My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T24CAHE3/9AT
- Part No.:
- SM15T24CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T24CAHE3/9AT.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,469
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T24CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on signal and power lines. It features 24 V standoff voltage (VWM), 27.2 V minimum breakdown voltage (VBR), 33.2 V maximum clamping voltage at 45 A IPPM, 1500 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive applications.
For engineers reviewing the SM15T24CAHE3/9AT datasheet, SM15T24CAHE3/9AT pinout, SM15T24CAHE3/9AT application, or SM15T24CAHE3/9AT equivalent, this device is selected for robust I/O line protection against lightning-induced surges, inductive switching transients, and ESD events in automotive sensor interfaces, industrial control inputs, and telecom power rails where bidirectional clamping and low clamping ratio are critical.
Technical Context
The SM15T24CAHE3/9AT operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at 20.5 V).
Thermal design relies on its RθJL of 15 °C/W to leads and RθJA of 75 °C/W (on 8 mm × 8 mm copper pads), supporting sustained 6.5 W power dissipation at 50 °C ambient. The device fails short-circuit under overstress, aligning with fail-safe system architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min) | 27.2 V - Minimum breakdown voltage at 1 mA test current; ensures reliable conduction onset above normal operating transients. |
| VC @ IPPM | 33.2 V - Clamping voltage at 45 A peak pulse current (10/1000 μs); limits downstream voltage stress during surge events. |
| PPPM | 1500 W - Peak pulse power handling capability; supports protection against lightning-induced surges per IEC 61000-4-5 Level 4. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; required for engine control, ADAS, and body electronics. |
| Package | SMC (DO-214AB) - Surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
SM15T24CAHE3/9AT uses the SMC (DO-214AB) package - a two-terminal surface-mount case with no polarity marking for bidirectional devices. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional clamping node | No functional distinction between terminals; either terminal may connect to protected line or ground - enables flexible layout in AC or floating circuits. |
| Case (body) | Non-electrical mechanical interface | Plastic molding meets UL 94 V-0 flammability rating; provides mechanical stability and thermal path to PCB copper pads. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive equipment without external series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.22) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers or microcontroller GPIOs during fast transients. |
| AEC-Q101 qualification (HE3 suffix) | Confirms long-term reliability under automotive temperature cycling (-40 °C to +125 °C), humidity, and vibration conditions. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| Low leakage (<1 μA at VWM) | Prevents signal distortion or battery drain in always-on sensor interfaces and low-power IoT nodes. |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting analog and digital signal lines from load-dump and inductive kickback in engine control modules and radar sensors. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between sensor output and microcontroller input or CAN bus transceiver. Use Value: Limits transient voltage to ≤33.2 V during 45 A surges, preserving signal integrity and preventing latch-up in A/D converters and CAN PHYs. |
Use Scenario: Shielding 24 V DC digital input channels on programmable logic controllers from field wiring surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary surge suppression element across input terminals, upstream of optocoupler or Schmitt trigger input stage. Use Value: Withstands repeated 1500 W pulses without degradation, extending maintenance intervals and reducing spurious fault triggers in factory automation. |
| Telecom Power Rail Protection | Consumer USB-C Port Protection |
Use Scenario: Safeguarding 24 V auxiliary power rails in base station remote radio units exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on DC-DC converter output, coordinated with upstream GDT or MOV for staged protection. Use Value: Fast response (<1 ns) and low clamping voltage prevent overvoltage damage to PMICs and FPGAs during multi-kV line-to-ground transients. |
Use Scenario: Bidirectional overvoltage protection on VBUS and CC lines in USB-C receptacles subjected to hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF) placed directly at connector, shunting transients to chassis ground. Use Value: Maintains signal integrity up to 10 Mbps while clamping ±15 kV contact ESD per IEC 61000-4-2, meeting USB-IF compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ24CA | Same 24 V VWM, 33.2 V VC @ 45.5 A, but rated at 400 W (SMA package); smaller footprint, lower PPPM. | Limited to lower-energy threats (IEC 61000-4-2 only); unsuitable for IEC 61000-4-5 Level 4 surge testing. | Select SMAJ24CA only when board space is constrained and surge threat level is limited to ESD and low-energy transients. |
| ON Semiconductor 1.5KE24CA | Through-hole DO-201 package, same 24 V VWM and 33.2 V VC, but higher thermal resistance (RθJA ≈ 100 °C/W) and no AEC-Q101 qualification. | Requires manual assembly; not approved for automotive production; less suitable for high-reliability industrial deployments. | Choose 1.5KE24CA for prototyping or cost-sensitive non-automotive applications where SMT is not required. |
Compared with SMAJ24CA and 1.5KE24CA, SM15T24CAHE3/9AT delivers 3.75× higher peak pulse power in an AEC-Q101-qualified SMT package, enabling single-device compliance with automotive and industrial surge standards without layout compromise or secondary protection stages.
