My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC51CAHE3/57T
- Part No.:
- 1.5SMC51CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC51CAHE3/57T.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,049
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC51CAHE3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power (10/1000 μs), 51 V breakdown voltage (VBR min/max = 48.5–53.6 V at 1 mA), and 70.1 V maximum clamping voltage (VC) at 21.4 A peak pulse current. It protects sensitive ICs and MOSFETs in automotive and industrial power rails.
For engineers reviewing the 1.5SMC51CAHE3/57T datasheet, 1.5SMC51CAHE3/57T pinout, 1.5SMC51CAHE3/57T application, or 1.5SMC51CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped transient protector-triggering when reverse (or forward, in bidirectional mode) voltage exceeds its breakdown threshold, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 μA at 43.6 V stand-off).
Designed for repetitive transients up to 0.01% duty cycle, it delivers fast response time (<1 ns), low thermal resistance (RθJL = 15 °C/W), and meets MSL Level 1 reflow requirements (260 °C peak). The bidirectional configuration eliminates polarity sensitivity in AC-coupled or floating signal lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines precise clamping onset window for reliable overvoltage detection |
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage rises above 1 μA |
| VC @ IPPM | 70.1 V at 21.4 A - clamping voltage under 10/1000 μs surge, limiting protected circuit stress |
| PPPM | 1500 W - peak surge power handling capacity, enabling robust protection against lightning & inductive spikes |
| TJ max | +150 °C - supports operation in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal design |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional conduction | Connected to protected line or ground reference depending on layout; symmetric with cathode for AC protection |
| Cathode | Current exit point in forward bias; common terminal in bidirectional conduction | Electrically identical to anode in bidirectional mode; no band marking required per spec |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or floating power domains without polarity concerns |
| 1500 W peak pulse power | Sustains high-energy transients (e.g., ISO 7637-2 Pulse 5a) without degradation across 1000+ cycles |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C without popcorn effect or delamination risk |
| Glass passivated junction | Ensures long-term VBR stability and <1 μA leakage at rated VWM, critical for low-power standby circuits |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Bidirectional TVS placed between power rail and chassis ground to clamp surges before they reach LDOs or microcontrollers. Use Value: Limits rail voltage to ≤70.1 V during 1500 W pulses, preventing latch-up or gate oxide damage in downstream silicon. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Placed across differential signal pair (e.g., RS-485 bus) to suppress ±15 kV contact ESD per IEC 61000-4-2. Use Value: Sub-1 ns response and symmetric clamping ensure signal integrity remains intact during fast transients. |
| Telecom Line Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding PoE-powered Ethernet ports against lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Mounted across primary-side DC input (e.g., 48 V PSE output) before DC-DC converter stage. Use Value: Withstands 10/1000 μs surges up to 21.4 A while maintaining <1 μA leakage at 43.6 V, minimizing standby loss. |
Use Scenario: Front-end protection in universal-input AC-DC adapters subject to EN 61000-4-5 line surges. IC Role / Device Role / Timing Role: Connected between bridge rectifier output and bulk capacitor to absorb switching and lightning transients. Use Value: 1500 W rating and 70.1 V clamping prevent overvoltage failure of electrolytic capacitors and primary-side FETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Lower peak power (600 W), same VBR range and SMC-compatible SMB (DO-214AA) package | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when cost and board space are constrained but 1500 W surge margin is not required |
| 1.5KE51CA | Through-hole DO-201 package, identical electrical specs but incompatible with SMT assembly | Requires wave soldering or hand-soldering; unsuitable for high-volume automated production | Choose only for legacy through-hole designs or prototyping where rework flexibility outweighs production efficiency |
Compared with SMBJ51CA and 1.5KE51CA, the 1.5SMC51CAHE3/57T uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC surface-mount compatibility-making it the only option meeting automotive production, high-reliability industrial, and automated manufacturing requirements simultaneously.
Availability
1.5SMC51CAHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom infrastructure equipment, and consumer power adapters requiring stable component supply and full AEC-Q101 compliance.
Supply support for 1.5SMC51CAHE3/57T 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, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where robustness, repeatability, and automated assembly are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC51CAHE3/57T under a 10/1000 μs surge?
The 1.5SMC51CAHE3/57T clamps to a maximum of 70.1 V when subjected to its rated 21.4 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the 1.5SMC51CAHE3/57T suitable for automotive applications?
Yes-the 1.5SMC51CAHE3/57T carries AEC-Q101 qualification (denoted by the "HE3" suffix) and is explicitly rated for automotive use in engine control, body electronics, and ADAS subsystems. Its 150 °C junction rating, MSL Level 1 reflow compatibility, and validated reliability testing meet stringent automotive requirements.
How does the bidirectional configuration of the 1.5SMC51CAHE3/57T affect PCB layout?
The 1.5SMC51CAHE3/57T has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This simplifies layout for AC-coupled lines, differential buses (e.g., CAN, RS-485), or floating grounds-no silkscreen polarity indicators or footprint asymmetry are needed.
What is the maximum steady-state power dissipation of the 1.5SMC51CAHE3/57T?
The 1.5SMC51CAHE3/57T has a maximum steady-state power dissipation (PD) of 6.5 W when mounted on an infinite heatsink at 50 °C ambient. In typical PCB layouts with 8.0 mm × 8.0 mm copper pads per terminal, derating applies above 25 °C ambient per Figure 2 in the datasheet.
Does the 1.5SMC51CAHE3/57T require external series impedance for optimal performance?
No external series impedance is required for basic clamping function, but a current-limiting resistor or fuse is recommended upstream to prevent sustained overcurrent if the device enters avalanche conduction due to prolonged overvoltage. The 1.5SMC51CAHE3/57T is designed to handle short-duration transients-not continuous fault conditions.
1.5SMC51CAHE3/57T 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 21.4A
- 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)
1.5SMC51CAHE3/57T FAQ
1.How can I place an order for 1.5SMC51CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC51CAHE3/57T 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 1.5SMC51CAHE3/57T reliable?
The price and inventory of 1.5SMC51CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC51CAHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC51CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC51CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC51CAHE3/57T?
1.5SMC51CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC51CAHE3/57T 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 1.5SMC51CAHE3/57T?
For technical support, including 1.5SMC51CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC51CAHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC51CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC51CAHE3/57T 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 1.5SMC51CAHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC51CAHE3/57T?
All 1.5SMC51CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC51CAHE3/57T, 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 1.5SMC51CAHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC51CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC51CAHE3/57T 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 …
