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Vishay General Semiconductor - Diodes Division 1.5SMC22AHE3/57T
- Part No.:
- 1.5SMC22AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22AHE3/57T.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,456
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Product details
Overview
1.5SMC22AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 18.8 V stand-off voltage (VWM), clamps to ≤30.6 V at 49 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the 1.5SMC22AHE3/57T datasheet, 1.5SMC22AHE3/57T pinout, 1.5SMC22AHE3/57T application, or 1.5SMC22AHE3/57T equivalent, key selection criteria include its AEC-Q101 qualification, SMC (DO-214AB) package, unidirectional polarity with cathode band marking, low incremental surge resistance, and compliance with UL 94 V-0 flammability rating.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM (18.8 V) and rapidly transitions to low-impedance conduction above VBR (20.9–23.1 V), limiting transient-induced voltage excursions to ≤30.6 V at 49 A. Its glass-passivated junction ensures stable avalanche characteristics and long-term reliability under repetitive surge stress.
Designed for surface-mount automated assembly, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C), supports 200 A non-repetitive forward surge (8.3 ms half-sine), and exhibits a temperature coefficient of VBR of +0.092 %/°C - enabling predictable performance across –65 °C to +150 °C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise avalanche onset threshold for reliable clamping activation |
| VWM | 18.8 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | ≤30.6 V at 49 A - clamped voltage during 1500 W 10/1000 µs transient, limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling capability under standardized surge waveform |
| IFSM | 200 A - single half-sine surge current rating (8.3 ms), supporting high-energy inductive switch-off events |
| TJ max. | +150 °C - maximum junction temperature, enabling operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; polarity indicated by cathode band on unidirectional devices; compliant with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side reference | Provides low forward voltage drop (<3.5 V at 100 A) during surge conduction to ground path |
| Cathode | Current exit terminal in forward bias; marked with band; connects to line being protected | Defines unidirectional clamping direction - conducts only when cathode voltage exceeds anode by ≥VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per AEC stress test plan |
| 1500 W peak pulse power | Withstands high-energy transients from load dump, inductive switching, and ESD-coupled surges without degradation |
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics and low parameter drift over lifetime and temperature |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking - compatible with high-volume automated assembly at 260 °C peak |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage margin between clamping and breakdown, improving system-level surge immunity |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting 5 V or 12 V analog/digital sensor signal lines (e.g., crankshaft position, oxygen sensor) from ISO 7637-2 pulse 1/2a/3a and ESD events. IC Role / Device Role: Unidirectional clamping TVS placed between signal line and chassis ground to shunt transients before reaching MCU input pins. Use Value: Clamps induced spikes to ≤30.6 V while maintaining <1 µA leakage at 18.8 V - preserving signal integrity and preventing false triggering. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers against field-wiring transients and relay coil flyback. IC Role / Device Role: Primary overvoltage clamp on input terminal block, mounted upstream of optocoupler or Schmitt trigger input stage. Use Value: Absorbs up to 1500 W surge energy (10/1000 µs) without failure, enabling >100,000 surge cycles per IEC 61000-4-5 compliance testing. |
| DC Power Rail Surge Suppression | Telecom Line Interface Protection |
|
Use Scenario: Secondary protection on 24 V or 48 V intermediate bus rails in industrial power supplies and motor drives subjected to lightning-induced surges. IC Role / Device Role: Parallel-connected TVS across rail-to-ground to limit voltage overshoot during fast-rising transients. Use Value: Fast response time (<1 ns) and low dynamic impedance ensure clamping occurs before downstream MOSFETs or regulators experience overvoltage stress. |
Use Scenario: Protecting RS-485/RS-232 interface transceivers in telecom base station equipment from induced surges on long cable runs. IC Role / Device Role: Line-to-ground TVS on differential pair inputs, paired with common-mode chokes for full IEC 61000-4-5 Level 4 immunity. Use Value: AEC-Q101 qualification and 1500 W rating support sustained operation in harsh outdoor telecom environments with wide ambient temperature swings. |
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 pulse power (600 W), SMB package (smaller footprint, higher thermal resistance), same VBR range | Better suited for space-constrained consumer electronics; insufficient for automotive load-dump duty cycle | Select when board area is critical and surge energy is ≤600 W; verify RθJA derating for ambient temperature |
| 1.5KE22A-T | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification or MSL Level 1 rating | Acceptable for industrial benchtop equipment; not approved for automotive production or high-reliability SMT lines | Choose only for legacy through-hole designs or prototyping where reflow compatibility and automotive qualification are not required |
Compared with 1.5SMC22AHE3/57T, SMBJ22A-E3/52 offers smaller size but reduced surge capacity and no automotive qualification, while 1.5KE22A-T provides identical clamping performance in through-hole form but lacks surface-mount process support and AEC-Q101 validation - making 1.5SMC22AHE3/57T the optimal choice for volume automotive and industrial SMT production.
