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Vishay General Semiconductor - Diodes Division 1.5SMC20AHE3/57T
- Part No.:
- 1.5SMC20AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20AHE3/57T.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,417
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Product details
Overview
1.5SMC20AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 27.7 V clamping voltage at 54.2 A peak pulse current, and 17.1 V stand-off voltage - designed to protect automotive-grade power rails and signal lines from lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC20AHE3/57T datasheet, 1.5SMC20AHE3/57T pinout, 1.5SMC20AHE3/57T application, or 1.5SMC20AHE3/57T equivalent, key selection criteria include its AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on industrial and automotive PCBs.
Technical Context
This device operates as a unidirectional clamping TVS diode, leveraging a glass-passivated silicon junction to achieve fast response time (<1 ns) and stable breakdown behavior under repetitive transient stress. Its 10/1000 μs waveform rating reflects standardized surge immunity testing per IEC 61000-4-5.
The 1.5SMC20AHE3/57T features a cathode-band polarity marking, meets MSL Level 1 per J-STD-020, and supports peak forward surge current of 200 A (8.3 ms half-sine), enabling robust protection in DC power input stages and sensor interface circuits without requiring series impedance coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains high-energy transients without failure in automotive load-dump or ISO 7637-2 pulse 5a scenarios |
| Stand-off Voltage (VWM) | 17.1 V - blocks normal operating voltage up to this level while remaining non-conductive |
| Breakdown Voltage (VBR) | 19.0–21.0 V at 1 mA - defines the onset of avalanche conduction with tight 5% tolerance |
| Clamping Voltage (VC) | 27.7 V at 54.2 A IPPM - limits downstream circuit voltage during full-rated surge event |
| Peak Pulse Current (IPPM) | 54.2 A - maximum transient current it can safely shunt away from protected ICs or MOSFETs |
| Junction Temperature Range | −65 °C to +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1, 260 °C reflow peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side return path | Provides low-impedance path to ground during reverse-transient clamping; must be routed with minimal inductance |
| Cathode | Marked end (band); connected to line being protected (e.g., 12 V rail or CAN-H) | Defines unidirectional polarity - clamps only when cathode voltage exceeds anode by ≥VBR; incorrect orientation disables protection |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables single-device protection against severe ISO 7637-2 and IEC 61000-4-5 surge events without cascaded staging |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| AEC-Q101 qualified (HE3 suffix) | Validates reliability for automotive powertrain, body control, and ADAS modules per JEDEC stress standards |
| Low profile SMC package | Reduces board space vs. SMA/SMB; compatible with standard 0.31" × 0.31" copper pad layout for optimal thermal dissipation |
| 0.01 % duty cycle rating | Supports repetitive surge handling in systems with frequent motor switching or relay actuation |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: 12 V battery feed to body control module exposed to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed directly at connector entry point before DC-DC converter input. Use Value: Limits transient voltage to ≤27.7 V, preventing overvoltage damage to upstream regulators and microcontrollers. |
Use Scenario: Analog output line (0–5 V) from pressure sensor in factory automation PLC I/O module. IC Role / Device Role / Timing Role: Fast-response voltage clamp on signal trace adjacent to ESD coupling point. Use Value: Suppresses 8 kV contact ESD (IEC 61000-4-2) and inductive kickback without distorting low-voltage analog signal integrity. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: −48 V DC power input to telecom base station card subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage protector on bulk power rail, coordinated with upstream fuse and downstream filter caps. Use Value: Absorbs 1500 W surge energy within <1 ns, maintaining system uptime and avoiding brownout resets. |
Use Scenario: 24 V supply line to BLDC motor driver in smart washing machine control board. IC Role / Device Role / Timing Role: Reverse-polarity and switching transient suppressor across H-bridge supply terminals. Use Value: Withstands 200 A 8.3 ms forward surge from motor back-EMF, eliminating need for external crowbar circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/57T | Lower peak power (400 W), same VWM (17.1 V), smaller SMA package (DO-214AC), higher RθJA (100 °C/W) | Not suitable for automotive load dump; limited to lower-energy ESD/lightning events in consumer gear | Select only if space-constrained and surge energy ≤400 W; verify thermal derating at 85 °C ambient |
| 1.5KE20A-T | Through-hole TO-204AA (DO-41), 1500 W rating, but no AEC-Q101 qualification, higher mounting inductance | Requires manual assembly; unsuitable for automated production or vibration-prone automotive chassis mounts | Use only for prototyping or legacy through-hole designs where SMT is unavailable |
Compared with SMAJ20A-E3/57T and 1.5KE20A-T, the 1.5SMC20AHE3/57T uniquely combines AEC-Q101 qualification, SMT scalability, and full 1500 W capability in a thermally optimized SMC package - making it the preferred choice for volume automotive and industrial production where reliability, manufacturability, and surge margin are jointly critical.
