My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC39AHM3/I
- Part No.:
- 1.5SMC39AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39AHM3/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,245
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC39AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 39 V breakdown voltage (VBR = 37.1–41.0 V at 1 mA), 33.3 V stand-off voltage (VWM), and 53.9 V maximum clamping voltage (VC) at 27.8 A peak pulse current. It delivers 1500 W peak pulse power (10/1000 µs), operates from –65 °C to +150 °C, and is halogen-free, RoHS-compliant, and AEC-Q101 qualified for automotive applications.
For engineers reviewing the 1.5SMC39AHM3/I datasheet, 1.5SMC39AHM3/I pinout, 1.5SMC39AHM3/I application, or 1.5SMC39AHM3/I equivalent, this device serves as a robust overvoltage protection component for DC power rails, sensor interfaces, and automotive ECUs where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.38), and high surge reliability are required.
Technical Context
The 1.5SMC39AHM3/I uses a glass-passivated silicon junction optimized for transient suppression with low incremental surge resistance and excellent clamping linearity under repetitive 10/1000 µs surges at 0.01% duty cycle. Its unidirectional polarity features a cathode band marking and supports forward conduction only during reverse transients.
Thermally, it exhibits RθJA = 75 °C/W (on recommended 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W, enabling stable operation up to TJ = 150 °C. It meets J-STD-020 MSL Level 1 (260 °C peak reflow) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at IT = 1 mA - defines precise breakdown threshold for reliable triggering above normal operating voltage |
| VWM | 33.3 V - maximum continuous reverse working voltage before leakage exceeds 1 µA, ensuring no false triggering in 33 V systems |
| VC @ IPPM | 53.9 V at 27.8 A - clamping voltage limits downstream IC stress during 1500 W transients, keeping protected circuit below safe voltage ceiling |
| PPPM | 1500 W (10/1000 µs waveform) - enables handling of severe lightning-induced or inductive-switching surges without degradation |
| IFSM | 200 A (8.3 ms half-sine) - supports high-energy single-event surge immunity in power supply input stages |
| TJ range | –65 °C to +150 °C - ensures operational reliability across automotive under-hood and industrial ambient extremes |
| 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 placement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse transient return path | Connected to system ground or low-side reference; completes clamping loop during overvoltage events |
| Cathode | Reverse-biased terminal / clamping node | Connected to protected line (e.g., 33 V rail); conducts when transient exceeds VWM, shunting energy to ground |
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 in standard PCB layouts |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per automotive qualification standards |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC JS709E, supporting environmentally regulated production and end-of-life compliance |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or damage to 3.3 V/5 V logic interfacing with protected 33 V lines |
| MSL Level 1 (260 °C peak) | Allows single-reflow soldering without moisture sensitivity concerns, eliminating bake requirements and streamlining SMT assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 33 V battery-supplied ECUs (e.g., body control modules) from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 33 V rail and chassis ground, clamping within <1 ns to limit voltage to ≤54 V. Use Value: Prevents MOSFET gate oxide rupture and microcontroller brownout during 120 V/50 ms load dump events. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC I/O modules exposed to motor switching noise. IC Role / Device Role / Timing Role: TVS mounted at sensor connector entry point, shunting induced spikes on 24 V signal lines before reaching ADC front-end. Use Value: Maintains ±0.1% measurement accuracy by limiting transient-induced offset drift and preventing comparator false triggering. |
| Telecom DC Power Input Protection | Consumer Device USB-C Power Delivery Line |
Use Scenario: Securing 48 V PoE++ (IEEE 802.3bt) inputs in network switches against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary TVS on DC input stage, coordinated with upstream GDT and downstream π-filter for staged surge attenuation. Use Value: Absorbs >95% of 1500 W surge energy while holding clamp voltage below 60 V, preserving PMIC and Ethernet PHY integrity. |
Use Scenario: Overvoltage guard on VBUS line of USB-C ports in portable monitors accepting 20 V PD input. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor between VBUS and ground, sized to handle 33 V transients from hot-plug or adapter fault. Use Value: Prevents catastrophic failure of USB-C controller ICs (e.g., TUSB546) during 30 V/100 ns ESD or miswiring events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Lower PPPM (400 W), lower VBR (31.4–34.7 V), SMA package (smaller thermal mass) | Suitable for cost-sensitive consumer electronics with lower surge threat profiles (IEC 61000-4-2 only) | Select when board space is constrained and 33 V clamping suffices; not recommended for automotive or industrial surge environments. |
| 1.5KE39A | Through-hole DO-201 package, same VBR/VC, but higher RθJA (~100 °C/W) and no AEC-Q101 qualification | Used in legacy industrial power supplies where manual assembly or high-reliability through-hole mounting is preferred | Choose only for non-automotive, non-SMT designs requiring identical electrical specs but accepting larger footprint and no automotive qualification. |
Compared with SMAJ33A-E3/57T and 1.5KE39A, the 1.5SMC39AHM3/I uniquely combines AEC-Q101 qualification, 1500 W surge capability, SMC surface-mount compatibility, and halogen-free construction-making it the sole option meeting full automotive-grade surge protection requirements in compact PCB layouts.
