My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T33AHE3_A/H
- Part No.:
- SM15T33AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T33AHE3_A/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,049
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T33AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 33 V standoff voltage (VWM = 28.2 V), 45.7 V clamping voltage at 33 A IPPM, and AEC-Q101 qualified for automotive use. It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM15T33AHE3_A/H datasheet, SM15T33AHE3_A/H pinout, SM15T33AHE3_A/H application, or SM15T33AHE3_A/H equivalent, key selection criteria include clamping voltage under 46 V at 33 A, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, and SMC package thermal resistance (RθJL = 15 °C/W).
Technical Context
This TVS diode operates as a unidirectional overvoltage clamp, leveraging an avalanche breakdown junction to divert surge current away from protected circuitry. Its 1500 W peak pulse rating applies strictly to the 10/1000 μs waveform, with clamping performance validated at IT = 1.0 mA and IPPM = 33 A.
Designed for high-reliability automotive environments, SM15T33AHE3_A/H features glass passivated chip junction, meets MSL Level 1 (260 °C reflow), and exhibits low inductance due to its planar SMC construction. Failure mode under overstress is short-circuit, consistent with industrial TVS safety requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - Maximum reverse voltage before clamping begins; defines operating margin below breakdown. |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1.0 mA - Confirmed avalanche threshold range; ensures reliable turn-on during transients. |
| VC (Clamping Voltage) | 45.7 V at IPPM = 33 A (10/1000 μs) - Peak voltage seen by protected IC/MOSFET during worst-case surge. |
| PPPM | 1500 W - Surge energy handling capacity per IEC 61000-4-5; suitable for lightning-induced and inductive-switching threats. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance; supports power dissipation without external heatsink on standard PCB pads. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (unidirectional) | Connected to ground or low-impedance return path; carries full IPPM during clamping event. |
| Cathode | Protected line connection | Connected to line being protected (e.g., sensor supply or signal); voltage referenced to anode during surge. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
| Glass passivated junction | Ensures stable VBR over time and humidity exposure; eliminates risk of junction corrosion in harsh environments. |
| Low inductance SMC layout | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a), critical for protecting high-speed interfaces. |
| MSL Level 1 rating | Allows single-reflow assembly at 260 °C peak without moisture-induced damage; eliminates bake requirement pre-assembly. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor VOUT and chassis ground. Use Value: Limits transient voltage to ≤45.7 V during 33 A surges, preventing latch-up or gate oxide damage in downstream ADC or microcontroller input stages. | Use Scenario: Safeguarding encoder feedback lines in servo drives subjected to commutation noise from 48 V DC bus switching. IC Role / Device Role / Timing Role: Line-to-ground transient suppressor on differential A/B quadrature signals. Use Value: Clamps 10/1000 μs transients to 45.7 V while maintaining signal integrity via low capacitance (<100 pF at 0 V) and minimal propagation delay. |
| Telecom Power Input Stage | Consumer Appliance Control Board |
Use Scenario: Secondary-side overvoltage protection on 24 V PoE-powered base station modules. IC Role / Device Role / Timing Role: Standoff-clamp device across DC input rail prior to DC/DC converter. Use Value: Withstands 1500 W surges without degradation, enabling compliance with IEC 61000-4-5 Level 4 (4 kV line-earth) test requirements. | Use Scenario: Suppressing relay coil flyback spikes on washing machine main control board MCU GPIO lines. IC Role / Device Role / Timing Role: Unidirectional shunt protector on 3.3 V or 5 V logic-level control outputs. Use Value: Fast response (sub-nanosecond) and low clamping voltage prevent false triggering or reset events during 200 A IFSM-rated inductive turn-off. |
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 | 600 W PPPM (vs. 1500 W); same VWM (28.2 V), higher VC (53.3 V at 11.8 A) | Limited to lower-energy threats (IEC 61000-4-2 ESD only); not suitable for lightning or load-dump. | Select when cost sensitivity outweighs surge robustness and PCB space allows multiple devices in parallel. |
| 1.5KE33A | Through-hole DO-201 package; identical electrical specs but RθJA = 10°C/W vs. 75°C/W (SMC) | Requires wave soldering; incompatible with automated SMT lines; unsuitable for high-density automotive PCBs. | Choose only for legacy through-hole designs where rework to SMT is impractical. |
Compared with SMAJ33A-E3/57T and 1.5KE33A, SM15T33AHE3_A/H delivers 2.5× higher surge power in an AEC-Q101-qualified SMT package with superior thermal coupling (RθJL = 15 °C/W), making it the preferred choice for modern automotive and industrial systems requiring single-device, high-reliability transient protection.
Availability
SM15T33AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor units, industrial motor drive I/O protection, and telecom power input stages requiring stable component supply, AEC-Q101 compliance, and 1500 W surge immunity.
Supply support for SM15T33AHE3_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, TVS, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SM15T Series is designed specifically for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where failure modes must be predictable (short-circuit) and performance stable across temperature and lifetime.
FAQ
What is the clamping voltage of SM15T33AHE3_A/H at its rated peak pulse current?
The SM15T33AHE3_A/H has a maximum clamping voltage (VC) of 45.7 V when subjected to its peak pulse current (IPPM) of 33 A under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal, per Vishay Document 88380.
Is SM15T33AHE3_A/H qualified for automotive applications?
Yes, SM15T33AHE3_A/H is AEC-Q101 qualified, as confirmed by its HE3 suffix and explicit listing in Vishay's automotive ordering codes. It undergoes stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD per JESD22-A114, making it suitable for under-hood and body-control module deployments.
What does the "_A/H" suffix mean in SM15T33AHE3_A/H?
The "_A/H" suffix in SM15T33AHE3_A/H denotes the packaging configuration: "A" indicates the revision code (Revision A per Vishay's documentation), and "H" specifies the preferred package code for 7-inch tape-and-reel delivery with 850 units per reel, compliant with JEDEC standards for SMT placement.
How does SM15T33AHE3_A/H differ from bidirectional TVS diodes like SM15T33CA?
SM15T33AHE3_A/H is unidirectional and features a cathode band marking; it conducts only in reverse breakdown. In contrast, SM15T33CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The unidirectional version offers lower leakage and tighter VBR tolerance, making SM15T33AHE3_A/H preferable for DC-biased lines such as power rails or sensor supplies.
What is the thermal resistance from junction to ambient for SM15T33AHE3_A/H?
The typical junction-to-ambient thermal resistance (RθJA) for SM15T33AHE3_A/H is 75 °C/W when mounted on the recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads. This value assumes still air convection and is used to estimate steady-state temperature rise under continuous power dissipation (PD = 6.5 W).
SM15T33AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, 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):
- 33A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T33AHE3_A/H FAQ
1.How can I place an order for SM15T33AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T33AHE3_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 SM15T33AHE3_A/H reliable?
The price and inventory of SM15T33AHE3_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 SM15T33AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T33AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T33AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T33AHE3_A/H?
SM15T33AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T33AHE3_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 SM15T33AHE3_A/H?
For technical support, including SM15T33AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T33AHE3_A/H requirements.
6.How does Aetrix verify that SM15T33AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T33AHE3_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 SM15T33AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T33AHE3_A/H?
All SM15T33AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T33AHE3_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 SM15T33AHE3_A/H part is unused and in its original packaging.
Return procedure for SM15T33AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T33AHE3_A/H 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 …
