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Vishay General Semiconductor - Diodes Division SM15T68CAHM3/H
- Part No.:
- SM15T68CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68CAHM3/H.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,656
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Product details
Overview
SM15T68CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 68 V standoff voltage (VWM = 58.1 V), 92 V clamping voltage at 16.3 A IPPM, and operating from −65 °C to +150 °C. It protects automotive sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T68CAHM3/H datasheet, SM15T68CAHM3/H pinout, SM15T68CAHM3/H application, or SM15T68CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and verified 1500 W surge handling on standard PCB pad layout.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical breakdown (VBR min/max = 64.6 V / 71.4 V at 1 mA), clamping (VC = 92 V at IPPM = 16.3 A), and leakage (ID ≤ 1 μA at VWM = 58.1 V). Its low-inductance SMC package and glass-passivated junction support fast response to sub-microsecond transients.
Thermal performance is defined by RθJA = 75 °C/W (on 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C. The device fails short-circuit under overstress - a predictable, system-safe failure mode confirmed per IEC 61000-4-5 testing conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains lightning-surge-level energy without degradation when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads |
| Standoff Voltage (VWM) | 58.1 V - maximum continuous reverse voltage before significant leakage; sets upper limit for protected circuit DC bias |
| Breakdown Voltage (VBR) | 64.6 V to 71.4 V at 1 mA - defines onset of avalanche conduction; tight 10% tolerance ensures consistent turn-on across production lots |
| Clamping Voltage (VC) | 92 V at IPPM = 16.3 A - limits transient voltage seen by downstream ICs; enables protection of 60 V-rated components |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive use and industrial environments without derating below TA = 25 °C |
| Package | SMC (DO-214AB) - surface-mount, low-profile package compatible with automated placement and reflow soldering per J-STD-020 MSL level 1 |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC-Q101 Rev D |
Pinout & Package
SM15T68CAHM3/H uses the SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, 0.305" × 0.220" footprint, and no polarity marking (bidirectional configuration). Terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking required; either terminal serves as anode or cathode depending on transient polarity - enables single-component protection of AC or differential lines |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse rating (10/1000 μs) | Validated clamping performance under IEC 61000-4-5 Level 4 surge (4 kV line-to-earth) with source impedance ≥ 2 Ω |
| Glass passivated chip junction | Stable VBR over lifetime; eliminates risk of moisture-induced parameter drift in humid or condensing environments |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets JEDEC JESD201 Class 2 whisker resistance and IPC-1752A material declaration requirements for automotive supply chains |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (< 1 ns rise time); critical for protecting high-speed CAN or LIN bus nodes |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking; reduces manufacturing complexity and cost |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load-dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, responding within < 1 ns to limit transient excursions to ≤ 92 V. Use Value: Prevents latch-up or permanent damage to 16-bit ADC inputs and microcontroller GPIOs rated for 65 V absolute maximum. |
Use Scenario: Safeguarding 24 V DC digital input modules in factory automation cabinets subject to relay-coil switching noise and nearby arc welding events. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across input terminals to shunt induced surges before reaching optocoupler input stages. Use Value: Maintains functional safety integrity (IEC 61000-4-4/5 compliant) while eliminating need for external series impedance or RC snubbers. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceiver data lines in outdoor security camera hubs from induced surges via long unshielded cable runs. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) referenced to common ground, leveraging symmetrical clamping to preserve signal integrity. Use Value: Enables > 100,000 surge cycles without parameter shift - verified per Telcordia GR-1089-CORE Zone 3 test conditions. |
Use Scenario: Suppressing commutation spikes from universal motor brushes in washing machine control boards during speed transitions. IC Role / Device Role / Timing Role: Low-inductance bidirectional clamp placed across motor terminals to absorb stored inductive energy during MOSFET turn-off. Use Value: Reduces EMI radiated emissions by >15 dB at 30–230 MHz, helping meet CISPR 14-1 Class B limits without added ferrites. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ64CA | Same SMC package, 64 V VWM, 1500 W rating, but VBR = 71.1–78.6 V and VC = 103 V at 14.6 A - higher clamping voltage and looser VBR tolerance | Marginally lower protection level for 60 V-rated circuits; requires verification of downstream component margin vs. 103 V VC | Select when legacy Littelfuse sourcing or dual-sourcing strategy mandates cross-manufacturer compatibility with minimal redesign |
| ON Semiconductor 1.5SMC68CA | Identical electrical specs (VWM = 58.1 V, VBR = 64.6–71.4 V, VC = 92 V), same SMC package, but AEC-Q101 not explicitly stated in datasheet revision 2023-09 | Not certified for automotive use unless customer performs independent AEC-Q101 qualification; unsuitable for OEM Tier 1 production without validation | Prefer for commercial/industrial designs where AEC-Q101 is not mandated, especially when ON Semi supply chain advantages apply |
Compared with SMAJ64CA and 1.5SMC68CA, SM15T68CAHM3/H delivers tighter VBR tolerance (±5%), guaranteed AEC-Q101 qualification, and halogen-free compliance - making it the only option qualified for automotive production without additional reliability testing.
