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Vishay General Semiconductor - Diodes Division 1.5SMC43CAHM3_A/I
- Part No.:
- 1.5SMC43CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CAHM3_A/I.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,845
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Product details
Overview
1.5SMC43CAHM3_A/I 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), 47.8 V minimum breakdown voltage (VBR), 59.3 V maximum clamping voltage (VC) at 25.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC43CAHM3_A/I datasheet, 1.5SMC43CAHM3_A/I pinout, 1.5SMC43CAHM3_A/I application, or 1.5SMC43CAHM3_A/I equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification, SMC (DO-214AB) package thermal resistance, and compliance with UL 497B surge protector requirements.
Technical Context
This device operates as a voltage-clamped shunt protector: under transient overvoltage events exceeding VBR (~47.8–52.2 V), it avalanches to divert surge current away from downstream circuitry while maintaining VC ≤ 59.3 V. Its bidirectional symmetry enables use on AC-coupled or floating lines without polarity concerns.
Engineered for high-reliability environments, the 1.5SMC43CAHM3_A/I integrates glass-passivated junction technology, meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and is halogen-free and RoHS-compliant. The AEC-Q101 qualification confirms suitability for automotive-grade temperature cycling, humidity, and mechanical stress testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 43 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC RMS working limit. |
| VBR (Breakdown) | 47.8–52.2 V at 1 mA - Voltage range where avalanche conduction begins; ensures predictable turn-on during transients. |
| VC (Clamping) | 59.3 V at IPPM = 25.3 A - Peak voltage seen by protected circuit during 10/1000 µs surge; directly limits stress on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy lightning or inductive-switching surges. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; optimized for automated placement and thermal dissipation via copper pads. |
| Temperature Range | −65 °C to +150 °C - Full operational and storage range; validated for under-hood automotive and industrial ambient conditions. |
| AEC-Q101 | Qualified - Certified for automotive electronics per stress test standard including HTOL, TC, HAST, and UHST. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output; clamping occurs identically in both directions - eliminates orientation constraints during layout. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 (4 kV line-to-line) surges without external series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.24) | Minimizes voltage overshoot during fast transients - critical for safeguarding 3.3 V/5 V logic and analog front-ends. |
| Halogen-free, RoHS-compliant construction | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; supports green manufacturing and end-of-life compliance. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking - reduces assembly cost and risk. |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial surge protection systems requiring third-party safety certification. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in engine control units. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed at connector entry point, clamping surges before they reach signal conditioning ICs. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (75 V/350 ms) and IEC 61000-4-2 ±15 kV contact discharge. |
Use Scenario: Safeguarding 4–20 mA current loop and 0–10 V analog inputs in programmable logic controllers exposed to field wiring transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Limits input voltage to ≤59.3 V during 1 kV/500 A surge events, preventing op-amp saturation and ADC latch-up. |
| Telecom Line Card Surge Protection | Consumer Power Adapter EMI/Transient Filtering |
Use Scenario: Front-end protection of DSL, POTS, or Ethernet PHY interfaces against lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across line pairs, absorbing common-mode energy via chassis ground coupling. Use Value: Withstands repeated 10/700 µs surges up to 1.5 kV per ITU-T K.21; low capacitance (<100 pF) preserves signal bandwidth. |
Use Scenario: Secondary-side output rail protection in AC/DC adapters and USB PD chargers against output short-circuit recovery spikes and backfeed transients. IC Role / Device Role / Timing Role: Clamp device across regulated 5 V/9 V/12 V outputs, suppressing ringing and overshoot during dynamic load changes. Use Value: Fast response (<1 ns) prevents >59.3 V excursions that could damage connected USB peripherals or PMICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Same VWM (43 V) and bidirectional configuration, but SMB package (smaller footprint, lower PPPM = 600 W). | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump or industrial 4 kV tests. | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports). |
| 1.5KE43CA | Through-hole DO-201 package, identical electrical specs (VWM = 43 V, VC = 59.3 V), but higher thermal mass and manual assembly requirement. | Preferred for prototyping, high-reliability military/aerospace legacy designs, or where wave soldering is used. | Choose when automated SMT is unavailable or long-term serviceability with hand-soldered replacements is required. |
Compared with SMBJ43CA and 1.5KE43CA, the 1.5SMC43CAHM3_A/I delivers optimal balance of 1500 W surge capacity, AEC-Q101 qualification, and SMT manufacturability - making it the preferred choice for production automotive and industrial modules requiring zero rework and full compliance traceability.
Availability
1.5SMC43CAHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom line cards, and consumer power adapters requiring stable component supply, AEC-Q101 validation, and UL 497B recognition.
Supply support for 1.5SMC43CAHM3_A/I 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 reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, repeatable clamping, and qualification rigor are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC43CAHM3_A/I under a 10/1000 µs surge?
The 1.5SMC43CAHM3_A/I has a maximum clamping voltage (VC) of 59.3 V when subjected to its rated peak pulse current of 25.3 A using the standard 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88303 and ensures downstream components see limited overvoltage stress during surge events. The 1.5SMC43CAHM3_A/I maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC43CAHM3_A/I suitable for automotive applications?
Yes, the 1.5SMC43CAHM3_A/I is AEC-Q101 qualified - explicitly confirmed in Vishay's ordering information footnote (1) and thermal characteristics table. Its halogen-free, RoHS-compliant HM3 suffix and qualification cover temperature cycling, humidity, and mechanical shock testing required for under-hood and cabin electronics. The 1.5SMC43CAHM3_A/I is routinely deployed in automotive sensor modules and body control units.
Does the 1.5SMC43CAHM3_A/I have polarity markings?
No, the 1.5SMC43CAHM3_A/I is a bidirectional TVS diode and carries no polarity marking on the SMC (DO-214AB) package. Its symmetrical construction means either terminal functions identically as anode or cathode depending on transient polarity - eliminating orientation errors during automated placement and simplifying PCB layout.
What is the thermal resistance of the 1.5SMC43CAHM3_A/I?
The 1.5SMC43CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad per terminal, per Vishay document 88303. Its junction-to-lead resistance (RθJL) is 15 °C/W, supporting effective heat transfer to PCB copper in high-duty-cycle surge scenarios.
How does the 1.5SMC43CAHM3_A/I differ from unidirectional variants like 1.5SMC43AHM3_A/I?
The 1.5SMC43CAHM3_A/I is bidirectional (denoted by "CA"), providing symmetrical clamping for AC or floating signals, whereas 1.5SMC43AHM3_A/I is unidirectional ("A") with a cathode band and only protects against reverse-polarity transients. The 1.5SMC43CAHM3_A/I has identical VWM (43 V), VBR (47.8–52.2 V), and VC (59.3 V) ratings but applies them equally in both directions - essential for differential bus protection like CAN or RS-485.
1.5SMC43CAHM3_A/I 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:
- Active
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC43CAHM3_A/I FAQ
1.How can I place an order for 1.5SMC43CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CAHM3_A/I 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 1.5SMC43CAHM3_A/I reliable?
The price and inventory of 1.5SMC43CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CAHM3_A/I?
1.5SMC43CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CAHM3_A/I 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 1.5SMC43CAHM3_A/I?
For technical support, including 1.5SMC43CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CAHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC43CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CAHM3_A/I 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 1.5SMC43CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CAHM3_A/I?
All 1.5SMC43CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CAHM3_A/I, 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 1.5SMC43CAHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC43CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43CAHM3_A/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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