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Vishay General Semiconductor - Diodes Division 1.5SMC56AHE3_A/I
- Part No.:
- 1.5SMC56AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56AHE3_A/I.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,132
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Product details
Overview
1.5SMC56AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection with 56 V standoff voltage (VWM), 77.0 V clamping voltage (VC) at 19.5 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) capability under 10/1000 μs waveform - deployed to safeguard MOSFETs, ICs, and sensor signal lines against lightning-induced transients and inductive switching spikes in automotive and industrial power electronics.
For engineers reviewing the 1.5SMC56AHE3_A/I datasheet, 1.5SMC56AHE3_A/I pinout, 1.5SMC56AHE3_A/I application, or 1.5SMC56AHE3_A/I equivalent, key selection criteria include verified clamping performance at rated IPPM, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking, and compatibility with automated SMT placement on standard PCB pad layouts per JEDEC DO-214AB footprint.
Technical Context
This device operates as a silicon avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its unidirectional configuration features a cathode band marking and exhibits stable breakdown behavior with ±5% VBR tolerance (53.2–58.8 V at 1 mA test current).
Thermally, it supports operation from –65 °C to +150 °C junction temperature, with derated power dissipation above 25 °C ambient and a maximum forward surge current rating of 200 A (8.3 ms half-sine). It meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 47.8 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin below breakdown. |
| VBR (Breakdown) | 53.2–58.8 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transient events. |
| VC (Clamping) | 77.0 V at IPPM = 19.5 A - Peak voltage seen by protected circuit during full-rated 1500 W surge; critical for downstream component voltage margin. |
| PPPM | 1500 W - Peak pulse power handling under standardized 10/1000 μs waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; determines required copper pad area (0.31" × 0.31") for thermal management at 6.5 W steady-state dissipation. |
| TJ max. | +150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HM3 suffix variant), with cathode indicated by a band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to ground or low-side reference in unidirectional TVS configurations; must be routed with low-inductance path for effective clamping. |
| Cathode | Current exit terminal in forward bias; marked with band | Connected to protected line (e.g., 12 V rail or sensor input); polarity-sensitive placement prevents misapplication in DC systems. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against severe transients per IEC 61000-4-5, reducing need for cascaded protection stages. |
| Glass-passivated junction | Ensures long-term stability and low leakage (<1 μA at VWM), critical for battery-powered and low-power sensor interfaces. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring extended temperature and lifetime reliability. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow without baking, simplifying SMT assembly in high-volume manufacturing. |
| Low-profile SMC package | 0.320" × 0.246" footprint with 0.126" height fits compact PCB layouts while maintaining thermal mass for surge energy absorption. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: Protecting 12 V/24 V supply rails in engine control units (ECUs) and infotainment systems from load dump and alternator ripple. IC Role / Device Role: Unidirectional TVS placed between rail and chassis ground to clamp positive-going surges above 47.8 V. Use Value: Limits rail voltage to ≤77.0 V during 19.5 A transients, preventing damage to MCU power inputs and CAN transceivers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC I/O modules from ESD and cable discharge events. IC Role / Device Role: Low-capacitance unidirectional clamp on 0–5 V or 4–20 mA signal paths, referenced to local ground. Use Value: Maintains signal integrity with <1 μA leakage at 47.8 V, while clamping fast ESD pulses (IEC 61000-4-2) without latch-up. |
| DC-DC Converter Input Stage | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding buck converter inputs in telecom power supplies subjected to lightning-induced surges on AC/DC front-ends. IC Role / Device Role: Primary surge suppression stage upstream of input filter capacitors and controller ICs. Use Value: Absorbs 1500 W transient energy without degradation, preserving converter efficiency and enabling smaller input capacitor sizing. |
Use Scenario: Protecting high-side and low-side gate drivers in BLDC motor inverters from shoot-through-inducing voltage spikes during switching transitions. IC Role / Device Role: Localized clamping at driver output pins to suppress Miller-induced overshoot on gate nodes. Use Value: Sub-ns response prevents false triggering; 77.0 V clamping ensures gate oxide safety margin for 60 V-rated MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A-E3/52T | Same VWM (47.8 V) and VC (77 V), but lower PPPM (600 W); SMB package (smaller footprint, higher RθJA = 85 °C/W). | Preferred for space-constrained consumer electronics where 600 W surge level suffices; not AEC-Q101 qualified. | Select when board area is limited and automotive qualification is unnecessary; verify thermal margin with reduced copper pad area. |
| 1.5KE56A | Through-hole DO-15 package; identical electrical specs (VWM, VBR, VC), but no AEC-Q101 qualification and higher mounting inductance. | Suitable for prototyping or legacy through-hole designs; incompatible with automated SMT lines and high-frequency surge suppression. | Choose only for manual assembly or cost-sensitive non-automotive applications; avoid in production automotive or high-speed signal paths. |
Compared with SMBJ56A-E3/52T and 1.5KE56A, the 1.5SMC56AHE3_A/I delivers superior surge robustness (1500 W vs. 600 W or 1500 W with inferior thermal performance), AEC-Q101 validation for automotive use, and optimized SMT manufacturability - making it the preferred choice for volume automotive and industrial power electronics requiring guaranteed reliability and process compatibility.
