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Vishay General Semiconductor - Diodes Division 1.5SMC68A-E3/57T
- Part No.:
- 1.5SMC68A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68A-E3/57T.pdf
- Description:
- TVS DIODE 58.1VWM 92VC SMC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5SMC68A-E3/57T 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 68 V breakdown voltage (VBR = 64.6–71.4 V at 1 mA), 58.1 V stand-off voltage (VWM), 92.0 V maximum clamping voltage (VC) at 16.3 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC68A-E3/57T datasheet, 1.5SMC68A-E3/57T pinout, 1.5SMC68A-E3/57T application, or 1.5SMC68A-E3/57T equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, clamping performance under 10/1000 µs transients, thermal resistance (RθJA = 75 °C/W), and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM (58.1 V), it transitions from high-impedance blocking to low-impedance conduction, limiting downstream voltage to ≤92.0 V at 16.3 A. Its glass-passivated junction ensures stable avalanche behavior and fast response (<1 ns).
Rated for 1500 W peak pulse power (10/1000 µs), it sustains repetitive surges at 0.01% duty cycle and derates linearly above 25 °C ambient per Fig. 2. Thermal resistance of 75 °C/W (junction-to-ambient, on 8 mm × 8 mm copper pads) supports reliable operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1 mA - defines precise avalanche initiation window for repeatable clamping threshold |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 92.0 V at 16.3 A - clamped voltage during worst-case 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak transient power handling capacity, enabling protection against lightning-induced surges per IEC 61000-4-5 |
| RθJA | 75 °C/W - thermal resistance determines safe power dissipation limit on standard PCB copper pads |
| TJ max. | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - surface-mount outline with 8.13 mm × 6.22 mm footprint and 2.62 mm height, compatible with automated placement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak). Polarity indicated by cathode band; anode and cathode terminals are axially oriented along the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection in unidirectional configuration | Connected to protected line; conducts surge current to ground when VREV > VWM |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes low-impedance shunt path during transient events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV surge) without external series impedance |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| MSL Level 1 rating | Supports lead-free reflow assembly without pre-baking, reducing manufacturing complexity |
| AEC-Q101 qualification option | Available in HE3 suffix variant for automotive-grade reliability in engine control and ADAS sensor modules |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground, clamping transients before they reach the transceiver ESD structure. Use Value: Limits induced voltage to ≤92.0 V during 10/1000 µs surges, preserving signal integrity and preventing latch-up in 5 V tolerant interfaces. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring faults and inductive kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact or PNP/NPN input channels, mounted upstream of optocoupler or Schmitt trigger input stage. Use Value: Absorbs up to 1500 W transient energy without degradation, maintaining input logic state fidelity during 400 V/12 A surge events. |
| Telecom Power Supply Rail | Consumer Appliance Motor Control |
Use Scenario: Secondary-side transient suppression on +48 V telecom power distribution boards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS across bulk capacitor output rail, triggered only during overvoltage excursions exceeding 58.1 V. Use Value: Clamps rail voltage to 92.0 V within <1 ns, preventing damage to downstream DC-DC converters and PMICs rated for 60 V max input. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers in washing machine motor inverters from back-EMF spikes during brushless DC motor commutation. IC Role / Device Role / Timing Role: Localized TVS on half-bridge driver supply rails and feedback sensing nodes, placed adjacent to MOSFET source pins. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), surviving repeated motor stall conditions without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | Lower PPPM (600 W), same VWM (58.1 V), SMB package (smaller footprint, higher RθJA) | Less robust for IEC 61000-4-5 Level 4; suitable for space-constrained consumer electronics | Select when board area is critical and surge threat level is limited to IEC 61000-4-5 Level 2 |
| 1.5KE68A | Same VBR/VC, axial leaded DO-201 package, higher RθJA (~100 °C/W), no MSL rating | Not suitable for automated SMT assembly; requires through-hole rework and manual inspection | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ64A and 1.5KE68A, the 1.5SMC68A-E3/57T delivers superior surge robustness (1500 W vs. 600 W or 1500 W with inferior thermal management), full SMT process compatibility, and verified MSL Level 1 handling - making it optimal for high-reliability industrial and automotive production.
Availability
1.5SMC68A-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power distribution, and appliance motor control systems requiring stable component supply, RoHS-compliant sourcing, and consistent SMC (DO-214AB) packaging.
Supply support for 1.5SMC68A-E3/57T 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated without compromising board space or assembly yield.
FAQ
What is the clamping voltage of the 1.5SMC68A-E3/57T under a 10/1000 µs surge?
The 1.5SMC68A-E3/57T has a maximum clamping voltage (VC) of 92.0 V at 16.3 A peak pulse current (IPPM) under a standardized 10/1000 µs waveform. This value is measured per Fig. 1 and Fig. 3 in the Vishay datasheet (Doc. #88303), and represents the upper bound of voltage seen by downstream circuitry during worst-case transient events. The 1.5SMC68A-E3/57T maintains this clamping performance across its qualified operating temperature range.
Is the 1.5SMC68A-E3/57T RoHS-compliant and halogen-free?
Yes, the 1.5SMC68A-E3/57T carries the "E3" suffix, indicating RoHS-compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., 1.5SMC68A-M3/57T) must be selected. Both E3 and M3 versions meet JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
Does the 1.5SMC68A-E3/57T have AEC-Q101 qualification?
The base 1.5SMC68A-E3/57T is not AEC-Q101 qualified; however, Vishay offers the automotive-grade variant 1.5SMC68AHE3_A/H (with "HE3" suffix and revision code "A"), which is fully AEC-Q101 qualified for use in automotive applications. The 1.5SMC68A-E3/57T shares identical electrical characteristics and SMC packaging but lacks the extended reliability testing required for automotive qualification.
What is the thermal resistance of the 1.5SMC68A-E3/57T, and how does it affect layout?
The 1.5SMC68A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal, as specified in the Vishay datasheet. This value assumes minimum recommended pad layout (Fig. 5); reducing pad size increases RθJA, potentially limiting safe power dissipation. Layout must maintain ≥8 mm² copper area per terminal to achieve rated 1500 W pulse capability and prevent thermal runaway during repetitive surges.
How does the 1.5SMC68A-E3/57T differ from bidirectional variants like 1.5SMC68CA?
The 1.5SMC68A-E3/57T is unidirectional, with polarity marked by a cathode band and intended for DC-biased lines where reverse conduction is undesirable. In contrast, 1.5SMC68CA is bidirectional, symmetrical in both directions, and used in AC-coupled or floating signal paths (e.g., RS-485, USB D+/D−). Their VBR, VWM, and VC values differ: 1.5SMC68CA has VWM = 58.1 V (same), but VBR = 64.6–71.4 V in both polarities and VC = 92.0 V at 16.3 A in either direction - whereas the 1.5SMC68A-E3/57T only clamps in reverse bias.
1.5SMC68A-E3/57T 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 16.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC68A-E3/57T FAQ
1.How can I place an order for 1.5SMC68A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68A-E3/57T 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 1.5SMC68A-E3/57T reliable?
The price and inventory of 1.5SMC68A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC68A-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC68A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68A-E3/57T?
1.5SMC68A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68A-E3/57T 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 1.5SMC68A-E3/57T?
For technical support, including 1.5SMC68A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC68A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68A-E3/57T 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 1.5SMC68A-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC68A-E3/57T?
All 1.5SMC68A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68A-E3/57T, 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 1.5SMC68A-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC68A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC68A-E3/57T Tags
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