SMAJ36A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36A-M3/61 requirements.
6.How does Aetrix verify that SMAJ36A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ36A-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 SMAJ36A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ36A-M3/61?
All SMAJ36A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36A-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 SMAJ36A-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ36A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ36A-M3/61 Tags
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