My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ70AHM3_A/H
- Part No.:
- SMCJ70AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70AHM3_A/H.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,045
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ70AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 70 V standoff voltage (VWM), 77.8–86.0 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) at 10/1000 μs waveform. It clamps transients to ≤113 V at 13.3 A peak current and operates across –55 °C to +150 °C junction temperature, commonly used to protect MOSFETs and ICs in automotive power rails.
For engineers reviewing the SMCJ70AHM3_A/H datasheet, SMCJ70AHM3_A/H pinout, SMCJ70AHM3_A/H application, or SMCJ70AHM3_A/H equivalent, key selection criteria include unidirectional polarity, halogen-free RoHS-compliant construction (HM3 suffix), AEC-Q101 qualification, 1.0 μA max reverse leakage at 70 V, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
The SMCJ70AHM3_A/H employs a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low incremental surge resistance to maintain stable clamping under repetitive surges. Its thermal design supports RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to 150 °C junction temperature when mounted per recommended 8.0 mm × 8.0 mm copper pad layout.
As a member of the SMCJ series, it shares standardized SMC (DO-214AB) mechanical dimensions, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - ensures predictable turn-on threshold across production lot |
| VC @ IPPM | ≤113 V at 13.3 A - defines worst-case clamped voltage during 10/1000 μs surge |
| PPPM | 1500 W - peak transient energy absorption capability without failure |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max. | +150 °C - enables use in under-hood automotive environments and industrial power supplies |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with cathode band marking |
Pinout & Package
SMCJ70AHM3_A/H uses the SMC (DO-214AB) package: a rectangular surface-mount case with two coplanar leads, 0.220–0.246 inch (5.59–6.22 mm) wide, 0.305–0.320 inch (7.75–8.13 mm) long, and 0.079–0.126 inch (2.06–3.20 mm) height. Polarity is marked by a cathode band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node during transient suppression |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V rail); band-marked end indicates cathode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for modern vehicle and industrial assemblies |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/5a surges without degradation in automotive systems |
| Fast response time & low clamping ratio | Clamps within nanoseconds and maintains VC/VBR ≤ 1.45 - critical for protecting sensitive gate oxides |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking or special handling prior to assembly |
Applications
| Automotive Power Rail Protection | Industrial DC Motor Drive Inputs |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive transients. Use Value: Limits voltage to ≤113 V during 13.3 A surges, preventing damage to microcontrollers and CAN transceivers. |
Use Scenario: Safeguarding H-bridge driver inputs from inductive kickback during motor commutation. IC Role / Device Role / Timing Role: Standoff-rated suppressor absorbing flyback energy from 24 V DC motors. Use Value: Withstands 1500 W pulses without degradation, ensuring long-term reliability in factory automation systems. |
| Telecom Power Supply Input | Consumer Appliance Mainboard 5 V/12 V Rails |
|
Use Scenario: Shielding PoE-powered switch ports from lightning-induced surges on Ethernet lines. IC Role / Device Role / Timing Role: Primary-level TVS on secondary-side DC output before DC-DC regulation. Use Value: Low 1.0 μA leakage avoids loading regulated outputs; 75 °C/W RθJA allows compact board layout. |
Use Scenario: Guarding microcontroller I/O and power domains in washing machine mainboards. IC Role / Device Role / Timing Role: Secondary protection device downstream of fuse and primary MOV. Use Value: Halogen-free HM3 construction satisfies regional environmental mandates for white goods. |
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/H | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable only for lower-energy transients; not rated for AEC-Q101 | Select when space-constrained and surge energy < 400 W; verify thermal margin at full load. |
| SMCJ70AHE3_A/H | Same electrical specs but E3 (non-halogen-free) RoHS version; identical AEC-Q101 qualification | Acceptable where halogen-free requirement is not enforced (e.g., non-automotive industrial) | Choose for cost-sensitive designs where HM3-specific environmental compliance is unnecessary. |
Compared with SMCJ70AHM3_A/H, SMAJ70AHE3_A/H offers smaller size but reduced surge capacity and no automotive qualification, while SMCJ70AHE3_A/H matches performance and qualification but lacks halogen-free assurance required in Tier 1 automotive supply chains.
