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Vishay General Semiconductor - Diodes Division 1.5SMC43CAHM3/I
- Part No.:
- 1.5SMC43CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CAHM3/I.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,989
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Product details
Overview
1.5SMC43CAHM3/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 breakdown voltage (VBR = 40.9–45.2 V at 1 mA), 36.8 V stand-off voltage (VWM), clamps to ≤59.3 V at 25.3 A peak pulse current (10/1000 µs), and delivers 1500 W peak pulse power. It is halogen-free, RoHS-compliant, AEC-Q101 qualified, and used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC43CAHM3/I datasheet, 1.5SMC43CAHM3/I pinout, 1.5SMC43CAHM3/I application, or 1.5SMC43CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, MSL Level 1 moisture sensitivity, DO-214AB (SMC) package compatibility, and compliance with UL 497B for telecom and automotive surge protection.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 36.8 V), then rapidly avalanches into low-impedance conduction when transient voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the SMC package supports automated placement and meets J-STD-020 reflow profiles up to 260 °C peak.
Rated for -65 °C to +150 °C operating junction temperature, it sustains repetitive 10/1000 µs surges at 0.01% duty cycle and derates linearly above 25 °C ambient per Fig. 2. The bidirectional configuration eliminates polarity concerns in AC-coupled or differential signal paths, and its low incremental surge resistance enhances energy absorption efficiency during ESD or lightning-induced transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1 mA - defines precise avalanche initiation threshold in both directions |
| VWM | 36.8 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | ≤59.3 V at 25.3 A - clamping voltage limiting downstream circuit stress during 10/1000 µs surge |
| PPPM | 1500 W - peak pulse power handling capacity under standardized surge waveform |
| IPPM | 25.3 A - maximum non-repetitive peak pulse current supported without degradation |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, compatible with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional configuration | No polarity marking - symmetrical terminals enable AC or differential line protection without orientation constraints |
| Cathode | Current exit terminal in forward bias; common node in bidirectional configuration | Identical electrical role to Anode - device functions identically in either direction; no band marking required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, RS-485 buses, or transformer-coupled interfaces without polarity management |
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control modules and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free reflow assembly with peak temperature up to 260 °C |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 2 Ω source impedance without failure |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage in MOSFET drivers |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting CAN/LIN transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and ground, clamping transients within nanoseconds to prevent damage to sensitive input stages. Use Value: AEC-Q101 qualification and 1500 W rating ensure survival of ISO 7637-2 Pulse 5a (75 V/300 ms) and IEC 61000-4-5 surges in harsh automotive environments. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs against ESD and inductive switching noise from motor drives. IC Role / Device Role / Timing Role: Bidirectional TVS connected across A/B lines of RS-485 transceivers to suppress common-mode and differential-mode transients. Use Value: Symmetrical clamping (VC ≤59.3 V in both directions) maintains signal integrity and prevents receiver saturation during ±25 kV contact ESD events. |
| Telecom Line Card Protection | Consumer Power Adapter Input |
|
Use Scenario: Front-end surge suppression on POTS or xDSL line cards exposed to lightning-induced surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Primary protection device mounted at connector entry point, diverting >1 kA surges to chassis ground before reaching SLIC or codec ICs. Use Value: UL 497B recognition and 1500 W rating meet telecom safety and immunity requirements for central office and CPE equipment. |
Use Scenario: Secondary-side overvoltage clamp on DC output rails of wall adapters supplying USB-C PD or IoT devices. IC Role / Device Role / Timing Role: Fast-acting shunt element that activates if primary regulation fails, preventing overvoltage damage to downstream USB controllers or batteries. Use Value: Low VWM (36.8 V) allows safe operation with 36 V nominal outputs while clamping tightly to protect 40 V-rated components. |
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 VBR range (40.9–45.2 V) but lower PPPM (600 W); SMB package (smaller footprint, higher thermal resistance) | Preferred where board space is constrained and surge threat level is lower (e.g., consumer USB ports) | Select SMBJ43CA only if system-level testing confirms 600 W suffices; verify thermal performance with smaller pad layout. |
| 1.5KE43CA | Through-hole TO-204AA (DO-41); identical electrical specs but incompatible mounting and higher inductance | Suitable for legacy designs or prototyping where manual assembly or breadboarding is required | Choose 1.5KE43CA only for through-hole validation or repair; not recommended for new SMT production due to assembly and reliability limitations. |
Compared with SMBJ43CA and 1.5KE43CA, the 1.5SMC43CAHM3/I offers superior surge robustness (1500 W vs. 600 W or through-hole-limited thermal path) and automotive-grade reliability, making it optimal for high-reliability SMT applications demanding AEC-Q101 compliance and DO-214AB manufacturability.
Availability
1.5SMC43CAHM3/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial communication interface protection, and telecom line card development requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for 1.5SMC43CAHM3/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, and protection devices with emphasis on reliability, precision, and application-specific qualification.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in automotive, industrial, and telecom systems-prioritizing AEC-Q101 compliance, low clamping ratios, and robust surge handling in compact SMC packages.
FAQ
What is the clamping voltage of the 1.5SMC43CAHM3/I under a 10/1000 µs surge?
The 1.5SMC43CAHM3/I clamps to a maximum 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 at the device terminals under specified test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads), and represents the upper limit of voltage imposed on protected circuitry during surge events.
Is the 1.5SMC43CAHM3/I suitable for automotive applications?
Yes, the 1.5SMC43CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for operation from -65 °C to +150 °C junction temperature and validated for reliability in engine bay and chassis-mounted modules per automotive stress test standards.
Does the 1.5SMC43CAHM3/I have polarity markings on the package?
No, the 1.5SMC43CAHM3/I is a bidirectional TVS diode and carries no cathode band or polarity marking. Its symmetrical construction means either terminal may serve as anode or cathode depending on instantaneous voltage polarity-eliminating orientation errors during automated placement on PCBs.
What is the maximum reverse leakage current for the 1.5SMC43CAHM3/I at its stand-off voltage?
At its rated stand-off voltage (VWM) of 36.8 V and TA = 25 °C, the 1.5SMC43CAHM3/I exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss and signal distortion in always-on circuits such as sensor bias networks or communication line terminations.
Which industry standards does the 1.5SMC43CAHM3/I comply with?
The 1.5SMC43CAHM3/I complies with UL 497B (underwriters' classification QVGQ2), meets MSL Level 1 per J-STD-020, passes JESD201 Class 2 whisker testing, and is certified RoHS-compliant and halogen-free. It is also rated for IEC 61000-4-2 ESD (±30 kV air), IEC 61000-4-4 EFT, and IEC 61000-4-5 surge immunity when applied per recommended layout guidelines.
1.5SMC43CAHM3/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:
- 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:
- 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/I FAQ
1.How can I place an order for 1.5SMC43CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CAHM3/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/I reliable?
The price and inventory of 1.5SMC43CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CAHM3/I?
1.5SMC43CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CAHM3/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/I?
For technical support, including 1.5SMC43CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC43CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CAHM3/I?
All 1.5SMC43CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CAHM3/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/I part is unused and in its original packaging.
Return procedure for 1.5SMC43CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43CAHM3/I Tags
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