My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC22AHE3/9AT
- Part No.:
- 1.5SMC22AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22AHE3/9AT.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,304
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC22AHE3/9AT 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 1 mA), 18.8 V stand-off voltage (VWM), and 30.6 V maximum clamping voltage (VC) at 49 A peak pulse current. It delivers 1500 W peak pulse power (10/1000 µs), supports automotive-grade reliability (AEC-Q101 qualified), and protects MOSFETs and sensor signal lines in industrial power supplies.
For engineers reviewing the 1.5SMC22AHE3/9AT datasheet, 1.5SMC22AHE3/9AT pinout, 1.5SMC22AHE3/9AT application, or 1.5SMC22AHE3/9AT equivalent, this page provides verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and AEC-Q101 qualification status - all critical for ESD and lightning transient protection design in automotive and industrial systems.
Technical Context
The 1.5SMC22AHE3/9AT uses a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low incremental surge resistance (Rdyn ≈ 0.25 Ω derived from ΔVC/ΔIPPM). Its unidirectional polarity features a cathode band marking and operates with reverse-biased clamping during transients while blocking up to 18.8 V in normal operation.
Thermal performance is defined by RθJA = 75 °C/W (on recommended 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C. It meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at IT = 1 mA - defines precise voltage threshold where clamping initiates under controlled test conditions |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets system-level working margin |
| VC @ IPPM | 30.6 V at 49 A (10/1000 µs) - actual clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - peak transient energy absorption capability without failure, validated per REA-defined waveform |
| IFSM | 200 A (8.3 ms half-sine) - surge current handling for unidirectional forward conduction events like load dump |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive and high-ambient industrial environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated placement |
Pinout & Package
SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, UL 94 V-0 flammability rating, and cathode band marking on unidirectional variants. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference | Enables standard unidirectional clamping configuration where TVS shunts transients from protected line to ground |
| Cathode | Current exit point in forward bias; marked with band; connected to protected line (e.g., 24 V rail or sensor input) | Determines polarity of protection - reverse-biased during normal operation, avalanche-conducting during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces requiring long-term reliability under thermal cycling and vibration |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation when properly mounted |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage stress on downstream ICs - e.g., keeps 3.3 V logic inputs below absolute maximum ratings during 1 kV EFT bursts |
| MSL Level 1 moisture sensitivity | Allows direct placement without baking; compatible with standard lead-free reflow profiles up to 260 °C peak |
| Glass-passivated junction | Ensures stable leakage current (<1 μA at VWM) and consistent VBR over 10+ year field life in humid environments |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply rails in body control modules against load dump transients (ISO 7637-2 Pulse 5a, up to 60 V/100 ms). IC Role / Device Role: Unidirectional TVS placed between battery feed and DC-DC converter input. Use Value: Clamps peak voltage to 30.6 V, preventing damage to 36 V-rated buck controllers and ensuring uninterrupted operation during alternator disconnection events. |
Use Scenario: Shielding analog outputs of pressure sensors in hydraulic control systems from ESD (IEC 61000-4-2 ±8 kV contact) and inductive switching noise. IC Role / Device Role: Low-capacitance TVS installed at sensor connector interface, grounded to chassis. Use Value: Limits transient overshoot to <31 V while maintaining signal integrity - no measurable distortion on 0–5 V ratiometric output due to sub-100 pF junction capacitance. |
| Telecom Line Interface | Consumer Appliance Motor Drive |
|
Use Scenario: Safeguarding RS-485 transceivers on outdoor security camera links exposed to lightning-induced surges on twisted-pair cabling. IC Role / Device Role: Paired unidirectional TVS devices on A/B differential lines referenced to local ground plane. Use Value: Absorbs 1500 W common-mode surges without latch-up; maintains >25 kV ESD immunity after 1000+ strikes per IEC 61000-4-2 testing. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart vacuum cleaners during PWM commutation. IC Role / Device Role: Mounted across motor terminals with cathode tied to positive supply rail. Use Value: Diverts 200 A single-half-sine surges (per IEC 61000-4-4) away from H-bridge MOSFETs, eliminating gate oxide stress and extending FET lifetime beyond 10,000 cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A-E3/52T | Lower PPPM (600 W), same VBR range, SMB package (smaller footprint, higher RθJA = 110 °C/W) | Acceptable for consumer-grade 24 V systems with lower surge exposure (IEC 61000-4-5 Level 2); not AEC-Q101 qualified | Select when board space is constrained and automotive qualification is unnecessary; verify thermal margin with reduced pad area. |
| 1.5KE22A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification or MSL Level 1 rating | Suitable for prototyping or legacy through-hole designs; incompatible with automated SMT assembly and high-reliability automotive production | Choose only for hand-soldered evaluation or cost-sensitive non-automotive applications where reflow compatibility and automotive validation are not required. |
Compared with SMBJ22A-E3/52T and 1.5KE22A, the 1.5SMC22AHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC package compatibility with J-STD-020-compliant reflow - making it the sole option among the three qualified for volume production in automotive ECUs and industrial PLCs demanding zero rework risk and long-term field stability.
