My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6T39A-M3/52
;;2.jpg)
- Part No.:
- SM6T39A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T39A-M3/52.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,251
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6T39A-M3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR at 1 mA), 53.9 V max clamping voltage (VC) at 11.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the SM6T39A-M3/52 datasheet, SM6T39A-M3/52 pinout, SM6T39A-M3/52 application, or SM6T39A-M3/52 equivalent, key selection criteria include unidirectional polarity, halogen-free RoHS-compliant construction (M3 suffix), AEC-Q101 qualification eligibility via HM3 variant, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
The SM6T39A-M3/52 operates as a unidirectional avalanche diode with glass-passivated junction, delivering precise clamping during fast-rising ESD or inductive-switching transients. Its low-inductance SMB package and 20 °C/W junction-to-lead thermal resistance support reliable energy dissipation under repetitive surge conditions up to 150 °C junction temperature.
It complies with J-STD-020 MSL Level 1 (260 °C peak reflow), uses matte tin-plated leads solderable per JESD 22-B102, and meets UL 94 V-0 flammability requirements. The cathode band marking enables unambiguous orientation during PCB assembly and ensures correct polarity-dependent clamping behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33.3 V - Maximum continuous reverse voltage before leakage exceeds 1 μA; defines operating margin below clamping threshold |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events |
| VC (Clamping) | 53.9 V at 11.1 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case transient; limits stress on downstream ICs |
| PPPM | 600 W - Surge energy handling capacity with standardized waveform; supports robust protection in automotive load-dump scenarios |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient; informs derating above 25 °C ambient for sustained reliability |
| TJ max | +150 °C - Maximum allowable junction temperature; enables operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" × 0.130" footprint; compatible with IPC-7351B standard land patterns |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, cathode indicated by a band on the body. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); weight 0.106 g; UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-biased side) | Connected to lower-potential node (e.g., ground or return path); completes clamping path during reverse transient |
| Cathode | Avalanche conduction terminal (marked end) | Connected to higher-potential line (e.g., 24 V supply or signal rail); initiates clamping when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 5a) without degradation when mounted per recommended pad layout |
| Glass-passivated junction | Ensures stable VBR and low leakage over temperature and lifetime; eliminates risk of junction corrosion in humid environments |
| MSL Level 1 rating | Permits single-reflow assembly without moisture sensitivity concerns; eliminates bake requirement prior to SMT processing |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance mandates for automotive and industrial OEMs; supports green manufacturing and end-of-life recycling |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to protected devices; critical for safeguarding 3.3 V or 5 V logic interfaces |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and ground, activated within nanoseconds of overvoltage onset. Use Value: Limits transient voltage to ≤53.9 V, preventing latch-up or gate oxide damage in connected microcontrollers and signal conditioners. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring surges and relay contact bounce in factory automation. IC Role / Device Role / Timing Role: Standoff-mode protector on 24 V DC input channels, conducting only during >33.3 V excursions. Use Value: Maintains system uptime by absorbing 600 W pulses without failure, meeting IEC 61000-4-5 Level 3 immunity requirements. |
| Consumer Power Adapter ESD Guard | Telecom Line Interface Protection |
Use Scenario: Secondary-side transient suppression on USB-C PD adapter output rails exposed to user-handling ESD and hot-plug events. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp referenced to common ground, placed adjacent to connector. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <54 V within <1 ns, preserving USB PD controller integrity. |
Use Scenario: Overvoltage protection on Ethernet PHY power rails and auxiliary bias lines in VoIP gateways and base stations. IC Role / Device Role / Timing Role: Standby-mode TVS on +3.3 V or +5 V supply nets feeding sensitive transceivers. Use Value: Withstands repeated 10/1000 μs surges up to 11.1 A while maintaining <1 μA leakage at 33.3 V - ensuring low standby power impact. |
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-E3/52 | Same SMB package; 36 V VWM, 40–44.4 V VBR, 58.1 V VC at 10.3 A; 400 W PPPM | Lower peak power rating; suitable for less severe surge environments (e.g., consumer-grade USB ports) | Select when cost sensitivity outweighs need for full 600 W capability and tighter clamping ratio |
| SMCJ36A-M3/52 | Higher-power SMC (DO-214AB) package; same 36 V VWM; 58.1 V VC at 17.3 A; 1500 W PPPM | Larger footprint (7.11 mm × 6.22 mm); requires more PCB area but handles heavier industrial transients | Choose for applications demanding >600 W surge margin (e.g., motor drive control boards) where board space permits |
Compared with SMAJ36A-E3/52 and SMCJ36A-M3/52, the SM6T39A-M3/52 delivers optimal balance of 600 W surge capability, compact SMB footprint, and halogen-free compliance - making it preferred for space-constrained automotive and industrial modules requiring AEC-Q101-qualified variants.
