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Vishay General Semiconductor - Diodes Division 1.5SMC33AHM3_A/H
- Part No.:
- 1.5SMC33AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33AHM3_A/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,150
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Product details
Overview
1.5SMC33AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 1500 W peak pulse power (10/1000 µs), and clamping voltage of 45.7 V at 32.8 A. It protects automotive-grade power rails and signal lines against ESD, lightning surges, and inductive switching transients.
For engineers reviewing the 1.5SMC33AHM3_A/H datasheet, 1.5SMC33AHM3_A/H pinout, 1.5SMC33AHM3_A/H application, or 1.5SMC33AHM3_A/H equivalent, this part delivers AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial PCB designs.
Technical Context
This TVS operates as a unidirectional clamping device with cathode-band polarity marking. Its silicon junction is glass passivated for stable leakage performance and robust surge endurance. The 10/1000 µs waveform rating reflects standardized IEC 61000-4-5 surge immunity testing conditions.
Thermal design relies on RθJA = 75 °C/W (on recommended 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W, enabling effective heat transfer to PCB traces. Junction temperature range spans −65 °C to +150 °C, supporting under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise clamping onset threshold for overvoltage protection |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 45.7 V at 32.8 A - clamped voltage during 1500 W transient, limiting stress on downstream ICs |
| PPPM | 1500 W (10/1000 µs) - peak surge handling capacity per industry-standard waveform |
| IFSM | 200 A (8.3 ms half-sine) - forward surge current rating for unidirectional operation only |
| TJ max | +150 °C - enables use in high-temperature automotive engine control units and power modules |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference | Connected to protected line's lower-potential side (e.g., GND or return path) |
| Cathode | Clamping output / surge sink | Connected to protected line's higher-potential side (e.g., 33 V rail); band-marked terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, TCT, and AC-H3TRB |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-609 Category 1a; supports environmentally regulated supply chains |
| MSL Level 1 (260 °C peak) | Reflow-compatible without dry-pack or baking; suitable for standard SMT assembly lines |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly laid out |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot during transients, reducing risk of MOSFET gate oxide damage |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 33 V battery-supplied ECUs from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 33 V rail and chassis ground to clamp surges above 45.7 V. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure or temperature sensors) from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across differential pair or single-ended signal-to-ground to limit transient voltage swing. Use Value: Maintains signal integrity below ±15 kV contact ESD (IEC 61000-4-2) without degrading bandwidth or adding capacitance >100 pF. |
| Telecom DC Power Input Stage | Consumer Appliance Motor Drive Snubber |
Use Scenario: Safeguarding 33 V telecom power supplies against lightning-induced surges entering via PoE or external ports. IC Role / Device Role / Timing Role: Primary-level TVS on input rectifier output, upstream of bulk capacitor and DC-DC converter. Use Value: Absorbs up to 1500 W surge energy while holding clamped voltage below 46 V, preserving downstream regulator FETs. |
Use Scenario: Suppressing flyback spikes from brushed DC motors in home appliances (e.g., washing machine drive circuits). IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge low-side switch to clamp inductive kickback. Use Value: Limits voltage reversal to ≤45.7 V, preventing MOSFET avalanche failure and extending brush life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Same VBR range (31.4–34.7 V), but SMA package (DO-214AC), lower PPPM = 400 W | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is Class 2 or lower. |
| 1.5KE33A | Through-hole DO-201 package, identical electrical specs, no AEC-Q101 qualification | Not approved for automotive production; requires rework for automated SMT lines | Choose only for prototyping or non-automotive industrial use where leaded assembly is acceptable. |
Compared with SMAJ33A-E3/57T and 1.5KE33A, the 1.5SMC33AHM3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge capability, and SMC surface-mount compatibility - making it the only drop-in solution for volume automotive PCBs requiring zero layout change and full compliance traceability.
Availability
1.5SMC33AHM3_A/H is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface, and telecom DC input protection requiring stable component supply, long-term lifecycle support, and halogen-free material compliance.
Supply support for 1.5SMC33AHM3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for high-power transient suppression in harsh environments, emphasizing AEC-Q101 qualification, low clamping voltage, and robust thermal performance in compact SMC packages.
FAQ
What is the clamping voltage of the 1.5SMC33AHM3_A/H under maximum surge conditions?
The 1.5SMC33AHM3_A/H clamps to 45.7 V at its peak pulse current of 32.8 A (10/1000 µs waveform). This value is measured per standard test conditions and represents the maximum voltage seen by protected circuitry during a full 1500 W transient event. Designers must ensure downstream components tolerate this clamped voltage with margin.
Is the 1.5SMC33AHM3_A/H suitable for automotive applications?
Yes - the 1.5SMC33AHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials. Its thermal rating (TJ = −65 °C to +150 °C), MSL Level 1 reflow profile, and validation across temperature cycling and HTRB tests confirm suitability for under-hood and body-control module applications.
How does the 1.5SMC33AHM3_A/H differ from the non-AEC-Q101 version 1.5SMC33A-M3/57T?
The 1.5SMC33AHM3_A/H adds AEC-Q101 qualification, extended temperature validation, and enhanced process controls versus the commercial-grade 1.5SMC33A-M3/57T. Both share identical electrical specs and SMC packaging, but only the HM3 suffix guarantees automotive reliability data and lot-level traceability required for Tier 1 production.
What is the reverse leakage current of the 1.5SMC33AHM3_A/H at its stand-off voltage?
At VWM = 28.2 V, the 1.5SMC33AHM3_A/H exhibits a maximum reverse leakage current (ID) of 1 µA at 25 °C. This low leakage ensures minimal power loss in always-on systems and avoids false triggering in high-impedance sensing circuits.
Can the 1.5SMC33AHM3_A/H be used in bidirectional configurations?
No - the 1.5SMC33AHM3_A/H is unidirectional only, indicated by the "A" suffix and cathode band marking. For bidirectional protection at the same voltage level, use the 1.5SMC33CA variant (e.g., 1.5SMC33CHM3_A/H), which provides symmetrical clamping in both polarities.
1.5SMC33AHM3_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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 32.8A
- 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)
1.5SMC33AHM3_A/H FAQ
1.How can I place an order for 1.5SMC33AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33AHM3_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 1.5SMC33AHM3_A/H reliable?
The price and inventory of 1.5SMC33AHM3_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 1.5SMC33AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC33AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33AHM3_A/H?
1.5SMC33AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33AHM3_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 1.5SMC33AHM3_A/H?
For technical support, including 1.5SMC33AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC33AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33AHM3_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 1.5SMC33AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC33AHM3_A/H?
All 1.5SMC33AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33AHM3_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 1.5SMC33AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC33AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC33AHM3_A/H Tags
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Diodes Incorporated
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