Availability
SM15T68CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer appliance motor controls requiring stable component supply and full AEC-Q101 traceability.
Supply support for SM15T68CAHM3/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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SM15T Series was engineered specifically for robust transient suppression in harsh environments - emphasizing AEC-Q101 qualification, low clamping variance, and fail-safe short-circuit behavior in automotive and industrial control systems.
FAQ
What is the clamping voltage of SM15T68CAHM3/H at its rated peak pulse current?
The SM15T68CAHM3/H has a maximum clamping voltage (VC) of 92 V when subjected to its peak pulse current (IPPM) of 16.3 A using a 10/1000 μs waveform. This value is measured under standardized test conditions with the device mounted on 8.0 mm × 8.0 mm copper pads, ensuring repeatable system-level protection performance for 60 V-rated downstream components.
Is SM15T68CAHM3/H qualified for automotive applications?
Yes, SM15T68CAHM3/H is AEC-Q101 qualified, as indicated by the "HM3" suffix and confirmed in Vishay's official documentation (Document Number: 88380, Revision: 09-Jan-2024). It meets stress tests including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D, making it suitable for under-hood and body-control module deployments.
What does the "CA" suffix signify in SM15T68CAHM3/H?
The "CA" suffix in SM15T68CAHM3/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM15T68AHM3/H), it has no polarity marking and functions identically regardless of terminal orientation in the circuit.
What is the standoff voltage (VWM) rating of SM15T68CAHM3/H?
The standoff voltage (VWM) of SM15T68CAHM3/H is 58.1 V - the maximum DC or continuous reverse working voltage the device can withstand without exceeding 1 μA leakage current. This rating ensures compatibility with 48 V and 60 V nominal systems while maintaining sufficient margin below the 64.6 V minimum breakdown voltage.
Does SM15T68CAHM3/H require special PCB layout considerations?
Yes - optimal performance requires mounting SM15T68CAHM3/H on minimum 8.0 mm × 8.0 mm copper pads per terminal, as specified in Vishay's thermal characterization. Smaller pads increase thermal resistance and reduce peak pulse power handling; routing traces directly to the pads (no vias or narrow necks) preserves low-inductance path integrity for effective transient shunting.
SM15T68CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SM15T68CAHM3/H FAQ
1.How can I place an order for SM15T68CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68CAHM3/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 SM15T68CAHM3/H reliable?
The price and inventory of SM15T68CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68CAHM3/H is usually 5 days.
3.What payment methods are accepted for SM15T68CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68CAHM3/H?
SM15T68CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68CAHM3/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 SM15T68CAHM3/H?
For technical support, including SM15T68CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68CAHM3/H requirements.
6.How does Aetrix verify that SM15T68CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SM15T68CAHM3/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 SM15T68CAHM3/H meets industry standards.
7.What is the process for return or replacement of SM15T68CAHM3/H?
All SM15T68CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68CAHM3/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 SM15T68CAHM3/H part is unused and in its original packaging.
Return procedure for SM15T68CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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