Availability
SM6T39A-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line card protection requiring stable component supply across extended production lifecycles.
Supply support for SM6T39A-M3/52 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 SM6T Series was engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping behavior and long-term stability under thermal cycling are critical.
FAQ
What is the polarity configuration of SM6T39A-M3/52?
The SM6T39A-M3/52 is a unidirectional transient voltage suppressor diode. Its cathode is marked by a visible band on the SMB package body, and it conducts only when the anode is at a lower potential than the cathode - enabling precise clamping on positive-going transients relative to ground. This polarity must be observed during PCB layout to ensure correct protection function.
Does SM6T39A-M3/52 meet automotive qualification standards?
The SM6T39A-M3/52 itself is halogen-free and RoHS-compliant (M3 suffix), but AEC-Q101 qualification applies only to variants with HM3 or HE3 suffixes (e.g., SM6T39AHM3_X). For automotive use, specify SM6T39AHM3/52 and verify revision code compliance per Vishay's qualified parts list - the M3/52 version is commercial-grade unless explicitly ordered with HM3.
What is the maximum clamping voltage of SM6T39A-M3/52 under standard test conditions?
The SM6T39A-M3/52 has a maximum clamping voltage (VC) of 53.9 V when subjected to a 10/1000 μs waveform at 11.1 A peak pulse current (IPPM). This value is measured per Fig. 1 and Fig. 3 of Vishay document 88385 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can SM6T39A-M3/52 be used in bidirectional protection applications?
No - SM6T39A-M3/52 is strictly unidirectional. For bidirectional transient suppression, Vishay specifies the CA-suffix variant (e.g., SM6T39CA-M3/52), which lacks polarity marking and clamps symmetrically for both polarities. Using SM6T39A-M3/52 in bidirectional configurations risks failure during negative transients due to forward conduction limits.
What is the thermal resistance and how does it affect SM6T39A-M3/52 derating?
The SM6T39A-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W under standard mounting conditions (0.2" × 0.2" copper pads). Above 25 °C ambient, its peak pulse power must be linearly derated per Fig. 2 in document 88385 - e.g., at 85 °C ambient, usable PPPM drops to ~60% of 600 W, requiring careful thermal design in enclosed enclosures.
SM6T39A-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 11.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T39A-M3/52 FAQ
1.How can I place an order for SM6T39A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T39A-M3/52 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 SM6T39A-M3/52 reliable?
The price and inventory of SM6T39A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T39A-M3/52 is usually 5 days.
3.What payment methods are accepted for SM6T39A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T39A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T39A-M3/52?
SM6T39A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T39A-M3/52 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 SM6T39A-M3/52?
For technical support, including SM6T39A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T39A-M3/52 requirements.
6.How does Aetrix verify that SM6T39A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T39A-M3/52 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 SM6T39A-M3/52 meets industry standards.
7.What is the process for return or replacement of SM6T39A-M3/52?
All SM6T39A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T39A-M3/52, 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 SM6T39A-M3/52 part is unused and in its original packaging.
Return procedure for SM6T39A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T39A-M3/52 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
