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Vishay General Semiconductor - Diodes Division SM6T27AHM3_A/I
- Part No.:
- SM6T27AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T27AHM3_A/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,549
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Product details
Overview
SM6T27AHM3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 37.5 V maximum clamping voltage (VC) at 16 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It protects MOSFETs and sensor signal lines in automotive ECUs against inductive switching transients.
For engineers reviewing the SM6T27AHM3_A/I datasheet, SM6T27AHM3_A/I pinout, SM6T27AHM3_A/I application, or SM6T27AHM3_A/I equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, SMB package thermal data, and direct alternative part comparisons for ESD and surge protection design-in.
Technical Context
The SM6T27AHM3_A/I operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable avalanche behavior under repetitive transient stress. Its 100 °C/W junction-to-ambient thermal resistance and 20 °C/W junction-to-lead resistance support reliable operation up to 150 °C junction temperature when mounted on 5.0 mm × 5.0 mm copper pads.
Designed per J-STD-020 MSL Level 1 (260 °C reflow peak), it delivers low-inductance transient response and meets halogen-free, RoHS-compliant material requirements. The "HM3" suffix confirms halogen-free construction and AEC-Q101 qualification-critical for automotive powertrain and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise avalanche onset window for repeatable clamping threshold |
| VWM | 23.1 V - maximum continuous reverse stand-off voltage before leakage exceeds 1 μA |
| VC @ IPPM | 37.5 V at 16 A (10/1000 μs) - limits protected circuit voltage during worst-case surge |
| PPPM | 600 W - peak transient power handling capacity under standardized surge waveform |
| TJ max. | +150 °C - enables use in under-hood automotive environments without derating below 125 °C ambient |
| RθJA | 100 °C/W - quantifies thermal bottleneck in standard PCB layout; requires minimum 5 mm² copper per pad |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when VIN > VBR |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a surges in 12 V automotive systems |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| MSL Level 1 (260 °C) | Enables single-pass lead-free reflow without popcorn cracking or delamination |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications requiring zero defects in safety-critical subsystems |
| Low inductance SMB package | Minimizes VL = L·di/dt overshoot during fast transients (< 1 ns rise time) |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protecting 5 V sensor supply rail from load-dump-induced transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor VDD and chassis ground. Use Value: Limits rail voltage to ≤37.5 V during 100 V/50 ms load dump, preventing damage to downstream LDOs and microcontrollers. | Use Scenario: Shielding RS-485 transceiver I/O pins from inductive kickback generated by 24 V solenoid switching. IC Role / Device Role / Timing Role: Point-of-entry transient suppressor on differential bus lines before ESD protection array. Use Value: Clamps 1 kV/1 A surge (IEC 61000-4-5) within 1 ns, preserving signal integrity and avoiding false logic states. |
| Consumer Appliance Power Supply | Telecom Base Station DC Feeder |
Use Scenario: Safeguarding primary-side controller ICs against flyback transformer leakage energy spikes. IC Role / Device Role / Timing Role: Snubber-connected TVS across MOSFET drain-source during turn-off. Use Value: Absorbs 600 W peak energy without degradation, extending MOSFET lifetime in 100 kHz SMPS designs. | Use Scenario: Mitigating lightning-induced surges on -48 V DC power feeders entering outdoor telecom cabinets. IC Role / Device Role / Timing Role: Primary-stage unidirectional suppressor upstream of DC/DC converters. Use Value: Withstands repeated 10/1000 μs surges up to 16 A while maintaining <1 μA leakage at 23.1 V operating voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ27A | Same VBR range (25.7–28.4 V), but lower PPPM = 400 W; SMA package (larger RθJA = 130 °C/W) | Not AEC-Q101 qualified; suitable only for commercial-grade industrial or consumer use | Select SMAJ27A only if automotive qualification is unnecessary and board space allows larger SMA footprint |
| SMCJ27A | Higher PPPM = 1500 W; SMC package (RθJA = 19 °C/W); same VBR, VC, and AEC-Q101 status | Requires larger PCB area and higher assembly cost; over-spec for most 600 W surge requirements | Choose SMCJ27A only when system-level testing demands >1000 W surge margin or extended thermal endurance |
Compared with SMAJ27A and SMCJ27A, the SM6T27AHM3_A/I uniquely balances AEC-Q101 compliance, 600 W capability, and compact SMB footprint-making it optimal for space-constrained automotive modules where qualification and thermal efficiency are jointly critical.
