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Vishay General Semiconductor - Diodes Division SMPC70ANHM3/H
- Part No.:
- SMPC70ANHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC70ANHM3/H.pdf
- Description:
- TVS DIODE 70VWM 113VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:9,274
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Product details
Overview
SMPC70ANHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the TRANSZORB® family, designed for high-energy surge protection on DC power rails and signal lines. It features a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and clamps to 113 V at 13.3 A IPPM. It is AEC-Q101 qualified and used in automotive power electronics for protecting MOSFETs and microcontrollers against load dump and inductive switching transients.
For engineers reviewing the SMPC70ANHM3/H datasheet, SMPC70ANHM3/H pinout, SMPC70ANHM3/H application, or SMPC70ANHM3/H equivalent, key selection criteria include its unidirectional polarity, TO-277A (SMPC) package with cathode band marking, 1.1 mm profile, MSL Level 1 rating, and AEC-Q101 qualification for under-hood automotive use.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below VWM = 70 V and rapidly avalanches above VBR to limit transient overvoltages. Its low incremental surge resistance and fast response time ensure effective suppression of 10/1000 μs waveform surges up to 1500 W without degradation.
The SMPC70ANHM3/H uses a planar junction structure in a dual-anode/single-cathode configuration (per SMPCxxAN pinout), enabling symmetric thermal dissipation when mounted with cathode on heatsink. It is rated for TJ = –55 °C to +150 °C and meets JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VBR min/max | 77.8 V / 86.0 V at 1 mA - guaranteed avalanche onset range for reliable clamping threshold |
| VC @ IPPM | 113 V at 13.3 A - clamped voltage during 10/1000 μs surge, defining protected circuit's max stress level |
| PPPM | 1500 W - peak pulse power handling per 10/1000 μs waveform, critical for ISO 7637-2 load dump compliance |
| Package | SMPC (TO-277A) - surface-mount, 3-terminal, low-profile (1.1 mm height), AEC-Q101 qualified |
| Polarity | Unidirectional - single-direction conduction; cathode marked by band, anodes are pins 1 & 2 |
| TJ max | +150 °C - enables operation in under-hood automotive environments without derating at full power |
Pinout & Package
SMPC70ANHM3/H uses the SMPC (TO-277A) package: a 3-pin, low-profile surface-mount outline with dual anodes and a common cathode. The cathode is marked by a band on the top surface; pins 1 and 2 are anodes, pin 3 is cathode. Mounting requires cathode-side thermal pad contact for optimal RθJM = 2.5 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | One of two parallel anode terminals; connects to protected line; enables symmetrical current sharing and thermal distribution |
| Pin 2 | Anode 2 | Second anode terminal; electrically identical to Pin 1; required for full-rated PPPM and thermal performance |
| Pin 3 | Cathode | Common cathode terminal marked by band; must be connected to ground or low-impedance return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring reliability under temperature cycling and humidity |
| Low-profile SMPC package | 1.1 mm typical height enables use in space-constrained modules such as ADAS ECUs and battery management systems |
| 1500 W peak pulse rating | Supports ISO 7637-2 Test Pulse 5a (load dump) up to 120 V with margin, eliminating need for cascaded protection stages |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and JESD22-B102, compatible with lead-free reflow profiles up to 260 °C peak |
| MSL Level 1 rating | Allows unlimited floor life and standard SMT processing without baking, reducing manufacturing overhead |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed MCU power inputs in engine control modules against load dump transients exceeding 100 V. IC Role / Device Role / Timing Role: Clamping TVS diode placed directly at power entry point, conducting surge current away from downstream regulators and logic ICs. Use Value: Limits voltage seen by protected ICs to ≤113 V during 1500 W surges, satisfying ISO 7637-2 Pulse 5a requirements without additional filtering. | Use Scenario: Safeguarding analog sensor inputs and digital enable lines in variable-frequency drives exposed to inductive kickback from relay coils and solenoids. IC Role / Device Role / Timing Role: Unidirectional transient suppressor on 24 V control rails, triggered only during positive-going overvoltage events. Use Value: Prevents latch-up or gate oxide damage in isolated I/O buffers by clamping transients within 1 ns, with <1 μA leakage at 70 V. |
| Telecom DC Power Interface | Consumer Appliance Mainboard ESD/Surge Protection |
