My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T30CAHM3_A/I
- Part No.:
- SM15T30CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30CAHM3_A/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,995
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T30CAHM3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30 V standoff voltage (VWM), and clamping voltage of 41.5 V at 36 A peak pulse current. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T30CAHM3_A/I datasheet, SM15T30CAHM3_A/I pinout, SM15T30CAHM3_A/I application, or SM15T30CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and verified 1500 W surge handling per JEDEC-standard waveform.
Technical Context
The SM15T30CAHM3_A/I operates as a bidirectional avalanche diode with symmetrical breakdown behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable leakage (<1.0 μA at 25.6 V) and repeatable clamping performance across temperature.
Designed for high-impedance source environments, it sustains 36 A peak pulse current (IPPM) under 10/1000 μs waveform while limiting transient voltage to ≤41.5 V - critical for safeguarding 3.3 V/5 V logic interfaces and MOSFET gate drivers. Thermal resistance (RθJA = 75 °C/W) supports operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 25.6 V - maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit's normal operating range |
| VBR min/max | 28.5 V / 31.5 V at 1.0 mA - guaranteed avalanche initiation window; ensures predictable turn-on during overvoltage events |
| VC @ IPPM | 41.5 V at 36 A (10/1000 μs) - clamped voltage seen by downstream ICs; determines minimum safe margin for protected device's absolute max rating |
| PPPM | 1500 W - peak transient energy absorption capacity; validates suitability for IEC 61000-4-5 Level 3/4 surge testing |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive and industrial enclosures without derating |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place |
Pinout & Package
SM15T30CAHM3_A/I uses the SMC (DO-214AB) package: a molded plastic case with two coplanar matte tin-plated leads, no polarity marking (bidirectional), and UL 94 V-0 flammability rating. Mounting requires 8.0 mm × 8.0 mm copper pads per terminal per JEDEC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | One terminal of bidirectional avalanche junction | Electrically symmetric with cathode; either lead may connect to line or ground in AC or differential protection schemes |
| Cathode | Other terminal of bidirectional avalanche junction | No functional distinction from anode; absence of band marking confirms bidirectional configuration per ordering code "CA" |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22-A114; supports under-hood and ADAS sensor applications |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-020 MSL level 1; enables use in green manufacturing and export-controlled programs |
| Low clamping ratio (VC/VBR) | 41.5 V / 28.5 V ≈ 1.46 - tight voltage control minimizes stress on protected 3.3 V/5 V ICs during 1 kV/500 A surge events |
| 1500 W peak pulse power | Exceeds IEC 61000-4-5 open-circuit test requirements for Level 4 (4 kV); eliminates need for cascaded protection stages |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers in engine control modules from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair to clamp common-mode surges without disrupting DC bias. Use Value: Clamps to 41.5 V within nanoseconds, preserving transceiver integrity during 100 V/50 ms load dump events per ISO 7637-2 Pulse 5a. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from inductive kickback of solenoid valves. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between field input and internal optocoupler, absorbing >1 kA surge currents. Use Value: Withstands 36 A peak pulse current at 10/1000 μs, preventing false triggering and latch-up in isolated input stages. |
| Telecom Line Interface | Consumer Power Adapter ESD |
Use Scenario: Safeguarding Ethernet PHY interface pins in PoE-powered switches against lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Bidirectional clamping device mounted at connector entry point, shunting common-mode transients to chassis ground. Use Value: Low 75 °C/W thermal resistance enables sustained operation at 85 °C ambient during multi-port surge testing per IEC 61000-4-5. |
Use Scenario: Adding secondary-level surge immunity to USB-C power delivery circuits in smart home hubs after primary MOV filtering. IC Role / Device Role / Timing Role: Fast-response TVS placed across VBUS/GND to suppress ESD (IEC 61000-4-2 ±15 kV) and fast-rising line transients. Use Value: Glass-passivated junction delivers <1.0 μA leakage at 25.6 V, avoiding standby current drain in always-on battery-backed systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA | Same 30 V VWM, but lower 400 W PPPM; SOD-123 package (smaller footprint, higher RθJA) | Not suitable for IEC 61000-4-5 Level 4; limited to consumer-grade ESD and low-energy switching noise | Select SMAJ30CA only when board space is constrained and surge threat level is ≤Level 2. |
| SMCJ30CA | Identical 30 V VWM and 1500 W rating, but non-AEC-Q101 commercial grade; same SMC package | Lacks automotive qualification; not approved for safety-critical vehicle subsystems per ISO 26262 | Choose SMCJ30CA for cost-sensitive industrial equipment where AEC-Q101 is not mandated. |
Compared with SMAJ30CA and SMCJ30CA, the SM15T30CAHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, and full 1500 W surge capability in a single SMC package - making it the only option qualified for automotive powertrain and ADAS sensor protection without design compromise.
