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Vishay General Semiconductor - Diodes Division 1.5SMC43CAHM3_A/H
- Part No.:
- 1.5SMC43CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CAHM3_A/H.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,645
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Product details
Overview
1.5SMC43CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 36.8 V standoff voltage (VWM), 40.9–45.2 V breakdown voltage (VBR) at 1 mA, 59.3 V clamping voltage (VC) at 25.3 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 µs waveform - deployed in automotive sensor signal lines, industrial I/O ports, and telecom interface protection.
For engineers reviewing the 1.5SMC43CAHM3_A/H datasheet, 1.5SMC43CAHM3_A/H pinout, 1.5SMC43CAHM3_A/H application, or 1.5SMC43CAHM3_A/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), halogen-free RoHS compliance, and real-world clamping performance data essential for surge immunity validation and layout-critical ESD/transient design.
Technical Context
The 1.5SMC43CAHM3_A/H operates as a bidirectional avalanche diode, symmetrically clamping voltage transients above ±40.9 V in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the SMC package supports automated placement and meets MSL Level 1 (260 °C reflow peak).
It delivers 1500 W peak pulse power handling per 10/1000 µs waveform at TA = 25 °C, derating linearly above 25 °C per Fig. 2, with thermal resistance RθJL = 15 °C/W to leads and RθJA = 75 °C/W to ambient on standard 8.0 mm × 8.0 mm copper pads. Junction temperature range is –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 36.8 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 40.9–45.2 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during fast transients. |
| VC (Clamping) | 59.3 V at 25.3 A - Peak voltage seen by protected circuit under 10/1000 µs surge; critical for IC-level voltage tolerance alignment. |
| PPPM | 1500 W - Surge energy absorption capacity with standardized waveform; validates suitability for IEC 61000-4-5 Level 4 compliance designs. |
| IPPM | 25.3 A - Peak transient current handled at VC; determines minimum trace width and PCB copper pad sizing (8.0 mm × 8.0 mm recommended). |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and high-ambient industrial enclosures. |
| RθJA | 75 °C/W - Thermal resistance to ambient on standard footprint; informs derating curves and thermal management requirements. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated terminals, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; connects to line being protected (e.g., RS-485 A/B pair). |
| Cathode | Transient current entry (positive polarity) | Second terminal of symmetrical junction; ties to same reference plane as Anode - forms bidirectional clamp path. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485) without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock - required for engine control and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets IPC-1752A material declaration standards and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance. |
| 1500 W peak pulse rating | Withstands repetitive 10/1000 µs surges up to 0.01% duty cycle - sufficient for lightning-induced transients per IEC 61000-4-5. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), preserving timing integrity in high-speed data lines. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting analog/digital signal lines from load dump and ISO 7637-2 pulses in engine control units and radar modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller input to clamp ±100 V transients within 1 ns. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V MCU GPIOs while maintaining signal fidelity due to low capacitance (<100 pF at 0 V). |
Use Scenario: Shielding 24 V digital inputs on programmable logic controllers from relay coil flyback and ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS across input terminals to shunt >1 kV transients before reaching optocoupler or Schmitt trigger input stage. Use Value: Eliminates need for external series resistors or RC filters, reducing BOM count and board space while meeting IEC 61000-4-4 Level 4 immunity. |
| Telecom Data Line Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links exposed to induced lightning surges. IC Role / Device Role / Timing Role: Differential-mode TVS across A/B bus lines to limit common-mode and differential-mode overvoltages simultaneously. Use Value: Maintains signal integrity up to 10 Mbps by limiting clamping overshoot to <59.3 V, well below transceiver absolute maximum ratings. |
Use Scenario: Adding secondary-level surge protection to USB 2.0 upstream ports in smart home hubs against human-body-model ESD. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed after primary ESD diode to absorb residual energy from 8 kV contact discharge. Use Value: Extends system-level ESD robustness beyond IEC 61000-4-2 Level 4 without degrading 480 Mbps data eye due to sub-100 pF junction capacitance. |
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/VBR/VC, but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 110 °C/W). | Preferred for space-constrained consumer electronics where 600 W surge margin suffices; not AEC-Q101 qualified. | Select when board area is limited and automotive qualification is unnecessary; verify thermal margin with reduced copper pad area. |
| 1.5KE43CA | Same electrical specs, but axial-leaded DO-15 package; higher mounting inductance limits high-frequency transient response. | Suitable for prototyping or through-hole legacy designs; incompatible with automated SMT assembly. | Choose only for hand-soldered evaluation or repair; avoid in production SMT lines due to placement incompatibility and inferior surge repetition capability. |
Compared with SMBJ43CA and 1.5KE43CA, the 1.5SMC43CAHM3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge rating, halogen-free compliance, and SMC package compatibility with high-volume pick-and-place - making it the optimal choice for automotive and industrial SMT production requiring long-term supply stability and regulatory alignment.
