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Vishay General Semiconductor - Diodes Division 1.5SMC56AHE3/57T
- Part No.:
- 1.5SMC56AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56AHE3/57T.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,468
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Product details
Overview
1.5SMC56AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 56 V standoff voltage (VWM), 77.0 V maximum clamping voltage (VC) at 19.5 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 μs). It protects MOSFETs, ICs, and sensor signal lines against lightning-induced transients and inductive switching surges in automotive and industrial power electronics.
For engineers reviewing the 1.5SMC56AHE3/57T datasheet, 1.5SMC56AHE3/57T pinout, 1.5SMC56AHE3/57T application, or 1.5SMC56AHE3/57T equivalent, this AEC-Q101 qualified TVS offers verified clamping performance, low incremental surge resistance, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly and high-reliability automotive ECUs.
Technical Context
This unidirectional TVS operates by avalanche breakdown above its 53.2–58.8 V breakdown voltage (VBR at 1 mA), with fast sub-nanosecond response to transient overvoltages. Its glass-passivated junction ensures stable leakage (<1.0 μA at 47.8 V) and robust surge handling under repetitive 0.01% duty cycle conditions.
Thermally, it features a junction-to-ambient thermal resistance of 75 °C/W and a maximum operating junction temperature of +150 °C. The device is mounted on 8.0 mm × 8.0 mm copper pads per terminal to sustain 1500 W peak pulse power without derating at TA = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 47.8 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 53.2–58.8 V at 1 mA - Verified avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping) | 77.0 V at 19.5 A - Peak voltage seen by protected circuit during 10/1000 μs surge; limits stress on downstream components. |
| PPPM | 1500 W - Sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2b) without failure when properly mounted. |
| IPPM | 19.5 A - Peak surge current capability under standard 10/1000 μs waveform; correlates directly with VC and energy absorption. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 8.13 mm × 6.22 mm footprint and 3.20 mm height; compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices. Mounting requires 8.0 mm × 8.0 mm copper pads per terminal per Vishay specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference in unidirectional TVS configuration. | Provides return path for surge current during reverse-transient clamping; must be routed with low-inductance ground plane. |
| Cathode | Protected line connection; marked with band; reverse-biased during normal operation. | Connected to I/O line, power rail, or signal trace requiring protection; clamps to VC when transient exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; supports use in engine control units and ADAS sensors. |
| 1500 W peak pulse power | Withstands high-energy transients per ISO 7637-2 and IEC 61000-4-5 without degradation when mounted per recommended pad layout. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 μA), and long-term parameter stability under thermal stress. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD), improving protection margin for sensitive CMOS interfaces. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller inputs and CAN transceiver power rails against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, clamping transients before they reach LDO regulators and MCU pins. Use Value: Limits clamped voltage to 77.0 V, well below typical 36 V absolute maximum ratings of automotive-grade LDOs and MCUs. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors from ESD and field wiring surges. IC Role / Device Role / Timing Role: TVS installed across sensor output and ground, absorbing fast transients while preserving signal integrity via low capacitance. Use Value: Sub-nanosecond response prevents latch-up in op-amp front-ends; <1 μA leakage avoids offset error in precision current loops. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeds |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters after rectification but before primary-side controller feedback. IC Role / Device Role / Timing Role: Clamps flyback transformer leakage spikes and rectifier reverse recovery transients on +5 V/+12 V outputs. Use Value: 1500 W rating handles repetitive 10/1000 μs surges common in low-cost adapter designs without thermal runaway. |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras, wireless APs) from induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: TVS placed at DC jack input, shunting surge energy to chassis ground before reaching PD controller ICs. Use Value: 77.0 V clamping ensures protected ICs (e.g., IEEE 802.3af/at controllers) remain within 100 V absolute max rating under worst-case surge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A-E3/52 | Same VWM (47.8 V) and VC (77 V), but lower PPPM (600 W); SMB package (smaller footprint, higher RθJA = 110 °C/W). | Preferred where board space is constrained and surge energy is limited to <600 W (e.g., USB port protection). | Select SMBJ56A-E3/52 only if thermal budget allows higher junction temperature rise and peak energy is ≤600 W. |
| 1.5KE56A-T | Through-hole DO-201 package; identical electrical specs but incompatible with SMT assembly; higher RθJA (60 °C/W on large pads). | Suitable for prototyping, repair, or legacy through-hole designs where rework flexibility is prioritized over automation. | Choose 1.5KE56A-T only for manual assembly or mixed-technology boards; not recommended for high-volume SMT production. |
Compared with SMBJ56A-E3/52 and 1.5KE56A-T, the 1.5SMC56AHE3/57T delivers full 1500 W surge capacity in an AEC-Q101 qualified SMC package optimized for automotive SMT lines, offering superior thermal performance and production readiness without layout redesign.
