My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC24CAHM3/I
- Part No.:
- 1.5SMC24CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24CAHM3/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,370
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC24CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 24 V standoff voltage (VWM), 27.4 V minimum breakdown voltage (VBR), 33.2 V maximum clamping voltage (VC) at 45.2 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC24CAHM3/I datasheet, 1.5SMC24CAHM3/I pinout, 1.5SMC24CAHM3/I application, or 1.5SMC24CAHM3/I equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification, SMC (DO-214AB) package thermal resistance (RθJL = 15 °C/W), and compliance with UL 497B surge protector classification.
Technical Context
The 1.5SMC24CAHM3/I operates as a bidirectional avalanche diode, delivering symmetrical clamping in both polarities without polarity marking. Its glass-passivated junction enables fast response time (<1.0 ns) and low incremental surge resistance, critical for suppressing ESD and lightning-induced transients.
Rated for -65 °C to +150 °C junction temperature, it supports repetitive surge duty cycles up to 0.01 % and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device is halogen-free, RoHS-compliant, and AEC-Q101 qualified under HM3 automotive ordering code.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR (Breakdown Voltage) | 22.8 V to 25.2 V at 1.0 mA - Voltage at which avalanche conduction initiates; ensures predictable turn-on threshold. |
| VC (Clamping Voltage) | 33.2 V at 45.2 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 1500 W - Surge energy handling capacity under standardized 10/1000 μs waveform; validates robustness against IEC 61000-4-5 threats. |
| RθJL (Junction-to-Lead Thermal Resistance) | 15 °C/W - Enables efficient heat transfer to PCB copper pads; supports sustained power dissipation in compact layouts. |
| TJ max. | +150 °C - Maximum allowable junction temperature; permits operation in under-hood automotive and high-ambient industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional operation | Enables clamping during positive or negative transients without external polarity orientation. |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional operation | Eliminates need for directional placement on PCB - simplifies layout and automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Provides symmetrical overvoltage protection on AC lines or differential signals without polarity constraints. |
| 1500 W peak pulse power | Withstands high-energy surges per IEC 61000-4-5 Level 4 (4 kV line-earth) when mounted on 8 mm × 8 mm copper pads. |
| AEC-Q101 qualification (HM3) | Validated for automotive applications including engine control units, ADAS sensors, and infotainment power rails. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns response), improving protection margin. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C peak - no baking required prior to assembly. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS pressure/temperature sensors from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between sensor signal line and ground, absorbing ±300 V transients. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V analog front-end ICs while maintaining signal integrity below 33.2 V clamping threshold. |
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from field wiring surges and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage shunt across input terminals, activated within nanoseconds of transient onset. Use Value: Ensures uninterrupted operation during 1 kV/500 A surge tests per IEC 61000-4-5, preserving measurement accuracy and system uptime. |
| Telecom Line Protection | Consumer Power Adapter Output |
|
Use Scenario: Safeguarding Ethernet PHY interface and PoE injectors against lightning-induced common-mode surges on twisted-pair cables. IC Role / Device Role / Timing Role: Bidirectional suppression element across differential pairs or line-to-ground, rated for repeated 10/1000 μs events. Use Value: Limits induced voltage to ≤33.2 V, preventing damage to magnetics, isolation barriers, and PHY transceivers in IEEE 802.3af/at systems. |
Use Scenario: Secondary-side overvoltage clamp on 5 V/9 V/12 V USB-C and wall adapter outputs exposed to capacitor discharge or feedback loop faults. IC Role / Device Role / Timing Role: Fast-acting crowbar device that diverts fault current away from downstream USB PD controllers and load switches. Use Value: Maintains output regulation integrity during 1500 W surge events, avoiding false OVP shutdowns and enabling fail-safe power delivery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Lower PPPM (600 W), same VWM (20.5 V), larger SMB package (DO-214AA), RθJL = 20 °C/W | Less suitable for high-energy IEC 61000-4-5 Level 4 testing; limited to lower-power industrial ports | Select when board space allows larger footprint and surge requirements are ≤600 W. |
| 1.5KE24CA | Through-hole TO-218 package, identical electrical specs but higher RθJA (60 °C/W), no AEC-Q101 qualification | Not suitable for automotive or high-density SMT designs; requires wave soldering or hand assembly | Choose only for legacy through-hole systems where rework flexibility outweighs AEC-Q101 and thermal needs. |
Compared with SMBJ24CA and 1.5KE24CA, the 1.5SMC24CAHM3/I delivers superior surge robustness (1500 W vs. 600 W/1500 W), automotive qualification, and optimized thermal performance in a compact SMC footprint - making it the preferred choice for next-generation automotive and industrial SMT designs requiring guaranteed reliability.
Availability
1.5SMC24CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line surge suppression requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for 1.5SMC24CAHM3/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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series is engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and precise clamping performance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC24CAHM3/I at its rated peak pulse current?
The 1.5SMC24CAHM3/I has a maximum clamping voltage (VC) of 33.2 V at 45.2 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC24CAHM3/I suitable for automotive applications?
Yes, the 1.5SMC24CAHM3/I is AEC-Q101 qualified under the HM3 automotive ordering code, confirming compliance with stress tests including temperature cycling, high-temperature reverse bias, and ESD. It is explicitly intended for use in automotive subsystems such as body control modules, ADAS sensor interfaces, and powertrain ECUs where reliability under extended temperature and vibration is required.
What does the "CA" suffix indicate in 1.5SMC24CAHM3/I?
The "CA" suffix in 1.5SMC24CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities without cathode band marking. This distinguishes it from unidirectional variants (e.g., "A" suffix) and enables simplified placement on AC-coupled or differential signal lines where polarity reversal may occur.
What is the thermal resistance from junction to leads (RθJL) for the 1.5SMC24CAHM3/I?
The 1.5SMC24CAHM3/I has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, measured under standard mounting conditions. This low value enables efficient heat transfer from the silicon die to the PCB copper pads, supporting reliable operation at elevated ambient temperatures and during repetitive surge events - especially important in enclosed automotive or industrial enclosures.
How does the 1.5SMC24CAHM3/I differ from the commercial-grade 1.5SMC24CA-E3/57T?
The 1.5SMC24CAHM3/I differs from 1.5SMC24CA-E3/57T in three key ways: it uses halogen-free molding compound (HM3 vs. E3), carries AEC-Q101 qualification (not present in E3), and ships in 13-inch tape-and-reel (I) versus 7-inch (57T). These distinctions make the 1.5SMC24CAHM3/I suitable for automotive production and environmentally regulated markets where halogen-free content and automotive reliability validation are mandatory.
1.5SMC24CAHM3/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:
- -
- 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):
- 45.2A
- 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)
1.5SMC24CAHM3/I FAQ
1.How can I place an order for 1.5SMC24CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24CAHM3/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 1.5SMC24CAHM3/I reliable?
The price and inventory of 1.5SMC24CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC24CAHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC24CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24CAHM3/I?
1.5SMC24CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24CAHM3/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 1.5SMC24CAHM3/I?
For technical support, including 1.5SMC24CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC24CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24CAHM3/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 1.5SMC24CAHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC24CAHM3/I?
All 1.5SMC24CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24CAHM3/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 1.5SMC24CAHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC24CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24CAHM3/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 …