Availability
1.5SMC22AHE3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply, AEC-Q101 compliance, and consistent SMC-package availability.
Supply support for 1.5SMC22AHE3/57T 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, precision, and application-specific qualification.
The 1.5SMC Series was engineered for high-power transient suppression in demanding automotive and industrial environments, combining AEC-Q101 qualification, robust SMC packaging, and tightly controlled clamping parameters.
FAQ
What is the clamping voltage of the 1.5SMC22AHE3/57T under maximum rated surge current?
The 1.5SMC22AHE3/57T clamps to a maximum of 30.6 V when subjected to its peak pulse current of 49 A (10/1000 µs waveform). This value is measured per standard test conditions defined in the Vishay datasheet and reflects the actual voltage seen by downstream circuitry during a worst-case transient event. The clamping voltage is guaranteed across the full operating temperature range and forms the basis for system-level overvoltage design margins.
Is the 1.5SMC22AHE3/57T qualified for automotive applications?
Yes, the 1.5SMC22AHE3/57T carries AEC-Q101 qualification, confirmed by Vishay's documentation and ordering code suffix "HE3". This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and surge endurance - validating its suitability for under-hood and chassis-mounted automotive electronics such as engine control units, body control modules, and ADAS sensor interfaces.
What does the "HE3/57T" suffix indicate in the 1.5SMC22AHE3/57T part number?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification, while "57T" specifies packaging in 7-inch diameter plastic tape and reel containing 850 units. This format aligns with Vishay's standard ordering nomenclature and ensures compatibility with automated pick-and-place equipment calibrated for SMC (DO-214AB) devices on 12 mm carrier tape.
How does the 1.5SMC22AHE3/57T compare to bidirectional TVS diodes like 1.5SMC22CAHE3/57T?
The 1.5SMC22AHE3/57T is unidirectional and features a cathode band for polarity-sensitive placement, whereas 1.5SMC22CAHE3/57T is bidirectional with symmetric clamping in both directions and no polarity marking. The unidirectional version offers lower leakage at VWM and is preferred for DC rail protection; the bidirectional variant suits AC-coupled or floating signal lines where polarity reversal may occur.
What is the thermal resistance and power derating behavior of the 1.5SMC22AHE3/57T?
The 1.5SMC22AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W on standard 8 mm × 8 mm copper pads. Its peak pulse power must be derated linearly above 25 °C ambient - for example, at 85 °C, maximum PPPM drops to ~1050 W. Continuous power dissipation is limited to 6.5 W at 50 °C on infinite heatsink, with junction temperature capped at +150 °C.
1.5SMC22AHE3/57T 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:
- 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):
- 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)
1.5SMC22AHE3/57T FAQ
1.How can I place an order for 1.5SMC22AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22AHE3/57T 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 1.5SMC22AHE3/57T reliable?
The price and inventory of 1.5SMC22AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC22AHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC22AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22AHE3/57T?
1.5SMC22AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22AHE3/57T 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 1.5SMC22AHE3/57T?
For technical support, including 1.5SMC22AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22AHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC22AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22AHE3/57T 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 1.5SMC22AHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC22AHE3/57T?
All 1.5SMC22AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22AHE3/57T, 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 1.5SMC22AHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC22AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22AHE3/57T Tags
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