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Vishay General Semiconductor - Diodes Division 1.5SMC20AHE3_A/H
- Part No.:
- 1.5SMC20AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20AHE3_A/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,540
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Product details
Overview
1.5SMC20AHE3_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 sensitive electronics. It features 20 V standoff voltage (VWM), 21.0 V maximum breakdown voltage (VBR), 27.7 V clamping voltage at 54.2 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 µs waveform - ideal for automotive sensor line protection against ESD and lightning-induced transients.
For engineers reviewing the 1.5SMC20AHE3_A/H datasheet, 1.5SMC20AHE3_A/H pinout, 1.5SMC20AHE3_A/H application, or 1.5SMC20AHE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads per terminal.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below its 20 V standoff voltage and rapidly transitions to low-impedance conduction above its 21.0 V breakdown threshold. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1.0 ps), enabling effective suppression of sub-nanosecond transients.
The device delivers 1500 W peak pulse power under standardized 10/1000 µs waveform conditions, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads). It supports repetitive surge duty cycles up to 0.01 % and is rated for continuous operation from –65 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20 V - Maximum reverse working voltage before clamping begins; defines safe operating range for protected circuit. |
| VBR (Breakdown) | 19.0–21.0 V at 1.0 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | 27.7 V at 54.2 A - Peak voltage seen by downstream circuit during 10/1000 µs transient; determines protection margin for ICs/MOSFETs. |
| PPPM | 1500 W - Peak pulse power handling capacity; enables survival of high-energy surges like ISO 7637-2 Pulse 1/2a/5a. |
| ID (Leakage) | <1.0 µA at 20 V - Ultra-low reverse leakage preserves signal integrity and battery life in always-on systems. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments without derating concerns. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected line connection point | Connected to signal/power line requiring overvoltage clamping; reverse-biased during normal operation. |
| Anode | Reference/ground connection | Typically tied to system ground or low-impedance return path; completes clamping current loop during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without external series impedance. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage across temperature and lifetime stress conditions. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS sensor modules per industry reliability requirements. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge). |
| MSL Level 1 rating | Enables direct placement into reflow soldering processes without dry-pack or baking preconditioning. |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control units against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and chassis ground to shunt surge energy away from precision front-end amplifiers and microcontrollers. Use Value: Maintains signal fidelity under ISO 16750-2 load dump (12 V system: 35 V/1 s) while limiting clamped voltage to ≤27.7 V - well below 30 V absolute maximum ratings of most automotive-grade op-amps. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers exposed to field wiring transients from relay coil de-energization or motor drive noise. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input terminals to clamp induced surges before they reach optocoupler or Schmitt-trigger input stages. Use Value: Withstands repeated 1500 W pulses at 0.01 % duty cycle, enabling reliable operation in factory automation environments where surge repetition is common. |
| Telecom Power Supply Protection | Consumer USB Port ESD Protection |
Use Scenario: Secondary-side overvoltage suppression on 48 V telecom rectifier outputs feeding PoE injectors or base station RF modules. IC Role / Device Role / Timing Role: Unidirectional TVS installed between +48 V rail and ground to absorb coupled lightning surges (IEC 61000-4-5) without affecting regulation loop stability. Use Value: 27.7 V clamping voltage provides ≥20 V headroom relative to 48 V nominal rail, preventing false triggering while ensuring downstream DC-DC converters remain within safe operating area. |
Use Scenario: Front-line ESD protection for USB 2.0 data lines (D+/D−) and VBUS in portable media players and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed on VBUS line to suppress ±15 kV contact/±25 kV air-gap ESD per IEC 61000-4-2 without distorting 480 Mbps signaling. Use Value: Sub-1 µA leakage at 5 V ensures minimal standby current draw; fast response time prevents latch-up in USB transceivers during ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same 20 V VWM and 27.7 V VC, but lower 400 W PPPM rating and SMA package (higher RθJA = 110 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); unsuitable for ISO 7637-2 or lightning-level surges. | Select when cost or board space is critical and surge threat level is limited to ESD and minor inductive spikes. |
| 1.5KE20A | Through-hole TO-204AA (DO-41) package; identical electrical specs but incompatible with SMT assembly and higher thermal resistance (RθJA = 60 °C/W on FR-4). | Requires manual or wave-solder assembly; not qualified to AEC-Q101; lacks MSL Level 1 compliance. | Choose only for legacy through-hole designs or prototyping where reflow compatibility and automotive qualification are not required. |
Compared with SMAJ20A and 1.5KE20A, the 1.5SMC20AHE3_A/H uniquely combines 1500 W surge capability, AEC-Q101 qualification, SMT-ready SMC packaging, and MSL Level 1 process compatibility - making it the only option suitable for volume production of automotive and industrial SMT assemblies requiring full IEC/ISO surge compliance.
