My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6T24AHM3/I
- Part No.:
- SM6T24AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24AHM3/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,461
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6T24AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 20.5 V stand-off voltage (VWM), 22.8–25.2 V breakdown voltage (VBR), and 33.2 V maximum clamping voltage (VC) at 18.0 A IPPM - used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial control systems.
For engineers reviewing the SM6T24AHM3/I datasheet, SM6T24AHM3/I pinout, SM6T24AHM3/I application, or SM6T24AHM3/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, 150 °C max junction temperature, and SMB footprint compatibility with automated SMT placement.
Technical Context
The SM6T24AHM3/I employs a glass-passivated silicon junction optimized for low-inductance transient suppression, with clamping action triggered when reverse voltage exceeds 22.8 V (min VBR) under 1 mA test current. Its thermal resistance (RθJA = 100 °C/W) and RθJL = 20 °C/W enable reliable operation up to 150 °C junction temperature under pulsed stress.
Designed for single-polarity protection, it features a cathode band marking, supports 100 A non-repetitive forward surge (IFSM), and meets J-STD-020 MSL Level 1 with 260 °C reflow peak - confirming suitability for high-volume automotive PCB assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 22.8 V / 25.2 V at 1.0 mA - ensures precise overvoltage threshold activation |
| VC @ IPPM | 33.2 V at 18.0 A (10/1000 μs) - limits protected circuit voltage during surge events |
| PPPM | 600 W - sustains high-energy transients common in automotive load-dump and inductive kick scenarios |
| TJ max. | +150 °C - enables deployment in under-hood automotive environments and industrial enclosures |
| Package | SMB (DO-214AA) - industry-standard 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint |
| AEC-Q101 | Qualified - validated for automotive-grade reliability per stress test requirements |
| RoHS | Halogen-free, RoHS-compliant (HM3 suffix) - meets EU Directive 2011/65/EU and JEDEC JS709E |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, 2-terminal device with cathode band marking on unidirectional variants. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); recommended pad layout: 5.59 mm × 2.18 mm copper pads per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference | Enables conduction path during surge clamp when cathode is at higher potential |
| Cathode | Marked end (band); reverse-bias voltage sensing node | Defines polarity-sensitive clamping direction - protects circuits referenced to cathode potential |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands high-energy transients from relay coil de-energization or motor commutation without degradation |
| Glass passivated chip junction | Ensures stable VBR and low leakage (<1.0 μA at VWM) across temperature and lifetime |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-bake requirement for SMT assembly, reducing manufacturing cost and cycle time |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units and body electronics modules |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or lightning-induced surges) |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protects microcontroller I/O pins and CAN transceiver power rails from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 12 V supply rail and ground, clamping surges above 20.5 V. Use Value: Limits rail voltage to ≤33.2 V during 600 W pulses, preventing latch-up or gate oxide damage in downstream logic and analog ICs. |
Use Scenario: Shields digital input optocouplers and level-shifting buffers from inductive kickback generated by solenoid valves and contactors. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC input channel, absorbing energy from 100 ms inductive turn-off spikes. Use Value: Maintains signal integrity by clamping transients within 10 ns response time while sustaining 100 A IFSM surge capability. |
| Automotive Sensor Signal Line | Consumer Appliance Motor Driver |
Use Scenario: Safeguards analog output of pressure/temperature sensors in ADAS camera modules against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF typical) placed directly at connector interface, cathode tied to sensor ground. Use Value: Clamps ±8 kV contact ESD (IEC 61000-4-2) to <33.2 V without distorting millivolt-level sensor signals. |
Use Scenario: Protects half-bridge gate drivers in washing machine motor inverters from cross-conduction-induced shoot-through voltage spikes. IC Role / Device Role / Timing Role: Rail-to-rail clamp on 300 V DC bus, suppressing dV/dt-induced false triggering during PWM switching transitions. Use Value: Enables robust operation at 150 °C ambient by maintaining clamping performance with <1.0 μA leakage at 20.5 V VWM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5B | Same VWM (20.5 V), VC = 38.9 V @ 15.4 A; SMA package (smaller footprint, higher RθJA = 150 °C/W) | Limited to lower-power consumer applications; not AEC-Q101 qualified | Select when board space is constrained and automotive qualification is unnecessary |
| SMCJ24A-HM3 | Higher PPPM (1500 W), same VWM/VC specs; larger SMC (DO-214AB) package; AEC-Q101 qualified | Suitable for higher-energy threats (e.g., ISO 7637-2 Pulse 1/2/5b); requires larger PCB area | Choose when system-level surge testing demands >600 W rating and SMC layout is acceptable |
Compared with SMAJ24A-E3/5B and SMCJ24A-HM3, the SM6T24AHM3/I delivers optimal balance of AEC-Q101 compliance, 600 W surge handling, SMB footprint, and halogen-free construction - making it ideal for space-constrained automotive modules where full SMC-level robustness is unnecessary.
