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Vishay General Semiconductor - Diodes Division SMPC85ANHM3/I
- Part No.:
- SMPC85ANHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC85ANHM3/I.pdf
- Description:
- TVS DIODE 85VWM 137VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:6,849
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Product details
Overview
SMPC85ANHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the TRANSZORB® family, designed for high-energy surge protection on power and signal lines. It features a 85 V stand-off voltage (VWM), 94.4–104 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and clamps to 137 V at 10.9 A IPPM - deployed in automotive sensor interfaces and industrial power supply rails.
For engineers reviewing the SMPC85ANHM3/I datasheet, SMPC85ANHM3/I pinout, SMPC85ANHM3/I application, or SMPC85ANHM3/I equivalent, key selection criteria include AEC-Q101 qualification, TO-277A (SMPC) package compatibility, unidirectional clamping behavior, thermal resistance (RθJA ≤ 100 °C/W), and compliance with J-STD-020 MSL Level 1 reflow.
Technical Context
This device operates as a silicon avalanche diode optimized for fast response (< 1 ns) to transient overvoltages induced by inductive switching or ESD events. Its unidirectional polarity requires cathode-band orientation toward the protected line's positive rail, with clamping action triggered only when reverse-biased beyond VBR.
Thermal performance is defined for FR4 PCB mounting (2 oz copper, standard footprint), where junction-to-ambient thermal resistance is rated up to 100 °C/W and junction-to-mount resistance is ≤ 3 °C/W - enabling reliable operation up to TJ = 150 °C under repetitive surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 94.4 V / 104 V at 1 mA - ensures precise breakdown threshold for predictable surge activation |
| PPPM | 1500 W (10/1000 μs waveform) - supports high-energy transients without failure |
| VC at IPPM | 137 V at 10.9 A - limits downstream voltage stress during worst-case surge |
| TJ max | +150 °C - enables use in under-hood automotive environments and industrial enclosures |
| MSL Level | Level 1 per J-STD-020 - allows standard SMT reflow without moisture sensitivity concerns |
| AEC-Q101 | Qualified - certified for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: SMPC (TO-277A), surface-mount, low-profile (1.1 mm typical height), matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 & Anode 2 | Common anode connection | Internally tied anodes enable dual-anode configuration for enhanced current sharing and thermal distribution |
| Cathode | Clamping output terminal | Connected to protected line; conducts during overvoltage to shunt surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm) | Enables placement in space-constrained modules such as automotive ECUs and compact sensor housings |
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| Meets UL 94 V-0 | Flame-retardant molding compound satisfies safety requirements for enclosed industrial equipment |
| Halogen-free & RoHS-compliant | Complies with environmental regulations for global OEM and Tier-1 supply chains |
Applications
| Automotive Sensor Protection | Industrial Power Supply Rail |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and ground, clamping transients before they reach sensitive input circuitry. Use Value: Maintains signal integrity under ISO 16750-2 load dump (up to 120 V) while surviving >1000 surges per AEC-Q101 stress testing. | Use Scenario: Safeguarding DC-DC converter inputs and microcontroller power rails in factory automation controllers exposed to motor drive noise. IC Role / Device Role / Timing Role: Primary surge suppression device on 24 V input stage, absorbing energy from relay coil flyback and contact arcing. Use Value: Limits clamped voltage to 137 V at 10.9 A, preventing latch-up or permanent damage to downstream LDOs and PMICs. |
| Telecom Interface Protection | Consumer Device USB/Power Port |
Use Scenario: Shielding Ethernet PHY interface circuits and PoE injectors from lightning-induced surges and EFT bursts in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Front-end unidirectional TVS on data line pair, coordinated with common-mode chokes and secondary protection. Use Value: Delivers 1500 W peak pulse handling with <1 ns response, meeting IEC 61000-4-5 Level 4 (4 kV) requirements. | Use Scenario: Hardening USB-C power delivery ports and battery charging circuits in portable medical devices against accidental 24 V adapter misconnection. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS line, activated only during overvoltage fault - no leakage impact during normal 5–20 V operation. Use Value: 1.0 μA max IR at 85 V ensures zero standby current drain, preserving battery life in always-on devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ85A-E3/5A | Same VWM (85 V) and PPPM (1500 W), but SMA package (higher RθJA ≈ 150 °C/W); not AEC-Q101 qualified | Limited to commercial/industrial use; unsuitable for automotive due to lack of qualification and lower thermal robustness | Select if cost-sensitive and automotive qualification is unnecessary; verify PCB thermal relief for sustained surge duty. |
| 1.5KE85A | Through-hole DO-201 package; same electrical specs but larger footprint and manual assembly required; no AEC-Q101 rating | Used in legacy industrial power supplies where automated SMT is unavailable or board real estate is unconstrained | Choose only for through-hole prototyping or repair; avoid for new automotive or high-volume SMT designs. |
Compared with SMAJ85A-E3/5A and 1.5KE85A, SMPC85ANHM3/I offers superior thermal performance in SMT layout, guaranteed AEC-Q101 compliance, and optimized low-profile packaging - making it the preferred choice for next-generation automotive and space-limited industrial electronics.
