My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T39CAHM3_A/H
- Part No.:
- SM15T39CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T39CAHM3_A/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,700
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T39CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR), and 53.9 V maximum clamping voltage (VC) at 28.0 A peak pulse current - used to protect automotive sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T39CAHM3_A/H datasheet, SM15T39CAHM3_A/H pinout, SM15T39CAHM3_A/H application, or SM15T39CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low-inductance SMC package, and verified 1500 W surge handling under IEC 61000-4-5 Level 4 threat conditions.
Technical Context
This device operates as a voltage-clamped crowbar during transient overvoltage events, with symmetrical forward/reverse conduction enabling bidirectional protection without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at VWM) across -65 °C to +150 °C operating range.
The SM15T39CAHM3_A/H delivers 53.9 V clamping at 28.0 A (10/1000 μs), achieving <1.5 ns response time and thermal resistance of 15 °C/W (junction-to-lead), supporting high-reliability placement on 8.0 mm × 8.0 mm copper pads per terminal per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 37.1 V / 41.0 V at 1.0 mA - precise bidirectional breakdown threshold ensuring predictable turn-on |
| VC @ IPPM | 53.9 V at 28.0 A (10/1000 μs) - limits downstream IC voltage stress to safe levels during surge |
| PPPM | 1500 W - sustains IEC 61000-4-5 4 kV/2 Ω surge waveform without degradation |
| TJ max | +150 °C - enables operation in under-hood automotive environments with no derating up to 125 °C ambient |
| Package | SMC (DO-214AB) - industry-standard 7.75 mm × 6.22 mm footprint compatible with automated SMT assembly |
| Qualification | AEC-Q101 qualified, halogen-free, RoHS-compliant - certified for automotive-grade production use |
Pinout & Package
SM15T39CAHM3_A/H uses a 2-terminal SMC (DO-214AB) package with no polarity marking (bidirectional). Terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, rated MSL level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (symmetrical) | Bidirectional conduction path - either terminal serves as input/output for transient energy diversion |
| Terminal 2 | Anode/Cathode (symmetrical) | Completes low-inductance clamping loop - requires equal copper pad area (8.0 mm × 8.0 mm) per terminal |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Withstands 4 kV IEC 61000-4-5 surge without failure, enabling single-device protection for CAN/LIN bus nodes |
| Glass-passivated junction | Ensures ±5% VBR tolerance and <1.0 μA leakage at VWM, critical for low-power sensor bias stability |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Low-inductance SMC package | Minimizes voltage overshoot during fast-rising transients (<100 ns), preserving clamping accuracy |
| Halogen-free & RoHS | Meets automotive OEM material compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) |
Applications
| Automotive Sensor Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting 3.3 V/5 V analog output sensors (e.g., pressure, temperature) in engine bay environments exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor signal line and ground, conducting only during >33.3 V excursions. Use Value: Limits transient voltage to ≤53.9 V, preventing damage to downstream ADC inputs and maintaining signal integrity during 100 A/10 ms surges. |
Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TJA1044) against ESD and coupled lightning surges on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transients between CAN_H and CAN_L lines without distorting 5 Mbps data waveforms. Use Value: Clamps differential surges to <60 V while adding <0.5 pF parasitic capacitance, preserving signal rise/fall times and bit error rate. |
| Industrial PLC I/O Protection | Telecom Power Interface |
Use Scenario: Shielding 24 V DC digital input modules in factory automation systems from relay-coil flyback and motor-drive noise. IC Role / Device Role / Timing Role: Standoff-rated protector installed at connector entry point, diverting >1 kV/500 A transients to chassis ground. Use Value: Survives repeated 1500 W surges with short-circuit failure mode, enabling fail-safe detection and system-level diagnostics. |
Use Scenario: Hardening 48 V PoE-powered Ethernet ports (IEEE 802.3af/at) against induced surges from nearby AC mains or lightning strikes. IC Role / Device Role / Timing Role: Bidirectional suppressor bridging power pair (VPoE/Return) to limit common-mode overvoltage on powered devices. Use Value: Maintains 33.3 V working voltage margin above nominal 48 V supply while clamping to 53.9 V within 1 ns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ33CA | Same SMC package, 33 V VWM, but lower PPPM = 400 W and non-AEC-Q101 rated | Suitable for commercial-grade industrial controls, not automotive under-hood use | Select when cost sensitivity outweighs automotive qualification and 1500 W surge requirement |
| ON Semiconductor SMCJ33CA | Identical 33 V VWM, 1500 W rating, but AEC-Q101 qualified only in HM3 variant (SMCJ33CAHM3) | Matches SM15T39CAHM3_A/H performance but differs in packaging code and reel configuration | Choose if existing BOM uses ON Semi's SMCJ family and tape-and-reel logistics align with HM3 delivery mode |
Compared with SMAJ33CA and SMCJ33CAHM3, SM15T39CAHM3_A/H provides identical clamping performance and AEC-Q101 validation while offering Vishay-specific halogen-free compliance and optimized thermal resistance (RθJL = 15 °C/W), improving long-term reliability in thermally constrained automotive PCB layouts.
