My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ70AHM3_A/I
- Part No.:
- SMCJ70AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70AHM3_A/I.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,712
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ70AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 70 V standoff voltage (VWM), 77.8–86.0 V breakdown range (VBR at 1 mA), 113 V clamping voltage (VC) at 13.3 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), commonly deployed in automotive power supply input stages.
For engineers reviewing the SMCJ70AHM3_A/I datasheet, SMCJ70AHM3_A/I pinout, SMCJ70AHM3_A/I application, or SMCJ70AHM3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), 150 °C maximum junction temperature, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates as a clamping device: under normal conditions it presents high impedance (>1 µA leakage at 70 V), but rapidly switches to low-impedance conduction when transient voltage exceeds VBR, limiting downstream voltage to ≤113 V. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The SMCJ70AHM3_A/I is rated for 1500 W peak pulse power per 10/1000 µs waveform, derates linearly above 25 °C ambient (RθJA = 75 °C/W), and supports unidirectional surge suppression only - polarity is marked by cathode band, with anode and cathode terminals defined per DO-214AB mechanical outline.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail operating margin. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during transients. |
| VC @ IPPM | 113 V at 13.3 A - Clamped voltage seen by protected circuit during full-rated 1500 W surge event. |
| PPPM | 1500 W - Peak transient energy handling capability using standardized 10/1000 µs waveform. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VIN > VBR. |
| Anode | Reference/return path | Typically tied to system ground or lower-potential rail; completes clamping current path. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental requirements and soldering standards without hazardous substances. |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 35 V), reducing stress on downstream MOSFETs or ICs. |
| Very fast response time (<1 ps) | Clamps ESD and lightning-induced transients before sensitive components experience overstress. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing without baking, simplifying manufacturing. |
| Glass passivated junction | Provides stable VBR tolerance and long-term parameter consistency across temperature and lifetime. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and jump-start surges. IC Role / Device Role / Timing Role: Primary clamping TVS placed upstream of DC-DC converter input. Use Value: Limits transient voltage to ≤113 V, preventing damage to 40 V-rated input FETs and enabling compliance with ISO 16750-2. | Use Scenario: CAN or LIN bus nodes connected to external harnesses subject to ESD (IEC 61000-4-2) and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional shunt protector on signal line referenced to local ground. Use Value: Sub-1 ns response clamps ±8 kV contact ESD events while adding <1 pF capacitance, preserving signal integrity. |
| Consumer Power Adapter Output Protection | Telecom DC Feeder Protection |
Use Scenario: 5 V/9 V/12 V USB PD or wall adapter outputs exposed to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Output-side TVS safeguarding connected devices from output overvoltage faults. Use Value: Withstands 1500 W surges and maintains <1 µA leakage at 70 V, ensuring no standby power loss or false triggering. | Use Scenario: -48 V telecom central office feeder lines subjected to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Unidirectional suppressor on positive rail relative to return, coordinated with GDT or MOV front-end. Use Value: Provides precise 113 V clamping level to protect downstream DC/DC converters rated for 120 V max input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70AHE3_A/I | Lower PPPM (400 W), smaller SMA package, same VWM/VC specs. | Not suitable for 1500 W load-dump events; limited to low-energy ESD or signal-line use. | Select when board space is constrained and surge energy is ≤400 W. |
| SMCJ70AHE3_A/I | Same electrical specs and package, but commercial-grade (E3) not AEC-Q101 qualified. | Lacks automotive reliability validation; unsuitable for under-hood or safety-critical modules. | Select for cost-sensitive industrial or consumer designs where AEC-Q101 is not mandated. |
Compared with SMCJ70AHM3_A/I, SMAJ70AHE3_A/I trades surge capacity for footprint reduction, while SMCJ70AHE3_A/I retains identical protection performance but omits automotive qualification - making SMCJ70AHM3_A/I the sole choice for production automotive systems requiring both 1500 W capability and AEC-Q101 compliance.
Availability
SMCJ70AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power feeders requiring stable component supply, AEC-Q101 traceability, and consistent 1500 W transient immunity.
Supply support for SMCJ70AHM3_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 SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What does the 'HM3' suffix mean in SMCJ70AHM3_A/I?
The HM3 suffix indicates that the SMCJ70AHM3_A/I is halogen-free, RoHS-compliant, and AEC-Q101 qualified. It denotes Vishay's highest-tier commercial/automotive hybrid qualification - meeting automotive reliability standards while adhering to environmental regulations and lead-free soldering requirements.
Is SMCJ70AHM3_A/I bidirectional or unidirectional?
SMCJ70AHM3_A/I is unidirectional. Its marking includes a cathode band, and all electrical specifications - including VBR, VWM, and VC - apply only in reverse-bias configuration. Bidirectional variants use the 'CA' suffix (e.g., SMCJ70CA), which is not applicable to the SMCJ70AHM3_A/I.
What is the maximum clamping voltage for SMCJ70AHM3_A/I at its rated peak pulse current?
The maximum clamping voltage (VC) for SMCJ70AHM3_A/I is 113 V, measured at its rated peak pulse current of 13.3 A using the standardized 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Document Number 88394, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuits during worst-case surge events.
Can SMCJ70AHM3_A/I be used in place of SMCJ70AHE3_A/I?
Yes, SMCJ70AHM3_A/I can replace SMCJ70AHE3_A/I in most designs because both share identical electrical parameters, package (SMC), and pinout. However, SMCJ70AHM3_A/I adds AEC-Q101 qualification and halogen-free construction - making it suitable for automotive applications where the HE3 version is not approved.
What PCB pad layout is required for optimal thermal performance of SMCJ70AHM3_A/I?
For optimal thermal performance, SMCJ70AHM3_A/I requires minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Vishay's datasheet. This layout ensures adequate heat dissipation to maintain junction temperature within the 150 °C limit during 1500 W surge events and supports reliable long-term operation in high-temperature environments.
SMCJ70AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 13.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ70AHM3_A/I FAQ
1.How can I place an order for SMCJ70AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70AHM3_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 SMCJ70AHM3_A/I reliable?
The price and inventory of SMCJ70AHM3_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 SMCJ70AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ70AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70AHM3_A/I?
SMCJ70AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70AHM3_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 SMCJ70AHM3_A/I?
For technical support, including SMCJ70AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70AHM3_A/I requirements.
6.How does Aetrix verify that SMCJ70AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ70AHM3_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 SMCJ70AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ70AHM3_A/I?
All SMCJ70AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70AHM3_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 SMCJ70AHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ70AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70AHM3_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 …
