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Vishay General Semiconductor - Diodes Division 1.5SMC43CAHM3/H
- Part No.:
- 1.5SMC43CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CAHM3/H.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,061
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Product details
Overview
1.5SMC43CAHM3/H 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 IT = 1.0 mA), 36.8 V stand-off voltage (VWM), clamps to ≤59.3 V at 25.3 A peak pulse current (IPPM), and delivers 1500 W peak pulse power with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC43CAHM3/H datasheet, 1.5SMC43CAHM3/H pinout, 1.5SMC43CAHM3/H application, or 1.5SMC43CAHM3/H equivalent, this part serves as a halogen-free, AEC-Q101-qualified TVS for bidirectional surge suppression where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical design requirements.
Technical Context
The 1.5SMC43CAHM3/H operates as a symmetrical avalanche diode, conducting equally in both directions above its reverse standoff voltage. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while its SMC (DO-214AB) package supports automated placement and meets UL 94 V-0 flammability rating.
It is rated for TJ = –65 °C to +150 °C operation, with thermal resistance RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable performance under repetitive surge conditions up to 0.01% duty cycle when mounted on 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at IT = 1.0 mA - defines precise avalanche onset threshold for bidirectional clamping |
| VWM | 36.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | ≤59.3 V at IPPM = 25.3 A - clamping voltage limits downstream IC stress during ESD/lightning transients |
| PPPM | 1500 W (10/1000 µs waveform) - peak surge energy handling capacity for transient immunity compliance |
| IPPM | 25.3 A - peak pulse current capability determines survivability against defined surge waveforms |
| TJ max. | +150 °C - enables use in under-hood automotive and high-ambient industrial environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
Package: SMC (DO-214AB), bidirectional device with no polarity marking; terminals are symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminal | Either terminal may serve as input or return path; no cathode band marking required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per JESD22-A108 |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-20E for green manufacturing and end-of-life compliance |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking or special handling |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 kV line-to-ground) surge immunity testing |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes protected circuit voltage overshoot during fast transients, preserving MOSFET/IC gate integrity |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Module |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before it reaches signal conditioning ICs. Use Value: Enables compliance with ISO 16750-2 (12 V system, 35 V/100 ms load dump) and AEC-Q100 stress tests without derating. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers against field-wiring induced surges and inductive kickback. IC Role / Device Role / Timing Role: Primary front-end TVS on each isolated input channel, coordinated with series impedance and optocoupler isolation. Use Value: Limits transient voltage to <60 V during 1 kV/500 A 10/1000 µs surges, preventing false triggering and latch-up in microcontroller GPIOs. |
| Telecom Line Protection | Consumer Power Adapter Input |
Use Scenario: Secondary-level protection on Ethernet PHY power rails (e.g., 3.3 V, 5 V) and RS-485 data lines exposed to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Fast-response clamp parallel to local bulk capacitance, absorbing residual energy after primary GDT or MOV stages. Use Value: Achieves <1 ns response time and sub-60 V clamping to prevent damage to PHY transceivers rated for ≤6.5 V absolute maximum ratings. |
Use Scenario: Input-stage surge suppression on AC-DC adapter primary-side rectifier outputs and secondary-side 12 V/5 V distribution nodes. IC Role / Device Role / Timing Role: Standoff-rated TVS across bulk capacitor terminals to suppress differential-mode switching spikes and EFT bursts. Use Value: Maintains VWM = 36.8 V margin above 12 V rail, ensuring zero leakage during normal operation while clamping >40 V transients within safe limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Same VBR range (40.9–45.2 V) but lower PPPM = 600 W and smaller SMB (DO-214AA) package (5.3 mm × 4.6 mm) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump or industrial 4 kV testing | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports) |
| 1.5KE43CA | Through-hole TO-204AE (DO-201AE) package; identical electrical specs but higher RθJA (~100 °C/W) and no AEC-Q101 qualification | Not suitable for automated SMT production or automotive qualification programs; requires wave soldering | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ43CA and 1.5KE43CA, the 1.5SMC43CAHM3/H uniquely combines AEC-Q101 qualification, 1500 W surge rating, halogen-free construction, and SMC package scalability - making it the preferred choice for production automotive and industrial SMT systems requiring full compliance and long-term supply stability.
Availability
1.5SMC43CAHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecommunications infrastructure requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for 1.5SMC43CAHM3/H 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, efficiency, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount TVS solutions for automotive, industrial, and telecom applications demanding AEC-Q101 qualification, low clamping voltage, and robust surge immunity in compact packages.
FAQ
What does the 'HM3' suffix indicate in 1.5SMC43CAHM3/H?
The 'HM3' suffix in 1.5SMC43CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The 'H' indicates 7-inch tape-and-reel packaging (850 units per reel), and '/H' confirms the specific reel configuration. This distinguishes it from commercial-grade 'M3' or automotive 'HE3' variants, ensuring compliance with automotive environmental and reliability standards.
Is 1.5SMC43CAHM3/H suitable for protecting CAN FD interfaces?
Yes, 1.5SMC43CAHM3/H is suitable for CAN FD interface protection. With VWM = 36.8 V and VC ≤ 59.3 V at 25.3 A, it provides ample margin above the CAN FD common-mode voltage range (±40 V) while clamping fast transients below the absolute maximum rating of most CAN FD transceivers (typically ±45 V). Its <1 ns response time ensures effective suppression of ESD and burst events.
How does the clamping voltage of 1.5SMC43CAHM3/H compare to its breakdown voltage?
The clamping voltage (VC = ≤59.3 V) of 1.5SMC43CAHM3/H is approximately 1.39× its minimum breakdown voltage (VBR(min) = 40.9 V), resulting in a low clamping ratio. This tight ratio ensures minimal overvoltage stress on downstream components during surge events, which is critical for safeguarding sensitive 3.3 V or 5 V logic interfaces without requiring additional series impedance.
Can 1.5SMC43CAHM3/H be used in place of unidirectional TVS diodes like 1.5SMC43AHM3/H?
No - 1.5SMC43CAHM3/H is strictly bidirectional and lacks polarity marking, whereas 1.5SMC43AHM3/H is unidirectional with a cathode band. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC-coupled or floating signal lines (e.g., RS-485, Ethernet), while unidirectional types are required for DC-biased rails where forward conduction must be blocked.
What is the maximum PCB pad size recommended for thermal performance of 1.5SMC43CAHM3/H?
The datasheet specifies optimal thermal performance for 1.5SMC43CAHM3/H when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. Using smaller pads increases RθJA beyond the rated 75 °C/W, potentially causing junction temperature exceedance during repetitive surges. For high-duty-cycle applications, thermal vias under pads are recommended to enhance heat dissipation.
1.5SMC43CAHM3/H 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/H FAQ
1.How can I place an order for 1.5SMC43CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CAHM3/H 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/H reliable?
The price and inventory of 1.5SMC43CAHM3/H 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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CAHM3/H?
1.5SMC43CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CAHM3/H 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/H?
For technical support, including 1.5SMC43CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC43CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CAHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CAHM3/H?
All 1.5SMC43CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CAHM3/H, 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/H part is unused and in its original packaging.
Return procedure for 1.5SMC43CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43CAHM3/H Tags
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