My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6T15CAHM3/I
- Part No.:
- SM6T15CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15CAHM3/I.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,489
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6T15CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 15 V standoff voltage (VWM), 16.7 V minimum breakdown (VBR), 600 W peak pulse power (10/1000 μs), and 21.2 V maximum clamping voltage at 28 A IPPM. It protects signal lines and power rails in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the SM6T15CAHM3/I datasheet, SM6T15CAHM3/I pinout, SM6T15CAHM3/I application, or SM6T15CAHM3/I equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.27), and SMB thermal resistance (RθJA = 100 °C/W) under standard pad layout.
Technical Context
This bidirectional TVS operates symmetrically in both polarities with identical VBR (14.3–15.8 V), VC (21.2 V), and ID (1.0 μA max at 12.8 V) specifications. Its glass-passivated junction ensures stable leakage and robust surge handling without degradation over repeated 10/1000 μs pulses.
Designed for surface-mount automated placement, the device meets MSL Level 1 (260 °C reflow peak) and supports automotive-grade reliability via AEC-Q101 qualification-confirmed by HM3 suffix and "HM3_B/I" ordering code in Vishay's official documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working range for protected circuitry. |
| VBR min/max | 14.3 V / 15.8 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on during transients. |
| VC @ IPPM | 21.2 V - Clamped voltage at 28 A peak pulse (10/1000 μs); limits stress on downstream ICs like microcontrollers or CAN transceivers. |
| PPPM | 600 W - Peak pulse power handling capability; sustains high-energy surges common in automotive load-dump or inductive switch-off events. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Cathode band absent-bidirectional symmetry eliminates polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts surge current when voltage falls below -VBR; symmetrical with cathode for bidirectional clamping. |
| Cathode | Transient current entry (positive half-cycle) | Conducts surge current when voltage exceeds +VBR; functionally identical to anode due to bidirectional construction. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands high-energy transients from motor commutation or relay coil de-energization without failure. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules and ADAS sensor interfaces per stress-test requirements. |
| Low clamping ratio (VC/VBR ≈ 1.27) | Minimizes overvoltage exposure to protected ICs-critical for 3.3 V or 5 V logic interfacing with 12 V systems. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture-related popcorning or delamination risks. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, limiting transient excursions to ≤21.2 V. Use Value: Prevents latch-up or gate oxide damage in connected MCU ADC inputs and LIN transceivers during 100 V/50 ms load dump events. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-side surge coupling via long cable runs in factory automation. IC Role / Device Role / Timing Role: Fast-response shunt protector across 24 V DC input terminals, activated within nanoseconds of overvoltage onset. Use Value: Maintains functional safety integrity by ensuring input stage remains operational after repeated 1 kV/500 A surge injections per IEC 61000-4-5. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers in outdoor telecom equipment subjected to lightning-induced surges on data lines. IC Role / Device Role / Timing Role: Primary-level TVS mounted at connector entry point, clamping common-mode transients before reaching isolation barrier. Use Value: Enables compliance with ITU-T K.21 basic protection level (10/700 μs, 1 kV) without requiring secondary suppression stages. | Use Scenario: Suppressing output voltage spikes caused by transformer leakage inac-coupled AC/DC adapters powering USB-C PD or smart home hubs. IC Role / Device Role / Timing Role: Secondary-side bidirectional clamp across regulated 5 V or 9 V rail, absorbing ringing and overshoot during dynamic load steps. Use Value: Eliminates need for oversized output capacitors while maintaining ±5% regulation tolerance under 2 A step-load transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA | Same VWM (12.8 V), lower PPPM (400 W), SMA package (higher RθJA = 140 °C/W) | Limited to lower-energy transients; unsuitable for automotive load dump per ISO 16750-2 | Select only for cost-sensitive consumer applications with <400 W surge requirement and no AEC-Q101 mandate. |
| 1.5KE15CA | Higher VWM (12.8 V), same VC (21.2 V), but through-hole DO-15 package; 1500 W PPPM rating | Requires PCB real estate and wave-solder process; not compatible with SMT-only production | Choose when legacy board redesign is impractical and higher pulse energy margin is needed without changing layout. |
Compared with SMAJ15CA and 1.5KE15CA, SM6T15CAHM3/I delivers optimal balance of AEC-Q101 compliance, 600 W surge capacity, SMB footprint, and halogen-free materials-making it the preferred choice for new automotive and industrial SMT designs where reliability and regulatory alignment are mandatory.
Availability
SM6T15CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface circuits, and consumer power adapter outputs requiring stable component supply across multi-year production cycles.
Supply support for SM6T15CAHM3/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 reliability, efficiency, and application-specific performance.
The SM6T Series is engineered for robust transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where fast response, repeatable clamping, and AEC-Q101 validation are essential design requirements.
FAQ
What does the "HM3" suffix indicate in SM6T15CAHM3/I?
The "HM3" suffix in SM6T15CAHM3/I denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. It confirms compliance with automotive stress testing standards-including temperature cycling, humidity bias, and accelerated life testing-as documented in Vishay's official ordering information table for HM3_B/I tape-and-reel packaging.
Is SM6T15CAHM3/I unidirectional or bidirectional?
SM6T15CAHM3/I is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number and explicit specification in Vishay's SM6T datasheet: "For bidirectional devices use CA suffix (e.g. SM6T12CA)" and "Electrical characteristics apply in both directions." No polarity marking is present on the SMB package.
What is the maximum clamping voltage of SM6T15CAHM3/I at rated peak pulse current?
The maximum clamping voltage (VC) of SM6T15CAHM3/I is 21.2 V at 28 A peak pulse current (IPPM) under the standard 10/1000 μs waveform, per Vishay's Electrical Characteristics table on page 2 of document 88385. This value is measured with the device mounted on 0.2" × 0.2" copper pads per JEDEC guidelines.
Does SM6T15CAHM3/I meet automotive qualification standards?
Yes, SM6T15CAHM3/I meets AEC-Q101 qualification, explicitly stated in the "MECHANICAL DATA" section and reinforced by the "HM3" ordering code designation. Vishay confirms AEC-Q101 qualification applies to base P/NHM3_X variants, where "_X" denotes revision code-in this case "I" per the full part number SM6T15CAHM3/I.
What is the thermal resistance junction-to-ambient for SM6T15CAHM3/I?
The typical thermal resistance junction-to-ambient (RθJA) for SM6T15CAHM3/I is 100 °C/W, specified under "THERMAL CHARACTERISTICS" in Vishay's SM6T datasheet (document 88385, page 2). This value assumes mounting on 0.2" × 0.2" copper pads per JEDEC standard test conditions.
SM6T15CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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)
SM6T15CAHM3/I FAQ
1.How can I place an order for SM6T15CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15CAHM3/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 SM6T15CAHM3/I reliable?
The price and inventory of SM6T15CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T15CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM6T15CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15CAHM3/I?
SM6T15CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15CAHM3/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 SM6T15CAHM3/I?
For technical support, including SM6T15CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15CAHM3/I requirements.
6.How does Aetrix verify that SM6T15CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6T15CAHM3/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 SM6T15CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM6T15CAHM3/I?
All SM6T15CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15CAHM3/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 SM6T15CAHM3/I part is unused and in its original packaging.
Return procedure for SM6T15CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15CAHM3/I 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
