My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ8.5CAHM3/H
- Part No.:
- SMCJ8.5CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.5CAHM3/H.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,314
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ8.5CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 8.5 V stand-off voltage (VWM), and 14.4 V maximum clamping voltage (VC) at 104.2 A IPPM under 10/1000 μs waveform. It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive, industrial, and telecom systems against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMCJ8.5CAHM3/H datasheet, SMCJ8.5CAHM3/H pinout, SMCJ8.5CAHM3/H application, or SMCJ8.5CAHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), halogen-free RoHS compliance, and bidirectional clamping behavior - all critical for ESD/surge design validation and automotive-grade BOM selection.
Technical Context
The SMCJ8.5CAHM3/H operates as a bidirectional avalanche diode, clamping transient voltages symmetrically across both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling consistent response to repetitive 10/1000 μs surges up to 1500 W.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature tolerance and supports automotive reliability via AEC-Q101 qualification (denoted by HM3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum reverse stand-off voltage before clamping begins; defines safe operating range for protected circuitry. |
| VBR min / max | 9.44 V / 10.4 V at IT = 1.0 mA - Verified breakdown voltage window ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 14.4 V at 104.2 A - Clamping voltage under full 1500 W surge; limits stress on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 μs waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 20 μA - Low reverse leakage at stand-off voltage, minimizing quiescent power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature rating supporting operation in under-hood automotive environments. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards. Bidirectional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals function identically in bidirectional mode; surge current flows through either direction with identical clamping behavior. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces requiring long-term reliability under thermal cycling and vibration. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for Tier-1 automotive supply chains and industrial equipment sold in EU/Asia markets. |
| Low incremental surge resistance | Enables tighter clamping voltage margin (VC − VWM = 5.9 V), reducing voltage overshoot stress on protected ICs compared to higher-Rsurge TVS devices. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying SMT line integration and reducing manufacturing cost. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation essential for safety-critical applications in enclosed enclosures or high-density PCB layouts. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting 12 V power rails feeding body control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing ±100 V transients while maintaining <14.4 V rail integrity. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers during vehicle ignition cycles. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in PLC I/O modules from field wiring surges. IC Role / Device Role / Timing Role: Fast-response shunt device limiting transient energy before it reaches ADC input stages. Use Value: Maintains measurement accuracy and avoids false triggers caused by >1 kV EFT bursts on 4–20 mA loops. |
| Telecom Base Station DC Feeds | Consumer USB-C Port Protection |
Use Scenario: Safeguarding -48 V DC power inputs in remote radio units exposed to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: High-power bidirectional clamp handling multi-kA surge currents without degradation. Use Value: Enables single-device protection across both polarities, eliminating need for dual unidirectional TVS arrays. |
Use Scenario: Adding secondary surge immunity to USB-C receptacles in portable monitors and docking stations. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of ESD diodes to absorb bulk energy before fast ESD events. Use Value: Extends system-level IEC 61000-4-5 compliance beyond basic contact discharge testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W), same VWM/VC specs. | Suitable for space-constrained consumer electronics but not automotive or industrial surge-heavy environments. | Select when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 2. |
| SMCJ8.5CAHE3/H | Same electrical specs and SMC package, but RoHS-compliant commercial grade (E3) without AEC-Q101 qualification or halogen-free assurance. | Acceptable for non-automotive industrial use where qualification documentation is not required. | Choose for cost-sensitive designs where automotive qualification and halogen-free status are not mandated. |
Compared with SMCJ8.5CAHM3/H, SMAJ8.5CA offers reduced surge capacity in a smaller footprint, while SMCJ8.5CAHE3/H provides identical protection without automotive qualification - making SMCJ8.5CAHM3/H the only option meeting full AEC-Q101 + halogen-free + 1500 W requirements in SMC form factor.
Availability
SMCJ8.5CAHM3/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power supplies, and USB-C interface protection requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ8.5CAHM3/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 performance.
The SMCJ series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where failure resilience and regulatory compliance are mandatory.
FAQ
What does the "HM3" suffix indicate in SMCJ8.5CAHM3/H?
The HM3 suffix in SMCJ8.5CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - confirming suitability for automotive applications requiring strict material content control and reliability validation. This distinguishes it from E3 (RoHS commercial) or HE3 (AEC-Q101 but not halogen-free) variants. SMCJ8.5CAHM3/H is fully traceable to Vishay's qualified production lot records.
Is SMCJ8.5CAHM3/H bidirectional, and how does that affect PCB layout?
Yes, SMCJ8.5CAHM3/H is bidirectional, meaning it clamps transients equally in both directions without polarity dependence. As a result, no cathode band marking is present, and PCB layout requires no orientation constraint - simplifying automated placement and reducing assembly errors. This symmetry also eliminates the need for duplicate unidirectional devices in AC-coupled or floating signal paths.
What is the maximum clamping voltage of SMCJ8.5CAHM3/H under surge conditions?
The maximum clamping voltage (VC) of SMCJ8.5CAHM3/H is 14.4 V when subjected to its rated peak pulse current (IPPM = 104.2 A) using the standardized 10/1000 μs waveform. This value is measured at the device terminals and represents the upper voltage limit imposed on protected circuitry during worst-case surge events - a key parameter for verifying compatibility with downstream IC absolute maximum ratings.
Can SMCJ8.5CAHM3/H replace SMCJ8.5A in a design?
No - SMCJ8.5CAHM3/H is bidirectional while SMCJ8.5A is unidirectional, so direct replacement requires verification of circuit polarity and transient directionality. Unidirectional SMCJ8.5A includes a cathode band and conducts forward surge current (IFSM = 200 A); SMCJ8.5CAHM3/H has no polarity marking and handles symmetrical surges. Substitution may cause unintended conduction or inadequate protection if system grounding or signal coupling is asymmetric.
Does SMCJ8.5CAHM3/H meet UL recognition requirements?
Yes, SMCJ8.5CAHM3/H carries Underwriters Laboratories recognition under file E136766 for both unidirectional and bidirectional protectors per UL 497B, covering its use in telecommunications and industrial equipment. This certification validates its safety performance in surge protection applications, including flammability (UL 94 V-0) and electrical insulation integrity - critical for end-product safety approvals.
SMCJ8.5CAHM3/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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 104.2A
- 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)
SMCJ8.5CAHM3/H FAQ
1.How can I place an order for SMCJ8.5CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.5CAHM3/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 SMCJ8.5CAHM3/H reliable?
The price and inventory of SMCJ8.5CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.5CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ8.5CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.5CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.5CAHM3/H?
SMCJ8.5CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.5CAHM3/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 SMCJ8.5CAHM3/H?
For technical support, including SMCJ8.5CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.5CAHM3/H requirements.
6.How does Aetrix verify that SMCJ8.5CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ8.5CAHM3/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 SMCJ8.5CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ8.5CAHM3/H?
All SMCJ8.5CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.5CAHM3/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 SMCJ8.5CAHM3/H part is unused and in its original packaging.
Return procedure for SMCJ8.5CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.5CAHM3/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 …