Availability
SM15T39CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN/LIN bus protection, and industrial PLC I/O requiring stable component supply with full traceability and lifecycle management.
Supply support for SM15T39CAHM3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and testing facilities focused on high-reliability passive protection components.
The SM15T Series targets automotive and industrial transient suppression, engineered specifically for AEC-Q101 compliance, high surge robustness, and SMT manufacturability in harsh environments.
FAQ
What is the clamping voltage of SM15T39CAHM3_A/H at its rated peak pulse current?
The SM15T39CAHM3_A/H has a maximum clamping voltage (VC) of 53.9 V at 28.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SM15T39CAHM3_A/H maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is SM15T39CAHM3_A/H suitable for automotive applications?
Yes, SM15T39CAHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - explicitly intended for automotive use. Its 1500 W surge rating, 150 °C junction temperature limit, and MSL level 1 reflow compatibility meet requirements for engine control units, ADAS sensors, and body electronics. The "HM3" suffix in SM15T39CAHM3_A/H confirms its automotive-grade qualification status.
How does the bidirectional design of SM15T39CAHM3_A/H affect its circuit placement?
The SM15T39CAHM3_A/H has no polarity marking and conducts identically in both directions, allowing placement between any two nodes requiring symmetrical overvoltage protection - such as across differential signal pairs (CAN_H/CAN_L) or between supply and ground. Unlike unidirectional TVS diodes, the SM15T39CAHM3_A/H eliminates orientation errors during SMT assembly and supports AC-coupled or floating-line protection without external biasing.
What is the thermal resistance specification for SM15T39CAHM3_A/H?
SM15T39CAHM3_A/H has a typical thermal resistance of 15 °C/W from junction to lead (RθJL) and 75 °C/W from junction to ambient air (RθJA). These values assume mounting on 8.0 mm × 8.0 mm copper pads per terminal, per JEDEC test condition. The low RθJL enables efficient heat transfer to PCB copper, supporting sustained operation at 6.5 W power dissipation when heatsinked.
Does SM15T39CAHM3_A/H meet IEC 61000-4-5 surge immunity standards?
Yes, SM15T39CAHM3_A/H is rated for 1500 W peak pulse power with a 10/1000 μs waveform - directly aligned with IEC 61000-4-5 Level 4 (4 kV line-to-ground, 2 Ω source impedance). Its 53.9 V clamping voltage at 28.0 A ensures protected circuits remain below semiconductor absolute maximum ratings during full-standard surge events, making SM15T39CAHM3_A/H appropriate for front-end protection in industrial and automotive equipment.
SM15T39CAHM3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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)
SM15T39CAHM3_A/H FAQ
1.How can I place an order for SM15T39CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T39CAHM3_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 SM15T39CAHM3_A/H reliable?
The price and inventory of SM15T39CAHM3_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 SM15T39CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T39CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T39CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T39CAHM3_A/H?
SM15T39CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T39CAHM3_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 SM15T39CAHM3_A/H?
For technical support, including SM15T39CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T39CAHM3_A/H requirements.
6.How does Aetrix verify that SM15T39CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T39CAHM3_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 SM15T39CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T39CAHM3_A/H?
All SM15T39CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T39CAHM3_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 SM15T39CAHM3_A/H part is unused and in its original packaging.
Return procedure for SM15T39CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T39CAHM3_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 …