Availability
1.5SMC20AHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, and telecom power supplies requiring stable component supply, AEC-Q101 compliance, and repeatable surge immunity performance.
Supply support for 1.5SMC20AHE3/57T 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 high-reliability, automotive-qualified components.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh-environment applications - prioritizing clamping precision, surge endurance, and AEC-Q101 validation for automotive and industrial power systems.
FAQ
What is the clamping voltage of the 1.5SMC20AHE3/57T at its rated peak pulse current?
The 1.5SMC20AHE3/57T has a maximum clamping voltage (VC) of 27.7 V at 54.2 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value ensures protected downstream components remain below their absolute maximum voltage ratings during worst-case surge events, and is verified per Vishay's test conditions using 0.31" × 0.31" copper pads per terminal.
Is the 1.5SMC20AHE3/57T suitable for automotive applications?
Yes, the 1.5SMC20AHE3/57T is AEC-Q101 qualified (indicated by the HE3 suffix), meaning it has passed rigorous stress tests including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing. It is explicitly intended for automotive power and signal line protection in engine control units, body electronics, and ADAS subsystems.
What does the "HE3" suffix signify in 1.5SMC20AHE3/57T?
The "HE3" suffix in 1.5SMC20AHE3/57T denotes a RoHS-compliant, AEC-Q101 qualified version with matte tin-plated leads and JESD201 Class 2 whisker resistance. It distinguishes this variant from commercial-grade E3 or halogen-free HM3 versions, confirming its suitability for automotive production and high-reliability industrial use.
How does the 1.5SMC20AHE3/57T differ from bidirectional TVS diodes like 1.5SMC20CA?
The 1.5SMC20AHE3/57T is unidirectional and features a cathode band for polarity-sensitive placement, clamping only during reverse-voltage transients. In contrast, 1.5SMC20CA is bidirectional with symmetrical clamping in both directions and no polarity marking - making it appropriate for AC lines or differential signals, whereas the 1.5SMC20AHE3/57T is optimized for DC power rail protection.
What is the thermal resistance junction-to-ambient for the 1.5SMC20AHE3/57T?
The 1.5SMC20AHE3/57T 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 pads per terminal. This value assumes still air conditions and is critical for calculating safe power derating above 25 °C ambient - for example, at 85 °C ambient, its usable peak pulse power drops to ~60% of rated 1500 W.
1.5SMC20AHE3/57T 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- 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)
1.5SMC20AHE3/57T FAQ
1.How can I place an order for 1.5SMC20AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20AHE3/57T 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 1.5SMC20AHE3/57T reliable?
The price and inventory of 1.5SMC20AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC20AHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC20AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20AHE3/57T?
1.5SMC20AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20AHE3/57T 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 1.5SMC20AHE3/57T?
For technical support, including 1.5SMC20AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20AHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC20AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20AHE3/57T 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 1.5SMC20AHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC20AHE3/57T?
All 1.5SMC20AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20AHE3/57T, 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 1.5SMC20AHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC20AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20AHE3/57T Tags
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