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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Vishay General Semiconductor - Diodes Division SS1H9-M3/61T

Name: SS1H9-M3/61T
Brand: Vishay General Semiconductor - Diodes Division
SKU: SS1H9-M3/61T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SS1H9-M3/61T

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: SS1H9-M3/61T.pdf

Description:: DIODE SCHOTTKY 90V 1A DO214AC

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Product details

Overview

SS1H9-M3/61T from Vishay General Semiconductor is a high-voltage surface-mount Schottky rectifier in SMA (DO-214AC) package, rated for 90 V repetitive peak reverse voltage, 1.0 A average forward current, and 50 A surge capability. It features low forward voltage drop (0.62 V at 1.0 A, 125 °C), 1.0 μA reverse leakage at 25 °C, and operates up to 175 °C junction temperature - ideal for DC/DC converter freewheeling diodes.

For engineers reviewing the SS1H9-M3/61T datasheet, SS1H9-M3/61T pinout, SS1H9-M3/61T application, or SS1H9-M3/61T equivalent, key selection criteria include its halogen-free RoHS-compliant construction, MSL Level 1 rating, AEC-Q101 qualification readiness (via HM3 suffix variants), and thermal resistance of 88 °C/W (R_θJA) under standard PCB mounting.

Technical Context

The SS1H9-M3/61T employs high-barrier Schottky technology to achieve improved high-temperature stability versus conventional Schottkys, enabling reliable operation at T_J = 175 °C. Its single-diode configuration, cathode-band polarity marking, and matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.

Designed for high-frequency switching environments, it delivers low power loss via 0.62 V forward voltage at rated current and elevated temperature, while maintaining only 1.0 μA reverse leakage at 25 °C - critical for efficiency-sensitive 12 V–48 V DC/DC stages and reverse-polarity protection circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	90 V - supports input rails up to 72 V DC with 25 % safety margin in industrial power supplies
I_F(AV)	1.0 A - continuous conduction capability for sub-15 W DC/DC output stages
I_FSM	50 A - withstands short-duration inrush and fault currents without bond-wire failure
V_F	0.62 V @ 1.0 A, 125 °C - reduces conduction loss by ≥35 % vs. silicon PN rectifiers at same current
I_R	1.0 μA @ 25 °C - minimizes standby power drain in battery-backed systems
T_J(max)	175 °C - enables operation in sealed enclosures or high-ambient automotive under-hood zones
R_θJA	88 °C/W - requires ≥5.0 mm × 5.0 mm copper pad for thermal compliance per JEDEC standard

Pinout & Package

SMA (DO-214AC) surface-mount package with molded UL 94 V-0 compound, cathode identified by color band. Matte tin-plated terminals ensure robust solder joint integrity per J-STD-002.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to lower-potential node (e.g., switch-node ground return in buck converters)
Cathode	Current exit point during forward conduction; marked by band	Connected to output rail or positive supply; blocks reverse current above 90 V

Key Features

Feature	Design Value
High-barrier Schottky architecture	Enables stable V_F and I_R performance up to 175 °C junction temperature
Guardring overvoltage protection	Prevents premature edge breakdown under transient voltage stress in unclamped topologies
MSL Level 1 moisture sensitivity	Allows unlimited floor life and reflow at 260 °C peak without baking preconditioning
Halogen-free, RoHS-compliant (M3 suffix)	Meets IPC-1752A material declaration requirements for green electronics manufacturing
Low-profile SMA footprint	Facilitates automated placement in space-constrained power modules and PoE injectors

