My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC33AHM3/I
- Part No.:
- 1.5SMC33AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33AHM3/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,599
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC33AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 28.2 V stand-off voltage (VWM), clamps transients to ≤45.7 V at 32.8 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC33AHM3/I datasheet, 1.5SMC33AHM3/I pinout, 1.5SMC33AHM3/I application, or 1.5SMC33AHM3/I equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, SMC (DO-214AB) package details, thermal resistance data, and real-world design context for ESD/surge protection selection.
Technical Context
This unidirectional TVS operates as a clamping device that remains high-impedance below VWM = 28.2 V and rapidly avalanches above VBR = 31.4–34.7 V to limit transient voltages. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM), while the low incremental surge resistance enables effective energy diversion during 10/1000 µs surges.
The device is rated for TJ = –65 °C to +150 °C, has RθJA = 75 °C/W (on recommended 8.0 mm × 8.0 mm copper pads), and meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility (260 °C peak). The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise avalanche initiation threshold for repeatable clamping behavior |
| VWM | 28.2 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | ≤45.7 V at 32.8 A - clamped voltage during 1500 W transient, critical for downstream IC survivability |
| PPPM | 1500 W (10/1000 µs) - peak surge handling capacity for lightning and inductive switching events |
| IFSM | 200 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction during fault conditions |
| TJ max. | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8 mm × 8 mm copper pads |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line ground or low-side reference | Completes clamping path when transient exceeds VBR; must be routed to lowest-impedance return path |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., 24 V rail or signal line) | Acts as high-impedance node until breakdown; placement determines clamping reference and layout inductance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock testing |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without external series impedance |
| Glass passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and long-term parameter stability |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture-related popcorning or delamination |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive OEM environmental requirements and supports green manufacturing compliance |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and chassis ground to shunt transients before they reach sensitive analog inputs or communication ICs. Use Value: Limits induced spikes to ≤45.7 V, preserving signal integrity and preventing latch-up or damage to 3.3 V/5 V microcontrollers and ADCs. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against field-wiring faults and inductive kickback from solenoids or relays. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 28.2 V) installed across input terminals to clamp >33 V surges while remaining transparent during normal 24 V operation. Use Value: Enables reliable operation under repeated 1500 W surges without degradation, supporting 10-year industrial service life requirements. |
| Telecom Power Rail Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Guarding 48 V DC power feeds in PoE-powered network equipment and base station radios against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage, coordinated with upstream fuses and secondary-stage polymer PTCs for staged protection. Use Value: Clamps 10/1000 µs surges to <46 V, ensuring downstream DC/DC converters and PMICs remain within absolute maximum ratings. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools where EMI and voltage overshoot threaten MCU GPIOs. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) unidirectional TVS mounted directly at motor terminals to absorb inductive energy before propagation into control board traces. Use Value: Prevents false resets and flash corruption in embedded microcontrollers by limiting transient coupling to <50 V at source. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52T (Vishay) | Lower peak power (600 W), SMB package (smaller footprint, higher RθJA = 90 °C/W) | Best suited for space-constrained consumer electronics with lower surge exposure (IEC 61000-4-2 only) | Select when board area is limited and surge threat level is moderate; verify thermal margin with reduced copper pad area |
| 1.5KE33A (ON Semiconductor) | Through-hole DO-201 package, identical VBR/VC specs but no AEC-Q101 qualification or halogen-free certification | Applicable in legacy industrial designs where automated SMT is not available or cost-sensitive non-automotive production dominates | Choose only for prototyping or non-automotive replacement; lacks HM3's automotive reliability and environmental compliance |
Compared with 1.5SMC33AHM3/I, SMBJ33A-E3/52T trades surge robustness for compactness, while 1.5KE33A sacrifices AEC-Q101 validation and halogen-free status for through-hole compatibility - making 1.5SMC33AHM3/I the sole choice for volume automotive or high-reliability SMT production requiring full compliance.
Availability
1.5SMC33AHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC inputs, telecom power supplies, and appliance motor drives requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for 1.5SMC33AHM3/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 high-power, surface-mount transient suppression in harsh environments - delivering 1500 W surge capability in the compact SMC package with automotive-grade process controls and qualification.
FAQ
What is the breakdown voltage range of the 1.5SMC33AHM3/I?
The 1.5SMC33AHM3/I has a guaranteed breakdown voltage (VBR) range of 31.4 V to 34.7 V at a test current of 1 mA, measured per ANSI/IEEE C62.35 standards. This tight tolerance ensures consistent clamping behavior across production lots and supports reliable overvoltage protection design margins in automotive and industrial systems.
Is the 1.5SMC33AHM3/I qualified for automotive applications?
Yes, the 1.5SMC33AHM3/I carries the HM3 suffix, confirming it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock - meeting requirements for under-hood and body-control module deployments.
What does the "I" suffix mean in 1.5SMC33AHM3/I?
The "I" suffix in 1.5SMC33AHM3/I indicates packaging in a 13-inch diameter plastic tape and reel containing 3500 units. This format supports high-volume automated SMT assembly and is compatible with standard pick-and-place equipment used in Tier 1 automotive and industrial electronics manufacturing.
How does the 1.5SMC33AHM3/I compare to bidirectional TVS diodes?
The 1.5SMC33AHM3/I is unidirectional and intended for DC line protection where polarity is fixed - such as 24 V power rails or sensor outputs referenced to ground. Unlike bidirectional variants (e.g., 1.5SMC33CHM3/I), it conducts only in reverse avalanche and forward conduction, offering lower capacitance and tighter VBR control for DC-coupled paths.
What is the maximum clamping voltage of the 1.5SMC33AHM3/I under surge conditions?
The 1.5SMC33AHM3/I clamps to a maximum of 45.7 V when subjected to its rated peak pulse current of 32.8 A (10/1000 µs waveform). This value is critical for ensuring downstream components - such as 3.3 V or 5 V microcontrollers - remain within their absolute maximum voltage ratings during transient events.
1.5SMC33AHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for 1.5SMC33AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33AHM3/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 1.5SMC33AHM3/I reliable?
The price and inventory of 1.5SMC33AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC33AHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC33AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33AHM3/I?
1.5SMC33AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33AHM3/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 1.5SMC33AHM3/I?
For technical support, including 1.5SMC33AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33AHM3/I requirements.
6.How does Aetrix verify that 1.5SMC33AHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33AHM3/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 1.5SMC33AHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC33AHM3/I?
All 1.5SMC33AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33AHM3/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 1.5SMC33AHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC33AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC33AHM3/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
