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Vishay General Semiconductor - Diodes Division SM6T27A-M3/5B
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- Part No.:
- SM6T27A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27A-M3/5B.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,143
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Product details
Overview
SM6T27A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, with 27 V breakdown voltage (VBR = 25.7–28.4 V at 1.0 mA), 23.1 V stand-off voltage (VWM), 37.5 V clamping voltage (VC) at 16.0 A peak pulse current, and 600 W peak pulse power rating (10/1000 μs). It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM6T27A-M3/5B datasheet, SM6T27A-M3/5B pinout, SM6T27A-M3/5B application, or SM6T27A-M3/5B equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, halogen-free RoHS compliance (M3 suffix), and SMB package thermal resistance (RθJA = 100 °C/W).
Technical Context
The SM6T27A-M3/5B operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (25.7–28.4 V), then clamping transient energy to ≤37.5 V at 16.0 A. Its glass-passivated junction ensures stable leakage (<1.0 μA at 23.1 V) and low inductance for fast response.
Designed for surface-mount assembly on 0.2" × 0.2" copper pads, it delivers 600 W peak pulse power per JEDEC-standard 10/1000 μs waveform while maintaining junction temperature ≤150 °C and meeting MSL Level 1 (260 °C reflow peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - defines precise avalanche initiation window for reliable overvoltage triggering |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 37.5 V at 16.0 A (10/1000 μs) - clamping voltage limiting downstream IC stress during surge events |
| PPPM | 600 W - peak transient power handling capacity under standardized surge waveform |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C ambient |
| TJmax | +150 °C - maximum allowable junction temperature, supporting operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 0.220" body length and matte tin-plated leads |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with cathode band marking on one end; terminals are matte tin-plated leads compliant with J-STD-002 solderability and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient conduction path during overvoltage | Reverse-biased terminal that avalanches to clamp voltage; must connect to protected line |
| Anode (unmarked end) | Reference/return path | Connects to ground or lower-potential rail; completes current path during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a transients in 12 V automotive systems |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage stress on downstream MOSFET gates or IC inputs during surge events |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets automotive OEM material compliance requirements without compromising surge performance |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning or special handling |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 μA) across temperature and lifetime |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Inputs |
|---|---|
|
Use Scenario: Protecting Hall-effect and crankshaft position sensors from load-dump and inductive kickback in engine control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp transients before reaching analog front-end. Use Value: Clamps 16.0 A surges to ≤37.5 V, preventing latch-up or gate oxide damage in 5 V or 12 V sensor interface ICs. |
Use Scenario: Safeguarding PLC digital input terminals connected to 24 V DC solenoids and relays subject to switching transients. IC Role / Device Role / Timing Role: Standoff protection device mounted directly at connector entry point to shunt inductive energy before entering isolation barrier. Use Value: Withstands repeated 600 W pulses without degradation, enabling >100,000 cycle reliability in factory automation systems. |
| Consumer Power Adapter Outputs | Telecom Line Interface Circuits |
|
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V USB-C PD adapter outputs exposed to ESD and cable-connect transients. IC Role / Device Role / Timing Role: Fast-response clamping diode placed after DC-DC converter output filter to protect downstream USB port controllers. Use Value: Low 100 °C/W RθJA allows self-heating <5 °C rise at 5 W dissipation, avoiding thermal shutdown during intermittent surges. |
Use Scenario: Surge protection on RS-485 transceiver bus lines in base station backhaul equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair, coordinated with GDT or MOV for multi-stage protection architecture. Use Value: 37.5 V clamping voltage aligns with ±12 V RS-485 common-mode range, preserving signal integrity during 1 kV/1.2×50 μs transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A | Higher VBR (26.6–29.4 V), same SMB package, 400 W PPPM, non-AEC-Q101 | Limited to commercial-grade industrial use; lacks halogen-free certification and automotive qualification | Select SMAJ28A only for cost-sensitive non-automotive designs where 400 W surge margin suffices |
| 1.5SMC27A | Same VBR range, higher PPPM (1500 W), larger SMC (DO-214AB) package, 1.5× footprint area | Requires PCB layout change; suited for high-energy transients where SMB thermal limits are exceeded | Choose 1.5SMC27A when system-level testing shows >600 W surge exposure or extended thermal cycling is required |
Compared with SMAJ28A and 1.5SMC27A, the SM6T27A-M3/5B uniquely balances automotive qualification (AEC-Q101 optional), halogen-free compliance, SMB footprint, and 600 W capability-making it optimal for space-constrained, thermally managed, and OEM-compliant designs.