Applications

DC/DC Converter Freewheeling Diode	Polarity Protection
Use Scenario: Used as the catch diode in non-synchronous buck converters delivering 5–12 V at ≤1 A. IC Role / Device Role / Timing Role: Provides low-loss current path during high-side switch off-time; conducts reverse-recovery–free current. Use Value: 0.62 V V_F at 125 °C reduces conduction loss by 0.62 W vs. 1.1 V Si diode, improving full-load efficiency by ≥2.5 %.	Use Scenario: Placed in series with input power rail to block reverse connection in 24 V industrial sensors. IC Role / Device Role / Timing Role: Unidirectional current gate; blocks >90 V reverse potential while passing 1 A forward load. Use Value: 1.0 μA I_R at 25 °C limits reverse-bias leakage to <2.5 μW, preserving battery life in always-on devices.
Low-Voltage Inverter Output Stage	Automotive Body Control Module (BCM) Power Rail
Use Scenario: Freewheeling path in half-bridge inverters driving 12 V BLDC fans or solenoids. IC Role / Device Role / Timing Role: Clamps inductive kickback energy during PWM dead-time; handles 50 A I_FSM surges. Use Value: 50 A surge rating supports 10× rated current peaks without thermal runaway, enabling compact heatsinkless designs.	Use Scenario: Reverse-polarity and load-dump protection in 12 V BCM power inputs per ISO 7637-2. IC Role / Device Role / Timing Role: First-line protection device; clamps transients via guardring-enhanced edge termination. Use Value: AEC-Q101 qualified variants (HM3 suffix) are available; this M3 version shares identical die and thermal design for pre-qualification prototyping.

DC/DC Converter Freewheeling Diode

Polarity Protection

Use Scenario: Used as the catch diode in non-synchronous buck converters delivering 5–12 V at ≤1 A.

IC Role / Device Role / Timing Role: Provides low-loss current path during high-side switch off-time; conducts reverse-recovery–free current.

Use Value: 0.62 V V_F at 125 °C reduces conduction loss by 0.62 W vs. 1.1 V Si diode, improving full-load efficiency by ≥2.5 %.

Use Scenario: Placed in series with input power rail to block reverse connection in 24 V industrial sensors.

IC Role / Device Role / Timing Role: Unidirectional current gate; blocks >90 V reverse potential while passing 1 A forward load.

Use Value: 1.0 μA I_R at 25 °C limits reverse-bias leakage to <2.5 μW, preserving battery life in always-on devices.

Low-Voltage Inverter Output Stage

Automotive Body Control Module (BCM) Power Rail

Use Scenario: Freewheeling path in half-bridge inverters driving 12 V BLDC fans or solenoids.

IC Role / Device Role / Timing Role: Clamps inductive kickback energy during PWM dead-time; handles 50 A I_FSM surges.

Use Value: 50 A surge rating supports 10× rated current peaks without thermal runaway, enabling compact heatsinkless designs.

Use Scenario: Reverse-polarity and load-dump protection in 12 V BCM power inputs per ISO 7637-2.

IC Role / Device Role / Timing Role: First-line protection device; clamps transients via guardring-enhanced edge termination.

Use Value: AEC-Q101 qualified variants (HM3 suffix) are available; this M3 version shares identical die and thermal design for pre-qualification prototyping.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay SS1H9-E3/61T	Same die, RoHS-compliant but not halogen-free; E3 suffix denotes standard lead finish	No difference in circuit function or thermal behavior; differs only in material compliance reporting	Select E3 for commercial-grade cost-sensitive designs where halogen-free certification is not mandated
ON Semiconductor SB190	90 V V_RRM, 1.0 A I_F(AV), but higher V_F (0.85 V @ 1 A, 25 °C) and lower T_J(max) (150 °C)	Less suitable for high-ambient or high-efficiency applications due to higher conduction loss and thermal derating	Choose SB190 only if legacy footprint compatibility is required and thermal margin exceeds 25 °C

Compared with SS1H9-E3/61T, the SS1H9-M3/61T offers identical electrical performance with halogen-free assurance for strict environmental compliance programs; versus SB190, it delivers 0.23 V lower forward drop at operating temperature and extends usable ambient range by 25 °C via 175 °C T_J(max).

Availability

SS1H9-M3/61T is available at Aetrix Electronics and suitable for DC/DC converters, polarity protection circuits, and low-voltage inverter freewheeling applications requiring stable component supply, halogen-free compliance, and extended temperature operation.

Supply support for SS1H9-M3/61T 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 optoelectronics with emphasis on reliability, thermal performance, and automotive-grade qualification.

The SS1H9-M3/61T belongs to Vishay's high-voltage Schottky rectifier family, engineered for high-efficiency, high-temperature power conversion in space-constrained industrial and transportation systems.

