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Vishay General Semiconductor - Diodes Division 1.5SMC22AHM3_A/H
- Part No.:
- 1.5SMC22AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22AHM3_A/H.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,825
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Product details
Overview
1.5SMC22AHM3_A/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 power rails and signal lines. 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 maximum clamping voltage (VC) at 49.0 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 µs waveform - used in automotive sensor interface protection and industrial DC power input stages.
For engineers reviewing the 1.5SMC22AHM3_A/H datasheet, 1.5SMC22AHM3_A/H pinout, 1.5SMC22AHM3_A/H application, or 1.5SMC22AHM3_A/H equivalent, key selection criteria include clamping performance under 49 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and thermal resistance (RθJA = 75 °C/W) for board-level thermal design.
Technical Context
This device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified breakdown threshold (20.9–23.1 V). Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while fast response time (<1 ns) enables suppression of ESD and lightning-induced transients before downstream ICs are damaged.
The 1.5SMC22AHM3_A/H is rated for 1500 W peak pulse power (10/1000 µs), 200 A non-repetitive forward surge current (8.3 ms half-sine), and operates across -65 °C to +150 °C junction temperature range. Its SMC package supports automated placement and meets MSL level 1 (reflow peak 260 °C), with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at IT = 1.0 mA - defines precise avalanche initiation window for reliable overvoltage triggering |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 30.6 V at 49.0 A - clamped voltage seen by protected circuit during worst-case 10/1000 µs surge |
| PPPM | 1500 W - peak transient energy absorption capacity without failure under standardized waveform |
| IFSM | 200 A - surge current handling for 8.3 ms half-sine, critical for inductive load switching events |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance determines required PCB copper area for sustained power dissipation |
| TJ max | +150 °C - maximum allowable junction temperature, enabling operation in under-hood automotive environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads; cathode indicated by band on one end; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to lower-potential side of protected line | Must be tied to ground or return path in standard unidirectional TVS configuration |
| Cathode | Current exit point in forward bias; marked with band; reverse-biased during clamping | Connected to the line being protected (e.g., 24 V rail); conducts avalanche current to ground when VIN > VC |
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 (HM3) | Meets environmental compliance requirements for Tier-1 automotive and industrial OEM supply chains |
| 1500 W peak pulse power (10/1000 µs) | Supports high-energy transient suppression in 24 V systems subject to ISO 7637-2 Pulse 5a/b or IEC 61000-4-5 surges |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive MOSFET gates |
| MSL Level 1 (260 °C peak) | Enables compatibility with standard lead-free reflow profiles without pre-baking or special handling |
Applications
| Automotive Sensor Interface | Industrial 24 V Power Input |
|---|---|
Use Scenario: Protecting CAN/LIN transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and inductive switching noise in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor supply rail and chassis ground to clamp transients before they reach precision ADCs or communication ICs. Use Value: Limits clamped voltage to 30.6 V during 49 A surge, preserving integrity of 3.3 V/5 V logic interfaces and preventing latch-up in downstream ASICs. |
Use Scenario: Safeguarding programmable logic controllers (PLCs) and motor drives against 24 V DC bus overvoltage caused by relay coil de-energization or field wiring faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 24 V input, coordinated with upstream fuse and downstream DC-DC converter input filter. Use Value: Absorbs up to 1500 W of transient energy without degradation, maintaining system uptime in factory automation environments with frequent inductive load switching. |
| Telecom Power Supply Protection | Consumer Appliance Control Board |
Use Scenario: Shielding PoE-powered network switches and base station power modules from lightning-induced surges on AC/DC adapter outputs. IC Role / Device Role / Timing Role: Secondary-stage TVS on regulated 12 V or 5 V output rails, complementing primary MOV-based AC-side protection. Use Value: Fast <1 ns response ensures clamping occurs before transient propagates to Ethernet PHY or memory ICs, meeting IEC 61000-4-5 Level 4 immunity. |
Use Scenario: Securing microcontroller I/O and relay driver circuits in washing machines, HVAC controllers, and smart home hubs exposed to mains-borne noise. IC Role / Device Role / Timing Role: Point-of-load TVS on microcontroller VDD pins and optocoupler inputs to prevent reset corruption or false triggering. Use Value: 18.8 V stand-off voltage allows normal 24 V control rail operation while clamping spikes above 30.6 V, eliminating need for external voltage regulators in cost-sensitive designs. |
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 | Lower peak power rating (600 W vs. 1500 W); SMB package (smaller footprint, higher RθJA = 85 °C/W) | Suitable for space-constrained consumer electronics with lower surge exposure; not recommended for automotive load dump | Select when board area is limited and surge threat level is ≤ IEC 61000-4-5 Level 2 |
| 1.5KE22A | Through-hole DO-201 package; identical electrical specs but incompatible mounting; no AEC-Q101 qualification | Legacy industrial designs requiring manual assembly or high-vibration mechanical retention | Choose only for retrofit or repair where SMC rework is impractical and automotive qualification is unnecessary |
Compared with SMBJ22A-E3/52 and 1.5KE22A, the 1.5SMC22AHM3_A/H delivers superior surge robustness in surface-mount form factor with automotive-grade reliability - making it the preferred choice for new 24 V embedded systems where PCB real estate, thermal management, and qualification compliance are jointly critical.