Availability
SM15T30CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SM15T30CAHM3_A/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, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability and application-specific performance.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure modes must be controlled and surge immunity must exceed IEC/ISO standards.
FAQ
What does the "CA" suffix indicate in SM15T30CAHM3_A/I?
The "CA" suffix in SM15T30CAHM3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both polarities. This allows it to protect AC-coupled signals, differential buses like CAN or RS-485, and floating power domains without requiring polarity-aware layout. Unlike unidirectional variants (e.g., SM15T30A), SM15T30CAHM3_A/I has no cathode band marking and exhibits identical VBR and VC characteristics in either direction.
Is SM15T30CAHM3_A/I qualified for automotive applications?
Yes, SM15T30CAHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SM15T series datasheet (Rev. 09-Jan-2024, Doc. #88380). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, making SM15T30CAHM3_A/I suitable for use in engine control units, ADAS sensors, and body electronics where automotive reliability is mandatory.
What is the maximum clamping voltage of SM15T30CAHM3_A/I under surge conditions?
The maximum clamping voltage of SM15T30CAHM3_A/I is 41.5 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 36 A. This value is measured per Figure 1 and Table on page 2 of the official datasheet and represents the worst-case voltage imposed on protected circuitry during standardized surge events - a critical parameter for ensuring compatibility with 3.3 V or 5 V logic interfaces downstream.
How does the HM3 suffix differ from E3 or M3 in SM15T30CAHM3_A/I?
The HM3 suffix in SM15T30CAHM3_A/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from E3 (RoHS-compliant commercial grade), M3 (halogen-free RoHS commercial grade), and HE3 (RoHS-compliant AEC-Q101). The "HM3" designation ensures SM15T30CAHM3_A/I meets both environmental compliance and automotive reliability requirements simultaneously, verified per JESD22 and AEC test plans.
Can SM15T30CAHM3_A/I replace SM15T30A in an existing design?
No - SM15T30CAHM3_A/I cannot directly replace unidirectional SM15T30A without layout review. While both share identical VWM, VBR, and PPPM, SM15T30A is unidirectional (cathode-banded) and intended for DC rail protection, whereas SM15T30CAHM3_A/I is bidirectional (no band) and suited for AC or differential signal lines. Substitution would require verifying polarity alignment and confirming that clamping symmetry meets system-level surge requirements.
SM15T30CAHM3_A/I 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:
- -
- Bidirectional Channels:
- 1
- 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 (SMC)
SM15T30CAHM3_A/I FAQ
1.How can I place an order for SM15T30CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30CAHM3_A/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 SM15T30CAHM3_A/I reliable?
The price and inventory of SM15T30CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T30CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T30CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30CAHM3_A/I?
SM15T30CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30CAHM3_A/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 SM15T30CAHM3_A/I?
For technical support, including SM15T30CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30CAHM3_A/I requirements.
6.How does Aetrix verify that SM15T30CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T30CAHM3_A/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 SM15T30CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T30CAHM3_A/I?
All SM15T30CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30CAHM3_A/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 SM15T30CAHM3_A/I part is unused and in its original packaging.
Return procedure for SM15T30CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30CAHM3_A/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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
