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Vishay General Semiconductor - Diodes Division SMCJ70AHE3_A/H
- Part No.:
- SMCJ70AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70AHE3_A/H.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,052
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Product details
Overview
SMCJ70AHE3_A/H 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 sensitive electronics. It features a 70 V standoff voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 13.3 A peak pulse current (IPPM), and clamps to ≤113 V at rated surge. It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines in automotive power systems.
For engineers reviewing the SMCJ70AHE3_A/H datasheet, SMCJ70AHE3_A/H pinout, SMCJ70AHE3_A/H application, or SMCJ70AHE3_A/H equivalent, key selection criteria include unidirectional polarity, 1500 W surge rating, 70 V working voltage, AEC-Q101 qualification, and SMC package compatibility with automated placement and high-reliability automotive PCB layouts.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM (70 V) and rapidly transitions to low-impedance conduction above VBR (min 77.8 V) to limit transient voltages. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM), while its low incremental surge resistance enables effective energy diversion during fast transients such as load dump or inductive switching spikes.
The device is rated for 150 °C maximum junction temperature and exhibits a positive temperature coefficient of VBR (+0.105 %/°C), ensuring predictable voltage shift under thermal stress. Its MSL Level 1 rating (260 °C peak reflow) and matte tin-plated leads support lead-free assembly without solderability degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Confirmed breakdown range defining turn-on threshold |
| VC @ IPPM | ≤113 V at 13.3 A - Clamped voltage during full 1500 W surge, limiting downstream stress |
| PPPM | 1500 W (10/1000 µs) - Surge energy handling capacity per industry-standard waveform |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity and system quiescent current |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; cathode indicated by band on body; compatible with J-STD-002/JESD 22-B102 soldering standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side reference | Completes clamping path when transient exceeds VBR; must be routed with low-inductance trace to ground plane |
| Cathode | Current exit point in forward bias; marked by band; connected to line being protected | Receives transient energy from I/O or power rail; polarity-critical-reverse connection disables protection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, HTRB, and mechanical shock per JEDEC standards |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge events |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping precision |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow without popcorn or delamination risk |
| UL 94 V-0 molding compound | Provides flame-retardant housing required for automotive and industrial safety compliance |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power rail and ground. Use Value: Limits voltage to ≤113 V during 1500 W surges, preventing damage to MCU power inputs and PMICs. | Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) transient suppressor on signal path to ADC input. Use Value: Sub-µA leakage preserves sensor offset accuracy; fast response (<1 ns) prevents ADC saturation. |
| DC Motor Drive Circuits | On-Board Charger (OBC) Control Logic |
Use Scenario: Suppressing inductive kickback from brushed DC motor commutation in seat/mirror actuators. IC Role / Device Role / Timing Role: Snubber-style TVS across motor terminals or H-bridge FET drains. Use Value: Absorbs 13.3 A peak surge without degradation, enabling reliable 100,000+ cycle actuator life. | Use Scenario: Guarding isolated gate drivers and microcontroller GPIOs in 200–400 V OBC auxiliary supplies. IC Role / Device Role / Timing Role: Secondary-level protection after primary MOV/fuse stage, before digital control ICs. Use Value: Tight VBR tolerance (±5.2%) ensures consistent trip point across temperature, avoiding false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70AHE3_A/H | Lower PPPM (600 W), same VWM/VBR, SMB (DO-214AA) package (smaller footprint, lower thermal mass) | Suitable for space-constrained consumer or non-automotive industrial boards with lower surge exposure | Select when board area is critical and surge threat level is ≤600 W; not AEC-Q101 qualified unless specified |
| SMCJ70CAHE3_A/H | Bidirectional variant; identical VWM/VBR/PPPM but symmetrical clamping in both polarities | Required for AC-coupled or differential signal lines where polarity reversal occurs (e.g., CAN bus, RS-485) | Choose only if bidirectional protection is needed; unidirectional SMCJ70AHE3_A/H offers better leakage and lower cost for DC rails |
Compared with SMBJ70AHE3_A/H and SMCJ70CAHE3_A/H, the SMCJ70AHE3_A/H delivers higher surge robustness (1500 W vs. 600 W) and automotive qualification, making it optimal for under-hood 12 V systems where reliability and energy handling outweigh size constraints.