Availability
SMCJ70AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial motor drives, telecom power supplies, and consumer appliance designs requiring stable component supply with guaranteed AEC-Q101 compliance and halogen-free materials.
Supply support for SMCJ70AHM3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series was developed to deliver high-power transient suppression in automotive and industrial environments, combining robust surge handling, AEC-Q101 validation, and standardized SMC packaging for seamless integration into high-volume SMT lines.
FAQ
What is the clamping voltage of the SMCJ70AHM3_A/H under maximum rated surge current?
The SMCJ70AHM3_A/H has a maximum clamping voltage (VC) of 113 V when subjected to its peak pulse current (IPPM) of 13.3 A using the standard 10/1000 μs waveform. This value is measured at TA = 25 °C with specified mounting conditions (0.31" × 0.31" copper pads), and represents the upper limit of voltage seen by downstream components during worst-case transient events. The SMCJ70AHM3_A/H maintains this clamping performance across its qualified temperature range.
Is the SMCJ70AHM3_A/H suitable for automotive applications?
Yes, the SMCJ70AHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - both mandatory for automotive electronics in Tier 1 supply chains. Its 1500 W surge rating, 150 °C maximum junction temperature, and MSL Level 1 reflow compatibility make it appropriate for engine control modules, body control units, and infotainment power rails. The SMCJ70AHM3_A/H is explicitly listed in Vishay's AEC-Q101 qualified product documentation.
How does the HM3 suffix differ from the HE3 suffix in the SMCJ70A family?
The HM3 suffix on SMCJ70AHM3_A/H denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, whereas HE3 indicates RoHS-compliant and AEC-Q101-qualified but not halogen-free. Both share identical electrical specifications and qualification status, but HM3 meets stricter environmental mandates (e.g., EU ELV, OEM halogen bans). For designs targeting global automotive programs, the SMCJ70AHM3_A/H is required where halogen content restrictions apply.
What is the reverse leakage current specification for the SMCJ70AHM3_A/H at its standoff voltage?
The SMCJ70AHM3_A/H specifies a maximum reverse leakage current (ID) of 1.0 μA at its rated standoff voltage (VWM) of 70 V and TA = 25 °C. This ultra-low leakage ensures minimal power loss and signal distortion in high-impedance monitoring circuits or battery-backed systems. Leakage remains within specification up to +125 °C, supporting reliable operation in under-dash automotive environments where the SMCJ70AHM3_A/H is commonly deployed.
Can the SMCJ70AHM3_A/H be used in bidirectional configurations?
No, the SMCJ70AHM3_A/H is a unidirectional TVS diode, indicated by the "A" (not "CA") suffix and cathode band marking. Bidirectional operation requires the CA variant (e.g., SMCJ70CA), which has symmetrical breakdown in both polarities. Using the SMCJ70AHM3_A/H in reverse-biased configurations will result in forward conduction above ~0.7 V, defeating its intended protection function. Always match the SMCJ70AHM3_A/H polarity to the protected line's expected transient direction.
SMCJ70AHM3_A/H 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/H FAQ
1.How can I place an order for SMCJ70AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70AHM3_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 SMCJ70AHM3_A/H reliable?
The price and inventory of SMCJ70AHM3_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 SMCJ70AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ70AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70AHM3_A/H?
SMCJ70AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70AHM3_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 SMCJ70AHM3_A/H?
For technical support, including SMCJ70AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ70AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ70AHM3_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 SMCJ70AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ70AHM3_A/H?
All SMCJ70AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70AHM3_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 SMCJ70AHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ70AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70AHM3_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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