Availability
1.5SMC20AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC inputs, telecom power supplies, and consumer USB interface protection requiring stable component supply, AEC-Q101 traceability, and SMT manufacturing readiness.
Supply support for 1.5SMC20AHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount TVS protection for automotive, industrial, and telecom systems demanding AEC-Q101 qualification, low-profile packaging, and repeatable clamping performance under harsh transient conditions.
FAQ
What is the clamping voltage of the 1.5SMC20AHE3_A/H under a 10/1000 µs surge?
The 1.5SMC20AHE3_A/H has a maximum clamping voltage (VC) of 27.7 V at 54.2 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88303 and represents the highest voltage imposed on the protected circuit during a full-power transient event. The 1.5SMC20AHE3_A/H maintains this clamping performance across its specified operating temperature range and after multiple surge events when operated within its derating limits.
Is the 1.5SMC20AHE3_A/H suitable for automotive applications?
Yes, the 1.5SMC20AHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix and revision-coded "_A/H" ordering format. It meets requirements for temperature cycling, high-temperature reverse bias, and ESD robustness defined in AEC-Q101 Rev D. The 1.5SMC20AHE3_A/H is commonly deployed in engine control units, body electronics, and ADAS sensor interfaces where ISO 7637-2 and ISO 16750-2 compliance is mandatory.
What does the "_A/H" suffix mean in 1.5SMC20AHE3_A/H?
The "_A/H" suffix in 1.5SMC20AHE3_A/H indicates two attributes: "A" denotes AEC-Q101 qualification for the 6.8 V to 220 V unidirectional/bidirectional voltage range, and "H" specifies packaging in 7-inch plastic tape-and-reel format with 850 units per reel. This ordering code ensures traceability to Vishay's automotive-grade production lot and confirms compliance with J-STD-020 MSL Level 1 reflow requirements.
How does the 1.5SMC20AHE3_A/H compare to bidirectional TVS diodes?
The 1.5SMC20AHE3_A/H is unidirectional and intended for DC-biased lines where polarity is fixed - such as VBUS, 12 V/24 V rails, or single-ended sensor outputs. Unlike bidirectional variants (e.g., 1.5SMC20CA), it blocks reverse current until breakdown occurs, offering lower leakage and tighter VBR tolerance. The 1.5SMC20AHE3_A/H should not be substituted for bidirectional types in AC-coupled or floating signal paths without circuit redesign.
What is the thermal resistance of the 1.5SMC20AHE3_A/H?
The 1.5SMC20AHE3_A/H 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, and a junction-to-leads resistance (RθJL) of 15 °C/W. These values are measured per JEDEC standards and define the device's ability to dissipate power during repetitive surge events. Derating curves in Figure 2 of document 88303 must be applied when ambient temperature exceeds 25 °C.
1.5SMC20AHE3_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):
- 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_A/H FAQ
1.How can I place an order for 1.5SMC20AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20AHE3_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 1.5SMC20AHE3_A/H reliable?
The price and inventory of 1.5SMC20AHE3_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 1.5SMC20AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC20AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20AHE3_A/H?
1.5SMC20AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20AHE3_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 1.5SMC20AHE3_A/H?
For technical support, including 1.5SMC20AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20AHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC20AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20AHE3_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 1.5SMC20AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC20AHE3_A/H?
All 1.5SMC20AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20AHE3_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 1.5SMC20AHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC20AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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