Availability
SMCJ70AHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, DC motor drive, and on-board charger control applications requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for SMCJ70AHE3_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, TVS devices, and optoelectronics with emphasis on reliability and performance.
The SMCJ series is engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom-where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of the SMCJ70AHE3_A/H under full-rated surge conditions?
The SMCJ70AHE3_A/H clamps to a maximum of 113 V when subjected to its rated 13.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during a 1500 W transient event. The SMCJ70AHE3_A/H maintains this clamping performance across its operational temperature range and after repeated surge exposures due to its glass-passivated junction.
Is the SMCJ70AHE3_A/H suitable for automotive under-hood applications?
Yes, the SMCJ70AHE3_A/H is AEC-Q101 qualified and rated for junction temperatures up to +150 °C, making it suitable for under-hood automotive applications such as engine control units, body control modules, and lighting drivers. Its SMC package provides robust thermal dissipation, and its MSL Level 1 rating ensures compatibility with lead-free reflow processes used in automotive manufacturing. The SMCJ70AHE3_A/H also meets UL 94 V-0 flammability requirements for safety-critical assemblies.
How does the SMCJ70AHE3_A/H differ from the bidirectional SMCJ70CAHE3_A/H?
The SMCJ70AHE3_A/H is unidirectional, with a defined cathode band and optimized for DC rail protection where polarity is fixed. In contrast, the SMCJ70CAHE3_A/H is bidirectional, offering symmetrical clamping in both directions and no polarity marking-required for AC or differential signals like CAN or RS-485. Both share identical VWM (70 V), VBR (77.8–86.0 V), PPPM (1500 W), and package, but the SMCJ70AHE3_A/H exhibits lower reverse leakage (<1.0 µA vs. ≤2.0 µA for CA version).
What is the thermal resistance of the SMCJ70AHE3_A/H, and how does it affect power derating?
The SMCJ70AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" copper pads. This value determines how much the device's power dissipation must be reduced as ambient temperature rises above 25 °C. For example, at TA = 85 °C, the maximum allowable continuous power drops to ~3.9 W (from 6.5 W at 25 °C), per the derating curve in Figure 2 of the Vishay datasheet 88394. The SMCJ70AHE3_A/H relies on PCB copper area-not heatsinks-for thermal management.
Can the SMCJ70AHE3_A/H replace older SMCJ70A variants without layout changes?
Yes, the SMCJ70AHE3_A/H uses the same SMC (DO-214AB) package, pinout, and mechanical dimensions as legacy SMCJ70A parts, enabling drop-in replacement on existing PCBs. Its "HE3" suffix denotes RoHS-compliant and AEC-Q101-qualified construction, while maintaining identical electrical characteristics-including VWM (70 V), VBR (77.8–86.0 V), and PPPM (1500 W). No layout or schematic modifications are required when upgrading to SMCJ70AHE3_A/H from non-qualified SMCJ70A versions.
SMCJ70AHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ70AHE3_A/H FAQ
1.How can I place an order for SMCJ70AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70AHE3_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 SMCJ70AHE3_A/H reliable?
The price and inventory of SMCJ70AHE3_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 SMCJ70AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ70AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70AHE3_A/H?
SMCJ70AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70AHE3_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 SMCJ70AHE3_A/H?
For technical support, including SMCJ70AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ70AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ70AHE3_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 SMCJ70AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ70AHE3_A/H?
All SMCJ70AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70AHE3_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 SMCJ70AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ70AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70AHE3_A/H Tags
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