My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6T22AHM3_A/I
- Part No.:
- SM6T22AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22AHM3_A/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,145
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6T22AHM3_A/I 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 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 30.6 V maximum clamping voltage (VC) at 20 A peak pulse current, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T22AHM3_A/I datasheet, SM6T22AHM3_A/I pinout, SM6T22AHM3_A/I application, or SM6T22AHM3_A/I equivalent, key selection criteria include unidirectional polarity, 18.8 V stand-off voltage (VWM), 1.0 μA max reverse leakage at VWM, 150 °C max junction temperature, and halogen-free, RoHS-compliant construction with M3 suffix.
Technical Context
The SM6T22AHM3_A/I operates as a unidirectional clamping device with glass passivated junction, optimized for fast response to ESD and surge events. Its low inductance and MSL Level 1 rating support reliable reflow soldering in automated SMT assembly.
It delivers 600 W peak pulse power handling per 10/1000 μs waveform, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling robust transient suppression in space-constrained PCB layouts without heatsinking under defined pad conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise clamping onset threshold for overvoltage protection |
| VWM | 18.8 V - maximum continuous reverse operating voltage before significant leakage |
| VC @ IPPM | 30.6 V at 20 A - clamped voltage during 600 W transient, limiting stress on downstream ICs |
| PPPM | 600 W (10/1000 μs) - surge energy absorption capability compatible with IEC 61000-4-5 Level 3 |
| IR @ VWM | ≤1.0 μA - ensures negligible standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - supports operation in under-hood automotive environments and industrial enclosures |
| Package | SMB (DO-214AA) - standardized surface-mount footprint with 5.59 mm × 4.06 mm body and 2.20 mm height |
Pinout & Package
SMB (DO-214AA) package with cathode band marking on unidirectional devices; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected circuit ground or low-side return path in clamp configuration |
| Cathode | Current exit terminal; marked with band | Connected to line being protected (e.g., 12 V rail or sensor output); reverse-biased during surge |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Halogen-free & RoHS-compliant | M3 suffix confirms compliance with JEDEC JS709E and EU RoHS Directive 2011/65/EU |
| 600 W peak pulse power | Withstands 10/1000 μs surges up to 20 A without degradation, meeting ISO 7637-2 Pulse 1/2a/3a requirements |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes voltage overshoot during transients, reducing risk of latch-up or damage to 24 V-rated ICs |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load dump and alternator ripple transients on 12 V/24 V vehicle power distribution networks. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ECUs, ABS modules, or lighting controllers. Use Value: Clamps spikes to ≤30.6 V, preventing damage to 36 V-rated regulators and CAN transceivers while maintaining AEC-Q101 compliance. | Use Scenario: Protecting analog outputs (e.g., 4–20 mA, 0–5 V) of pressure or temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Standoff-connected TVS on sensor signal lines to absorb ESD and inductive kickback from nearby solenoids. Use Value: 1.0 μA leakage at 18.8 V preserves measurement accuracy; 30.6 V clamping prevents ADC input saturation during 2 kV ESD events. |
| Telecom DC Power Input Protection | Consumer USB Power Delivery Line Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras, access points) against surges on 48 V DC input rails. IC Role / Device Role / Timing Role: Primary surge clamp on secondary-side DC bus upstream of DC/DC converters. Use Value: 600 W rating handles IEC 61000-4-5 Combination Wave (1.2/50 μs + 8/20 μs) surges; SMB footprint enables dense layout near connectors. | Use Scenario: Adding secondary-level surge immunity to USB-C PD ports in laptops and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS line to limit overvoltage during hot-plug or cable fault events. Use Value: 22 V VBR aligns with 20 V PD 3.0 max, while 30.6 V VC stays below 36 V absolute maximum ratings of common PD controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5B | Same VBR range (20.9–23.1 V), but 400 W PPPM; SMA package (smaller, higher RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump | Select when board space is critical and surge threat level is IEC 61000-4-2 only |
| SMCJ22A-HM3_A/I | Same VBR and VC, but 1500 W PPPM; larger SMC (DO-214AB) package | Overqualified for most 24 V systems; requires more PCB area | Select when protecting against ISO 7637-2 Pulse 5a (load dump) with >100 V spikes |
Compared with SMAJ22A-E3/5B and SMCJ22A-HM3_A/I, the SM6T22AHM3_A/I offers optimal balance of 600 W surge capacity, AEC-Q101 qualification, and compact SMB footprint-making it ideal for cost-sensitive, space-constrained automotive and industrial 24 V designs where full SMCJ-level ruggedness is unnecessary.
Availability
SM6T22AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power inputs, and consumer USB PD protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SM6T22AHM3_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 reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, halogen-free compliance, and consistent clamping performance are mandatory.
FAQ
What is the polarity configuration of SM6T22AHM3_A/I?
The SM6T22AHM3_A/I is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the SMB package body, and it conducts only when the cathode is at a higher potential than the anode-making it suitable for DC rail protection where polarity is fixed. This differs from bidirectional variants (e.g., SM6T22CA) used in AC or differential signal lines.
Does SM6T22AHM3_A/I meet automotive qualification standards?
Yes, SM6T22AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SM6T series datasheet (Doc. #88385, Rev. 09-Jan-2024). It undergoes stress testing including temperature cycling, high-temperature reverse bias, and ESD per the AEC-Q101 standard, making it approved for use in automotive powertrain, body, and infotainment systems.
What is the maximum clamping voltage of SM6T22AHM3_A/I under surge conditions?
The SM6T22AHM3_A/I has a maximum clamping voltage (VC) of 30.6 V at 20 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in the official datasheet and represents the upper voltage limit imposed on protected circuitry during a 600 W transient event.
How does the SMB package of SM6T22AHM3_A/I compare to SMA or SMC in thermal performance?
The SMB (DO-214AA) package of SM6T22AHM3_A/I provides a thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead) when mounted on 5.0 mm × 5.0 mm copper pads. This is superior to SMA (RθJA ≈ 140 °C/W) but less efficient than SMC (RθJA ≈ 65 °C/W), positioning SMB as a balanced choice for moderate-power surge protection without requiring extra board area.
Is SM6T22AHM3_A/I halogen-free and RoHS-compliant?
Yes, SM6T22AHM3_A/I carries the "M3" suffix, which Vishay specifies as halogen-free and RoHS-compliant per JEDEC JS709E and EU Directive 2011/65/EU. The molding compound meets UL 94 V-0 flammability rating, and terminals are matte tin plated per J-STD-002, confirming full environmental compliance for global electronics manufacturing.
SM6T22AHM3_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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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)
SM6T22AHM3_A/I FAQ
1.How can I place an order for SM6T22AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22AHM3_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 SM6T22AHM3_A/I reliable?
The price and inventory of SM6T22AHM3_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 SM6T22AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T22AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22AHM3_A/I?
SM6T22AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22AHM3_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 SM6T22AHM3_A/I?
For technical support, including SM6T22AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22AHM3_A/I requirements.
6.How does Aetrix verify that SM6T22AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T22AHM3_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 SM6T22AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T22AHM3_A/I?
All SM6T22AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22AHM3_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 SM6T22AHM3_A/I part is unused and in its original packaging.
Return procedure for SM6T22AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22AHM3_A/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 …
