My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC56CAHE3/9AT
- Part No.:
- 1.5SMC56CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56CAHE3/9AT.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC56CAHE3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 56 V standoff voltage (VWM), 62.2–68.8 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 μs), clamping voltage of 93.6 V at 19.5 A, and operates across –65 °C to +150 °C. It is used to protect automotive sensor interfaces and industrial I/O lines against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5SMC56CAHE3/9AT datasheet, 1.5SMC56CAHE3/9AT pinout, 1.5SMC56CAHE3/9AT application, or 1.5SMC56CAHE3/9AT equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, DO-214AB package thermal performance, and compliance with UL 497B surge protector requirements.
Technical Context
This device functions as a voltage-clamped shunt protector: during transient events exceeding its breakdown threshold, it rapidly switches from high-impedance to low-impedance state, diverting surge current away from downstream circuitry while limiting voltage across protected nodes to ≤93.6 V. Its bidirectional symmetry enables use on AC-coupled or floating signal paths without polarity concerns.
It employs a glass-passivated silicon junction for stable avalanche behavior, achieves <1 ns response time, and maintains low incremental surge resistance to minimize clamping overshoot. The SMC (DO-214AB) package supports 6.5 W steady-state power dissipation at 50 °C with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation under repetitive surge conditions at ≤0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 56 V - Maximum continuous reverse working voltage before conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 62.2–68.8 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping) | 93.6 V at 19.5 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines safe margin for downstream ICs. |
| PPPM | 1500 W - Surge energy handling capacity per 10/1000 μs waveform; supports high-energy lightning and EFT events. |
| TJ max. | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive and industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per stress test plan. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal interface; RoHS-compliant matte tin terminations. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals serve identically as surge current entry/exit points; no DC polarity dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses, and floating nodes without external polarity management. |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when properly mounted on 8 mm × 8 mm copper pads. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS sensor modules requiring long-term field reliability. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow without preconditioning; eliminates moisture-related popcorning risk. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and ground to clamp transients before they reach precision amplifier or MCU ADC input. Use Value: Maintains signal integrity by limiting voltage to ≤93.6 V during 10/1000 μs surges up to 19.5 A, preventing latch-up or gate oxide damage in downstream ICs. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to factory floor EMI and relay switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across differential input pins to suppress common-mode and differential-mode transients simultaneously. Use Value: Enables uninterrupted operation during repetitive 1 kV/μs fast transients due to low clamping overshoot and <1 ns response time. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Secondary-Side Protection |
Use Scenario: Guarding Ethernet PHY interfaces and DSL line drivers against lightning-induced surges entering via RJ-45 jacks. IC Role / Device Role / Timing Role: Primary-level TVS on transformer-coupled data lines, coordinated with gas discharge tubes for staged protection. Use Value: UL 497B recognition confirms compliance for telecom surge protector classification, supporting system-level safety certification. |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters and AC/DC wall adapters subjected to output short-circuit recovery spikes. IC Role / Device Role / Timing Role: Fast-acting clamp across output capacitor to prevent >60 V excursion during MOSFET turn-off oscillation or feedback loop instability. Use Value: 56 V VWM provides sufficient margin above nominal 20 V output while ensuring clamping engages before secondary-side controller ICs exceed absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA | Lower PPPM (600 W), same VWM (58 V), SMB package (smaller thermal mass). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 without derating. | Select when board space is constrained and surge threat level is ≤Level 3 (2 kV). |
| 1.5KE56CA | Through-hole TO-204AA (DO-15), identical electrical specs but higher RθJA (100 °C/W). | Requires manual assembly or wave soldering; less suitable for high-volume SMT production. | Choose only for legacy through-hole designs or where reflow compatibility is not required. |
Compared with SMBJ58CA and 1.5KE56CA, the 1.5SMC56CAHE3/9AT delivers superior surge robustness in automated SMT layouts, combines AEC-Q101 qualification with UL 497B recognition, and offers optimal thermal performance for sustained industrial operation - making it the preferred choice for new automotive and industrial designs requiring certified, high-power TVS protection.
Availability
1.5SMC56CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line card surge protection requiring stable component supply, AEC-Q101 compliance, and UL-certified transient immunity.
Supply support for 1.5SMC56CAHE3/9AT 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, power efficiency, and application-specific validation.
The 1.5SMC Series was developed to deliver high-power, surface-mount TVS protection for automotive, industrial, and telecom systems where compact size, AEC-Q101 qualification, and repeatable clamping performance are mandatory.
FAQ
What does the "CA" suffix indicate in 1.5SMC56CAHE3/9AT?
The "CA" suffix in 1.5SMC56CAHE3/9AT denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. This eliminates polarity concerns during layout and enables use on AC-coupled or floating signal lines, unlike unidirectional variants (e.g., 1.5SMC56A) that require correct cathode orientation.
Is 1.5SMC56CAHE3/9AT qualified for automotive applications?
Yes, 1.5SMC56CAHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code "HE3". This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and surge endurance - validating its suitability for under-hood and chassis-mounted automotive electronics such as engine control sensors and ADAS camera modules.
What is the clamping voltage of 1.5SMC56CAHE3/9AT and why does it matter?
The clamping voltage (VC) of 1.5SMC56CAHE3/9AT is 93.6 V at 19.5 A (10/1000 μs waveform). This value represents the maximum voltage imposed on protected circuitry during a surge event. It matters because it must remain safely below the absolute maximum voltage rating of downstream components - for example, ensuring microcontrollers or transceivers rated for 100 V maximum are not overstressed during transient conditions.
How does the SMC (DO-214AB) package of 1.5SMC56CAHE3/9AT affect thermal performance?
The SMC (DO-214AB) package of 1.5SMC56CAHE3/9AT provides RθJA = 75 °C/W and RθJL = 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. This enables effective heat dissipation during repetitive surge events and supports 6.5 W steady-state power dissipation at 50 °C ambient - critical for maintaining reliability in enclosed industrial enclosures or automotive junction boxes where airflow is limited.
Does 1.5SMC56CAHE3/9AT meet UL safety standards?
Yes, 1.5SMC56CAHE3/9AT is recognized by Underwriters Laboratories under UL 497B (QVGQ2 file E136766) for surge protector classification. This certification confirms its suitability as a primary protection element in telecom, industrial, and automotive systems requiring third-party validation of transient suppression performance and failure mode safety.
1.5SMC56CAHE3/9AT 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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC56CAHE3/9AT FAQ
1.How can I place an order for 1.5SMC56CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56CAHE3/9AT 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 1.5SMC56CAHE3/9AT reliable?
The price and inventory of 1.5SMC56CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC56CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56CAHE3/9AT?
1.5SMC56CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56CAHE3/9AT 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 1.5SMC56CAHE3/9AT?
For technical support, including 1.5SMC56CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56CAHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC56CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56CAHE3/9AT 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 1.5SMC56CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC56CAHE3/9AT?
All 1.5SMC56CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56CAHE3/9AT, 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 1.5SMC56CAHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC56CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56CAHE3/9AT 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 …
