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Vishay General Semiconductor - Diodes Division 1.5SMC43CAHE3/57T
- Part No.:
- 1.5SMC43CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CAHE3/57T.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,523
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Product details
Overview
1.5SMC43CAHE3/57T 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 43 V standoff voltage (VWM), 48.5–53.6 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 μs), 59.3 V clamping voltage at 25.3 A, and operates across –65 °C to +150 °C. It is AEC-Q101 qualified and used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC43CAHE3/57T datasheet, 1.5SMC43CAHE3/57T pinout, 1.5SMC43CAHE3/57T application, or 1.5SMC43CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.17), MSL Level 1 moisture sensitivity, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard SMC footprints.
Technical Context
The 1.5SMC43CAHE3/57T implements a silicon avalanche junction structure optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity concerns in AC-coupled or floating signal paths.
Designed for repetitive surge handling under 0.01% duty cycle, it delivers stable clamping up to 1500 W with thermal derating above 25 °C (RθJA = 75 °C/W). The glass-passivated chip junction and DO-214AB package support high-reliability operation in automotive and industrial environments per AEC-Q101 stress testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 43 V - Maximum continuous reverse voltage before conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 48.5–53.6 V at 1 mA - Verified avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping) | 59.3 V at 25.3 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines safe IC survival margin. |
| PPPM | 1500 W - Surge energy absorption capacity under standardized waveform; enables protection against lightning-induced surges. |
| Operating Temp | –65 °C to +150 °C - Full junction temperature range; supports under-hood automotive and industrial ambient conditions. |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement; compatible with IPC-7351B footprint. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per JESD47. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements. Polarity: unmarked for bidirectional devices; symmetric terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche terminals | No functional polarity distinction; either terminal serves as cathode or anode depending on transient polarity - enables placement without orientation check. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC performance in both directions - eliminates need for polarity-aware layout in differential or AC signal lines. |
| 1500 W peak pulse power | Sustains 10/1000 μs surges up to 25.3 A - meets IEC 61000-4-5 Level 4 (4 kV) system-level surge immunity requirements. |
| Low clamping ratio (VC/VBR ≈ 1.17) | Minimizes overvoltage stress on downstream ICs - critical for protecting 48 V automotive microcontrollers and CAN transceivers. |
| AEC-Q101 qualification | Validated for automotive electronics - includes 1000-cycle temperature cycling, 1000-hr HTOL, and 1000-hr UHAST. |
| MSL Level 1 (260 °C peak) | Reflow-compatible without dry-pack or baking - simplifies manufacturing for high-volume automotive PCB assembly. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and temperature/pressure sensors exposed to load-dump and inductive switching transients in engine control modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning ICs. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V sensor interface ICs by limiting transient voltage to ≤59.3 V during 1 kV/500 A surge events. |
Use Scenario: Safeguarding 4–20 mA current-loop inputs in programmable logic controllers subjected to field wiring faults and EFT bursts. IC Role / Device Role / Timing Role: Primary overvoltage protector on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Maintains analog accuracy by avoiding leakage current drift (ID < 1 μA at 43 V), while clamping 10/1000 μs surges to safe levels for precision ADC front-ends. |
| Telecom Line Card Protection | Consumer Power Adapter EMI Filter |
Use Scenario: Secondary surge suppression on Ethernet PHY power rails and data lines in PoE-powered switches and base stations. IC Role / Device Role / Timing Role: Fast-response clamp parallel to DC-DC converter inputs and magnetics, complementing primary GDT or MOV stages. Use Value: Reduces residual clamping voltage to sub-60 V level - essential for safeguarding 12 V bias rails feeding gigabit Ethernet transceivers. |
Use Scenario: Input-stage transient suppression in universal-input AC/DC adapters for smart home devices, preventing failure due to mains-borne surges. IC Role / Device Role / Timing Role: Standoff-rated TVS across bulk capacitor terminals to absorb line-to-line and line-to-ground spikes. Use Value: Enables compact design with no external heat sinking required (PD = 6.5 W, RθJA = 75 °C/W), supporting high-density adapter PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA | Same VWM (43 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance | Select when board space is constrained and surge threat level is ≤1 kV. |
| 1.5KE43CA | Same VWM/VBR/VC specs, but through-hole DO-15 package; higher IPPM (38.4 A), same 1500 W rating | Requires wave soldering or hand assembly; incompatible with fully SMT production | Choose only for legacy designs or prototyping where rework flexibility outweighs automation needs. |
Compared with SMAJ43CA and 1.5KE43CA, the 1.5SMC43CAHE3/57T uniquely combines AEC-Q101 qualification, SMC's optimized thermal performance (RθJL = 15 °C/W), and full 1500 W surge capability in a reflow-ready, automotive-grade SMT package - making it the preferred choice for production automotive and industrial systems requiring validated reliability and manufacturability.