Availability
1.5SMC22AHE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor protection, telecom line interface, and consumer appliance motor drive applications requiring stable component supply, AEC-Q101 compliance, and high-energy transient immunity.
Supply support for 1.5SMC22AHE3/9AT 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, power efficiency, and application-specific validation.
The 1.5SMC Series was engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where sustained surge immunity, thermal stability, and process-compatible packaging are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC22AHE3/9AT under a 10/1000 µs surge?
The 1.5SMC22AHE3/9AT exhibits a maximum clamping voltage (VC) of 30.6 V when subjected to its rated peak pulse current of 49 A using the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88303 and represents the upper bound of voltage imposed on the protected circuit during worst-case transient events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is the 1.5SMC22AHE3/9AT qualified for automotive applications?
Yes, the 1.5SMC22AHE3/9AT is AEC-Q101 qualified, as confirmed by its "HE3" suffix and documentation in Vishay's 1.5SMC series datasheet (Rev. 09-Mar-2026). This qualification covers stress tests including temperature cycling, humidity bias, mechanical shock, and accelerated life testing - validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS sensor interfaces.
What does the "9AT" suffix indicate in 1.5SMC22AHE3/9AT?
The "9AT" suffix denotes the packaging configuration: 13-inch diameter plastic tape and reel with a base quantity of 3500 units per reel. This format is optimized for high-volume SMT assembly lines and ensures consistent feeding performance in pick-and-place equipment - distinct from the "57T" variant (7-inch reel, 850 units) used for lower-volume or prototype builds.
How does the thermal resistance of the 1.5SMC22AHE3/9AT affect PCB layout?
The 1.5SMC22AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under full 6.5 W steady-state dissipation, designers must allocate ≥64 mm² of 2-oz copper per pad and avoid thermal isolation - undersized pads or thin traces will cause excessive junction heating and premature parametric shift.
Can the 1.5SMC22AHE3/9AT be used in bidirectional configurations?
No, the 1.5SMC22AHE3/9AT is strictly unidirectional, as indicated by its "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies part numbers ending in "CA" (e.g., 1.5SMC22CA). Using the 1.5SMC22AHE3/9AT in reverse-biased configurations risks permanent junction damage due to lack of symmetrical avalanche structure - always match device polarity to circuit topology.
1.5SMC22AHE3/9AT 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC22AHE3/9AT FAQ
1.How can I place an order for 1.5SMC22AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22AHE3/9AT 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 1.5SMC22AHE3/9AT reliable?
The price and inventory of 1.5SMC22AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC22AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC22AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22AHE3/9AT?
1.5SMC22AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22AHE3/9AT 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 1.5SMC22AHE3/9AT?
For technical support, including 1.5SMC22AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC22AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22AHE3/9AT 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 1.5SMC22AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC22AHE3/9AT?
All 1.5SMC22AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22AHE3/9AT, 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 1.5SMC22AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC22AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22AHE3/9AT 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 …