Availability
SM15T24CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, and telecom power rail protection requiring stable component supply, AEC-Q101 traceability, and 1500 W surge immunity.
Supply support for SM15T24CAHE3/9AT 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SM15T Series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where failure modes must be predictable and clamping performance tightly controlled.
FAQ
What is the clamping voltage of SM15T24CAHE3/9AT at its rated peak pulse current?
The SM15T24CAHE3/9AT has a maximum clamping voltage (VC) of 33.2 V at 45 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC and is guaranteed across the full operating temperature range of -65 °C to +150 °C. The clamping voltage ensures downstream components remain within safe operating limits during surge events.
Is SM15T24CAHE3/9AT suitable for automotive applications?
Yes, SM15T24CAHE3/9AT is AEC-Q101 qualified, as indicated by the "HE3" suffix. It has passed stress tests including temperature cycling, high-temperature reverse bias, and ESD per JESD22-A114. This qualification confirms its suitability for under-hood and cabin electronics such as engine control units, ADAS camera modules, and body control modules where reliability under thermal and mechanical stress is mandatory.
How does the bidirectional configuration of SM15T24CAHE3/9AT affect its circuit placement?
The SM15T24CAHE3/9AT has no polarity marking and functions identically in both directions, allowing placement across any two points needing symmetrical overvoltage protection - such as differential signal pairs, AC-coupled lines, or floating power rails. Unlike unidirectional TVS diodes, it eliminates orientation errors during assembly and simplifies layout for balanced protection schemes without requiring ground reference assumptions.
What is the thermal resistance of SM15T24CAHE3/9AT, and how does it impact PCB layout?
SM15T24CAHE3/9AT has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures during repetitive surges, designers must provide adequate copper area and avoid thermal bottlenecks in traces - especially critical in automotive and industrial applications where ambient temperatures exceed 85 °C.
Does SM15T24CAHE3/9AT require additional series impedance for effective surge protection?
No, SM15T24CAHE3/9AT is designed for direct parallel connection to protected lines and does not require external series impedance to achieve its rated 1500 W pulse power. However, coordination with upstream devices (e.g., gas discharge tubes or polymer PTCs) may be needed in multi-stage protection architectures to manage energy distribution and ensure proper let-through voltage compliance per IEC 61000-4-5.
SM15T24CAHE3/9AT 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 45A
- 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)
SM15T24CAHE3/9AT FAQ
1.How can I place an order for SM15T24CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T24CAHE3/9AT 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 SM15T24CAHE3/9AT reliable?
The price and inventory of SM15T24CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T24CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T24CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T24CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T24CAHE3/9AT?
SM15T24CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T24CAHE3/9AT 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 SM15T24CAHE3/9AT?
For technical support, including SM15T24CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T24CAHE3/9AT requirements.
6.How does Aetrix verify that SM15T24CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T24CAHE3/9AT 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 SM15T24CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T24CAHE3/9AT?
All SM15T24CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T24CAHE3/9AT, 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 SM15T24CAHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T24CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T24CAHE3/9AT 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 …