Availability
SM6T27AHM3_A/I is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive interfaces, and telecom DC feeder protection requiring stable component supply and full traceability.
Supply support for SM6T27AHM3_A/I 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 high-reliability and automotive-grade performance.
The SM6T Series is engineered specifically for transient overvoltage protection in harsh environments, targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 validation, and consistent clamping behavior are mandatory.
FAQ
What is the clamping voltage of the SM6T27AHM3_A/I under a 10/1000 μs surge?
The SM6T27AHM3_A/I has a maximum clamping voltage (VC) of 37.5 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 16 A. This value is measured per Figure 1 in Vishay Document 88385 and ensures protected circuits remain below critical voltage thresholds during standardized surge events. The SM6T27AHM3_A/I maintains this clamping performance across its full operating temperature range of −65 °C to +150 °C.
Is the SM6T27AHM3_A/I qualified for automotive applications?
Yes, the SM6T27AHM3_A/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its ordering code-indicating halogen-free, RoHS-compliant construction and full automotive reliability testing. It is approved for use in engine control units, body control modules, and ADAS sensors where failure modes must meet stringent automotive safety and longevity standards. The SM6T27AHM3_A/I undergoes temperature cycling, highly accelerated life testing, and ESD validation per AEC-Q101 requirements.
What does the "_A/I" suffix mean in SM6T27AHM3_A/I?
The "_A/I" suffix in SM6T27AHM3_A/I denotes the revision code and packaging configuration: "A" indicates the first revision of the HM3 variant, and "I" specifies 13-inch diameter plastic tape-and-reel delivery with 3200 units per reel. This matches Vishay's ordering convention in Document 88385, where "/I" corresponds to the preferred package code for high-volume automated assembly. The SM6T27AHM3_A/I is fully compatible with standard SMB pick-and-place equipment.
How does the SMB package of the SM6T27AHM3_A/I compare thermally to SMA or SMC packages?
The SMB (DO-214AA) package of the SM6T27AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads-higher than SMC (19 °C/W) but lower than SMA (130 °C/W). This makes the SM6T27AHM3_A/I a thermal compromise ideal for moderate-power surge protection where board space is constrained. Its RθJL of 20 °C/W further supports efficient heat conduction to PCB traces, unlike SMA which lacks defined lead thermal paths.
Can the SM6T27AHM3_A/I be used in bidirectional configurations?
No, the SM6T27AHM3_A/I is strictly unidirectional, as indicated by the "A" suffix (not "CA") and cathode-band marking. Bidirectional variants require the "CA" suffix (e.g., SM6T27CA), which have symmetrical breakdown in both polarities and no polarity marking. Using the SM6T27AHM3_A/I in reverse-biased AC signal paths would result in forward conduction and failure. For bidirectional protection, select SM6T27CAHM3_A/I or equivalent.
SM6T27AHM3_A/I 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:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T27AHM3_A/I FAQ
1.How can I place an order for SM6T27AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T27AHM3_A/I 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 SM6T27AHM3_A/I reliable?
The price and inventory of SM6T27AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T27AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T27AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T27AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T27AHM3_A/I?
SM6T27AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T27AHM3_A/I 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 SM6T27AHM3_A/I?
For technical support, including SM6T27AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T27AHM3_A/I requirements.
6.How does Aetrix verify that SM6T27AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T27AHM3_A/I 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 SM6T27AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T27AHM3_A/I?
All SM6T27AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T27AHM3_A/I, 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 SM6T27AHM3_A/I part is unused and in its original packaging.
Return procedure for SM6T27AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T27AHM3_A/I Tags
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