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Vishay General Semiconductor - Diodes Division 1.5SMC22AHE3_A/I
- Part No.:
- 1.5SMC22AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22AHE3_A/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC SMC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5SMC22AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1.0 mA), 30.6 V maximum clamping voltage (VC) at 49.0 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs). It protects automotive-grade signal lines and power rails in ECU, sensor interfaces, and infotainment systems against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC22AHE3_A/I datasheet, 1.5SMC22AHE3_A/I pinout, 1.5SMC22AHE3_A/I application, or 1.5SMC22AHE3_A/I equivalent, this AEC-Q101 qualified TVS offers verified clamping performance, low incremental surge resistance, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly and high-reliability automotive environments.
Technical Context
This unidirectional TVS operates with a reverse stand-off voltage (VWM) of 18.8 V and exhibits ≤1.0 µA maximum reverse leakage (ID) at VWM. Its fast response time (<1 ps) enables suppression of sub-nanosecond transients before downstream ICs are damaged.
The device features glass-passivated junction construction, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and delivers thermal resistance of RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), supporting reliable operation up to TJ = +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at IT = 1.0 mA - defines precise voltage threshold where avalanche conduction begins reliably |
| VWM | 18.8 V - maximum continuous reverse operating voltage before significant leakage occurs |
| VC @ IPPM | 30.6 V at 49.0 A (10/1000 µs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - peak transient energy absorption capability without failure under standardized surge waveform |
| IFSM | 200 A (8.3 ms half-sine) - surge current handling for unidirectional forward conduction events |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference terminal | Connected to lower-potential side (e.g., GND or return path); forms avalanche junction with cathode |
| Cathode | Avalanche conduction terminal / Surge current sink | Marked with band; connected to protected line (e.g., 12 V rail or CAN_H); conducts surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable, repeatable avalanche characteristics over lifetime and temperature extremes |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge events |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive ECUs, ADAS sensors, and body control modules requiring zero field failures |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, reducing stress on downstream MOSFETs and MCUs |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying SMT production flow |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp surges above 30.6 V while remaining non-conductive below 18.8 V. Use Value: Prevents MCU brownout or latch-up during ISO 16750-2 load dump (up to 35 V, 100 ms), extending system uptime. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair in vehicle telematics modules against ESD and coupled transients. IC Role / Device Role / Timing Role: Two unidirectional 1.5SMC22AHE3_A/I devices (one per line) referenced to chassis ground, clamping common-mode surges. Use Value: Maintains CAN signal integrity during IEC 61000-4-2 contact discharge (±8 kV) without bus shutdown or bit errors. |
| Industrial Sensor Interface Protection | Consumer Appliance Motor Drive Inputs |
|
Use Scenario: Shielding analog front-end inputs of pressure/temperature sensors in HVAC control boards from relay coil flyback. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting inductive kickback (tens of ns rise time) before reaching op-amp input stage. Use Value: Eliminates sensor offset drift and ADC saturation caused by 100–200 V transients from 24 V solenoid switching. |
Use Scenario: Securing mains-input rectifier outputs in smart washing machine motor controllers subjected to lightning surges. IC Role / Device Role / Timing Role: Placed across DC bus (e.g., +310 V rail), conducting surge current away from IGBT gate drivers and capacitors. Use Value: Absorbs 1500 W pulses without degradation, preventing catastrophic failure during IEC 61000-4-5 Line-to-Ground surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/57T | Same VBR range (20.9–23.1 V), but SMA package (DO-214AC); lower PPPM = 400 W; RθJA = 110 °C/W | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 Pulse 5a load dump | Select when board space is constrained and surge energy is <400 W; verify thermal margin at 125 °C ambient. |
| 1.5KE22A-E3/54 | Through-hole DO-201 package; identical VBR/VC specs; PPPM = 1500 W; no AEC-Q101 qualification | Not approved for automotive production; requires wave solder or hand-solder; higher mounting height limits PCB density | Choose for industrial prototypes or cost-sensitive non-automotive designs where AEC-Q101 is not mandated. |
Compared with SMAJ22A-E3/57T and 1.5KE22A-E3/54, the 1.5SMC22AHE3_A/I uniquely combines AEC-Q101 qualification, SMC's superior thermal dissipation (RθJA = 75 °C/W), and 1500 W surge rating in a surface-mount footprint-making it the only option qualified for volume automotive production with full load-dump immunity.
Availability
1.5SMC22AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer appliance motor drive circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for 1.5SMC22AHE3_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, TVS, and MOSFETs with emphasis on reliability, power efficiency, and automotive-grade validation.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC22AHE3_A/I under a 10/1000 µs surge?
The 1.5SMC22AHE3_A/I has a maximum clamping voltage (VC) of 30.6 V when subjected to its rated peak pulse current of 49.0 A using the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88303 and ensures downstream components see no more than 30.6 V during surge events, protecting sensitive 3.3 V or 5 V logic interfaces connected to the same rail.
Is the 1.5SMC22AHE3_A/I suitable for automotive applications?
Yes, the 1.5SMC22AHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's 1.5SMC Series datasheet (Rev. 09-Mar-2026). It is designed for automotive power rails, sensor interfaces, and communication buses-including compliance with ISO 7637-2 and IEC 61000-4-5-and supports junction temperatures up to +150 °C required for under-hood deployment.
What does the "HE3_A/I" suffix mean in 1.5SMC22AHE3_A/I?
The "HE3" denotes RoHS-compliant and AEC-Q101 qualified construction; "A" indicates the device is unidirectional; "I" specifies packaging in 13-inch tape-and-reel format with 3500 units per reel. This ordering code aligns with Vishay's documented scheme in section "ORDERING INFORMATION" of document 88303, ensuring traceability and automotive-grade material compliance.
How does the 1.5SMC22AHE3_A/I compare to bidirectional TVS diodes like 1.5SMC22CA?
The 1.5SMC22AHE3_A/I is unidirectional and intended for DC line protection (e.g., VCC-to-GND), whereas 1.5SMC22CA is bidirectional for AC or differential signal lines (e.g., RS-485, USB D+/D−). The 1.5SMC22AHE3_A/I provides lower leakage (<1.0 µA at 18.8 V) and tighter VBR tolerance in one polarity, but cannot suppress negative-going transients on positive rails without additional circuitry.
What is the thermal resistance of the 1.5SMC22AHE3_A/I, and why does it matter?
The 1.5SMC22AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. These values directly impact sustained power handling: at 6.5 W steady-state dissipation, junction temperature rise is ~488 °C above ambient without heatsinking-so the device relies on short-duration surge operation and proper PCB copper area (0.31″ × 0.31″ pads per datasheet) to stay within its +150 °C TJ limit.
1.5SMC22AHE3_A/I 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC22AHE3_A/I FAQ
1.How can I place an order for 1.5SMC22AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22AHE3_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 1.5SMC22AHE3_A/I reliable?
The price and inventory of 1.5SMC22AHE3_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 1.5SMC22AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC22AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22AHE3_A/I?
1.5SMC22AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22AHE3_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 1.5SMC22AHE3_A/I?
For technical support, including 1.5SMC22AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC22AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22AHE3_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 1.5SMC22AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC22AHE3_A/I?
All 1.5SMC22AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22AHE3_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 1.5SMC22AHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC22AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22AHE3_A/I Tags
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