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Vishay General Semiconductor - Diodes Division SMCJ36A-M3/57T
- Part No.:
- SMCJ36A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ36A-M3/57T.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,046
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Product details
Overview
SMCJ36A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 36 V standoff voltage (VWM), 40.0–44.2 V breakdown range at 1 mA, 58.1 V clamping voltage at 25.8 A peak pulse current (10/1000 µs), and 1500 W peak pulse power rating - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ36A-M3/57T datasheet, SMCJ36A-M3/57T pinout, SMCJ36A-M3/57T application, or SMCJ36A-M3/57T equivalent, this page delivers verified electrical parameters, thermal derating behavior, polarity marking convention, halogen-free RoHS compliance status, and AEC-Q101 qualification path - all critical for ESD/surge protection design validation and automotive BOM selection.
Technical Context
The SMCJ36A-M3/57T operates as a unidirectional avalanche diode with cathode-band polarity marking, optimized for clamping fast transients induced by inductive switching or lightning surges. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while its M3 suffix confirms halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance.
Thermally, it exhibits RθJA = 75 °C/W (typ.) on standard 8.0 mm × 8.0 mm copper pads and supports continuous operation from −55 °C to +150 °C junction temperature. Derating above 25 °C ambient follows Fig. 2 in the datasheet, maintaining 1500 W PPPM capability only at TA ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line voltage. |
| VBR @ IT = 1 mA | 40.0–44.2 V - guaranteed avalanche initiation range; defines minimum clamping onset threshold under test conditions. |
| VC @ IPPM = 25.8 A | 58.1 V - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - peak pulse power handling capacity; enables protection against high-energy transients per ISO 7637-2 Pulse 1/2/5a. |
| IPPM | 25.8 A - corresponding peak surge current at VC; used to size PCB trace width and verify layout survivability. |
| TJ max. | +150 °C - maximum junction temperature; constrains thermal design margin when mounted on minimal copper area. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
SMCJ36A-M3/57T uses the SMC (DO-214AB) package: a two-terminal, surface-mount plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Polarity is marked by a cathode band on the body end - the banded terminal is the cathode (anode is unmarked). No internal die bonding variation affects terminal assignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased anode connection point | Connected to protected line (e.g., +12 V rail); conducts during overvoltage to shunt surge current to ground. |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping path during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction (M3 suffix) | Meets environmental compliance requirements for automotive and industrial end equipment without compromising surge robustness. |
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy transients common in 12 V/24 V vehicle power systems and industrial motor drives. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or damage to downstream logic-level components. |
| MSL Level 1 moisture sensitivity | Enables standard reflow assembly without dry-pack or baking, simplifying manufacturing logistics. |
| AEC-Q101 qualification path available | Supports automotive-grade sourcing via HM3 suffix variants; SMCJ36A-M3/57T itself is commercial-grade but shares identical die and package. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator ripple-induced spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients before they reach LDOs or microcontrollers. Use Value: Limits peak voltage to 58.1 V during 25.8 A surge, preventing permanent damage to 3.3 V/5 V logic supplies downstream. | Use Scenario: Shielding analog outputs of pressure or temperature sensors from ESD events and cable-induced noise in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS installed across differential signal pairs (e.g., 4–20 mA loop) to absorb fast-rising electrostatic discharges. Use Value: Clamps sub-100 ns ESD pulses to <58.1 V without distorting millivolt-level sensor signals due to minimal junction capacitance (~100 pF at 0 V). |
| DC-DC Converter Input Stage | Telecom Power Interface Protection |
Use Scenario: Safeguarding input stage of isolated 48 V-to-12 V DC-DC converters in telecom infrastructure against lightning-induced surges on primary-side traces. IC Role / Device Role / Timing Role: Primary-side TVS connected between HV input and ground, absorbing energy before it reaches MOSFET gate drivers or controller ICs. Use Value: Handles 1500 W surge energy with <1 ns response time, preserving converter reliability under repeated transient stress. | Use Scenario: Protecting PoE-powered device inputs (IEEE 802.3af/at) from surges entering via Ethernet cables in outdoor access points. IC Role / Device Role / Timing Role: Unidirectional TVS placed on each DC input line (VDD, RETURN) to clamp common-mode transients before reaching PD interface ICs. Use Value: Maintains 36 V working voltage margin above 44 V PoE nominal, enabling safe operation during sustained overvoltage conditions. |
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-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VC specs. | Not suitable for high-energy surges like load dump; limited to consumer-grade signal-line protection. | Select when board space is constrained and surge threat level is low (e.g., USB port ESD only). |
| SMCJ36CA-M3/57T | Bidirectional variant with identical VWM, VBR, and VC, no polarity marking, symmetric clamping in both directions. | Required for AC-coupled or floating signal lines where reverse polarity transients occur (e.g., RS-485 bus). | Choose for bidirectional protection needs; not interchangeable without circuit redesign due to polarity and grounding implications. |
Compared with SMAJ36A-E3/57T and SMCJ36CA-M3/57T, the SMCJ36A-M3/57T provides the highest surge energy handling in a standardized SMC footprint, making it optimal for automotive and industrial DC power rail protection where 1500 W capability and halogen-free compliance are mandatory.