Use Scenario: Securing PoE-powered Ethernet switch ports and base station DC inputs against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge arrestor on 48 V DC input stage, coordinated with upstream fuses and downstream TVS arrays. Use Value: Handles 10/1000 μs surges up to 13.3 A while maintaining <1 μA IR at 70 V, ensuring minimal standby power loss. | Use Scenario: Hardening AC-DC adapter outputs and USB-C PD negotiation lines in smart home hubs against ESD and mains-coupled transients. IC Role / Device Role / Timing Role: Secondary-level TVS on regulated 5 V/3.3 V rails, placed after primary bulk clamping to reduce voltage overshoot. Use Value: Provides 113 V clamping with 1.1 mm height-fitting beneath compact metal shields without compromising board clearance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70A-E3/5A | DO-214AC package; 70 V VWM; 1500 W PPPM; unidirectional; no AEC-Q101 qualification | Industrial/commercial use only; lacks automotive qualification and lower thermal resistance (RθJA ≈ 110 °C/W vs. 85 °C/W) | Select SMAJ70A-E3/5A for cost-sensitive non-automotive designs where MSL Level 1 and 1.1 mm height are not required. |
| 1.5KE70A | DO-201 package; 70 V VWM; 1500 W PPPM; unidirectional; through-hole; no AEC-Q101 | Requires PCB real estate and wave-solder process; unsuitable for automated SMT lines or high-vibration environments | Choose 1.5KE70A only for legacy through-hole designs or prototyping where reflow compatibility and AEC-Q101 are not mandated. |
Compared with SMAJ70A-E3/5A and 1.5KE70A, SMPC70ANHM3/H delivers superior thermal performance (RθJM = 2.5 °C/W), AEC-Q101 validation, and ultra-low profile-making it the sole choice for production automotive SMT assemblies requiring long-term reliability under thermal cycling and mechanical shock.
Availability
SMPC70ANHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drives, telecom power interfaces, and consumer appliance mainboards requiring stable component supply across extended product lifecycles.
Supply support for SMPC70ANHM3/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 SMPC series was developed to address high-power, low-profile TVS requirements in automotive and industrial environments-delivering AEC-Q101 qualified surge protection in JEDEC TO-277A packaging with optimized thermal path design.
FAQ
What is the clamping voltage of SMPC70ANHM3/H at its rated peak pulse current?
The SMPC70ANHM3/H clamps to 113 V at its specified peak pulse current of 13.3 A under a 10/1000 μs waveform. This value is measured with the cathode mounted on a heatsink and defines the maximum voltage imposed on protected circuitry during surge events. The clamping behavior is consistent across production lots and validated per ANSI/IEEE C62.35 standards.
Is SMPC70ANHM3/H suitable for automotive applications?
Yes, SMPC70ANHM3/H is AEC-Q101 qualified and specifically intended for automotive use. Its qualification covers temperature cycling, humidity testing, and mechanical shock-making it appropriate for engine control units, body control modules, and ADAS power supplies. The HM3 suffix explicitly denotes AEC-Q101 compliance, unlike M3-only variants.
What does the "HM3" suffix mean in SMPC70ANHM3/H?
The "HM3" suffix in SMPC70ANHM3/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from industrial-grade "M3" parts and confirms compliance with automotive reliability standards, JESD201 Class 2 whisker resistance, and JEDEC MSL Level 1 handling requirements.
How is the polarity configured on SMPC70ANHM3/H?
SMPC70ANHM3/H is unidirectional with a cathode-marked terminal (band) corresponding to Pin 3. Pins 1 and 2 are anodes. This configuration allows conduction only during positive transients on the anode side relative to cathode-ideal for protecting positive DC rails. Polarity must be observed during placement to avoid open-circuit failure.
What is the thermal resistance from junction to mount for SMPC70ANHM3/H?
The SMPC70ANHM3/H has a typical junction-to-mount thermal resistance (RθJM) of 2.5 °C/W when the cathode is thermally connected to a heatsink or copper pour. This low value enables efficient heat extraction during repetitive surge events and supports sustained operation at TJ = 150 °C-critical for under-hood automotive deployment.
SMPC70ANHM3/H 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):
- 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:
- 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)
SMPC70ANHM3/H FAQ
1.How can I place an order for SMPC70ANHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC70ANHM3/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 SMPC70ANHM3/H reliable?
The price and inventory of SMPC70ANHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC70ANHM3/H is usually 5 days.
3.What payment methods are accepted for SMPC70ANHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC70ANHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC70ANHM3/H?
SMPC70ANHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC70ANHM3/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 SMPC70ANHM3/H?
For technical support, including SMPC70ANHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC70ANHM3/H requirements.
6.How does Aetrix verify that SMPC70ANHM3/H is sourced from the original manufacturer or authorized distributors?
All SMPC70ANHM3/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 SMPC70ANHM3/H meets industry standards.
7.What is the process for return or replacement of SMPC70ANHM3/H?
All SMPC70ANHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMPC70ANHM3/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 SMPC70ANHM3/H part is unused and in its original packaging.
Return procedure for SMPC70ANHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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