Availability
SM6T24AHM3/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input protection, and consumer appliance motor driver development requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SM6T24AHM3/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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series was engineered for high-volume surface-mount transient protection in automotive, industrial, and computing systems - prioritizing AEC-Q101 qualification, low-profile packaging, and consistent clamping performance across temperature.
FAQ
What is the clamping voltage of SM6T24AHM3/I at its rated peak pulse current?
The SM6T24AHM3/I has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current (IPPM) of 18.0 A under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C and confirms the device's ability to limit transient overvoltages to a safe level for downstream components such as microcontrollers and interface ICs. The clamping performance remains stable across its operating temperature range up to +150 °C junction temperature.
Is SM6T24AHM3/I qualified for automotive applications?
Yes, SM6T24AHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix in its part number. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its reliability for under-hood and cabin-mounted automotive electronics. It is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces where sustained thermal and electrical robustness is required.
What does the "HM3" suffix signify in SM6T24AHM3/I?
The "HM3" suffix in SM6T24AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates AEC-Q101 qualification, "M" signifies halogen-free molding compound, and "3" confirms RoHS compliance per EU Directive 2011/65/EU. This distinguishes it from commercial-grade variants like SM6T24A-E3 (RoHS only) and SM6T24A-M3 (halogen-free, RoHS, no AEC-Q101).
How does SM6T24AHM3/I differ from bidirectional TVS diodes like SM6T24CA?
The SM6T24AHM3/I is unidirectional and features a cathode band marking, enabling protection only against reverse-polarity transients on positive rails. In contrast, SM6T24CA is bidirectional (no polarity marking) and suppresses transients of either polarity - suitable for AC lines or differential data buses. The SM6T24AHM3/I offers tighter leakage control (<1.0 μA at VWM) and is preferred for DC power rail protection where polarity is fixed and low leakage is critical.
What is the maximum junction temperature rating for SM6T24AHM3/I?
The SM6T24AHM3/I has a maximum junction temperature (TJ max.) of +150 °C, as specified in Vishay's official datasheet (Document Number: 88385). This rating allows reliable operation in high-ambient environments such as automotive engine compartments or enclosed industrial drives. Thermal derating curves confirm usable power dissipation down to 50% of rated PPPM at TJ = 125 °C, supporting robust thermal design without external heatsinking.
SM6T24AHM3/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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 18A
- 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)
SM6T24AHM3/I FAQ
1.How can I place an order for SM6T24AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24AHM3/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 SM6T24AHM3/I reliable?
The price and inventory of SM6T24AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24AHM3/I is usually 5 days.
3.What payment methods are accepted for SM6T24AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24AHM3/I?
SM6T24AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24AHM3/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 SM6T24AHM3/I?
For technical support, including SM6T24AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24AHM3/I requirements.
6.How does Aetrix verify that SM6T24AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6T24AHM3/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 SM6T24AHM3/I meets industry standards.
7.What is the process for return or replacement of SM6T24AHM3/I?
All SM6T24AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24AHM3/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 SM6T24AHM3/I part is unused and in its original packaging.
Return procedure for SM6T24AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24AHM3/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
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 …
