My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ70AHE3/9AT
- Part No.:
- SMCJ70AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70AHE3/9AT.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,560
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ70AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) in SMC (DO-214AB) package, featuring 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and 13.3 A peak pulse current (IPPM) under 10/1000 µs waveform - designed to protect automotive-grade power rails and signal lines against ESD and load dump transients.
For engineers reviewing the SMCJ70AHE3/9AT datasheet, SMCJ70AHE3/9AT pinout, SMCJ70AHE3/9AT application, or SMCJ70AHE3/9AT equivalent, key selection criteria include AEC-Q101 qualification, low clamping voltage (VC = 113 V at IPPM), unidirectional polarity with cathode band marking, and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, responding within picoseconds to voltage surges exceeding its VWM. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at 70 V), while its low incremental surge resistance enables effective energy diversion during 10/1000 µs transients.
The SMCJ70AHE3/9AT is rated for TJ = –55 °C to +150 °C operation, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and is qualified to AEC-Q101 - confirming suitability for under-hood automotive electronics where thermal cycling and long-term reliability are critical.
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 IT = 1.0 mA - guaranteed breakdown window defining turn-on threshold consistency |
| VC @ IPPM | 113 V - clamped voltage during 13.3 A 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak transient power handling capacity under standardized surge waveform |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage ensuring minimal standby power loss and signal integrity |
| TJ max | +150 °C - junction temperature limit enabling use in high-ambient automotive environments |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-potential node; completes clamping path during overvoltage events |
| Cathode | High-side connection point | Marked with band; connects to protected line (e.g., 12 V rail); conducts surge current to ground when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring extended temperature and lifetime reliability |
| Glass passivated junction | Ensures consistent VBR tolerance and long-term stability under thermal cycling and humidity exposure |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C without preconditioning, compatible with standard SMT lines |
| 1500 W peak pulse power | Provides robust protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge events |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot during clamping, reducing risk of damage to downstream MOSFETs or microcontrollers |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping surges above 70 V. Use Value: Limits peak voltage to 113 V during 13.3 A transients, safeguarding 36 V-rated DC-DC converters and CAN transceivers. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation systems from ESD and switching noise. IC Role / Device Role / Timing Role: TVS connected across differential signal pair or single-ended output to ground. Use Value: Sub-100 ns response time prevents latch-up in precision op-amps and ADC front-ends exposed to 8 kV HBM ESD. |
| Telecom DC Power Input Protection | OBD-II Diagnostic Port Protection |
Use Scenario: Securing 48 V telecom power supplies against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary clamping device on input stage, coordinated with upstream fuses and secondary filtering. Use Value: 1500 W PPPM rating supports compliance with GR-1089-CORE Level 3 surge immunity requirements. | Use Scenario: Hardening vehicle OBD-II connector pins (pins 4, 5, 16) against accidental 24 V reverse connection and jump-start spikes. IC Role / Device Role / Timing Role: Unidirectional TVS on VBAT line (pin 16), cathode to rail, anode to chassis ground. Use Value: AEC-Q101 qualification and 150 °C operation ensure reliability in under-dash mounting locations with high ambient temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR range | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when space-constrained layouts preclude SMC and automotive qualification is unnecessary |
| 1.5SMC70A | Same SMC package and electrical specs, but no AEC-Q101 qualification; base P/N lacks HE3 suffix | RoHS-compliant but not automotive-qualified; may require additional qualification testing for automotive programs | Choose for cost-sensitive industrial designs where AEC-Q101 is not mandated |
Compared with SMAJ70A-E3/61T and 1.5SMC70A, the SMCJ70AHE3/9AT uniquely combines 1500 W surge capability, AEC-Q101 qualification, and SMC package thermal performance - making it the only option among the three validated for under-hood automotive deployment without derating.
Availability
SMCJ70AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for SMCJ70AHE3/9AT 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, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and communications infrastructure where robustness and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the SMCJ70AHE3/9AT at its rated peak pulse current?
The SMCJ70AHE3/9AT has a maximum clamping voltage (VC) 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 TJ = 25 °C with devices mounted on 8.0 mm × 8.0 mm copper pads per Vishay Document 88394, ensuring predictable overvoltage limiting for protected circuits.
Is the SMCJ70AHE3/9AT qualified for automotive applications?
Yes, the SMCJ70AHE3/9AT is AEC-Q101 qualified, as confirmed by its HE3 suffix and explicit listing in Vishay's automotive-grade ordering codes. It is rated for operation from –55 °C to +150 °C and meets MSL Level 1, making it suitable for under-hood and cabin-mounted automotive electronics such as body control modules and ADAS sensor interfaces.
What does the "HE3" suffix indicate in SMCJ70AHE3/9AT?
The "HE3" suffix in SMCJ70AHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering nomenclature, HE3 identifies the automotive-grade variant - distinct from commercial E3 (RoHS only) or HM3 (halogen-free + RoHS + AEC-Q101) versions - and confirms compliance with automotive reliability and environmental standards.
How does the SMCJ70AHE3/9AT differ from bidirectional variants like SMCJ70CA?
The SMCJ70AHE3/9AT is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse conduction must be blocked. In contrast, SMCJ70CA is bidirectional, symmetrical in both directions, and used for AC or floating signal line protection - they share VWM and PPPM ratings but differ in conduction behavior, marking, and application scope.
What is the thermal resistance of the SMCJ70AHE3/9AT, and how does it affect layout design?
The SMCJ70AHE3/9AT has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on minimum recommended pads. To maintain safe operation at full PPPM, PCB layout must provide adequate copper area (≥8.0 mm × 8.0 mm per terminal) and avoid excessive thermal isolation - especially critical in automotive applications near 150 °C ambient.
SMCJ70AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMCJ70AHE3/9AT FAQ
1.How can I place an order for SMCJ70AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70AHE3/9AT 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 SMCJ70AHE3/9AT reliable?
The price and inventory of SMCJ70AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ70AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ70AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70AHE3/9AT?
SMCJ70AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70AHE3/9AT 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 SMCJ70AHE3/9AT?
For technical support, including SMCJ70AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ70AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ70AHE3/9AT 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 SMCJ70AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ70AHE3/9AT?
All SMCJ70AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70AHE3/9AT, 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 SMCJ70AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ70AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70AHE3/9AT 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 …