Availability
1.5SMC22AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC power inputs, telecom power supply hardening, and consumer appliance control boards requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC22AHM3_A/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 compliance, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC22AHM3_A/H under maximum rated surge current?
The 1.5SMC22AHM3_A/H exhibits a maximum clamping voltage (VC) of 30.6 V when subjected to its rated peak pulse current of 49.0 A using the 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet (Document Number: 88303) and defines the upper voltage limit imposed on the protected circuit during worst-case transient events. Maintaining VC below downstream IC absolute maximum ratings is essential for effective protection - the 30.6 V clamping ensures compatibility with 36 V-tolerant automotive interfaces.
Is the 1.5SMC22AHM3_A/H qualified for automotive applications?
Yes, the 1.5SMC22AHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in the Vishay 1.5SMC Series datasheet (Revision: 09-Mar-2026). The "HM3" designation indicates halogen-free, RoHS-compliant construction with full AEC-Q101 stress testing - including temperature cycling, high-temperature reverse bias (HTRB), and ESD. This makes the 1.5SMC22AHM3_A/H suitable for under-hood and cabin ECU applications where reliability under thermal and vibration stress is critical.
What does the "_A/H" suffix mean in 1.5SMC22AHM3_A/H?
The "_A/H" suffix in 1.5SMC22AHM3_A/H specifies two attributes: "A" denotes AEC-Q101 qualification for the 1.5SMC22A variant (applicable to 6.8 V–220 V devices), and "H" indicates packaging in 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel. This ordering code format is defined in the Vishay 1.5SMC Series Ordering Information table (page 3 of Document 88303) and ensures correct logistics and qualification traceability for production use.
How does the thermal performance of the 1.5SMC22AHM3_A/H affect PCB layout?
The 1.5SMC22AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, meaning each watt of sustained power dissipation raises junction temperature by 75 °C above ambient. To maintain TJ ≤ 150 °C at 6.5 W rated power, ambient must stay ≤ 55 °C - achievable only with minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal as specified in the Vishay datasheet. Reducing pad area increases RθJA, risking thermal runaway during repetitive surges.
Can the 1.5SMC22AHM3_A/H replace a bidirectional TVS in an existing design?
No - the 1.5SMC22AHM3_A/H is strictly unidirectional, with polarity marked by a cathode band. Using it in place of a bidirectional device (e.g., 1.5SMC22CA) would leave the circuit unprotected during positive-going transients on grounded lines or AC-coupled signals. Bidirectional variants have symmetric clamping in both directions and no polarity marking. Substitution requires schematic and layout revision to accommodate unidirectional orientation and verify ground-referenced topology - the 1.5SMC22AHM3_A/H is not a drop-in replacement for bidirectional TVS diodes.
1.5SMC22AHM3_A/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:
- Active
- 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_A/H FAQ
1.How can I place an order for 1.5SMC22AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22AHM3_A/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_A/H reliable?
The price and inventory of 1.5SMC22AHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC22AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22AHM3_A/H?
1.5SMC22AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22AHM3_A/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_A/H?
For technical support, including 1.5SMC22AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC22AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22AHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC22AHM3_A/H?
All 1.5SMC22AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22AHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC22AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22AHM3_A/H Tags
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