Availability
SMPC85ANHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power supply rail hardening, and telecom interface surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMPC85ANHM3/I 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMPC series was developed to deliver high-power, low-profile TVS protection for automotive and industrial applications where AEC-Q101 compliance, thermal efficiency, and automated assembly are mandatory design requirements.
FAQ
What is the exact breakdown voltage range for SMPC85ANHM3/I?
The SMPC85ANHM3/I has a specified breakdown voltage (VBR) range of 94.4 V to 104 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This tolerance ensures consistent clamping onset across production lots and supports robust design margining against system-level transients like ISO 7637-2 Pulse 5a.
Is SMPC85ANHM3/I compatible with lead-free reflow processes?
Yes, SMPC85ANHM3/I meets J-STD-020 MSL Level 1 and is rated for maximum peak reflow temperatures up to 260 °C. Its matte tin-plated terminals are fully compatible with standard lead-free SAC305 solder profiles and pass JESD 22-B102 solderability testing.
Does SMPC85ANHM3/I require heatsinking in typical applications?
No dedicated heatsink is required for SMPC85ANHM3/I in single-event surge applications. Its RθJM ≤ 3 °C/W and low-profile SMPC package enable sufficient heat dissipation via PCB copper when mounted on 2 oz FR4 with standard footprint - verified per JEDEC 51-14 TDIM methodology.
How does the dual-anode structure of SMPC85ANHM3/I improve performance?
The dual-anode construction in SMPC85ANHM3/I provides symmetrical current sharing during high-current surges, reducing localized heating and improving surge lifetime. This architecture also lowers incremental surge resistance compared to single-anode equivalents, resulting in tighter clamping voltage control at high IPPM.
Can SMPC85ANHM3/I be used in bidirectional configurations?
No - SMPC85ANHM3/I is strictly unidirectional. Its internal structure and cathode-band marking indicate polarity-dependent operation. For bidirectional protection, two SMPC85ANHM3/I devices must be connected in series opposition, or a dedicated bidirectional part (e.g., SMPC85CA) should be selected.
SMPC85ANHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- TO-277A (SMPC)
SMPC85ANHM3/I FAQ
1.How can I place an order for SMPC85ANHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC85ANHM3/I 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 SMPC85ANHM3/I reliable?
The price and inventory of SMPC85ANHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC85ANHM3/I is usually 5 days.
3.What payment methods are accepted for SMPC85ANHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC85ANHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC85ANHM3/I?
SMPC85ANHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC85ANHM3/I 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 SMPC85ANHM3/I?
For technical support, including SMPC85ANHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC85ANHM3/I requirements.
6.How does Aetrix verify that SMPC85ANHM3/I is sourced from the original manufacturer or authorized distributors?
All SMPC85ANHM3/I 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 SMPC85ANHM3/I meets industry standards.
7.What is the process for return or replacement of SMPC85ANHM3/I?
All SMPC85ANHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC85ANHM3/I, 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 SMPC85ANHM3/I part is unused and in its original packaging.
Return procedure for SMPC85ANHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC85ANHM3/I Tags
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