Availability
SM6T27A-M3/5B is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC inputs, and consumer power adapter outputs requiring stable component supply with halogen-free, RoHS-compliant sourcing.
Supply support for SM6T27A-M3/5B 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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SM6T Series was developed specifically for surface-mount transient suppression in space-constrained automotive and industrial electronics, prioritizing low clamping voltage, repeatable avalanche behavior, and MSL Level 1 manufacturability.
FAQ
What is the clamping voltage of SM6T27A-M3/5B at its rated peak pulse current?
The SM6T27A-M3/5B has a maximum clamping voltage (VC) of 37.5 V at 16.0 A peak pulse current under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88385 and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6T27A-M3/5B maintains this clamping performance across its qualified operating temperature range.
Is SM6T27A-M3/5B qualified for automotive applications?
The SM6T27A-M3/5B is halogen-free and RoHS-compliant (M3 suffix) but is not AEC-Q101 qualified by default. Automotive qualification requires the HM3 suffix variant (e.g., SM6T27AHM3_B/I). The SM6T27A-M3/5B remains suitable for non-safety-critical automotive subsystems where full AEC-Q101 is not mandated, such as infotainment power rails or body control module sensor interfaces.
What does the "M3/5B" suffix indicate in SM6T27A-M3/5B?
The "M3" suffix denotes halogen-free, RoHS-compliant construction; "5B" specifies packaging in 13-inch diameter plastic tape and reel with 3200 units per reel. This configuration supports high-volume automated placement and meets IPC/JEDEC standards for moisture sensitivity (MSL Level 1). The SM6T27A-M3/5B is fully compatible with standard SMT reflow profiles up to 260 °C peak.
How does SM6T27A-M3/5B differ from bidirectional TVS diodes like SM6T27CA?
The SM6T27A-M3/5B is unidirectional and features a cathode band for polarity identification, allowing it to conduct only during reverse overvoltage events. In contrast, SM6T27CA is bidirectional with no polarity marking and suppresses transients in both directions. The SM6T27A-M3/5B is selected for DC-biased lines (e.g., 12 V power rails), whereas SM6T27CA suits AC-coupled or differential signal paths like RS-485.
What is the maximum junction temperature rating for SM6T27A-M3/5B?
The SM6T27A-M3/5B has a maximum junction temperature (TJmax) of +150 °C, as specified in Vishay document 88385. This rating enables operation in under-hood automotive environments and high-temperature industrial enclosures. Derating begins above 25 °C ambient per Figure 2, with thermal resistance RθJA = 100 °C/W on standard 0.2" × 0.2" copper pads.
SM6T27A-M3/5B 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 16A
- 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)
SM6T27A-M3/5B FAQ
1.How can I place an order for SM6T27A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27A-M3/5B 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 SM6T27A-M3/5B reliable?
The price and inventory of SM6T27A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T27A-M3/5B is usually 5 days.
3.What payment methods are accepted for SM6T27A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27A-M3/5B?
SM6T27A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27A-M3/5B 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 SM6T27A-M3/5B?
For technical support, including SM6T27A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27A-M3/5B requirements.
6.How does Aetrix verify that SM6T27A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T27A-M3/5B 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 SM6T27A-M3/5B meets industry standards.
7.What is the process for return or replacement of SM6T27A-M3/5B?
All SM6T27A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27A-M3/5B, 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 SM6T27A-M3/5B part is unused and in its original packaging.
Return procedure for SM6T27A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27A-M3/5B Tags
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