Availability
1.5SMC56AHE3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power feed protection requiring stable component supply, AEC-Q101 compliance, and high-reliability surge immunity.
Supply support for 1.5SMC56AHE3/57T 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, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power transient suppression in harsh environments-specifically targeting automotive, industrial, and telecom systems needing robust, surface-mountable TVS solutions with validated AEC-Q101 qualification.
FAQ
What is the clamping voltage of the 1.5SMC56AHE3/57T under a 10/1000 μs surge?
The 1.5SMC56AHE3/57T has a maximum clamping voltage (VC) of 77.0 V at 19.5 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal, as specified in Vishay document 88303. It reflects the actual voltage imposed on the protected circuit during worst-case transient events.
Is the 1.5SMC56AHE3/57T qualified for automotive applications?
Yes, the 1.5SMC56AHE3/57T carries AEC-Q101 qualification, confirmed by its HE3 suffix and documentation in Vishay's 1.5SMC series datasheet (rev. 09-Mar-2026). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per automotive reliability standards, making it suitable for engine control, body electronics, and ADAS subsystems.
What is the standoff voltage (VWM) and why does it matter for the 1.5SMC56AHE3/57T?
The 1.5SMC56AHE3/57T has a standoff voltage (VWM) of 47.8 V, meaning it remains non-conductive up to this reverse voltage during normal operation. This parameter ensures no leakage current interferes with 48 V nominal systems or 5 V/12 V logic rails, while maintaining sufficient margin below the 53.2–58.8 V breakdown range to prevent false triggering during voltage ripple or noise.
Does the 1.5SMC56AHE3/57T have a defined polarity, and how is it identified?
Yes, the 1.5SMC56AHE3/57T is unidirectional and features explicit polarity: the cathode is marked by a visible band on the SMC (DO-214AB) package body. During PCB layout, the banded end must connect to the line being protected (e.g., +12 V rail), while the anode connects to ground-reversing this orientation disables transient suppression functionality.
What is the thermal resistance and maximum junction temperature of the 1.5SMC56AHE3/57T?
The 1.5SMC56AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted per Vishay's recommended 8.0 mm × 8.0 mm pad layout, and a maximum junction temperature (TJ) of +150 °C. These values enable reliable operation in under-hood automotive environments and sealed industrial enclosures without active cooling.
1.5SMC56AHE3/57T 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):
- 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)
1.5SMC56AHE3/57T FAQ
1.How can I place an order for 1.5SMC56AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56AHE3/57T 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 1.5SMC56AHE3/57T reliable?
The price and inventory of 1.5SMC56AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56AHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC56AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56AHE3/57T?
1.5SMC56AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56AHE3/57T 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 1.5SMC56AHE3/57T?
For technical support, including 1.5SMC56AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56AHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC56AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56AHE3/57T 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 1.5SMC56AHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC56AHE3/57T?
All 1.5SMC56AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56AHE3/57T, 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 1.5SMC56AHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC56AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56AHE3/57T Tags
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