My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC39AHE3_A/I
- Part No.:
- 1.5SMC39AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39AHE3_A/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,883
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC39AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 39 V breakdown voltage (VBR = 37.1–41.0 V at 1 mA), 33.3 V stand-off voltage (VWM), clamps to ≤53.9 V at 27.8 A peak pulse current, and delivers 1500 W peak pulse power with 10/1000 µs waveform - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5SMC39AHE3_A/I datasheet, 1.5SMC39AHE3_A/I pinout, 1.5SMC39AHE3_A/I application, or 1.5SMC39AHE3_A/I equivalent, this device is selected for high-reliability unidirectional surge suppression where AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.38), and SMC (DO-214AB) surface-mount compatibility are required.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 33.3 V), then rapidly avalanches below 1 ns to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low dynamic resistance (typical ZPP < 1.9 Ω), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
Rated for -65 °C to +150 °C junction temperature, it supports automotive-grade reliability with MSL Level 1 moisture sensitivity and JESD201 Class 2 whisker resistance. The unidirectional polarity (cathode-banded) allows integration into DC-biased circuits without reverse conduction during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - defines precise avalanche initiation threshold for repeatable clamping behavior |
| VWM | 33.3 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | ≤53.9 V at 27.8 A - clamping voltage under 1500 W 10/1000 µs surge, limiting stress on protected circuitry |
| PPPM | 1500 W - peak pulse power handling capability per standard 10/1000 µs waveform, duty cycle ≤0.01 % |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine), supporting high-energy fault events |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-power industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal relief |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, footprint compatible with IPC-7351B SMC_STD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-side reference in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal | Banded end; connects to protected line - conducts surge current to anode when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/5a transients and IEC 61000-4-5 Level 4 surges without degradation |
| 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 interfaces |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free assembly without popcorn cracking or delamination |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage performance across temperature and lifetime |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges above 33.3 V. Use Value: Limits peak voltage to ≤53.9 V during 1500 W transients, preventing damage to LDOs, microcontrollers, and CAN transceivers. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital sensor interfaces (I²C, SPI) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) unidirectional clamp on signal-to-ground path, responding in <1 ns. Use Value: Maintains signal integrity while suppressing ±8 kV contact ESD (IEC 61000-4-2) without loading the signal line. |
| Telecom DC Power Feeds | Consumer Power Adapter Output Stage |
Use Scenario: Secondary-side surge protection on -48 V telecom power distribution boards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: High-energy unidirectional TVS connected between -48 V rail and return, leveraging 200 A IFSM rating. Use Value: Absorbs multi-kA induced surges without failure, meeting GR-1089-CORE Level 3 immunity requirements. |
Use Scenario: Output overvoltage clamp in USB PD and AC/DC adapters to prevent hazardous voltage delivery to connected devices. IC Role / Device Role / Timing Role: Final-stage fail-safe shunt element activated only during regulator fault or feedback loop loss. Use Value: Clamps output to safe level (<54 V) before secondary-side capacitors rupture or USB-C port ICs sustain permanent damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A-E3/52 | Lower PPPM (600 W), smaller SMB package, VWM = 36 V, VC = 58.1 V @ 10.3 A | Not AEC-Q101 qualified; suitable for commercial-grade consumer power supplies only | Select when board space is constrained and surge energy is ≤600 W |
| 1.5KE39A | Through-hole DO-201 package, same VBR/VWM, but higher VC (60 V), lower thermal performance (RθJA ≈ 100 °C/W) | Lacks SMT automation compatibility and automotive qualification; used in legacy industrial designs | Select only for through-hole prototyping or repair of existing DO-201-based assemblies |
Compared with SMBJ36A-E3/52 and 1.5KE39A, the 1.5SMC39AHE3_A/I provides superior surge handling (1500 W vs. 600 W or ~1000 W), AEC-Q101 qualification for automotive use, and optimized thermal dissipation in SMC package - making it the preferred choice for new high-reliability surface-mount designs requiring full ISO 7637-2 compliance.
Availability
1.5SMC39AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, telecom power systems, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC39AHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom applications where AEC-Q101 qualification, low clamping voltage, and robust surge endurance are mandatory design requirements.
FAQ
What is the breakdown voltage tolerance for 1.5SMC39AHE3_A/I?
The 1.5SMC39AHE3_A/I has a specified breakdown voltage range of 37.1 V to 41.0 V at 1 mA test current, representing a ±5.4% tolerance about the nominal 39 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports reliable system-level surge margin calculations in designs using 1.5SMC39AHE3_A/I.
Is 1.5SMC39AHE3_A/I RoHS-compliant and halogen-free?
Yes, the 1.5SMC39AHE3_A/I carries the HE3 suffix, indicating it is RoHS-compliant per EU Directive 2011/65/EU and meets Vishay's commercial-grade material specifications. However, it is not halogen-free - that designation applies only to HM3-suffixed variants. The HE3 version uses standard brominated flame-retardant molding compound compliant with UL 94 V-0.
What is the maximum clamping voltage of 1.5SMC39AHE3_A/I under surge conditions?
The maximum clamping voltage (VC) of 1.5SMC39AHE3_A/I is 53.9 V when subjected to its rated peak pulse current of 27.8 A (10/1000 µs waveform). This value is guaranteed across the full operating temperature range (-65 °C to +150 °C) and defines the upper voltage limit imposed on protected circuitry during transient events.
Can 1.5SMC39AHE3_A/I be used in bidirectional configurations?
No, 1.5SMC39AHE3_A/I is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires a part with "CA" suffix (e.g., 1.5SMC39CA). Using 1.5SMC39AHE3_A/I in reverse-biased AC applications would result in forward conduction and potential failure - always verify polarity alignment in PCB layout for 1.5SMC39AHE3_A/I.
What does the "_A/I" suffix mean in 1.5SMC39AHE3_A/I?
The "_A/I" suffix in 1.5SMC39AHE3_A/I denotes two attributes: "A" indicates AEC-Q101 qualification per revision A test plan, and "I" specifies packaging in 13-inch diameter tape-and-reel format with 3500 units per reel. This distinguishes it from "_A/H" (7-inch reel, 850 units) and confirms its suitability for automotive production lines requiring certified components.
1.5SMC39AHE3_A/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:
- Active
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC39AHE3_A/I FAQ
1.How can I place an order for 1.5SMC39AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39AHE3_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 1.5SMC39AHE3_A/I reliable?
The price and inventory of 1.5SMC39AHE3_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 1.5SMC39AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC39AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39AHE3_A/I?
1.5SMC39AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39AHE3_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 1.5SMC39AHE3_A/I?
For technical support, including 1.5SMC39AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC39AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39AHE3_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 1.5SMC39AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC39AHE3_A/I?
All 1.5SMC39AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39AHE3_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 1.5SMC39AHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC39AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39AHE3_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
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 …
