My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ85CAHE3_A/H
- Part No.:
- SMCJ85CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ85CAHE3_A/H.pdf
- Description:
- TVS DIODE 85VWM 137VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,937
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ85CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 85 V standoff voltage (VWM), 137 V maximum clamping voltage (VC) at 10.9 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMCJ85CAHE3_A/H datasheet, SMCJ85CAHE3_A/H pinout, SMCJ85CAHE3_A/H application, or SMCJ85CAHE3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, 1500 W surge capability, low thermal resistance (RθJL = 15 °C/W), and RoHS-compliant matte tin terminations suitable for automated SMT assembly.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at VWM), but triggers into low-impedance conduction when transient voltage exceeds its breakdown range (94.4–104 V at 1 mA). Its glass-passivated junction ensures stable avalanche characteristics and fast response (<1 ns).
Designed for bidirectional transients, SMCJ85CAHE3_A/H delivers symmetrical clamping in both polarities without polarity marking - critical for AC-coupled interfaces and floating bus lines. Thermal performance is optimized via low RθJL (15 °C/W) and compatibility with standard 8.0 mm × 8.0 mm copper pads per terminal per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 94.4 V / 104 V at 1 mA - guaranteed avalanche initiation window for reliable turn-on margin |
| VC @ IPPM | 137 V at 10.9 A - clamping voltage limiting downstream component stress during 10/1000 μs surge |
| PPPM | 1500 W - peak transient energy absorption capacity per single event |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance enabling efficient heat transfer to PCB copper |
| TJ max | +150 °C - maximum junction temperature supporting operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical cathode/anode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients - enables dual-polarity clamping |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode; no functional distinction - terminals are interchangeable in layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for polarity-aware placement in AC or floating systems |
| AEC-Q101 qualification | Validated for automotive under-hood use - includes HTOL, TC, and ESD testing per stress test plan |
| Glass-passivated junction | Stable, repeatable avalanche behavior across temperature and lifetime - reduces parameter drift vs. epoxy-passivated alternatives |
| Low RθJL (15 °C/W) | Enables higher surge duty cycles without thermal runaway - supports repeated 1500 W pulses with adequate PCB copper area |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH - compatible with standard SMT reflow without dry-pack requirements |
Applications
| Automotive Power Distribution | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed microcontroller inputs and CAN transceiver power pins against load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS placed directly at IC power entry point to clamp transients before they reach LDOs or logic circuits. Use Value: Withstands 1500 W surges while limiting clamping voltage to 137 V - prevents latch-up or gate oxide damage in downstream ASICs. | Use Scenario: Safeguarding isolated gate driver bias supplies and feedback signal paths in variable-frequency drives exposed to IGBT switching noise. IC Role / Device Role / Timing Role: Bidirectional clamping element across floating DC-link sensing nodes and optocoupler supply rails. Use Value: Symmetrical 94.4–104 V breakdown ensures equal protection for positive/negative transients induced by fast dV/dt switching edges. |
| Telecom Line Interface | Consumer Appliance Power Supply |
Use Scenario: Shielding Ethernet PHY power and data lines from ESD and lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Primary-level TVS on PoE injector secondary side and RJ45 magnetics common-mode choke outputs. Use Value: 137 V clamping voltage preserves margin below 150 V isolation barrier ratings - maintains safety compliance per IEC 61000-4-5. | Use Scenario: Securing microcontroller reset lines and relay coil suppression circuits in washing machine control boards subjected to inductive kickback. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA at 85 V) shunt protector placed across MCU VDD-GND and relay flyback diode anodes. Use Value: 1 μA max ID at VWM minimizes standby current drain - critical for battery-backed real-time clocks and low-power sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CAHE3_A/H | Lower PPPM (600 W), same VWM/VC, SMB package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump | Select only when board space is constrained and surge energy is ≤600 W |
| SMCJ85CAHM3_A/H | Halogen-free variant; identical electrical specs and AEC-Q101 qualification | No functional difference - used where halogen-free compliance is mandated (e.g., EU public transport) | Drop-in replacement when RoHS + halogen-free material declaration is required |
Compared with SMBJ85CAHE3_A/H and SMCJ85CAHM3_A/H, the SMCJ85CAHE3_A/H offers optimal balance of 1500 W surge handling, automotive qualification, and standard RoHS compliance - making it the default choice for high-reliability 12 V/24 V system protection where space permits SMC footprint.
Availability
SMCJ85CAHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drives, telecom infrastructure equipment, and consumer appliance power systems requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ85CAHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom applications where sustained surge immunity and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage range for SMCJ85CAHE3_A/H?
The SMCJ85CAHE3_A/H has a guaranteed breakdown voltage (VBR) range of 94.4 V to 104 V at 1 mA test current, measured in both directions due to its bidirectional construction. This tight tolerance ensures consistent clamping onset across production lots and temperature extremes, supporting robust design margins in automotive and industrial applications.
Is SMCJ85CAHE3_A/H suitable for automotive applications?
Yes, SMCJ85CAHE3_A/H is AEC-Q101 qualified and specifically rated for automotive use - validated for temperature cycling, high-temperature reverse bias, and ESD robustness. Its 1500 W peak pulse power and 137 V clamping voltage meet ISO 7637-2 Pulse 5a requirements for 12 V systems, making it appropriate for ECU, body control module, and ADAS power rail protection.
Does SMCJ85CAHE3_A/H have polarity markings?
No, SMCJ85CAHE3_A/H is a bidirectional TVS diode and carries no polarity marking on the SMC (DO-214AB) package. Both terminals are functionally identical - the device clamps symmetrically for positive and negative transients, allowing unrestricted orientation during automated placement.
What is the maximum clamping voltage of SMCJ85CAHE3_A/H at rated surge current?
The maximum clamping voltage (VC) of SMCJ85CAHE3_A/H is 137 V at 10.9 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value represents the worst-case voltage seen by protected circuitry during full-rated surge events - critical for verifying safe operating margins of downstream ICs and passives.
How does the thermal resistance of SMCJ85CAHE3_A/H impact PCB layout?
With a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, SMCJ85CAHE3_A/H requires adequate copper area on both terminals - Vishay specifies minimum 8.0 mm × 8.0 mm pads per lead. This ensures effective heat dissipation during repetitive surges and prevents thermal runaway, especially in high-ambient environments like engine compartments.
SMCJ85CAHE3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 10.9A
- 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)
SMCJ85CAHE3_A/H FAQ
1.How can I place an order for SMCJ85CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ85CAHE3_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 SMCJ85CAHE3_A/H reliable?
The price and inventory of SMCJ85CAHE3_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 SMCJ85CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ85CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ85CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ85CAHE3_A/H?
SMCJ85CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ85CAHE3_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 SMCJ85CAHE3_A/H?
For technical support, including SMCJ85CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ85CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ85CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ85CAHE3_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 SMCJ85CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ85CAHE3_A/H?
All SMCJ85CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ85CAHE3_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 SMCJ85CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ85CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ85CAHE3_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…
