My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T68CAHE3_A/H
- Part No.:
- SM15T68CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68CAHE3_A/H.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,717
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T68CAHE3_A/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 breakdown voltage (VBR = 64.6–71.4 V), and clamping voltage of 92.0 V at 16.3 A. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and switching transients.
For engineers reviewing the SM15T68CAHE3_A/H datasheet, SM15T68CAHE3_A/H pinout, SM15T68CAHE3_A/H application, or SM15T68CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.37), and compatibility with high-source-impedance transient threats per IEC 61000-4-5.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal bias it presents <1 μA leakage at 58.1 V stand-off (VWM), then avalanches symmetrically in both directions above 64.6 V to clamp transients within 92.0 V at 16.3 A. Its glass-passivated junction ensures stable breakdown and low inductance for fast response.
Designed for surface-mount placement on PCBs with minimum 8.0 mm × 8.0 mm copper pads per terminal, it sustains 150 °C maximum junction temperature and meets MSL Level 1 reflow (260 °C peak). The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe DC/AC working margin. |
| VBR (min/max) | 64.6 V / 71.4 V - Breakdown occurs within this range at 1 mA test current; ensures consistent avalanche initiation across production lot. |
| VC @ IPPM | 92.0 V @ 16.3 A - Clamped voltage during 10/1000 μs transient; determines protected circuit's maximum overvoltage exposure. |
| PPPM | 1500 W - Peak pulse power handling per single transient; validates suitability for lightning surge (IEC 61000-4-5 Level 3/4). |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood automotive environments without derating. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard pad layout; informs board-level thermal design for repeated surges. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, footprint compatible with JEDEC DO-214AB standard. Bidirectional construction means no polarity marking; terminals are symmetrical anode/cathode pairs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient current entry point (bidirectional) | Accepts positive or negative surge current; connects to protected line without polarity constraint. |
| Cathode (Terminal 2) | Transient current return path (bidirectional) | Completes shunt path to ground or reference rail; identical electrical behavior to Terminal 1 in CA-series devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, RS-485) without external polarity management. |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces per stress test requirements. |
| 1500 W peak pulse rating | Withstands 10/1000 μs surges up to 16.3 A-sufficient for IEC 61000-4-5 4 kV coupling network tests on 2 Ω source impedance. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices, preserving MOSFET gate oxide integrity. |
| MSL Level 1 reflow compatibility | Supports lead-free reflow up to 260 °C peak without delamination or parameter shift-enables high-yield automated assembly. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs in body control modules exposed to load-dump and jump-start transients. IC Role / Device Role / Timing Role: Shunt clamping element placed between signal line and chassis ground to divert >1 kV transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to transceivers by limiting voltage to ≤92.0 V during 16.3 A surge events. |
Use Scenario: Safeguarding analog input channels of PLC analog I/O modules connected to field sensors via long cables. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on differential pair or single-ended signal line to suppress EFT/burst and surge noise. Use Value: Maintains signal fidelity by clamping induced transients before they corrupt ADC sampling or trigger false logic states. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Front-end protection of Ethernet PHY magnetics or DSL line drivers subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Common-mode TVS across transformer secondary windings to absorb coupled energy without saturating core. Use Value: Achieves >4 kV IEC 61000-4-5 immunity while maintaining <1 pF junction capacitance to avoid signal integrity degradation. |
Use Scenario: Secondary-side overvoltage suppression on 12 V/24 V DC outputs of wall adapters used in smart home hubs. IC Role / Device Role / Timing Role: Fast-response shunt limiter placed after rectifier and bulk capacitor to clamp output rail spikes. Use Value: Limits output overshoot to ≤92.0 V during capacitor discharge or regulator fault, protecting connected USB peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68CA | Lower peak power (400 W), smaller SMA package (DO-214AC), higher clamping voltage (110 V @ 5.8 A) | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy ESD/EFT scenarios | Select when space-constrained layouts preclude SMC and surge threat level is ≤1 kV. |
| SMCJ68CA | Same SMC package, higher peak power (1500 W), tighter VBR tolerance (64.6–71.4 V vs. 64.6–71.4 V), identical clamping (92.0 V) | Non-AEC-Q101; commercial grade only; lacks automotive qualification documentation | Choose for cost-sensitive industrial designs where AEC-Q101 is not mandated. |
Compared with SMAJ68CA and SMCJ68CA, SM15T68CAHE3_A/H uniquely combines AEC-Q101 qualification, 1500 W capability, and bidirectional symmetry in a single SMC-footprint device-making it the only option validated for automotive front-end protection requiring both reliability and high-energy robustness.
Availability
SM15T68CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SM15T68CAHE3_A/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 diodes, rectifiers, and transient protection devices with emphasis on reliability and application-specific performance.
The SM15T Series was developed to deliver high-power, AEC-Q101-qualified TVS protection for automotive and industrial systems where failure modes must be controlled and surge immunity must meet stringent international standards.
FAQ
What does the "CA" suffix indicate in SM15T68CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration: SM15T68CAHE3_A/H clamps voltage symmetrically in both polarities, making it suitable for AC-coupled or floating signal lines like CAN bus or RS-485. Unlike unidirectional "A" variants, it has no cathode band marking and exhibits identical VBR and VC characteristics for positive and negative transients.
Is SM15T68CAHE3_A/H qualified for automotive use?
Yes, SM15T68CAHE3_A/H carries the HE3 suffix, which explicitly indicates RoHS compliance and full AEC-Q101 qualification. This includes stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life-validating its use in engine control units, ADAS sensors, and body electronics.
What is the maximum clamping voltage of SM15T68CAHE3_A/H under surge conditions?
The maximum clamping voltage of SM15T68CAHE3_A/H is 92.0 V when subjected to a 10/1000 μs waveform at its peak pulse current of 16.3 A. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
How does SM15T68CAHE3_A/H differ from SM15T68AHE3_A/H?
SM15T68CAHE3_A/H is bidirectional, while SM15T68AHE3_A/H is unidirectional. The "CA" version clamps equally for both polarities and has no polarity marking; the "A" version features a cathode band and conducts only in reverse bias. Their VBR, VC, and PPPM values are otherwise identical, but circuit topology dictates which variant is appropriate.
What PCB layout guidance applies to SM15T68CAHE3_A/H for optimal surge performance?
Vishay specifies mounting SM15T68CAHE3_A/H on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W pulse power. Traces to ground must be short and wide to minimize inductance; thermal vias under pads improve heat dissipation during repetitive surges. Avoid routing sensitive traces near the device body.
SM15T68CAHE3_A/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:
- Active
- 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 (SMCJ)
SM15T68CAHE3_A/H FAQ
1.How can I place an order for SM15T68CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68CAHE3_A/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 SM15T68CAHE3_A/H reliable?
The price and inventory of SM15T68CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T68CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68CAHE3_A/H?
SM15T68CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68CAHE3_A/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 SM15T68CAHE3_A/H?
For technical support, including SM15T68CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68CAHE3_A/H requirements.
6.How does Aetrix verify that SM15T68CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T68CAHE3_A/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 SM15T68CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T68CAHE3_A/H?
All SM15T68CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68CAHE3_A/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 SM15T68CAHE3_A/H part is unused and in its original packaging.
Return procedure for SM15T68CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68CAHE3_A/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
