Murata MHR0309SA Replacement — SIP High Voltage Resistor

MHR0309SA cross reference

Item	Murata MHR0309SA	HVC alternative
Body (L × H)	10.1 × 5 mm	5.0 mm high, cut to 10.1 mm long, cut to 10.1 mm
Lead pitch	7.62 mm	Same, set on the drawing
Rated power	0.5 W	1 W
Rated voltage	3.5 kV single / 5 kV molded	5 kV air, continuous
Resistance	1–1000 MΩ, nine steps	Any value in range
Model	MHR0309SA	HVRGHP5.10

Plate cut to 10.1 mm. Murata figures are the catalogue values for this body. HVC ratings are continuous values in air. Confirm the medium and the duty in the RFQ.

Why buyers arrive with a MHR0309SA number

The usual case is not a purchase order. It is a repair, a drawing carried over from an older machine, or a design inherited from a supplier that no longer supports it. The number is the only firm fact available, and the question behind it is simply whether the part can still be obtained at the printed outline.

That is a different question from price. Murata builds MHR0309SA in nine resistance steps; anything between the steps, anything above 0.5 W, or anything above 3.5 kV in air has no catalogue answer at all, and that is where a cut-to-outline plate replaces the original rather than competing with it.

Reading the MHR0309SA voltage figure

Two columns sit behind the headline number: 3.5 kV for single use and 5 kV for molded use. The gap is the potting, not the resistor. A substitute quoted at the molded figure without the molding is not the same part, so state the medium and the duty in the enquiry and the quotation will match it.

MHR0309SA ordering codes

코드는 MHR0309SA plus a three digit resistance code, a tolerance letter and a two digit individual specification: 70 for single use, 20 for molded use. Standard resistance steps are 10, 15, 20, 25, 30, 40, 50, 68 and 80; the three digit code carries two significant figures and the number of zeros that follow.

Resistance	Code	Ordering number (±1%, single use)
1 MΩ	`105`	`MHR0309SA105F70`
1.5 MΩ	`155`	`MHR0309SA155F70`
2 MΩ	`205`	`MHR0309SA205F70`
2.5 MΩ	`255`	`MHR0309SA255F70`
3 MΩ	`305`	`MHR0309SA305F70`
4 MΩ	`405`	`MHR0309SA405F70`
5 MΩ	`505`	`MHR0309SA505F70`
6.8 MΩ	`685`	`MHR0309SA685F70`
8 MΩ	`805`	`MHR0309SA805F70`
10 MΩ	`106`	`MHR0309SA106F70`
15 MΩ	`156`	`MHR0309SA156F70`
20 MΩ	`206`	`MHR0309SA206F70`
25 MΩ	`256`	`MHR0309SA256F70`
30 MΩ	`306`	`MHR0309SA306F70`
40 MΩ	`406`	`MHR0309SA406F70`
50 MΩ	`506`	`MHR0309SA506F70`
68 MΩ	`686`	`MHR0309SA686F70`
80 MΩ	`806`	`MHR0309SA806F70`
100 MΩ	`107`	`MHR0309SA107F70`
150 MΩ	`157`	`MHR0309SA157F70`
200 MΩ	`207`	`MHR0309SA207F70`
250 MΩ	`257`	`MHR0309SA257F70`
300 MΩ	`307`	`MHR0309SA307F70`
400 MΩ	`407`	`MHR0309SA407F70`
500 MΩ	`507`	`MHR0309SA507F70`
680 MΩ	`687`	`MHR0309SA687F70`
800 MΩ	`807`	`MHR0309SA807F70`
1000 MΩ (1 GΩ)	`108`	`MHR0309SA108F70`

Tolerance letters: D ±0.5%, F ±1%, G ±2%, J ±5%, K ±10%, M ±20%. Replace F with the tolerance you need, and 70 과 20 for the molded specification. HVC builds any value in the range to the same outline.

MHR0309SA replacement FAQ

Do I need to have bought the MHR0309SA before?

No. Most enquiries arrive with a part number and no purchase history - a repair, a legacy drawing, or a design inherited from another team. Send the number and the quantity; HVC quotes a substitute against the printed outline rather than asking for an order history.

Is the MHR0309SA body still available?

HVC supplies the HVRGHP5.10 plate cut to 10.1 mm, 5 mm high, with the lead pitch set to 7.62 mm. This size is cut to drawing, the same CNC process used on the KOA RK92 SIP line.

What does the voltage figure actually mean?

Murata lists two columns: 3.5 kV single use and 5 kV molded use. The higher number depends on the part being potted. HVC quotes a continuous working voltage in air, so compare air with air and ask for the medium on any substitute you are offered.

Can HVC supply values outside the 1 to 1000 MΩ range?

Yes. Murata builds nine resistance steps; HVC builds any value in the range, which is the usual reason a buyer with a MHR0309SA drawing cannot simply re-order the original.