Availability
1.5SMC43CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, telecom line card surge suppression, and consumer power adapter EMI filtering requiring stable component supply and long-term lifecycle assurance.
Supply support for 1.5SMC43CAHE3/57T 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, MOSFETs, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified solutions.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments - delivering high-power surge handling, AEC-Q101 validation, and industry-standard SMC packaging for automotive, industrial, and telecom infrastructure applications.
FAQ
What is the clamping voltage of the 1.5SMC43CAHE3/57T at its rated peak pulse current?
The 1.5SMC43CAHE3/57T has a maximum clamping voltage (VC) of 59.3 V at 25.3 A peak pulse current (IPPM), measured under the standard 10/1000 μs double-exponential waveform. This value is guaranteed per the Vishay datasheet revision 09-Mar-2026 and defines the upper voltage limit imposed on protected circuits during surge events. The 1.5SMC43CAHE3/57T maintains this clamping performance bidirectionally and across its full operating temperature range.
Is the 1.5SMC43CAHE3/57T suitable for automotive applications?
Yes, the 1.5SMC43CAHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix, indicating RoHS-compliant construction with AEC-Q101 stress testing validation. It is deployed in engine control units, body electronics, and ADAS sensor modules where protection against load dump, ISO 7637-2 pulses, and ESD is required. The 1.5SMC43CAHE3/57T meets all applicable AEC-Q101 test conditions including temperature cycling, highly accelerated stress testing, and high-temperature operating life.
What does the "CA" suffix mean in 1.5SMC43CAHE3/57T?
The "CA" suffix in 1.5SMC43CAHE3/57T denotes a bidirectional Transient Voltage Suppressor - meaning the device provides symmetrical clamping in both forward and reverse directions, with identical electrical characteristics (VBR, VC, ID) regardless of polarity. This eliminates orientation constraints during PCB placement and makes the 1.5SMC43CAHE3/57T ideal for AC-coupled lines, differential buses like CAN or RS-485, and floating power domains where polarity reversal may occur.
What is the thermal resistance of the 1.5SMC43CAHE3/57T, and how does it affect layout?
The 1.5SMC43CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. This value assumes minimum recommended pad layout; reducing pad area increases RθJA and risks thermal runaway during repetitive surges. For optimal performance, the 1.5SMC43CAHE3/57T must be placed on full-size SMC-compatible copper pours with adequate thermal relief.
How does the 1.5SMC43CAHE3/57T compare to unidirectional variants like 1.5SMC43AHE3/57T?
The 1.5SMC43CAHE3/57T differs from unidirectional 1.5SMC43AHE3/57T solely in polarity configuration: the "CA" version is bidirectional with symmetric clamping, while the "A" version is unidirectional with a marked cathode band and forward conduction capability. Both share identical VWM (43 V), VBR (48.5–53.6 V), VC (59.3 V), and PPPM (1500 W) ratings. The 1.5SMC43CAHE3/57T is selected when circuit topology lacks defined polarity - such as in transformer-coupled interfaces or dual-supply systems.
1.5SMC43CAHE3/57T 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 25.3A
- 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)
1.5SMC43CAHE3/57T FAQ
1.How can I place an order for 1.5SMC43CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CAHE3/57T 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 1.5SMC43CAHE3/57T reliable?
The price and inventory of 1.5SMC43CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43CAHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CAHE3/57T?
1.5SMC43CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CAHE3/57T 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 1.5SMC43CAHE3/57T?
For technical support, including 1.5SMC43CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CAHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC43CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CAHE3/57T 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 1.5SMC43CAHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CAHE3/57T?
All 1.5SMC43CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CAHE3/57T, 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 1.5SMC43CAHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC43CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43CAHE3/57T Tags
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