Availability
1.5SMC43CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom data line protection, and consumer USB port hardening requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for 1.5SMC43CAHM3_A/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where AEC-Q101 qualification, 1500 W surge capability, and SMT manufacturability are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC43CAHM3_A/H under a 10/1000 µs surge?
The 1.5SMC43CAHM3_A/H has a maximum clamping voltage (VC) of 59.3 V at 25.3 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC43CAHM3_A/H maintains this clamping performance across its rated junction temperature range.
Is the 1.5SMC43CAHM3_A/H qualified for automotive applications?
Yes, the 1.5SMC43CAHM3_A/H is AEC-Q101 qualified, as indicated by the "HM3" suffix and documented in Vishay's 1.5SMC Series specification (Document Number: 88303). This qualification covers stress tests including temperature cycling, high-temperature operating life, and mechanical shock - confirming suitability for under-hood and chassis-mounted automotive electronics. The 1.5SMC43CAHM3_A/H is explicitly listed in the AEC-Q101 qualified variants table with revision code "A/H".
What does the "CA" suffix mean in 1.5SMC43CAHM3_A/H?
The "CA" suffix in 1.5SMC43CAHM3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities, with identical VBR, VWM, and VC characteristics for positive and negative surges. Unlike unidirectional "A" variants, the 1.5SMC43CAHM3_A/H has no cathode band marking and is used where AC signals, differential buses (e.g., CAN, RS-485), or polarity-agnostic protection is required.
What is the thermal resistance of the 1.5SMC43CAHM3_A/H?
The 1.5SMC43CAHM3_A/H 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 pads per terminal. Its junction-to-lead thermal resistance (RθJL) is 15 °C/W. These values are critical for calculating allowable power dissipation at elevated ambient temperatures and must be applied using the derating curve in Figure 2 of the Vishay 1.5SMC Series datasheet.
How does the 1.5SMC43CAHM3_A/H differ from the commercial-grade 1.5SMC43CA-E3/57T?
The 1.5SMC43CAHM3_A/H differs from 1.5SMC43CA-E3/57T in three key ways: (1) it carries the HM3 suffix indicating halogen-free and RoHS-compliant construction, (2) it is AEC-Q101 qualified (E3 is commercial grade only), and (3) it uses revision code "A/H" denoting a 7″ tape-and-reel packaging format. Electrically and thermally, both share identical VWM, VBR, VC, and PPPM specifications - but the 1.5SMC43CAHM3_A/H is designated for automotive and high-reliability industrial use.
1.5SMC43CAHM3_A/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:
- 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/H FAQ
1.How can I place an order for 1.5SMC43CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CAHM3_A/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_A/H reliable?
The price and inventory of 1.5SMC43CAHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CAHM3_A/H?
1.5SMC43CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CAHM3_A/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_A/H?
For technical support, including 1.5SMC43CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CAHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC43CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CAHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CAHM3_A/H?
All 1.5SMC43CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CAHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC43CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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