Availability
1.5SMC39AHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power inputs, and USB-C PD systems requiring stable component supply, long-term lifecycle support, and certified surge resilience.
Supply support for 1.5SMC39AHM3/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 high-reliability diodes, rectifiers, and protection devices with emphasis on automotive, industrial, and computing applications.
The 1.5SMC Series was designed specifically for surface-mount transient suppression in harsh environments, delivering high-power surge handling in compact packages with automotive-qualified variants for mission-critical electronics.
FAQ
What is the clamping voltage of the 1.5SMC39AHM3/I at its rated peak pulse current?
The 1.5SMC39AHM3/I has a maximum clamping voltage (VC) of 53.9 V at its rated peak pulse current (IPPM) of 27.8 A, measured using the standardized 10/1000 µs double-exponential waveform. This value ensures that protected circuits remain below critical voltage thresholds during high-energy transients, and it is guaranteed across the full operating temperature range of –65 °C to +150 °C. The 1.5SMC39AHM3/I achieves this performance with a clamping ratio of approximately 1.38 relative to its nominal breakdown voltage.
Is the 1.5SMC39AHM3/I suitable for automotive applications?
Yes, the 1.5SMC39AHM3/I is explicitly qualified to AEC-Q101 standards, as confirmed by its HM3 suffix and documentation in Vishay's 1.5SMC series datasheet (Document Number: 88303). It undergoes rigorous testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life-making it approved for use in automotive electronic control units, body electronics, and ADAS subsystems. The 1.5SMC39AHM3/I also meets J-STD-020 MSL Level 1 for lead-free reflow compatibility.
What does the "HM3" suffix indicate in 1.5SMC39AHM3/I?
The "HM3" suffix in 1.5SMC39AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates halogen-free molding compound, "M3" confirms RoHS compliance and JESD201 Class 2 whisker resistance, and the "I" denotes packaging in 13-inch tape-and-reel (3500 units per reel). This distinguishes it from commercial-grade "M3" parts and automotive "HE3" variants, positioning the 1.5SMC39AHM3/I for high-reliability, environmentally compliant automotive deployments.
How does the 1.5SMC39AHM3/I compare to bidirectional TVS diodes like 1.5SMC39CHM3/I?
The 1.5SMC39AHM3/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., 33 V rail to ground), offering lower leakage and tighter VBR tolerance than its bidirectional counterpart. In contrast, 1.5SMC39CHM3/I supports AC or floating signal lines but exhibits higher reverse leakage and slightly reduced surge capability due to dual-junction architecture. For 33 V automotive power rails, the 1.5SMC39AHM3/I provides superior clamping precision and lower standby power loss compared to the bidirectional version.
What is the thermal resistance of the 1.5SMC39AHM3/I, and how does it affect layout design?
The 1.5SMC39AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pad per terminal, and RθJL = 15 °C/W to leads. These values require PCB designers to allocate sufficient copper area for heat dissipation during repetitive surge events; undersized pads increase junction temperature, accelerating parameter drift and reducing lifetime. Layouts must follow Vishay's SMC pad dimensions (0.305" × 0.220") and avoid thermal isolation to maintain the 150 °C maximum junction rating.
1.5SMC39AHM3/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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 27.8A
- 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)
1.5SMC39AHM3/I FAQ
1.How can I place an order for 1.5SMC39AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39AHM3/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 1.5SMC39AHM3/I reliable?
The price and inventory of 1.5SMC39AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39AHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC39AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39AHM3/I?
1.5SMC39AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39AHM3/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 1.5SMC39AHM3/I?
For technical support, including 1.5SMC39AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39AHM3/I requirements.
6.How does Aetrix verify that 1.5SMC39AHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39AHM3/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 1.5SMC39AHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC39AHM3/I?
All 1.5SMC39AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39AHM3/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 1.5SMC39AHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC39AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39AHM3/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 …
