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Vishay General Semiconductor - Diodes Division 1.5SMC22AHM3/H
- Part No.:
- 1.5SMC22AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22AHM3/H.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,903
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Product details
Overview
1.5SMC22AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1.0 mA), 18.8 V stand-off voltage (VWM), 30.6 V clamping voltage (VC) at 49.0 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 µs waveform - deployed in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the 1.5SMC22AHM3/H datasheet, 1.5SMC22AHM3/H pinout, 1.5SMC22AHM3/H application, or 1.5SMC22AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), low incremental surge resistance, fast response time, and compatibility with automated SMT placement on standard PCB pads.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient voltages above its VWM threshold, limiting downstream circuit stress during ESD, lightning-induced surges, or inductive switching events. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repetitive surge conditions.
The device is rated for 150 °C maximum junction temperature, exhibits a typical thermal resistance of 75 °C/W (junction-to-ambient) on recommended 8.0 mm × 8.0 mm copper pads, and supports peak forward surge current up to 200 A (8.3 ms half-sine), making it suitable for high-energy transient suppression in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA test current - defines precise avalanche initiation range for predictable clamping onset |
| VWM | 18.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 30.6 V at 49.0 A - clamped voltage seen by protected circuit during full 1500 W transient event |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, enabling protection against IEC 61000-4-5 Level 4 surges |
| IFSM | 200 A - single half-sine surge current rating (8.3 ms), supporting high-energy inductive load switching events |
| TJ max. | 150 °C - enables operation in under-hood automotive and industrial control cabinet environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" x 0.246" footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with UL 94 V-0 flammability rating; cathode indicated by band on body; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (reverse-biased operation) | Connected to protected line; conducts during transient to shunt energy to ground |
| Cathode | Current exit terminal (reverse-biased operation) | Connected to system ground; polarity marking (band) ensures correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per JEDEC standards |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for modern automotive and industrial supply chains without compromising surge robustness |
| 1500 W peak pulse power (10/1000 µs) | Provides immunity to severe transients such as ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes voltage overshoot during clamping, reducing stress on downstream ICs like CAN transceivers or microcontrollers |
| MSL Level 1 (260 °C peak reflow) | Enables compatibility with standard lead-free SMT reflow profiles without preconditioning or special handling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog and digital signal lines (e.g., throttle position, oxygen sensor, LIN bus) from load dump and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp positive-going transients while blocking normal DC bias. Use Value: Prevents latch-up or permanent damage to automotive-grade MCUs and analog front-ends during ISO 16750-2 load dump events (up to 120 V, 400 ms). |
Use Scenario: Shielding 24 V DC digital input modules in programmable logic controllers from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across input terminals to limit voltage to safe levels before optocoupler or Schmitt trigger input stage. Use Value: Ensures reliable operation under IEC 61000-4-4 EFT (4 kV) and IEC 61000-4-5 surge (2 kV line-earth) without false triggering or component failure. |
| Telecom Line Interface Protection | Consumer Power Adapter ESD Guard |
Use Scenario: Safeguarding Ethernet PHY interface pins and PoE detection circuitry in network switches and IP cameras from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on differential pairs, referenced to local ground plane to suppress asymmetrical transients. Use Value: Maintains signal integrity while meeting GR-1089-CORE Level 3 telecom surge immunity (10/700 µs, 1 kV) without degrading 100BASE-TX bandwidth. |
Use Scenario: Adding secondary-level surge protection on AC/DC adapter output rails (5 V/12 V) to prevent ESD propagation into USB ports or display controllers. IC Role / Device Role / Timing Role: Final-stage TVS placed immediately before connector to absorb contact discharge (IEC 61000-4-2 ±8 kV) before reaching downstream LDOs or PMICs. Use Value: Eliminates need for costly redesign after field failures due to human-body-model ESD events during plug/unplug cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A-E3/52 | Same VBR range (20.9–23.1 V), but SMB package (smaller footprint, lower PPPM = 600 W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5 or IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is ≤ 1 kV (e.g., consumer USB ports) |
| 1.5KE22A | Through-hole DO-201 package, identical electrical specs but higher RθJA (≈100 °C/W) and no AEC-Q101 qualification | Not suitable for automotive production or high-density SMT assemblies; requires wave soldering | Choose only for legacy through-hole designs or cost-sensitive industrial prototypes where reflow compatibility is not required |
Compared with SMBJ22A-E3/52 and 1.5KE22A, the 1.5SMC22AHM3/H uniquely combines AEC-Q101 qualification, 1500 W surge capacity, halogen-free compliance, and SMC package scalability - making it the preferred choice for new automotive and industrial SMT designs requiring certified reliability and high-energy clamping.
Availability
1.5SMC22AHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer power adapter designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5SMC22AHM3/H 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 1.5SMC Series was engineered for high-power, surface-mount transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance, AEC-Q101 validation, and robust surge handling in compact SMC packaging.
FAQ
What is the clamping voltage of the 1.5SMC22AHM3/H at its rated peak pulse current?
The 1.5SMC22AHM3/H has a maximum clamping voltage (VC) of 30.6 V at its rated peak pulse current (IPPM) of 49.0 A, measured using a 10/1000 µs waveform. This value ensures protected circuits remain below critical overvoltage thresholds during standardized surge events, and is verified per the Vishay 88303 datasheet Table on page 2.
Is the 1.5SMC22AHM3/H qualified for automotive applications?
Yes, the 1.5SMC22AHM3/H carries the HM3 suffix, indicating it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. This certification covers stress tests including temperature cycling, high-temperature reverse bias, and surge endurance - confirming suitability for under-hood and body-control module applications per the Vishay 1.5SMC Series specification document.
What does the "H" in the 1.5SMC22AHM3/H ordering code signify?
The "H" in 1.5SMC22AHM3/H denotes the tape-and-reel packaging option: 7-inch diameter plastic tape and reel containing 850 units. This format is optimized for high-speed pick-and-place assembly and aligns with IPC-7351 land pattern recommendations for the SMC (DO-214AB) package used by the 1.5SMC22AHM3/H.
How does the 1.5SMC22AHM3/H differ from bidirectional TVS diodes like 1.5SMC22CA?
The 1.5SMC22AHM3/H is unidirectional and features a cathode band for polarity-sensitive placement, whereas 1.5SMC22CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The 1.5SMC22AHM3/H offers lower leakage at VWM and is preferred for DC-biased lines like automotive sensor feeds, while 1.5SMC22CA suits AC-coupled or floating signal paths.
What is the thermal resistance of the 1.5SMC22AHM3/H under standard mounting conditions?
The 1.5SMC22AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad per terminal. This value assumes still air convection and is critical for calculating junction temperature rise during repetitive surge events - a key parameter documented in the Vishay 88303 datasheet Thermal Characteristics table.
1.5SMC22AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 49A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC22AHM3/H FAQ
1.How can I place an order for 1.5SMC22AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22AHM3/H 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 1.5SMC22AHM3/H reliable?
The price and inventory of 1.5SMC22AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC22AHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC22AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22AHM3/H?
1.5SMC22AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22AHM3/H 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 1.5SMC22AHM3/H?
For technical support, including 1.5SMC22AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC22AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22AHM3/H 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 1.5SMC22AHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC22AHM3/H?
All 1.5SMC22AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22AHM3/H, 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 1.5SMC22AHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC22AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22AHM3/H Tags
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