Availability
1.5SMC56AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, DC-DC converter inputs, and motor drive gate protection requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC56AHE3_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, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified components.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments - balancing high pulse power, low clamping, and AEC-Q101 compliance for next-generation automotive and industrial power systems.
FAQ
What is the clamping voltage of the 1.5SMC56AHE3_A/I under full-rated surge current?
The 1.5SMC56AHE3_A/I has a maximum clamping voltage (VC) of 77.0 V when subjected to its rated peak pulse current (IPPM) of 19.5 A under the standard 10/1000 μs waveform. This value is measured per Vishay's datasheet Figure 1 and Table on page 2, and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 1.5SMC56AHE3_A/I maintains this clamping performance consistently due to its glass-passivated avalanche junction and low dynamic impedance.
Is the 1.5SMC56AHE3_A/I qualified for automotive applications?
Yes, the 1.5SMC56AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering information table (page 3) and product marking convention ("HE3" denotes RoHS-compliant + AEC-Q101 qualification). This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD, validating its use in automotive powertrain, body electronics, and ADAS subsystems where reliability under extended temperature ranges (–65 °C to +150 °C) is mandatory. The 1.5SMC56AHE3_A/I meets these requirements without derating.
What does the "HE3_A/I" suffix mean in 1.5SMC56AHE3_A/I?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification; "A" denotes the revision level of the device's electrical characteristics; and "I" specifies packaging in 13-inch diameter plastic tape and reel with 3500 units per reel. This matches Vishay's ordering nomenclature on page 3 of document 88303. The 1.5SMC56AHE3_A/I is therefore supplied in high-volume SMT-ready format, fully traceable, and compliant with automotive supply chain requirements including PPAP documentation readiness.
How does the thermal performance of the 1.5SMC56AHE3_A/I compare to similar TVS diodes?
The 1.5SMC56AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" copper pads - lower than SMB-package alternatives like SMBJ56A-E3/52T (RθJA = 85 °C/W). This enables higher sustained power dissipation (6.5 W at TA = 50 °C) and better thermal stability during repetitive surge events. The 1.5SMC56AHE3_A/I's SMC package also provides greater thermal mass than smaller packages, improving reliability in thermally demanding automotive under-hood applications.
Can the 1.5SMC56AHE3_A/I be used in bidirectional configurations?
No, the 1.5SMC56AHE3_A/I is strictly unidirectional, as indicated by its "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., 1.5SMC56CA). Using the 1.5SMC56AHE3_A/I in bidirectional circuits would result in forward conduction during negative transients, potentially causing failure or incorrect clamping behavior. For AC or dual-polarity signal protection, select a verified bidirectional part such as 1.5SMC56CAHE3_A/I - the 1.5SMC56AHE3_A/I must be applied with correct polarity alignment to function as intended.
1.5SMC56AHE3_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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 19.5A
- 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)
1.5SMC56AHE3_A/I FAQ
1.How can I place an order for 1.5SMC56AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56AHE3_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 1.5SMC56AHE3_A/I reliable?
The price and inventory of 1.5SMC56AHE3_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 1.5SMC56AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC56AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56AHE3_A/I?
1.5SMC56AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56AHE3_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 1.5SMC56AHE3_A/I?
For technical support, including 1.5SMC56AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC56AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56AHE3_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 1.5SMC56AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC56AHE3_A/I?
All 1.5SMC56AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56AHE3_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 1.5SMC56AHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC56AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56AHE3_A/I Tags
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