My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ85AHM3/H
- Part No.:
- SMCJ85AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ85AHM3/H.pdf
- Description:
- TVS DIODE 85VWM 137VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,106
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ85AHM3/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 85 V standoff voltage (VWM), 137 V clamping voltage (VC) at 10.9 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power rails.
For engineers reviewing the SMCJ85AHM3/H datasheet, SMCJ85AHM3/H pinout, SMCJ85AHM3/H application, or SMCJ85AHM3/H equivalent, this device is selected for robust 1500 W transient suppression in 10/1000 μs waveforms, halogen-free RoHS compliance (HM3 suffix), and AEC-Q101 qualification - critical for automotive ECU and battery management system designs requiring long-term reliability under repetitive surge stress.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 85 V reverse standoff voltage (VWM) and rapidly transitions to low-impedance conduction when transients exceed its 94.4–104 V breakdown voltage (VBR) range at 1 mA test current. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns).
Thermally, it features a junction-to-lead thermal resistance of 15 °C/W and supports continuous operation up to +150 °C junction temperature. The SMC package enables automated placement and meets UL 94 V-0 flammability rating with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
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 breakdown threshold defining turn-on window |
| VC @ IPPM | 137 V at 10.9 A - clamped voltage during full 1500 W surge, limiting downstream stress |
| PPPM | 1500 W - peak power dissipation capability for 10/1000 μs waveform per JEDEC standards |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - extended thermal rating enabling use in under-hood automotive environments |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint |
Pinout & Package
SMCJ85AHM3/H uses the standard SMC (DO-214AB) package: a 2-terminal surface-mount device with cathode indicated by a band on the body. Terminals are matte tin-plated for solderability per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink | Connected to protected line; conducts transient energy to ground during overvoltage events |
| Anode | Reference node | Typically tied to system ground or low-impedance return path to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power domains |
| Halogen-free & RoHS-compliant (HM3) | Meets IEC 61249-2-21 and JEDEC J-STD-20 reflow profiles without hazardous substance risk |
| Low incremental surge resistance | Enables tighter clamping (137 V at 10.9 A) versus higher-resistance alternatives, reducing voltage overshoot |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without moisture-induced popcorning or delamination |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability across temperature and life cycles |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply inputs in engine control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Clamping transient energy above 85 V to limit voltage seen by downstream DC-DC converters and microcontrollers. Use Value: Withstands 1500 W surges and maintains <1.0 μA leakage at 85 V, preserving low-power sleep modes while surviving repeated 10/1000 μs transients. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules from ESD and switching noise. IC Role / Device Role / Timing Role: Fast-response shunt element placed directly at connector entry point to divert sub-100 ns ESD events before reaching precision amplifiers. Use Value: 137 V clamping voltage ensures signal chain components remain within absolute maximum ratings even during 8 kV contact ESD events. |
| Telecom DC Power Feeds | Consumer Device USB/Power Input Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on midspan or endpoint PSE/PD interfaces, coordinated with upstream fusing. Use Value: 1500 W PPPM rating handles combined lightning-induced surges and inductive kickback without degradation over >1000 events. | Use Scenario: Protecting lithium-ion battery charging circuits in portable medical devices from adapter fault transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input capacitor and charge controller IC to absorb 10/1000 μs surges up to 1500 W. Use Value: Halogen-free HM3 construction complies with IEC 62368-1 and avoids toxic off-gassing during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ85AHE3/A | Lower PPPM (400 W), same VWM (85 V), SMA package (smaller footprint, lower thermal mass) | Suitable for space-constrained consumer electronics but not automotive-grade surge requirements | Select when board area is critical and surge energy is ≤400 W |
| SMCJ85A-M3/57T | Same electrical specs and SMC package, but commercial-grade (non-AEC-Q101) and RoHS-compliant M3 suffix only | Acceptable for industrial controls where automotive qualification is not mandated | Select when AEC-Q101 is not required and cost optimization is prioritized |
Compared with SMCJ85AHM3/H, SMAJ85AHE3/A offers reduced surge handling in a smaller package, while SMCJ85A-M3/57T provides identical protection without automotive qualification - making SMCJ85AHM3/H the sole choice when AEC-Q101 compliance, halogen-free materials, and full 1500 W capability are mandatory.
Availability
SMCJ85AHM3/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power feeds, and medical device battery inputs requiring stable component supply across multi-year production cycles.
Supply support for SMCJ85AHM3/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 validation.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of SMCJ85AHM3/H at its rated peak pulse current?
The SMCJ85AHM3/H has a maximum clamping voltage (VC) of 137 V when subjected to its rated peak pulse current (IPPM) of 10.9 A under a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that downstream circuitry will not experience voltages exceeding 137 V during specified surge events, making SMCJ85AHM3/H suitable for protecting 85 V-rated systems with safety margin.
Is SMCJ85AHM3/H qualified for automotive applications?
Yes, SMCJ85AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure (HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified variants). This qualification covers stress tests including temperature cycling, humidity bias, and surge endurance - validating SMCJ85AHM3/H for use in engine control units, body electronics, and ADAS power domains where reliability under thermal and electrical stress is critical.
What does the "HM3" suffix mean in SMCJ85AHM3/H?
The "HM3" suffix in SMCJ85AHM3/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering documentation, HM3 parts meet JESD201 Class 2 whisker resistance, UL 94 V-0 flammability, and JEDEC MSL Level 1 (260 °C peak reflow), distinguishing them from commercial-grade M3 or HE3 variants and confirming suitability for automotive and high-reliability industrial deployments.
Can SMCJ85AHM3/H be used in bidirectional configurations?
No, SMCJ85AHM3/H is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix and presence of cathode band marking. Bidirectional operation requires the "CA" variant (e.g., SMCJ85CA), which lacks polarity marking and exhibits symmetrical clamping in both directions. Using SMCJ85AHM3/H in bidirectional circuits would result in forward conduction during negative transients, potentially damaging the device or failing to protect.
What is the thermal resistance from junction to ambient for SMCJ85AHM3/H?
The typical junction-to-ambient thermal resistance (RθJA) of SMCJ85AHM3/H is 75 °C/W when mounted on the minimum recommended pad layout (0.31" × 0.31" copper pads per terminal). This value assumes no additional heatsinking; for sustained power dissipation, designers should reference RθJL = 15 °C/W and consider PCB copper area or thermal vias to maintain TJ ≤ 150 °C under repetitive surge conditions.
SMCJ85AHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- 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)
SMCJ85AHM3/H FAQ
1.How can I place an order for SMCJ85AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ85AHM3/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 SMCJ85AHM3/H reliable?
The price and inventory of SMCJ85AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ85AHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ85AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ85AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ85AHM3/H?
SMCJ85AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ85AHM3/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 SMCJ85AHM3/H?
For technical support, including SMCJ85AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ85AHM3/H requirements.
6.How does Aetrix verify that SMCJ85AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ85AHM3/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 SMCJ85AHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ85AHM3/H?
All SMCJ85AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ85AHM3/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 SMCJ85AHM3/H part is unused and in its original packaging.
Return procedure for SMCJ85AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ85AHM3/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
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 …