Availability
SMCJ36A-M3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom power interfaces requiring stable component supply, halogen-free compliance, and high-reliability transient suppression.
Supply support for SMCJ36A-M3/57T 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 performance.
The SMCJ series is engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against ISO 7637-2 and IEC 61000-4-5 threats is essential.
FAQ
What is the clamping voltage of the SMCJ36A-M3/57T under a 10/1000 µs surge?
The SMCJ36A-M3/57T has a maximum clamping voltage (VC) of 58.1 V at 25.8 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions defined in ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024. The SMCJ36A-M3/57T maintains this clamping performance across its rated junction temperature range when mounted per recommended pad layout.
Is the SMCJ36A-M3/57T suitable for automotive applications?
The SMCJ36A-M3/57T is a commercial-grade part with halogen-free RoHS compliance (M3 suffix), but it is not AEC-Q101 qualified. However, Vishay offers the functionally identical HM3-suffix variant (e.g., SMCJ36A-HM3/57T) that is AEC-Q101 qualified and shares the same die and SMC package. For automotive use, specify the HM3 version; the SMCJ36A-M3/57T may be used in non-safety-critical prototype or aftermarket designs where qualification is not mandated.
How does the M3 suffix differ from the E3 suffix in SMCJ36A-M3/57T?
The M3 suffix indicates halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, while E3 denotes standard RoHS compliance without halogen-free assurance. Both meet UL 94 V-0 flammability and have identical electrical specifications and SMC package dimensions. The SMCJ36A-M3/57T is preferred for environmentally regulated markets including EU automotive and industrial equipment where halogen content restrictions apply.
What is the thermal resistance of the SMCJ36A-M3/57T, and how does it affect layout?
The SMCJ36A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This value assumes minimum recommended pad layout per datasheet Fig. 5; reducing copper area increases RθJA, accelerating thermal derating. For sustained surge duty cycles, designers must verify junction temperature stays below +150 °C using this RθJA and actual power dissipation - the SMCJ36A-M3/57T cannot sustain 1500 W beyond 25 °C ambient without derating.
Can the SMCJ36A-M3/57T be used in bidirectional signal protection?
No - the SMCJ36A-M3/57T is strictly unidirectional, with polarity marked by a cathode band. Using it on AC or floating lines risks forward conduction during negative half-cycles, causing failure or incorrect clamping. For bidirectional protection, select the SMCJ36CA-M3/57T, which has symmetrical breakdown in both directions and no polarity marking. The SMCJ36A-M3/57T must be oriented with cathode toward the protected positive rail and anode to ground.
SMCJ36A-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 25.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SMCJ36A-M3/57T FAQ
1.How can I place an order for SMCJ36A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ36A-M3/57T 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 SMCJ36A-M3/57T reliable?
The price and inventory of SMCJ36A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ36A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ36A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ36A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ36A-M3/57T?
SMCJ36A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ36A-M3/57T 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 SMCJ36A-M3/57T?
For technical support, including SMCJ36A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ36A-M3/57T requirements.
6.How does Aetrix verify that SMCJ36A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ36A-M3/57T 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 SMCJ36A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ36A-M3/57T?
All SMCJ36A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ36A-M3/57T, 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 SMCJ36A-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ36A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ36A-M3/57T Tags
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