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Vishay General Semiconductor - Diodes Division 1.5SMC68AHM3/I
- Part No.:
- 1.5SMC68AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68AHM3/I.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,114
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Product details
Overview
1.5SMC68AHM3/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. It features a 68 V breakdown voltage (VBR = 64.6–71.4 V at 1 mA), 58.1 V stand-off voltage (VWM), and clamps transients to ≤92.0 V at 16.3 A peak pulse current (IPPM) under 10/1000 µs waveform - deployed in automotive power line and industrial sensor interface protection.
For engineers reviewing the 1.5SMC68AHM3/I datasheet, 1.5SMC68AHM3/I pinout, 1.5SMC68AHM3/I application, or 1.5SMC68AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), 1500 W peak pulse power rating, and unidirectional polarity with cathode band marking - critical for ESD and lightning-induced transient suppression in safety-critical embedded systems.
Technical Context
This device operates as a clamping-type TVS diode: when reverse-biased voltage exceeds VWM (58.1 V), it enters avalanche breakdown at VBR (64.6–71.4 V), limiting transient voltage to ≤92.0 V at IPPM. Its low incremental surge resistance ensures stable clamping under repetitive surges up to 0.01% duty cycle.
Thermally, it supports operation from −65 °C to +150 °C junction temperature, with RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable performance on standard 8.0 mm × 8.0 mm copper pads per terminal - validated per J-STD-020 MSL level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC working margin. |
| VBR @ IT = 1 mA | 64.6–71.4 V - precise avalanche initiation range; ensures consistent turn-on across production lots. |
| VC @ IPPM = 16.3 A | ≤92.0 V - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM | 1500 W - peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| IFSM | 200 A - 8.3 ms single half-sine surge current rating; supports high-energy inductive switching events. |
| TJ max | +150 °C - maximum junction temperature; allows operation in under-hood automotive and industrial environments. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.13 mm × 6.22 mm footprint and 3.20 mm height; compatible with automated placement. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference in TVS configuration. | Provides low-forward-voltage path (<3.5 V @ 100 A) during fault conditions; must be routed to lowest-impedance ground plane. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to protected line (e.g., 12 V rail, CAN bus, sensor input). | Defines clamping polarity - reverse-biased during overvoltage; band orientation must match PCB silkscreen for error-proof assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, body electronics, and ADAS power rails. |
| Halogen-free & RoHS-compliant (HM3) | Meets IEC 61249-2-21 and JEDEC J-STD-20 requirements; eliminates brominated flame retardants without compromising UL 94 V-0 flammability rating. |
| 1500 W peak pulse power (10/1000 µs) | Withstands repeated high-energy transients typical of ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Combination Wave surges. |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes voltage overshoot during clamping - reduces risk of downstream IC latch-up or gate oxide damage in MOSFET drivers and microcontrollers. |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without moisture sensitivity concerns - eliminates bake requirements and streamlines SMT manufacturing. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 58.1 V. Use Value: Limits peak voltage to ≤92.0 V during 1500 W pulses, preventing damage to LDOs, CAN transceivers, and MCU power inputs. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS used across differential signal pairs to suppress ESD and cable discharge events. Use Value: Responds in <1 ps to fast transients, maintaining signal integrity while surviving >20 kV contact ESD per IEC 61000-4-2. |
| Telecom DC Power Input | Consumer Appliance Motor Control |
Use Scenario: Guarding 48 V PoE-powered equipment inputs against lightning-induced surges on outdoor Ethernet lines. IC Role / Device Role / Timing Role: Primary clamping device on DC input stage, coordinated with upstream GDT and downstream π-filter. Use Value: Delivers 1500 W pulse handling with ≤92.0 V clamping - ensures compliance with IEC 61000-4-5 Level 4 (4 kV line-earth). |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Mounted across motor terminals to absorb back-EMF energy during PWM commutation. Use Value: Withstands 200 A non-repetitive surge (8.3 ms) and maintains stable clamping over 1000+ cycles without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ68A-E3/52T | Same VWM (58.1 V) and VC (92.0 V), but lower PPPM = 600 W and SMB (DO-214AA) package (smaller footprint, higher thermal resistance). | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use where automotive reliability is not required. | Select when board space is constrained and surge energy is ≤600 W - verify thermal derating on 5.0 mm × 5.0 mm pads. |
| 1.5KE68A | Through-hole TO-204AA (DO-41) package; identical electrical specs but higher RθJA (~100 °C/W) and no MSL level 1 rating. | Requires wave soldering or hand assembly; unsuitable for fully automated SMT lines or high-reliability automotive reflow profiles. | Choose only for legacy through-hole designs or prototyping where rework flexibility outweighs production efficiency and AEC-Q101 needs. |
Compared with SMBJ68A-E3/52T and 1.5KE68A, the 1.5SMC68AHM3/I delivers superior automotive-grade reliability, higher surge capacity (1500 W vs. 600 W or 1500 W with inferior thermal performance), and full SMT compatibility - making it the optimal choice for volume-manufactured automotive and industrial electronics requiring zero rework and long-term supply stability.
