My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T30AHE3/9AT
- Part No.:
- SM15T30AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30AHE3/9AT.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,888
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T30AHE3/9AT 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), 30 V standoff voltage (VWM = 25.6 V), 41.5 V clamping voltage at 36 A IPPM, and AEC-Q101 qualified for automotive use. It protects MOSFETs and sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T30AHE3/9AT datasheet, SM15T30AHE3/9AT pinout, SM15T30AHE3/9AT application, or SM15T30AHE3/9AT equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, and SMC package thermal resistance (RθJA = 75 °C/W).
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (28.5–31.5 V), it avalanches to divert transient current away from downstream circuitry. Its low-inductance SMC package and glass-passivated junction ensure fast response (<1 ns) and stable clamping under repetitive stress.
Designed for high-energy threats, it sustains 1500 W peak pulse power per 10/1000 μs waveform with derating above 25 °C, and fails short-circuit in overstress-enabling predictable system-level fault containment. Thermal resistance (RθJL = 15 °C/W) supports reliable operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 25.6 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe DC bias margin. |
| VBR (min/max) | 28.5 V / 31.5 V - Breakdown occurs within this range at 1 mA test current; ensures consistent avalanche initiation. |
| VC @ IPPM | 41.5 V at 36 A - Clamping voltage during 10/1000 μs surge; limits protected IC voltage stress to ≤41.5 V. |
| PPPM | 1500 W - Peak pulse power handling capability; enables protection against lightning and motor-switching transients. |
| TJ max. | 150 °C - Maximum junction temperature; supports under-hood automotive environments with proper PCB copper pad layout. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8 mm × 8 mm copper pads; guides heatsinking requirements. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to ground or low-side reference; completes shunt path during reverse overvoltage events. |
| Cathode | Reverse-biased input terminal | Connected to protected line (e.g., sensor supply or signal); avalanche initiates here when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without derating on standard PCB pads. |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics; includes temperature cycling, HTRB, and ESD testing per stress requirements. |
| Glass passivated chip junction | Ensures long-term reliability and stable VBR over 1000+ hours at 85 °C/85% RH; eliminates moisture-induced parameter drift. |
| Low inductance SMC package | Minimizes voltage overshoot during fast transients (di/dt > 100 A/μs); critical for protecting high-speed sensor interfaces. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting analog output lines of ABS wheel speed sensors exposed to load-dump and inductive kickback in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between sensor VOUT and chassis ground. Use Value: Clamps transients to ≤41.5 V, preventing damage to downstream ADC inputs while maintaining signal integrity below 25.6 V normal operation. |
Use Scenario: Safeguarding encoder feedback lines in servo drives subjected to switching noise from 400 V IGBT inverters. IC Role / Device Role / Timing Role: Line-to-ground TVS on differential RS-422 encoder channels. Use Value: Absorbs 36 A surge current without degradation, preserving position accuracy during motor start/stop cycles. |
| Telecom Power Input Stage | Consumer Appliance Control Board |
Use Scenario: Secondary-side DC input protection for PoE-powered network switches experiencing Ethernet cable ESD and surge coupling. IC Role / Device Role / Timing Role: Unidirectional TVS on 48 V DC input rail upstream of DC/DC converter. Use Value: Limits clamped voltage to 41.5 V, ensuring converter IC survives 1500 W transients without latch-up or gate oxide rupture. |
Use Scenario: Overvoltage suppression on microcontroller GPIO lines connected to push-button interfaces in washing machine control panels. IC Role / Device Role / Timing Role: Localized TVS on each button trace, cathode to MCU pin, anode to GND. Use Value: Prevents ESD-induced reset or latch-up during user interaction, with <1 μA leakage at 25.6 V ensuring battery runtime compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same VWM (25.6 V) and VC (41.5 V), but lower PPPM (400 W); SOD-123 package (RθJA = 150 °C/W). | Not suitable for lightning-level threats; limited to board-level ESD and low-energy switching noise. | Select SMAJ30A only for space-constrained consumer designs where 1500 W surge immunity is not required. |
| SMCJ30A | Identical electrical specs (VWM, VBR, VC, PPPM) and SMC package, but commercial-grade (E3 suffix), not AEC-Q101 qualified. | Lacks automotive qualification testing; unsuitable for under-hood or safety-critical modules. | Choose SMCJ30A for industrial or telecom applications where AEC-Q101 is not mandated and cost is prioritized. |
Compared with SMAJ30A and SMCJ30A, SM15T30AHE3/9AT uniquely combines 1500 W surge capability, AEC-Q101 qualification, and SMC thermal performance-making it the only option for automotive-grade 30 V rail protection requiring validated reliability under temperature and humidity stress.
Availability
SM15T30AHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive I/O, and telecom power input stage applications requiring stable component supply across extended production lifecycles.
Supply support for SM15T30AHE3/9AT 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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments-targeting automotive powertrain, industrial automation, and infrastructure equipment where failure modes must be predictable and survivable.
FAQ
What is the clamping voltage of SM15T30AHE3/9AT at its rated peak pulse current?
The SM15T30AHE3/9AT has a maximum clamping voltage (VC) of 41.5 V at 36 A peak pulse current (IPPM) 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, and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T30AHE3/9AT suitable for bidirectional transient protection?
No, SM15T30AHE3/9AT is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SM15T30CA); using SM15T30AHE3/9AT in bidirectional applications may result in forward conduction and failure during negative transients.
What does the "HE3" suffix indicate in SM15T30AHE3/9AT?
The "HE3" suffix in SM15T30AHE3/9AT denotes RoHS-compliant construction and AEC-Q101 qualification. It distinguishes this automotive-grade variant from commercial versions (e.g., "E3") and confirms compliance with stress tests including temperature cycling, highly accelerated life testing, and ESD per JESD22-A114.
How does the thermal performance of SM15T30AHE3/9AT compare to smaller packages like SMAJ?
SM15T30AHE3/9AT uses the SMC (DO-214AB) package with RθJA = 75 °C/W on standard pads-significantly better than SMAJ's SOD-123 (RθJA ≈ 150 °C/W). This allows SM15T30AHE3/9AT to sustain higher average power dissipation and maintain lower junction temperatures during repeated transients, especially critical in automotive under-hood locations.
Can SM15T30AHE3/9AT replace SM15T33A in a 3.3 V logic interface?
No-SM15T30AHE3/9AT is not appropriate for 3.3 V logic interfaces. Its 25.6 V standoff voltage (VWM) far exceeds 3.3 V rail requirements, risking insufficient clamping margin. For 3.3 V systems, lower-voltage TVS devices such as SMBJ3.3A or SMLJ3.3A with matched VWM and VC are required; SM15T30AHE3/9AT is designed for 24–30 V industrial and automotive rails.
SM15T30AHE3/9AT 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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)
SM15T30AHE3/9AT FAQ
1.How can I place an order for SM15T30AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30AHE3/9AT 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 SM15T30AHE3/9AT reliable?
The price and inventory of SM15T30AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T30AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T30AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30AHE3/9AT?
SM15T30AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30AHE3/9AT 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 SM15T30AHE3/9AT?
For technical support, including SM15T30AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30AHE3/9AT requirements.
6.How does Aetrix verify that SM15T30AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T30AHE3/9AT 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 SM15T30AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T30AHE3/9AT?
All SM15T30AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30AHE3/9AT, 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 SM15T30AHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T30AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30AHE3/9AT 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 …
