My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC400AHM3_B/I
- Part No.:
- 1.5SMC400AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC400AHM3_B/I.pdf
- Description:
- TVS DIODE 342VWM 548VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,246
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC400AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 400 V standoff voltage (VWM), 459 V maximum breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 µs). It provides robust ESD and surge protection for high-voltage DC rails in automotive power systems and industrial motor drives.
For engineers reviewing the 1.5SMC400AHM3_B/I datasheet, 1.5SMC400AHM3_B/I pinout, 1.5SMC400AHM3_B/I application, or 1.5SMC400AHM3_B/I equivalent, key selection criteria include clamping voltage (548 V at IPPM), AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), thermal resistance (RθJA = 75 °C/W), and unidirectional polarity with cathode band marking.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 342 V), then rapidly avalanches below 459 V to clamp transients. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for 10/1000 µs waveform compliance, it delivers 2.7 A peak pulse current (IPPM) at 548 V clamping, with derating above 25 °C per Fig. 2 and MSL Level 1 moisture sensitivity. The SMC package supports automated placement and meets UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 342 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (Breakdown) | 380–420 V at 1 mA - Confirmed avalanche initiation range for reliable triggering |
| VC (Clamping) | 548 V at IPPM - Peak voltage seen by protected circuit during 1500 W transient |
| PPPM | 1500 W - Surge energy handling capability per 10/1000 µs standard waveform |
| ID (Leakage) | 1.0 µA max at VWM - Minimal power loss and signal interference in standby state |
| TJ max | +150 °C - Enables operation in under-hood automotive and high-temperature industrial environments |
| RθJA | 75 °C/W - Thermal performance baseline for PCB copper pad layout (8.0 mm × 8.0 mm per terminal) |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads; cathode indicated by band on one end; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point in reverse-biased protection configuration | Connected to protected line (e.g., +400 V rail); conducts when transient exceeds VBR |
| Anode (unmarked end) | Reference/ground return path | Must be tied to system ground or low-impedance return; completes clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern automotive and industrial manufacturing |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes overvoltage stress on downstream MOSFETs or controllers during clamping event |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning |
Applications
| Automotive Power Supply Protection | Industrial DC Link Surge Suppression |
|---|---|
Use Scenario: Protecting 400 V battery management system (BMS) input against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between HV+ rail and chassis ground. Use Value: Clamps 1500 W transients to ≤548 V, preventing damage to isolated DC/DC converters and monitoring ICs. |
Use Scenario: Safeguarding IGBT gate drivers and bus voltage sensors in 400 V motor drive inverters. IC Role / Device Role / Timing Role: High-VWM TVS across DC link capacitors to absorb switching-induced voltage spikes. Use Value: Fast response (<1 ns) and low Rsurge limit voltage overshoot during fast dV/dt events. |
| Telecom Rectifier Output Protection | Renewable Energy String Monitoring |
Use Scenario: Securing output of 400 V telecom rectifiers against lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on rectified DC output prior to distribution bus. Use Value: 548 V clamping ensures downstream DC-DC modules remain within absolute maximum ratings. |
Use Scenario: Protecting string voltage monitors in solar PV combiner boxes exposed to induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on measurement inputs referenced to floating 400 V string potential. Use Value: 342 V VWM enables safe operation under nominal string voltage while blocking false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ400A-E3/57T | Same 400 V VWM, but lower PPPM (400 W), SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select only if space-constrained and surge threat level is <500 W |
| 1.5KE400A | Through-hole DO-201 package, identical electrical specs, no AEC-Q101 or halogen-free certification | Not qualified for automotive production; requires wave solder or hand-solder process | Choose for prototyping or non-automotive industrial use where board assembly method differs |
Compared with 1.5SMC400AHM3_B/I, SMAJ400A-E3/57T offers smaller size but sacrifices 73% surge capacity and automotive qualification, while 1.5KE400A retains full electrical performance but lacks surface-mount compatibility and AEC-Q101 validation required for OEM automotive programs.
Availability
1.5SMC400AHM3_B/I is available at Aetrix Electronics and suitable for automotive power systems, industrial motor drives, telecom rectifiers, and renewable energy monitoring requiring stable component supply with guaranteed AEC-Q101 compliance and halogen-free materials.
Supply support for 1.5SMC400AHM3_B/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 and application-specific performance.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments-specifically targeting automotive, industrial, and telecom applications demanding AEC-Q101 qualification and robust 1500 W surge handling.
FAQ
What is the clamping voltage of the 1.5SMC400AHM3_B/I under maximum surge conditions?
The 1.5SMC400AHM3_B/I has a maximum clamping voltage (VC) of 548 V when subjected to its rated 1500 W peak pulse power with a 10/1000 µs waveform. This value is measured at the specified peak pulse current (IPPM = 2.7 A) and defines the upper voltage limit imposed on the protected circuit during transient events.
Is the 1.5SMC400AHM3_B/I qualified for automotive applications?
Yes, the 1.5SMC400AHM3_B/I carries the HM3 suffix, indicating it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. This certification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making it suitable for under-hood and powertrain applications per automotive OEM requirements.
What does the "B" in 1.5SMC400AHM3_B/I signify?
The "B" in 1.5SMC400AHM3_B/I denotes the revision level for AEC-Q101 qualified devices in the 250 V to 540 V range. Per Vishay documentation, _B suffix applies specifically to 1.5SMC250A through 1.5SMC540A variants and confirms compliance with the latest AEC-Q101 test requirements at time of manufacture.
How does the 1.5SMC400AHM3_B/I differ from the non-HM3 version?
The 1.5SMC400AHM3_B/I differs from standard 1.5SMC400A variants by incorporating halogen-free molding compound and full AEC-Q101 qualification. Electrically identical, it adds automotive-grade reliability assurance and environmental compliance-critical for Tier 1 suppliers and OEM production releases.
What is the thermal resistance and recommended PCB layout for the 1.5SMC400AHM3_B/I?
The 1.5SMC400AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To achieve this rating, use minimum recommended pad layout per Vishay Doc. 88303, avoid thermal reliefs on pads, and ensure adequate copper area for heat dissipation in high-duty-cycle surge environments.
1.5SMC400AHM3_B/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):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 2.7A
- 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)
1.5SMC400AHM3_B/I FAQ
1.How can I place an order for 1.5SMC400AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC400AHM3_B/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 1.5SMC400AHM3_B/I reliable?
The price and inventory of 1.5SMC400AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC400AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC400AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC400AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC400AHM3_B/I?
1.5SMC400AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC400AHM3_B/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 1.5SMC400AHM3_B/I?
For technical support, including 1.5SMC400AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC400AHM3_B/I requirements.
6.How does Aetrix verify that 1.5SMC400AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC400AHM3_B/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 1.5SMC400AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC400AHM3_B/I?
All 1.5SMC400AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC400AHM3_B/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 1.5SMC400AHM3_B/I part is unused and in its original packaging.
Return procedure for 1.5SMC400AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC400AHM3_B/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 …