Availability
1.5SMC68AHM3/I is available at Aetrix Electronics and suitable for automotive ECU power protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC68AHM3/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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments - emphasizing AEC-Q101 qualification, halogen-free compliance, and repeatable clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of the 1.5SMC68AHM3/I under maximum rated surge current?
The 1.5SMC68AHM3/I clamps to a maximum of 92.0 V when subjected to its rated peak pulse current of 16.3 A under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on recommended 8.0 mm × 8.0 mm copper pads and represents the upper limit of voltage seen by downstream circuitry during surge events - critical for ensuring compatibility with 75 V-rated components.
Is the 1.5SMC68AHM3/I qualified for automotive applications?
Yes, the 1.5SMC68AHM3/I carries the HM3 suffix, indicating it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. It has passed rigorous automotive stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD - making it suitable for under-hood and body-control module applications per ISO/TS 16949 requirements.
What does the "HM3" suffix mean in 1.5SMC68AHM3/I?
The "HM3" suffix in 1.5SMC68AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates halogen-free molding compound meeting IEC 61249-2-21, "M3" confirms RoHS compliance and JESD 201 Class 2 whisker resistance, and "I" specifies 3500-unit tape-and-reel packaging on 13-inch reels - all verified per Vishay Document Number 88303.
How does the 1.5SMC68AHM3/I compare to bidirectional TVS diodes like 1.5SMC68CA?
The 1.5SMC68AHM3/I is unidirectional and features a cathode band for polarity identification, whereas 1.5SMC68CA is bidirectional with no polarity marking. Both share identical VWM, VBR, and VC ratings, but the unidirectional 1.5SMC68AHM3/I offers lower leakage current (<1 μA at VWM) and is preferred for DC power rail protection, while the bidirectional variant suits AC or differential signal lines.
What is the thermal resistance of the 1.5SMC68AHM3/I, and how does it affect layout design?
The 1.5SMC68AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-leads (RθJL) of 15 °C/W. To achieve rated power dissipation, PCB layout must use minimum 8.0 mm × 8.0 mm copper pads per terminal - reducing thermal impedance and preventing junction temperature exceedance during repetitive surges or elevated ambient conditions.
1.5SMC68AHM3/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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC68AHM3/I FAQ
1.How can I place an order for 1.5SMC68AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68AHM3/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 1.5SMC68AHM3/I reliable?
The price and inventory of 1.5SMC68AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC68AHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC68AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68AHM3/I?
1.5SMC68AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68AHM3/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 1.5SMC68AHM3/I?
For technical support, including 1.5SMC68AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68AHM3/I requirements.
6.How does Aetrix verify that 1.5SMC68AHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68AHM3/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 1.5SMC68AHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC68AHM3/I?
All 1.5SMC68AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68AHM3/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 1.5SMC68AHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC68AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC68AHM3/I Tags
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