FAQ

What is the maximum junction temperature rating for the SS1H9-M3/61T?

The SS1H9-M3/61T has a maximum junction temperature (T_J(max)) of 175 °C, verified per Vishay Document Number 88747. This rating allows sustained operation in high-ambient environments such as enclosed power supplies or under-hood automotive locations. Derating curves in Figure 1 confirm 1.0 A I_F(AV) remains valid up to 125 °C case temperature when mounted on 5.0 mm × 5.0 mm copper pads. The SS1H9-M3/61T must not exceed this limit to maintain parametric integrity and long-term reliability.

Is the SS1H9-M3/61T AEC-Q101 qualified?

The SS1H9-M3/61T itself is not AEC-Q101 qualified; however, Vishay offers the functionally identical SS1H9-HM3_B/H variant with full AEC-Q101 qualification (Document Number 88747, footnote 1). The SS1H9-M3/61T shares the same die, package, and thermal design - making it suitable for pre-qualification prototyping and commercial applications where automotive qualification is not yet mandatory. For production automotive use, specify HM3 suffix parts.

What does the "M3" suffix indicate in SS1H9-M3/61T?

The "M3" suffix in SS1H9-M3/61T denotes halogen-free, RoHS-compliant construction per Vishay's material categorization standard (www.vishay.com/doc?99912). It specifies matte tin-plated leads meeting JESD 201 Class 2 whisker resistance, UL 94 V-0 molding compound, and absence of brominated flame retardants. This distinguishes it from the E3 suffix (RoHS-compliant but not halogen-free) and HE3/HM3 variants (AEC-Q101 qualified versions). The SS1H9-M3/61T meets IPC-1752A reporting requirements for green manufacturing.

What is the thermal resistance (R_θJA) of the SS1H9-M3/61T, and how is it measured?

The SS1H9-M3/61T has a maximum junction-to-ambient thermal resistance (R_θJA) of 88 °C/W, measured per JEDEC JESD51-2 with the device mounted on a 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad on a 1-layer FR-4 board. This value assumes no internal plane layers or thermal vias. To achieve this rating, PCB layout must replicate the test condition - undersized pads increase R_θJA and risk thermal runaway. The SS1H9-M3/61T's R_θJL is 30 °C/W to the lead, supporting IR-reflow profile validation.

How does the guardring feature improve reliability in the SS1H9-M3/61T?

The guardring in the SS1H9-M3/61T provides edge termination that suppresses electric field crowding at the silicon periphery, preventing premature avalanche breakdown during voltage transients. This is confirmed in Vishay Document Number 88747 under "FEATURES" and validated by I_RRM testing (1.0 A peak reverse surge at 2.0 μs). In applications like unclamped inductive switching or load-dump events, the guardring allows the SS1H9-M3/61T to sustain overvoltage without degradation - a key differentiator from basic Schottky diodes lacking this structure.

SS1H9-M3/61T Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 90 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 860 mV @ 2 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 90 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

Operating Temperature - Junction:: -65°C ~ 175°C

SS1H9-M3/61T FAQ

1.How can I place an order for SS1H9-M3/61T through Aetrix?

Please submit a Request for Quotation (RFQ) for SS1H9-M3/61T 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 SS1H9-M3/61T reliable?

The price and inventory of SS1H9-M3/61T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS1H9-M3/61T is usually 5 days.

3.What payment methods are accepted for SS1H9-M3/61T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS1H9-M3/61T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS1H9-M3/61T?

SS1H9-M3/61T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS1H9-M3/61T 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 SS1H9-M3/61T?

For technical support, including SS1H9-M3/61T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS1H9-M3/61T requirements.

6.How does Aetrix verify that SS1H9-M3/61T is sourced from the original manufacturer or authorized distributors?

All SS1H9-M3/61T 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 SS1H9-M3/61T meets industry standards.

7.What is the process for return or replacement of SS1H9-M3/61T?

All SS1H9-M3/61T units undergo pre-shipment inspection (PSI). If there is an issue with SS1H9-M3/61T, 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 SS1H9-M3/61T part is unused and in its original packaging.

Return procedure for SS1H9-M3/61T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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