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Vishay General Semiconductor - Diodes Division 1.5SMC43AHM3_A/I
- Part No.:
- 1.5SMC43AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43AHM3_A/I.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,654
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Product details
Overview
1.5SMC43AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 43 V breakdown voltage (VBR = 40.9–45.2 V at 1 mA), 36.8 V stand-off voltage (VWM), and 59.3 V clamping voltage (VC) at 25.3 A peak pulse current - designed to protect automotive-grade power rails and signal lines against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC43AHM3_A/I datasheet, 1.5SMC43AHM3_A/I pinout, 1.5SMC43AHM3_A/I application, or 1.5SMC43AHM3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, 1500 W 10/1000 µs peak pulse power rating, low incremental surge resistance, and halogen-free RoHS-compliant construction with M3 suffix.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable avalanche response and fast turn-on (<1 ns typical). It delivers precise voltage limiting across -65 °C to +150 °C operating junction temperature range under transient stress.
Its thermal design relies on low RθJL = 15 °C/W (junction-to-leads) and RθJA = 75 °C/W (junction-to-ambient on 8.0 mm × 8.0 mm copper pads), enabling reliable operation at 6.5 W steady-state dissipation and 200 A 8.3 ms forward surge current handling.
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 for repeatable clamping behavior |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 59.3 V at 25.3 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak transient power absorption capability per JEDEC standard waveform |
| IFSM | 200 A - single half-sine surge current rating (8.3 ms), supporting high-energy inductive load protection |
| TJ max. | +150 °C - enables use in under-hood automotive environments without derating penalties |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" x 0.246" footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or reverse clamping | Connected to protected circuit ground or low-side return path; forms clamping loop with cathode |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., 12 V rail); band marking identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports under-hood and ADAS module deployment |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental compliance mandates without compromising surge robustness or thermal performance |
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy transients common in 12 V/24 V vehicle systems and industrial motor drives |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to downstream MOSFETs, microcontrollers, and CAN transceivers |
| MSL Level 1 (260 °C peak reflow) | Enables compatibility with standard lead-free SMT assembly processes without moisture sensitivity concerns |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power input and local regulator input. Use Value: Limits voltage to ≤59.3 V during 25.3 A surges, preventing damage to LDOs and MCU power domains. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs. IC Role / Device Role / Timing Role: Reverse-biased clamping element on differential signal pairs exposed to ESD and cable discharge events. Use Value: Sub-1 ns response ensures signal integrity preservation during 8 kV contact ESD per IEC 61000-4-2. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding PoE-powered equipment front-end converters from induced surges on long Ethernet runs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V DC input rail upstream of DC/DC converter. Use Value: 1500 W rating absorbs multi-pulse surges from nearby lightning strikes without degradation. |
Use Scenario: Suppressing flyback spikes generated by brushed DC motors in home appliances. IC Role / Device Role / Timing Role: Freewheeling path limiter across motor terminals during PWM commutation. Use Value: 200 A IFSM rating handles repetitive inductive kick energy without bond wire failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/57T | Same VBR range (40.9–45.2 V), but lower PPPM = 400 W and SMA package (smaller thermal mass) | Limited to lower-energy transients; unsuitable for automotive load dump per ISO 7637-2 Pulse 5a | Select only for space-constrained consumer applications with <500 W surge requirements |
| 1.5KE43A | Through-hole DO-201 package, identical electrical specs, but no AEC-Q101 qualification or halogen-free status | Not approved for automotive production; requires manual insertion and lacks MSL-1 reflow compatibility | Use only for prototyping or non-automotive industrial designs where automated SMT is not required |
Compared with SMAJ43A-E3/57T and 1.5KE43A, the 1.5SMC43AHM3_A/I uniquely combines AEC-Q101 qualification, 1500 W surge capacity, halogen-free construction, and SMC package - making it the sole choice for volume automotive SMT production requiring full compliance and reliability validation.
Availability
1.5SMC43AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom power inputs, and consumer appliance motor drives requiring stable component supply with full traceability and lifecycle continuity.
Supply support for 1.5SMC43AHM3_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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for robust transient suppression in harsh environments - emphasizing AEC-Q101 qualification, high peak pulse power, and SMT manufacturability for automotive and industrial power systems.
FAQ
What is the clamping voltage of the 1.5SMC43AHM3_A/I under a 10/1000 µs surge?
The 1.5SMC43AHM3_A/I clamps to a maximum of 59.3 V when subjected to its rated 25.3 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and reflects the actual voltage seen by downstream circuitry during surge events - critical for ensuring compatibility with 3.3 V, 5 V, or 12 V logic and power stages.
Is the 1.5SMC43AHM3_A/I qualified for automotive applications?
Yes, the 1.5SMC43AHM3_A/I carries AEC-Q101 qualification, confirmed by Vishay's documentation and ordering code suffix "HM3_A/I", where "HM3" denotes halogen-free RoHS-compliant construction and "A" indicates AEC-Q101 grade for the 1.5SMC6.8A–1.5SMC220A voltage range. This makes the 1.5SMC43AHM3_A/I suitable for production automotive modules including body control units and ADAS sensors.
What does the "HM3" suffix mean in 1.5SMC43AHM3_A/I?
The "HM3" suffix in 1.5SMC43AHM3_A/I specifies halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance and MSL Level 1 reflow capability (peak 260 °C). It distinguishes this variant from commercial-grade "M3" parts and confirms compliance with automotive environmental standards - a mandatory requirement for modern OEM supply chains.
How does the 1.5SMC43AHM3_A/I differ from bidirectional TVS diodes like 1.5SMC43CA?
The 1.5SMC43AHM3_A/I is unidirectional and features a cathode band for polarity-sensitive placement, while 1.5SMC43CA is bidirectional with symmetrical clamping in both directions and no polarity marking. The 1.5SMC43AHM3_A/I offers tighter VBR tolerance (±5%) and is optimized for DC rail protection, whereas 1.5SMC43CA suits AC-coupled or differential signal lines where polarity reversal may occur.
What is the thermal resistance of the 1.5SMC43AHM3_A/I in standard mounting conditions?
Per Vishay's datasheet, the 1.5SMC43AHM3_A/I 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, and a junction-to-leads resistance (RθJL) of 15 °C/W. These values enable stable operation up to 6.5 W steady-state dissipation and inform heatsinking decisions for high-duty-cycle surge environments.
1.5SMC43AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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)
1.5SMC43AHM3_A/I FAQ
1.How can I place an order for 1.5SMC43AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43AHM3_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 1.5SMC43AHM3_A/I reliable?
The price and inventory of 1.5SMC43AHM3_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 1.5SMC43AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC43AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43AHM3_A/I?
1.5SMC43AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43AHM3_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 1.5SMC43AHM3_A/I?
For technical support, including 1.5SMC43AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43AHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC43AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43AHM3_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 1.5SMC43AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC43AHM3_A/I?
All 1.5SMC43AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43AHM3_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 1.5SMC43AHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC43AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43AHM3_A/I Tags
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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