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Vishay General Semiconductor - Diodes Division 1.5SMC51AHM3_A/H
- Part No.:
- 1.5SMC51AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC51AHM3_A/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,747
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Product details
Overview
1.5SMC51AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 51 V breakdown voltage (VBR = 48.5–53.6 V at IT = 1.0 mA), 43.6 V stand-off voltage (VWM), and clamps transients to ≤70.1 V at 21.4 A peak pulse current (IPPM) under 10/1000 μs waveform - deployed in automotive power line and industrial sensor interface protection.
For engineers reviewing the 1.5SMC51AHM3_A/H datasheet, 1.5SMC51AHM3_A/H pinout, 1.5SMC51AHM3_A/H application, or 1.5SMC51AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, 1500 W peak pulse power rating, low incremental surge resistance, and halogen-free RoHS-compliant construction - critical for automotive-grade ESD/surge resilience in harsh environments.
Technical Context
The 1.5SMC51AHM3_A/H operates as a unidirectional clamping device with glass-passivated junction and cathode-band polarity marking. Its thermal design supports TJ up to +150 °C, with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation on standard 8.0 mm × 8.0 mm copper pads.
It delivers fast response time (<1 ps) and excellent clamping ratio (VC/VBR ≈ 1.39), validated per 10/1000 μs waveform testing. The device meets MSL Level 1 (260 °C reflow peak) and JESD201 Class 2 whisker resistance, confirming suitability for automated SMT assembly in high-reliability production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at IT = 1.0 mA - defines precise breakdown threshold for accurate overvoltage triggering |
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | ≤70.1 V at 21.4 A - clamping voltage limits downstream IC stress during 1500 W transient events |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 μs waveform, 0.01% duty cycle |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supporting inrush tolerance |
| TJ range | −65 °C to +150 °C - wide junction temperature range enables use in under-hood automotive and industrial enclosures |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 0.320" x 0.246" footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded in UL 94 V-0 flammable-rated compound; terminals are matte tin-plated, solderable per J-STD-002 and JESD22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground reference | Provides low-impedance path to ground during reverse-transient clamping; must be routed with minimal inductance |
| Cathode | Current exit terminal in forward bias; marked with band; connects to protected line (e.g., 12 V rail) | Defines unidirectional clamping direction - protects against positive-going transients only; reverse connection disables protection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics - ensures reliability under thermal cycling and vibration |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with environmental regulations and end-of-life disposal requirements for global OEM programs |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge events without degradation when mounted per recommended pad layout |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., inductive switch-off), improving protection margin for 5 V/3.3 V logic interfaces |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking - compatible with standard 260 °C lead-free reflow profiles and high-throughput SMT lines |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 12 V supply rails in automotive ECUs from load-dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits voltage to ≤70.1 V during 1500 W surges, preventing damage to downstream LDOs and microcontrollers rated for 40 V max input. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation systems exposed to motor switching noise. IC Role / Device Role / Timing Role: Point-of-entry TVS on 4–20 mA or 0–10 V signal lines before signal conditioning amplifier. Use Value: Clamps EFT bursts (IEC 61000-4-4) and lightning-induced surges to <70.1 V, preserving ADC accuracy and avoiding saturation of instrumentation amplifiers. |
| Telecom Power Input Stage | Consumer USB Power Delivery Port |
|
Use Scenario: Secondary-side surge suppression on −48 V telecom rectifier outputs feeding base station backplane supplies. IC Role / Device Role / Timing Role: Standoff-rated TVS across output bus to absorb repetitive line transients from upstream AC/DC converters. Use Value: Maintains 43.6 V working voltage while clamping to 70.1 V - compatible with −48 V nominal systems with ±10% tolerance and transient headroom. |
Use Scenario: Overvoltage protection on VBUS line of USB-C PD ports in portable monitors and docking stations. IC Role / Device Role / Timing Role: Primary clamping element between USB connector and PD controller's VBUS monitor pin. Use Value: Responds in <1 ps to fast-rising 100 V transients (e.g., hot-plug inductive kick), limiting voltage seen by PD controller to safe levels below absolute max rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppressor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A-E3/52 | Same VBR range (48.5–53.6 V), but SMB package (smaller footprint, lower PPPM = 600 W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 load dump or IEC 61000-4-5 Level 4 | Select when board space is constrained and surge energy is ≤600 W - verify thermal derating on small pads |
| 1.5KE51A | Through-hole DO-201 package; identical electrical specs but higher RθJA (≈100 °C/W) and no AEC-Q101 qualification | Not suitable for automotive SMT production; requires wave soldering and lacks automotive reliability validation | Choose only for legacy through-hole designs or non-automotive industrial prototypes where reflow compatibility is not required |
Compared with SMBJ51A-E3/52 and 1.5KE51A, the 1.5SMC51AHM3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC surface-mount compatibility - making it the only option among the three qualified for volume automotive production with full reflow process support.
Availability
1.5SMC51AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, and telecom infrastructure applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 1.5SMC51AHM3_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 performance.
The 1.5SMC Series is engineered for high-power transient suppression in demanding environments - targeting automotive, industrial, and telecom systems where robustness against ESD, EFT, and lightning-induced surges is mission-critical.
FAQ
What is the clamping voltage of the 1.5SMC51AHM3_A/H at its rated peak pulse current?
The 1.5SMC51AHM3_A/H has a maximum clamping voltage (VC) of 70.1 V at its rated peak pulse current (IPPM) of 21.4 A, measured under the standard 10/1000 μs double-exponential waveform. This value ensures downstream components see limited overvoltage stress during surge events, directly supporting design margin calculations for 48 V and 12 V automotive systems.
Is the 1.5SMC51AHM3_A/H qualified for automotive applications?
Yes, the 1.5SMC51AHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 1.5SMC series datasheet (Doc. #88303). This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock - validating its use in engine control modules, body electronics, and ADAS power domains.
What does the "HM3" suffix indicate in 1.5SMC51AHM3_A/H?
The "HM3" suffix in 1.5SMC51AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates 7" tape-and-reel packaging (850 units/reel), and "A/H" specifies revision code A for the H-pack format - distinguishing it from I-pack (3500 units) and non-automotive E3/M3 variants.
Can the 1.5SMC51AHM3_A/H be used in bidirectional protection circuits?
No, the 1.5SMC51AHM3_A/H is a unidirectional TVS diode, as indicated by its "A" suffix and cathode-band marking. For bidirectional protection, Vishay offers the 1.5SMC51CA variant (with "CA" suffix); using the 1.5SMC51AHM3_A/H in reverse-biased configurations will not provide symmetrical clamping and may fail catastrophically under negative transients.
What is the thermal resistance from junction to ambient for the 1.5SMC51AHM3_A/H?
The 1.5SMC51AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes still air conditions and is critical for calculating maximum allowable power dissipation at elevated ambient temperatures in enclosed automotive or industrial enclosures.
1.5SMC51AHM3_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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 21.4A
- 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)
1.5SMC51AHM3_A/H FAQ
1.How can I place an order for 1.5SMC51AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC51AHM3_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 1.5SMC51AHM3_A/H reliable?
The price and inventory of 1.5SMC51AHM3_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 1.5SMC51AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC51AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC51AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC51AHM3_A/H?
1.5SMC51AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC51AHM3_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 1.5SMC51AHM3_A/H?
For technical support, including 1.5SMC51AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC51AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC51AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC51AHM3_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 1.5SMC51AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC51AHM3_A/H?
All 1.5SMC51AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC51AHM3_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 1.5SMC51AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC51AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC51AHM3_A/H Tags
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